CA1256517B - Polarized signal receiver system - Google Patents
Polarized signal receiver systemInfo
- Publication number
- CA1256517B CA1256517B CA000569136A CA569136A CA1256517B CA 1256517 B CA1256517 B CA 1256517B CA 000569136 A CA000569136 A CA 000569136A CA 569136 A CA569136 A CA 569136A CA 1256517 B CA1256517 B CA 1256517B
- Authority
- CA
- Canada
- Prior art keywords
- waveguide
- signal receiver
- receiver
- polarized
- polarized signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000523 sample Substances 0.000 claims abstract description 32
- 239000012212 insulator Substances 0.000 claims abstract description 12
- 239000004020 conductor Substances 0.000 claims abstract description 11
- 230000010287 polarization Effects 0.000 claims abstract description 10
- 230000008878 coupling Effects 0.000 claims abstract description 3
- 238000010168 coupling process Methods 0.000 claims abstract description 3
- 238000005859 coupling reaction Methods 0.000 claims abstract description 3
- 230000008054 signal transmission Effects 0.000 claims abstract 2
- 230000005540 biological transmission Effects 0.000 claims description 25
- 230000005684 electric field Effects 0.000 claims 4
- 101150087426 Gnal gene Proteins 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- YSGQGNQWBLYHPE-CFUSNLFHSA-N (7r,8r,9s,10r,13s,14s,17s)-17-hydroxy-7,13-dimethyl-2,6,7,8,9,10,11,12,14,15,16,17-dodecahydro-1h-cyclopenta[a]phenanthren-3-one Chemical compound C1C[C@]2(C)[C@@H](O)CC[C@H]2[C@@H]2[C@H](C)CC3=CC(=O)CC[C@@H]3[C@H]21 YSGQGNQWBLYHPE-CFUSNLFHSA-N 0.000 description 1
- 206010009696 Clumsiness Diseases 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 150000001768 cations Chemical group 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
- H01P5/082—Transitions between hollow waveguides of different shape, e.g. between a rectangular and a circular waveguide
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/165—Auxiliary devices for rotating the plane of polarisation
- H01P1/17—Auxiliary devices for rotating the plane of polarisation for producing a continuously rotating polarisation, e.g. circular polarisation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
- H01Q21/245—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction provided with means for varying the polarisation
Abstract
ABSTRACT
A rotatable polarized signal receiver in a system for receiving linearly polarized electromagnetic signals includes a signal conductor having a receiver probe portion, oriented in a circular waveguide parallel to the polarization of the incident signal, and signal launch probe portion extending into the rectangular waveguide orthogonal to the direction of signal transmission therein, mounted concentrically in an insulator rod through perpendicular coupling of the circular and rectangular waveguides.
A rotatable polarized signal receiver in a system for receiving linearly polarized electromagnetic signals includes a signal conductor having a receiver probe portion, oriented in a circular waveguide parallel to the polarization of the incident signal, and signal launch probe portion extending into the rectangular waveguide orthogonal to the direction of signal transmission therein, mounted concentrically in an insulator rod through perpendicular coupling of the circular and rectangular waveguides.
Description
~ 2~
~ ~ ~ ~ 4~
pOLARIZED $IGN~ RECEIVER SYSTEM
BACKGROUND AND SU~RY OF T~E INVENTION
~ n satellite retra~smission of commun~cation signals, two l~nearly polarized signals, rotated 90 degrees from each other, are used. In less expensive installations for receiving such signals, the feed horn for the receiving system is installed with the orientation parallel to the desired signal polarization. The other polarization is not detected and is simply xeflected back out of the feed horn. ~or more expensive installations, the entire feed horn and low noise amplifier system is mounted on a rotator similar to the type used on ~ome television antennas to select the desired signal polarization.
~ hile the above-mentioned systems are cost effective, they are mechanically cumbersome and limit system performance. Other prior art signal polarization rotators electrically rotate the signal field in a ferrite media.
While such rotatorselimiinalte the mechanical clumsiness of the above-described rotators, they ara expensive and introduce additional signal losses (approximate 0.2 DB) into the receiving system. See, for example, such an electronic antennae rotator marked by Luly Telecommunica-tions Corp., P.O. Box 2311, San Bernardino, CA, and called a LULY (trade mark) polarizer by that company.
