|Publication number||US3560978 A|
|Publication date||Feb 2, 1971|
|Filing date||Nov 1, 1968|
|Priority date||Nov 1, 1968|
|Also published as||DE1953443A1, DE1953443B2, DE1953443C3|
|Publication number||US 3560978 A, US 3560978A, US-A-3560978, US3560978 A, US3560978A|
|Inventors||Sven H Dodington, Leon Himmel, Ernest G Parker|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (88), Classifications (18), Legal Events (1) |
|External Links: USPTO, USPTO Assignment, Espacenet|
Electronically controlled antenna system
US 3560978 A
Feb. 2, i971 l.. HIMMEL ETAL 3,560,973
ELECTRONICALLY CONTROLLED ANTENNA SYSTEM Filed Nov. l, 1968 2 Sheets-Sheet 1 /ATTORNEY mu @X95 0m Q qos SQQQW;
3,560,978 Patented Feb. 2, 1971 3,560,978 ELECTRONICALLY CONTROLLED ANTENNA SYSTEM Leon Himmel, Upper Montclair, Sven H. Dodington,
Mountain Lakes, and Ernest G. Parker, Convent Station, NJ., assignors to International Telephone and Telegraph Corporation, Nutley, NJ., a corporation of Delaware Filed Nov. 1, 1968, Ser. No. 772,686 Int. Cl. G01s 1/48 U.S. Cl. 343-106 3 Claims ABSTRACT F THE DISCLOSURE In a TACAN beacon antenna, a monopole radiator surrounded by two or more concentric circular arrays of parasitic elements, which elements are digitally inhibited in sequence in a predetermined manner, is used to produce a rotating radiation pattern capable of producing and 135 cycle-per-second signals at a receiver. Parasitic elements are inhibited by being open circuited by digitally controlled switching diodes. Recirculating shift registers are used to inhibit parasitic elements in the circular arrays to produce the required modulation radiation pattern. A common clock is used to step said registers along to produce the desired rotating pattern.
BACKGROUND OF THE INVENTION Field of the invention The present invention relates to an antenna system, and in particular, one which is capable of providing a rotating radiation pattern which can be used with TACAN systems.
Description of the prior art The tactical deployment of navigation equipment has introduced the requirement that system antennas should be readily transportable. Certain navigational systems, such as TACAN have heretofore used mechanically rotated antennas. Mechanically rotated antennas, although simple and reliable, are bulky, heavy and consume relatively large amounts of primary power.
While electronically rotated scanning antennas have recently come into being, in general, they have been large and weighty.
Accordingly, it is an object of this invention to provide an electronic scanning antenna, which can be made small and light.
SUMMARY OF THE INVENTION According to the invention, an antenna system comprises a radiator, a plurality of parasitic elements associated with said radiator, means coupled to each of said parasitic elements for inhibiting the operation thereof and control means for selectively operating said inhibiting means in a predetermined manner.
BRIEF DESCRIPTION OF THE DRAWINGS mee dipole parasitic elements and their associated grounding circuitry.
DESCRIPTION OF THE PREFERRED EMBODIMENTS In a first embodiment, as illustrated in FIG. 1, a central radiator 1, mounted on a counterpoise 4 is surrounded by two concentric rings, 2 and 3, of closely spaced parasitic monopole elements.
Each parasitic monopole element 5, is illustrated in FIG. 2 is coupled to the counterpoise 4 via a diode 8. A switching signal is applied to the diode via an R.F. isolating inductor 7. The switching signal controls the R.F. impedance between the parasitic monopole element 5 and the counterpoise 4 such as to be either an R.F. open circuit or effectively a short circuit to ground.
When an R.F. signal is applied to the monopole radiator 1 it radiates a signal which is modified by the parasitic elements 2 and 3, located as shown in FIG. 1, to produce a desired field pattern. The desired field pattern can be effectively created 0r modified by grounding selected parasitic elements.
A TACAN radiation pattern is a composite pattern comprising a single lobe of cardioid pattern, upon which is superimposed nine secondary variations or ripples. In the presently discussed antenna, selected parasitic elements in the innermost ring 2 are grounded to produce a cardioid field pattern and selected parasitic elements in the outermost ring 3 are grounded to produce the secondary variations in the desired field pattern.
With an appropriate static radiation pattern produced, as above described, it is possible to rotate the pattern by progressively grounding the parasitic elements around the array. This is accomplished as is schematically illustrated in FIG. l by coupling a master clock 11 to two programmed recirculating shift registers, the first of which has its separate bits coupled to the innermost ring of parasitic elements 2 and the second of which has its separate bits coupled to the outermost ring of parasitic elements 3.
The effective radiation pattern depends, for a given radiating frequency, upon the diameters of the concentric rings of parasitic elements. In a second embodiment, as illustrated in FIG. 3, in order to obtain an antenna operative over two frequency bands four concentric rings, two inner and two outer, are used. Rings 15 and 17 may be kept inoperative by appropriate switching circuits while rings 14 and 16 provide a rotating pattern or rings 15 and 17 can provide a pattern while rings 14 and 16 are inactive.
Up to this point, only parasitic monopole elements have been discussed, however, in a third embodiment, parasitic dipoles as shown in FIG. 4 are used to create the radiation pattern. In said embodiment dipole halves 18 are coupled to and separated by a diode 19 one end of which is D.C. coupled to ground via an R.F. choke coil 21 and the other end of which is coupled to a switching signal via R.F. choke coil 20. The switching signal causes the diode 19 to be either an R.F. open or R.F. short and thereby controls the radiation characteristics of the dipole halves.
In a fourth embodiment, as shown in FIG. 5, a stacking technique is used instead of a single parasitic element to obtain an improvement in vertical directivity. In this arrangement parasitic dipoles 24, 25, 26 are stacked one upon another, and are separately coupled to bi-lar R.F. chokes 22, 23 which provide a DC path for control switching signals.
1. An antenna system for providing a rotating radiation pattern, comprising:
a central radiator;
a first plurality of parasitic elements associated with 3 4 said radiator positioned to form a first concentric inductor grounded at one end, a plurality of diodes couarray around said radiator; pled to spaced points on said rst and second inductors, a second plurality of parasitic elements associated with said parasitic elements comprising dipole halves coupled said radiator positioned to form a second concentric to each of said diodes, and a control voltage source conarray; nected to one end of said rst inductor. means coupled to each of said parasitic elements of said 5 first and second arrays for inhibiting the operation References Cited a heeof; t Ol C0 l d to ,d rst a v UNITED STATES PATENTS rs con r means up e sai arr y 1a 1,860,123 5/1932 Yagi 343-837X means to produce a' rotatlng lobe pat Herzog a second control means coupled to said second array 3109175 10/1963 Lloyd 343-8335( via said inhibiting means for superimposing minor p 3136996 6/1964 Parker 343`106 lobes on said rotating lobe pattern. 3339205 8/1967 Smltka 343-701 2. An antenna system according7 to claim 1 wherein 15 3375519 3/1968 Burnham 343"100 said inhibiting means comprises a switching diode cou led from the parasitic element to ground, an R.F. chokeland RODNEY D' BENNETT JR Prlmary Examiner a voltage source coupled via said R.F. choke to bias said R. E. BERGER, Assistant Examiner diode on and off.
3. An antenna System according to claim 1 wherein 20 U.S. C1. X.R. said inhibiting means comprises a rst inductor, a Second 343-100, 833, 837
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3704463 *||Jun 2, 1970||Nov 28, 1972||Us Navy||Direction finding antenna system|
|US3710388 *||Aug 6, 1970||Jan 9, 1973||Raytheon Co||Radar scanning method and apparatus|
|US3725938 *||Oct 5, 1970||Apr 3, 1973||Sperry Rand Corp||Direction finder system|
|US3790942 *||May 25, 1972||Feb 5, 1974||Thomson Csf||Radio beacon with a rotating cardioid radiation pattern in particular for use in landing grounds of secondary importance|
|US3950753 *||Dec 13, 1973||Apr 13, 1976||Chisholm John P||Stepped cardioid bearing system|
|US3983561 *||Sep 2, 1975||Sep 28, 1976||Republic Electronic Industries, Inc.||High frequency wave radiation system producing a rotating beam defining a predetermined geometrical pattern|
|US4014024 *||Jun 15, 1973||Mar 22, 1977||International Telephone And Telegraph Corporation||Non-rotating antenna|
|US4260994 *||Nov 9, 1978||Apr 7, 1981||International Telephone And Telegraph Corporation||Antenna pattern synthesis and shaping|
|US4387378 *||Jun 9, 1981||Jun 7, 1983||Harris Corporation||Antenna having electrically positionable phase center|
|US4404563 *||Nov 12, 1980||Sep 13, 1983||Motorola, Inc.||System of directional antennas with means for reducing flutter|
|US4631546 *||Jan 14, 1985||Dec 23, 1986||Rockwell International Corporation||Electronically rotated antenna apparatus|
|US4700197 *||Mar 3, 1986||Oct 13, 1987||Canadian Patents & Development Ltd.||Adaptive array antenna|
|US4730192 *||Mar 21, 1985||Mar 8, 1988||International Standard Electric||Monitor for an electronic TACAN beacon|
|US4864320 *||May 6, 1988||Sep 5, 1989||Ball Corporation||Monopole/L-shaped parasitic elements for circularly/elliptically polarized wave transceiving|
|US5117217 *||Nov 7, 1990||May 26, 1992||Electronic Security Products Of California||Alarm system for sensing and vocally warning a person to step back from a protected object|