The presen-t invention eliminates the mechanical disadvantages oE several prior art rotators and eliminates signal losses associated with other prior art rotators. A
~56S~q signal detector constructed accordin.g to the principles of th.e present invention compr~ses a transmission line h.aving a signal receiver probe portion ("RP portion") and a signal launch probe portion ("LP portion") mounted in dielectric rod at t~e one. end of a circular waveguide and a rectangular waveguide perpendicularly coupled to the circular waveguide. The RP portion of the transmission line detects polarized incoming signals in the circular waveguide and th.e LP portion launches the detected signal into the rectangular wave-guide for transmission to a low noise amplifier ("LNA").
In the preferred embodiment, th.e transmission line, by its coupling to the insulator rod, may be rotated continu~usly and selectively ~y a servo motor mounted on the waveguide assem~ly. ~s the RP portion rotates to receive the desired signal, the LP portion also rotates. HQwever, the launched signal or the signal received at the LN~ is unafected because rotation of the LP portion is about its axis of symmetry in the rectangu-lar waveguide. Th.e RP portion in the circular waveguide rotates between the t~o orthogonally polarized signals impinging on the feed horn. By rotation to the desired polarization, that signal is received and the other reflected. The selected signal is then conducted along the transmission line to the rear wall of the circular waveguide portion o~ the eed h.orn and is launched into the rectangular waveguide ~y the LP portion.
~S~i5~7 An aspect of -th.e invention i5 as follows:
polarized signal receiver compris~ng:
a first waveguide for t~ansmitting polarized signals;
a circular wavegu~de for receiving polarized signals at one end and coupled to t~e first waveguide at the other end, said other end h.aving a rear wall;
an insulato~ rod, ratatabl~ mounted th.rough said oth~er end of the circular.waveguide; and signal conducting means~ fixedly mounted in the insulator rod concentric with. the axis of rotation thereof having a receiver probe portion oriented in the circular waveguide orthogonal to the axis of said circular wave-guide for receiving one polarization of the incident signal, a launch. probe portion concentric with the insulator rod and extending into the first waveguide for launching said signal therein, and a transmission line portion, having a first section contoured to the inside surface of the circular wall, and substantially pa~allel to the axis, of the circular waveguide, and h.av~ng a second section con-toured to th.e inside surface, and substantially parallel to the plane, of the rear wall of the circular waveguide, for connecting the receiver probe portion to the launch.
pro~e portion.
DESCRIP~:CON OF THE: DRA~NGS
.
Figure 1 is a cross-sectional view-of a prior art waveguide assembly with An internal rotating signal detector, Fig. 2 is a cross-sectio.nal view of a waveguide ~:2S6S~L7 assembly with internal rotati.ng signal detector constructed according to t~e pxinciples of th.e present invention.
Figure 3 ~s a cross-sectional ~iew of the waveguide assem~ly and internal rotating signal detector of Figure 2 further including a feed Horn.
DESCRIPTION OF THE pRE~ERRED E~BOD~MENT
~ .
Referring first to Figure 1, prior art mechanical internal rotating signal receivers provided low impedance coaxial transmission line through the back of the circular waveguide at 6 to LP portion 7. However, RP portion 5 of transmission line 4 presents an incorrect impedance to the incident signal, because the energy is coupled from the high impedance end of RP portion 5 ~y transmission line portion 9 and the low i~pedance end of RP portion 5 is open circuited. Thus, the trans~ission line and RP portion impedances present in thi.s configuration are reversed for ef~ectiye detection of ~n incident waVe.
Referring now to Figu~e 2, one embodiment of the present inve.ntion comprises circular waveguide 10 perpen-dicularly coupled to rec-tangular wave~uide 22 and including signal conductor 12 fixedly mounted in insulator 20.
Signal conductor 12 includes RP portion 13 oriented orthogonal to the axis of symmetxy of circular wavegu~de lQ, LP portion 18 extending into, and orthogonal to the axis of, waveguide 22, and coupled to RP portion 13 by conductor portions 16. Signal. conductor 12 is typically constructed of a single, continuous h.omogenous electrical ~:2S~5~
conductor ~herein RP pOrtiQn 13 is approximately one-quarter wavelength long and transmission line portions 16 form a transmission line in the same manner that any single wire a~ove a ground plane ~ecomes a transmission line. The portion of signal conductor 12, extending through the rear ~all of round waveguide la at 6, forms a low impedance coaxial transmission line. LP portion 18 launches the detected signal into rectangular waveguide 22.
Insulator 20, const~ucted of polystyrene or other suita~le dielectric xod, provides mounting for signal conductor 12, electrical insulation of the line from the walls of waveguides la and 22, and for selective rotation of signal conductor 12 a~out its axis of symmetry. Since signal conductor 12 is concentric with axis of rotation of insulatQr 2Q, rotation of insulator 20 about its axis rotates LP portion 18, which correspondingly rotates RP
portion 13 orthogonally a~out the axis of symmetry of wave-guide 10. RP portion 13 is there~y oriented to the polar-ity-of the desired incident signal for detection.
The preferred em~odiment of the present invention is shown in Figure 3. In this configuration, circular waveguide la is coaxially coupled to feed horn 8 at one end and perpendicularly coupled to rectangular waveguide 22 at the other end. ~s ~n the con~iguration of Figure 3, signal conducto~ 12 is coupled to insulator 20, which is coupled to servo moto~ 17 for positioning~ Servo motor 17 is usually the same as or similar to servo motors used ~2565~
in remotely controlled model aircraft for control surface movement. O~viously, w~ith. th.e addition of ser~o motor 17, operation of th.e detector system may ~e remotely controlled from the operatorls control pane].~ Feed horn 8 may be of the type descri~ed in Canadian Patent Application Serial No. 405,814, flled 3une 23, 1982.
The directionof signal$ transmitted in waveguide 22 is orth.ogonal to the direction of si.gnals transmitted in waveguide lQ. This configuration facilitates the simplicity of th.e present invention, since launching of signals into ~aveguide 22 is insensitive to rotation of LP
portion 18, which rotation directly results from rotation of RP portion 13 necessary- to select the desired signal.
LP portion 18 is capa~le of launching tne detected signal into another waveguide of any shape or into coaxial cable transmission line. Thus, as th.e transmission line 12 rotates, RP portion 13 rotates orthogonally to, and LP
portian 18 rotates concentr~cally with. the axis of symmetry of the round ~aveguide. As the RP portion aligns with the desired linearly polarized signal present in the circular ~aveguide, the signal is detected and conducted along the transmission line to th.e LP portion, which.
launches the detected s~gnal. As stated earlier in this specification, the launched s~gnal or th.e signal received at the LNA (not shown) is unaffected ~y the orientation of RP portion 13 because LP porti.on 18 rotates about ~ts axis of symmetry and such rotation retains the relative position of LP portion 18 with waveguide 22.
~ ~ ~ ~ 4~
pOLARIZED $IGN~ RECEIVER SYSTEM
BACKGROUND AND SU~RY OF T~E INVENTION
~ n satellite retra~smission of commun~cation signals, two l~nearly polarized signals, rotated 90 degrees from each other, are used. In less expensive installations for receiving such signals, the feed horn for the receiving system is installed with the orientation parallel to the desired signal polarization. The other polarization is not detected and is simply xeflected back out of the feed horn. ~or more expensive installations, the entire feed horn and low noise amplifier system is mounted on a rotator similar to the type used on ~ome television antennas to select the desired signal polarization.
~ hile the above-mentioned systems are cost effective, they are mechanically cumbersome and limit system performance. Other prior art signal polarization rotators electrically rotate the signal field in a ferrite media.
While such rotatorselimiinalte the mechanical clumsiness of the above-described rotators, they ara expensive and introduce additional signal losses (approximate 0.2 DB) into the receiving system. See, for example, such an electronic antennae rotator marked by Luly Telecommunica-tions Corp., P.O. Box 2311, San Bernardino, CA, and called a LULY (trade mark) polarizer by that company.
The presen-t invention eliminates the mechanical disadvantages oE several prior art rotators and eliminates signal losses associated with other prior art rotators. A
~56S~q signal detector constructed accordin.g to the principles of th.e present invention compr~ses a transmission line h.aving a signal receiver probe portion ("RP portion") and a signal launch probe portion ("LP portion") mounted in dielectric rod at t~e one. end of a circular waveguide and a rectangular waveguide perpendicularly coupled to the circular waveguide. The RP portion of the transmission line detects polarized incoming signals in the circular waveguide and th.e LP portion launches the detected signal into the rectangular wave-guide for transmission to a low noise amplifier ("LNA").
In the preferred embodiment, th.e transmission line, by its coupling to the insulator rod, may be rotated continu~usly and selectively ~y a servo motor mounted on the waveguide assem~ly. ~s the RP portion rotates to receive the desired signal, the LP portion also rotates. HQwever, the launched signal or the signal received at the LN~ is unafected because rotation of the LP portion is about its axis of symmetry in the rectangu-lar waveguide. Th.e RP portion in the circular waveguide rotates between the t~o orthogonally polarized signals impinging on the feed horn. By rotation to the desired polarization, that signal is received and the other reflected. The selected signal is then conducted along the transmission line to the rear wall of the circular waveguide portion o~ the eed h.orn and is launched into the rectangular waveguide ~y the LP portion.
~S~i5~7 An aspect of -th.e invention i5 as follows:
polarized signal receiver compris~ng:
a first waveguide for t~ansmitting polarized signals;
a circular wavegu~de for receiving polarized signals at one end and coupled to t~e first waveguide at the other end, said other end h.aving a rear wall;
an insulato~ rod, ratatabl~ mounted th.rough said oth~er end of the circular.waveguide; and signal conducting means~ fixedly mounted in the insulator rod concentric with. the axis of rotation thereof having a receiver probe portion oriented in the circular waveguide orthogonal to the axis of said circular wave-guide for receiving one polarization of the incident signal, a launch. probe portion concentric with the insulator rod and extending into the first waveguide for launching said signal therein, and a transmission line portion, having a first section contoured to the inside surface of the circular wall, and substantially pa~allel to the axis, of the circular waveguide, and h.av~ng a second section con-toured to th.e inside surface, and substantially parallel to the plane, of the rear wall of the circular waveguide, for connecting the receiver probe portion to the launch.
pro~e portion.
DESCRIP~:CON OF THE: DRA~NGS
.
Figure 1 is a cross-sectional view-of a prior art waveguide assembly with An internal rotating signal detector, Fig. 2 is a cross-sectio.nal view of a waveguide ~:2S6S~L7 assembly with internal rotati.ng signal detector constructed according to t~e pxinciples of th.e present invention.
Figure 3 ~s a cross-sectional ~iew of the waveguide assem~ly and internal rotating signal detector of Figure 2 further including a feed Horn.
DESCRIPTION OF THE pRE~ERRED E~BOD~MENT
~ .
Referring first to Figure 1, prior art mechanical internal rotating signal receivers provided low impedance coaxial transmission line through the back of the circular waveguide at 6 to LP portion 7. However, RP portion 5 of transmission line 4 presents an incorrect impedance to the incident signal, because the energy is coupled from the high impedance end of RP portion 5 ~y transmission line portion 9 and the low i~pedance end of RP portion 5 is open circuited. Thus, the trans~ission line and RP portion impedances present in thi.s configuration are reversed for ef~ectiye detection of ~n incident waVe.
Referring now to Figu~e 2, one embodiment of the present inve.ntion comprises circular waveguide 10 perpen-dicularly coupled to rec-tangular wave~uide 22 and including signal conductor 12 fixedly mounted in insulator 20.
Signal conductor 12 includes RP portion 13 oriented orthogonal to the axis of symmetxy of circular wavegu~de lQ, LP portion 18 extending into, and orthogonal to the axis of, waveguide 22, and coupled to RP portion 13 by conductor portions 16. Signal. conductor 12 is typically constructed of a single, continuous h.omogenous electrical ~:2S~5~
conductor ~herein RP pOrtiQn 13 is approximately one-quarter wavelength long and transmission line portions 16 form a transmission line in the same manner that any single wire a~ove a ground plane ~ecomes a transmission line. The portion of signal conductor 12, extending through the rear ~all of round waveguide la at 6, forms a low impedance coaxial transmission line. LP portion 18 launches the detected signal into rectangular waveguide 22.
Insulator 20, const~ucted of polystyrene or other suita~le dielectric xod, provides mounting for signal conductor 12, electrical insulation of the line from the walls of waveguides la and 22, and for selective rotation of signal conductor 12 a~out its axis of symmetry. Since signal conductor 12 is concentric with axis of rotation of insulatQr 2Q, rotation of insulator 20 about its axis rotates LP portion 18, which correspondingly rotates RP
portion 13 orthogonally a~out the axis of symmetry of wave-guide 10. RP portion 13 is there~y oriented to the polar-ity-of the desired incident signal for detection.
The preferred em~odiment of the present invention is shown in Figure 3. In this configuration, circular waveguide la is coaxially coupled to feed horn 8 at one end and perpendicularly coupled to rectangular waveguide 22 at the other end. ~s ~n the con~iguration of Figure 3, signal conducto~ 12 is coupled to insulator 20, which is coupled to servo moto~ 17 for positioning~ Servo motor 17 is usually the same as or similar to servo motors used ~2565~
in remotely controlled model aircraft for control surface movement. O~viously, w~ith. th.e addition of ser~o motor 17, operation of th.e detector system may ~e remotely controlled from the operatorls control pane].~ Feed horn 8 may be of the type descri~ed in Canadian Patent Application Serial No. 405,814, flled 3une 23, 1982.
The directionof signal$ transmitted in waveguide 22 is orth.ogonal to the direction of si.gnals transmitted in waveguide lQ. This configuration facilitates the simplicity of th.e present invention, since launching of signals into ~aveguide 22 is insensitive to rotation of LP
portion 18, which rotation directly results from rotation of RP portion 13 necessary- to select the desired signal.
LP portion 18 is capa~le of launching tne detected signal into another waveguide of any shape or into coaxial cable transmission line. Thus, as th.e transmission line 12 rotates, RP portion 13 rotates orthogonally to, and LP
portian 18 rotates concentr~cally with. the axis of symmetry of the round ~aveguide. As the RP portion aligns with the desired linearly polarized signal present in the circular ~aveguide, the signal is detected and conducted along the transmission line to th.e LP portion, which.
launches the detected s~gnal. As stated earlier in this specification, the launched s~gnal or th.e signal received at the LNA (not shown) is unaffected ~y the orientation of RP portion 13 because LP porti.on 18 rotates about ~ts axis of symmetry and such rotation retains the relative position of LP portion 18 with waveguide 22.
Claims (23)
1. A polarized signal receiver comprising:
a first waveguide for transmitting polarized signals;
a circular waveguide for receiving polarized signals at one end and coupled to the first waveguide at the other end, said other end having a rear wall;
an insulator rod, rotatably mounted through said other end of the circular waveguide; and signal conducting means, fixedly mounted in the insulator rod concentric with the axis of rotation thereof having a receiver probe portion oriented in the circular waveguide orthogonal to the axis of said circular waveguide for receiving one polarization of the incident signal, a launch probe portion concentric with the insulator rod and extending into the first waveguide for launching said signal therein, and a transmission line portion, having a first section contoured to the inside surface of the circular wall, and substantially parallel to the axis, of the circular waveguide, and having a second section contoured to the inside surface, and substantially parallel to the plane, of the rear wall of the circular waveguide, for connecting the receiver probe portion to the launch probe portion.
a first waveguide for transmitting polarized signals;
a circular waveguide for receiving polarized signals at one end and coupled to the first waveguide at the other end, said other end having a rear wall;
an insulator rod, rotatably mounted through said other end of the circular waveguide; and signal conducting means, fixedly mounted in the insulator rod concentric with the axis of rotation thereof having a receiver probe portion oriented in the circular waveguide orthogonal to the axis of said circular waveguide for receiving one polarization of the incident signal, a launch probe portion concentric with the insulator rod and extending into the first waveguide for launching said signal therein, and a transmission line portion, having a first section contoured to the inside surface of the circular wall, and substantially parallel to the axis, of the circular waveguide, and having a second section contoured to the inside surface, and substantially parallel to the plane, of the rear wall of the circular waveguide, for connecting the receiver probe portion to the launch probe portion.
2. A polarized signal receiver as in claim 1 further including a feed horn for receiving incident polarized signals, coaxially coupled to said one end of the circular waveguide.
3. A polarized signal receiver as in claim 1 further including remotely controllable motor means coupled to the insulator rod for selectively rotating the signal conduct-ing means mounted therein.
4. A polarized signal receiver as in claim 1 or 2 wherein the inside surfaces of the rear and circular walls of the circular waveguide form waveguide walls and the ground plane element of the transmission line portion.
5. A polarized signal receiver as in claim 1 or 2 wherein the launch probe is orthogonal to the direction of signal transmission in the first waveguide.
6. A polarized signal receiver as in claim 1 or 2 wherein the first waveguide is a rectangular waveguide.
7. A polarized signal receiver as in claim 1 or 2 wherein the first waveguide is a circular waveguide.
8. A polarized signal receiver as in claim 1 or 2 wherein the first waveguide is a square waveguide.
9. A polarized signal receiver as in claim 1 or 2 wherein the first waveguide is an elliptical waveguide.
10. A polarized signal receiver as in claim 1 or 2 wherein the signal conducting means is a single continuous electrical conductor.
11. A polarized signal receiver as in claim 1 or 3 wherein the receiver probe portion is approximately one-quarter wavelength long.
12. A polarized signal receiver as in claim 1 or 3 wherein the signal conducting means is selectably rotatable to orient the receiver probe for receiving different polarizations of incident signals.
13. A polarized signal receiver as in claim 1 or 3 wherein the signal conducting means is selectably rotatable to orient the receiver probe for receiving different polarizations of incident signals and wherein the impedance of the launch probe and transmission line portions is substantially unaffected by the orientation of the receiver probe portion around the axis of the circuilar waveguide.
14. A polarized signal receiver as in claim 1 wherein the first and second sections of the transmission line portion and the launch probe portion all have substantially uniform impedance at the frequency of the signal received.
15. A polarized signal receiver as in claim 1 wherein said first section of the transmission line portion is generally parallel to the axis and near the surface of the circular wall of the circular waveguide, and said second section of the transmission line portion is generally parallel to the plane, and near the surface, of the rear wall of the circular waveguide, said circular waveguide walls forming the ground plane of said transmission line portion.
16. A polarized signal receiver comprising:
first and second waveguides adapted to enable propagation therein along their respective longitudinal axes of signals comprised of polarized electric fields within a predetermined range of frequencies;
a launch probe in said first waveguide and a receiver probe in said second waveguide, each said probe oriented substantially normal to the direction of propagation of the signal comprised of the electric field in the respective waveguide; and a conductive element interconnecting said probes and entering said second waveguide in one direction through a point of entry surrounded by a first interior wall surface, said first interior wall surface facing in said one direction, said conductive element having a first portion displaced laterally from said point of entry to overlie said first interior wall surface and extending toward a second interior wall surface than to said point of entry, said conducting element having a second portion overlying said second interior wall surface, said second interior wall surface facing inwardly of said second waveguide in a direction different than said one direction, said conductive element cooperating with each of said interior wall surfaces as the ground plane therefor such that said conductive element and said interior wall surfaces constitute a single wire above a ground plane transmission line within said second waveguide for said predetermined range of frequencies.
first and second waveguides adapted to enable propagation therein along their respective longitudinal axes of signals comprised of polarized electric fields within a predetermined range of frequencies;
a launch probe in said first waveguide and a receiver probe in said second waveguide, each said probe oriented substantially normal to the direction of propagation of the signal comprised of the electric field in the respective waveguide; and a conductive element interconnecting said probes and entering said second waveguide in one direction through a point of entry surrounded by a first interior wall surface, said first interior wall surface facing in said one direction, said conductive element having a first portion displaced laterally from said point of entry to overlie said first interior wall surface and extending toward a second interior wall surface than to said point of entry, said conducting element having a second portion overlying said second interior wall surface, said second interior wall surface facing inwardly of said second waveguide in a direction different than said one direction, said conductive element cooperating with each of said interior wall surfaces as the ground plane therefor such that said conductive element and said interior wall surfaces constitute a single wire above a ground plane transmission line within said second waveguide for said predetermined range of frequencies.
17. The polarized signal receiver of claim 16 in which said second portion of said conductive element extends generally in the direction of the longitudinal axis of said second waveguide and conductively couples said first portion and said receiver probe.
18. The polarized signal receiver of claim 16 in which said first interior wall surface comprises an end wall of said second waveguide and said second interior wall surface comprises a sidewall of said second waveguide, said point of entry for said conductive element being substantially the center of said end wall.
19. The polarized signal receiver of claim 16 in which said conductive element and said probes are rotatable.
20. The polarized signal receiver of claim 16 in which said probes are arranged in a plane containing the longitudinal axis of said second waveguide.
21. The polarized signal receiver of claim 16 in which said receiver probe is open circuited and terminates in proximity to said longitudinal axis of said second waveguide.
22. The polarized signal receiver of claim 16 in which the length of said first portion of said conductive element is substantially equal to the length of said receiver probe.
23. A polarized signal receiver comprising:
first and second waveguides adapted to enable propagation therein along their respective longitudinal axes of signals comprised of polarized electric fields, said second waveguide having an end wall and a sidewall;
a launch probe in said first waveguide and a receiver probe in said second waveguide, each of said probes oriented substantially normal to the direction of propagation of the signal comprised of the polarized electric field in its corresponding waveguide; and a conductive element passing through said end wall and interconnecting said probes, said element being displaced toward said side wall and having a first section which overlies said end wall and a second section which is coupled to said first section at a point closer to said sidewall than to the longitudinal axis of said second waveguide, said second section extending over said side-wall generally in the direction of said longitudinal axis and conductively coupling said first section and said receiver probe so that said conductive element together with said end wall and sidewall acting as the ground plane for said conductive element constitute a single wire above a ground plane transmission line within said second waveguide.
first and second waveguides adapted to enable propagation therein along their respective longitudinal axes of signals comprised of polarized electric fields, said second waveguide having an end wall and a sidewall;
a launch probe in said first waveguide and a receiver probe in said second waveguide, each of said probes oriented substantially normal to the direction of propagation of the signal comprised of the polarized electric field in its corresponding waveguide; and a conductive element passing through said end wall and interconnecting said probes, said element being displaced toward said side wall and having a first section which overlies said end wall and a second section which is coupled to said first section at a point closer to said sidewall than to the longitudinal axis of said second waveguide, said second section extending over said side-wall generally in the direction of said longitudinal axis and conductively coupling said first section and said receiver probe so that said conductive element together with said end wall and sidewall acting as the ground plane for said conductive element constitute a single wire above a ground plane transmission line within said second waveguide.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US322,446 | 1981-11-18 | ||
| US06/322,446 US4414516A (en) | 1981-11-18 | 1981-11-18 | Polarized signal receiver system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1256517B true CA1256517B (en) | 1989-06-27 |
Family
ID=23254934
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000405815A Expired CA1169130A (en) | 1981-11-18 | 1982-06-23 | Polarized signal receiver system |
| CA000569136A Expired CA1256517B (en) | 1981-11-18 | 1988-06-09 | Polarized signal receiver system |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000405815A Expired CA1169130A (en) | 1981-11-18 | 1982-06-23 | Polarized signal receiver system |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4414516A (en) |
| CA (2) | CA1169130A (en) |
Families Citing this family (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4965825A (en) | 1981-11-03 | 1990-10-23 | The Personalized Mass Media Corporation | Signal processing apparatus and methods |
| US7831204B1 (en) | 1981-11-03 | 2010-11-09 | Personalized Media Communications, Llc | Signal processing apparatus and methods |
| USRE47642E1 (en) | 1981-11-03 | 2019-10-08 | Personalized Media Communications LLC | Signal processing apparatus and methods |
| US4544900A (en) * | 1981-11-18 | 1985-10-01 | Chaparral Communications, Inc. | Polarized signal receiver system |
| US4528528A (en) * | 1982-04-02 | 1985-07-09 | Boman Industries | Waveguide polarization coupling |
| US4504836A (en) * | 1982-06-01 | 1985-03-12 | Seavey Engineering Associates, Inc. | Antenna feeding with selectively controlled polarization |
| US4801946A (en) * | 1983-01-26 | 1989-01-31 | Mark Antenna Products, Inc. | Grid antenna |
| US4663634A (en) * | 1983-11-21 | 1987-05-05 | Epsco, Incorporated | Polarization converter within waveguide feed for dish reflector |
| US4758841A (en) * | 1984-06-15 | 1988-07-19 | Fay Grim | Polarized signal receiver probe |
| US4755828A (en) * | 1984-06-15 | 1988-07-05 | Fay Grim | Polarized signal receiver waveguides and probe |
| US4554553A (en) * | 1984-06-15 | 1985-11-19 | Fay Grim | Polarized signal receiver probe |
| US4574258A (en) * | 1984-08-27 | 1986-03-04 | M/A-Com, Inc. | Polarized signal receiving apparatus |
| FR2583597A1 (en) * | 1985-06-13 | 1986-12-19 | Alcatel Thomson Faisceaux | HYPERFREQUENCY PASSPORT FILTER IN EVANESCENT MODE |
| JPH0666707B2 (en) | 1985-10-21 | 1994-08-24 | ソニー株式会社 | Receiving machine |
| US4686491A (en) * | 1985-10-22 | 1987-08-11 | Chaparral Communications | Dual probe signal receiver |
| JPS6297401A (en) * | 1985-10-24 | 1987-05-06 | Shimada Phys & Chem Ind Co Ltd | Waveguide type linearly polarized wave changeover equipment |
| US4613836A (en) * | 1985-11-12 | 1986-09-23 | Westinghouse Electric Corp. | Device for switching between linear and circular polarization using rotation in an axis across a square waveguide |
| CA1262773A (en) * | 1985-12-25 | 1989-11-07 | Mitsuhiro Kusano | Horn antenna with a choke surface-wave structure on the outer surface thereof |
| US4734660A (en) * | 1986-05-23 | 1988-03-29 | Northern Satellite Corporation | Signal polarization rotator |
| US4740795A (en) * | 1986-05-28 | 1988-04-26 | Seavey Engineering Associates, Inc. | Dual frequency antenna feeding with coincident phase centers |
| US4821046A (en) * | 1986-08-21 | 1989-04-11 | Wilkes Brian J | Dual band feed system |
| US4885593A (en) * | 1986-09-18 | 1989-12-05 | Scientific-Atlanta, Inc. | Feeds for compact ranges |
| DE8628689U1 (en) * | 1986-10-28 | 1987-07-02 | Wirtschaftliche Satellitenempfangssysteme Gmbh, 6720 Speyer, De | |
| US4841261A (en) * | 1987-09-01 | 1989-06-20 | Augustin Eugene P | Microwave rotary junction with external rotary energy coupling |
| US5255003B1 (en) * | 1987-10-02 | 1995-05-16 | Antenna Downlink Inc | Multiple-frequency microwave feed assembly |
| US5109232A (en) * | 1990-02-20 | 1992-04-28 | Andrew Corporation | Dual frequency antenna feed with apertured channel |
| US5245353A (en) * | 1991-09-27 | 1993-09-14 | Gould Harry J | Dual waveguide probes extending through back wall |
| US5461394A (en) * | 1992-02-24 | 1995-10-24 | Chaparral Communications Inc. | Dual band signal receiver |
| US5463358A (en) * | 1993-09-21 | 1995-10-31 | Dunn; Daniel S. | Multiple channel microwave rotary polarizer |
| ITVI20050340A1 (en) * | 2005-12-20 | 2007-06-21 | Tekno System Spa | PROTECTIVE HOUSING FOR CAMERAS |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2548821A (en) * | 1946-04-30 | 1951-04-10 | Henry J Riblet | Horn radiator adapted to be fed by a coaxial line |
| US2742612A (en) * | 1950-10-24 | 1956-04-17 | Sperry Rand Corp | Mode transformer |
| US2880399A (en) * | 1952-10-20 | 1959-03-31 | Sperry Rand Corp | Amplitude modulator for microwaves |
| US3681714A (en) * | 1969-03-06 | 1972-08-01 | Tokyo Keiki Seizosho Co Ltd | Impedance transformers for microwave transmission lines |
| US4168504A (en) * | 1978-01-27 | 1979-09-18 | E-Systems, Inc. | Multimode dual frequency antenna feed horn |
-
1981
- 1981-11-18 US US06/322,446 patent/US4414516A/en not_active Ceased
-
1982
- 1982-06-23 CA CA000405815A patent/CA1169130A/en not_active Expired
-
1988
- 1988-06-09 CA CA000569136A patent/CA1256517B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US4414516A (en) | 1983-11-08 |
| CA1169130A (en) | 1984-06-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1256517B (en) | Polarized signal receiver system | |
| EP0350324B1 (en) | Waveguide coupling arrangement | |
| US5041840A (en) | Multiple frequency antenna feed | |
| US5448250A (en) | Laminar microstrip patch antenna | |
| US4149170A (en) | Multiport cable choke | |
| US4443802A (en) | Stripline fed hybrid slot antenna | |
| CA2202843C (en) | Feeder link antenna | |
| US5459441A (en) | Signal propagation using high performance dual probe | |
| CA1208719A (en) | Coaxial line to waveguide adapter | |
| CA1250045A (en) | Microwave plane antenna | |
| EP0458226B1 (en) | Orthomode transducer between a circular waveguide and a coaxial cable | |
| US6081170A (en) | Dual frequency primary radiator | |
| CA1236892A (en) | Polarized signal receiver probe | |
| US4544900A (en) | Polarized signal receiver system | |
| EP0518615B1 (en) | Wave guide to microstrip line mode transition apparatus | |
| USRE32835E (en) | Polarized signal receiver system | |
| US4503379A (en) | Rotation of microwave signal polarization using a twistable, serpentine-shaped filament | |
| US3019438A (en) | Antenna structure | |
| US4686491A (en) | Dual probe signal receiver | |
| US4342034A (en) | Radio frequency antenna with polarization changer and filter | |
| US4549310A (en) | Cross-polarization corrector for circular waveguide | |
| AU561753B2 (en) | Microwave variable attenuator | |
| CA2260394A1 (en) | Waveguide antenna | |
| KR200408690Y1 (en) | Light weight radar antenna for tracking | |
| JP2923930B2 (en) | Radar antenna equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NARE | Reissued | ||
| MKEX | Expiry |