|US5235343 *||Aug 21, 1991||Aug 10, 1993||Societe D'etudes Et De Realisation De Protection Electronique Informatique Electronique||High frequency antenna with a variable directing radiation pattern|
|US5243358 *||Jan 11, 1993||Sep 7, 1993||Ball Corporation||Directional scanning circular phased array antenna|
|US5294939 *||Jan 11, 1993||Mar 15, 1994||Ball Corporation||Electronically reconfigurable antenna|
|US5315285 *||Apr 28, 1992||May 24, 1994||Electronic Security Products Of California, Inc.||Alarm system for sensing and vocally warning a person approaching a protected object|
|US5539419 *||Oct 4, 1995||Jul 23, 1996||Matsushita Electric Industrial Co., Ltd.||Antenna system for mobile communication|
|US5767807 *||Jun 5, 1996||Jun 16, 1998||International Business Machines Corporation||Communication system and methods utilizing a reactively controlled directive array|
|US6034638 *||May 20, 1994||Mar 7, 2000||Griffith University||Antennas for use in portable communications devices|
|US6288682||Dec 22, 1999||Sep 11, 2001||Griffith University||Directional antenna assembly|
|US6337668 *||Feb 28, 2000||Jan 8, 2002||Matsushita Electric Industrial Co., Ltd.||Antenna apparatus|
|US6407719||Jul 6, 2000||Jun 18, 2002||Atr Adaptive Communications Research Laboratories||Array antenna|
|US6473036||Feb 2, 2001||Oct 29, 2002||Tantivy Communications, Inc.||Method and apparatus for adapting antenna array to reduce adaptation time while increasing array performance|
|US6492942||Nov 7, 2000||Dec 10, 2002||Com Dev International, Inc.||Content-based adaptive parasitic array antenna system|
|US6515635||May 1, 2001||Feb 4, 2003||Tantivy Communications, Inc.||Adaptive antenna for use in wireless communication systems|
|US6545646 *||Jul 16, 2001||Apr 8, 2003||Xerox Corporation||Integrated dipole detector for microwave imaging|
|US6600456||May 16, 2001||Jul 29, 2003||Tantivy Communications, Inc.||Adaptive antenna for use in wireless communication systems|
|US6606057 *||Apr 30, 2001||Aug 12, 2003||Tantivy Communications, Inc.||High gain planar scanned antenna array|
|US6864852||May 23, 2003||Mar 8, 2005||Ipr Licensing, Inc.||High gain antenna for wireless applications|
|US6876337||Jul 29, 2002||Apr 5, 2005||Toyon Research Corporation||Small controlled parasitic antenna system and method for controlling same to optimally improve signal quality|
|US6972729||Mar 29, 2004||Dec 6, 2005||Wang Electro-Opto Corporation||Broadband/multi-band circular array antenna|
|US6987493||Apr 14, 2003||Jan 17, 2006||Paratek Microwave, Inc.||Electronically steerable passive array antenna|
|US6989797||Dec 23, 2003||Jan 24, 2006||Ipr Licensing, Inc.||Adaptive antenna for use in wireless communication systems|
|US7009559||Aug 10, 2004||Mar 7, 2006||Ipr Licensing, Inc.||Method and apparatus for adapting antenna array using received predetermined signal|
|US7031652||Feb 5, 2001||Apr 18, 2006||Soma Networks, Inc.||Wireless local loop antenna|
|US7068234||Mar 2, 2004||Jun 27, 2006||Hrl Laboratories, Llc||Meta-element antenna and array|
|US7071888||Mar 2, 2004||Jul 4, 2006||Hrl Laboratories, Llc||Steerable leaky wave antenna capable of both forward and backward radiation|
|US7079081 *||Jul 14, 2003||Jul 18, 2006||Harris Corporation||Slotted cylinder antenna|
|US7088306||Feb 22, 2005||Aug 8, 2006||Ipr Licensing, Inc.||High gain antenna for wireless applications|
|US7154451||Sep 17, 2004||Dec 26, 2006||Hrl Laboratories, Llc||Large aperture rectenna based on planar lens structures|
|US7164387||Apr 30, 2004||Jan 16, 2007||Hrl Laboratories, Llc||Compact tunable antenna|
|US7176844 *||Apr 11, 2005||Feb 13, 2007||Ipr Licensing, Inc.||Aperiodic array antenna|
|US7193561||Jul 30, 2004||Mar 20, 2007||Eads Deutschland Gmbh||Phase controlled antennae for data transmission between mobile devices|
|US7215297||Jan 17, 2006||May 8, 2007||Ipr Licensing, Inc.||Adaptive antenna for use in wireless communication systems|
|US7245269||May 11, 2004||Jul 17, 2007||Hrl Laboratories, Llc||Adaptive beam forming antenna system using a tunable impedance surface|
|US7253699||Feb 24, 2004||Aug 7, 2007||Hrl Laboratories, Llc||RF MEMS switch with integrated impedance matching structure|
|US7276990||Nov 14, 2003||Oct 2, 2007||Hrl Laboratories, Llc||Single-pole multi-throw switch having low parasitic reactance, and an antenna incorporating the same|
|US7298228||May 12, 2003||Nov 20, 2007||Hrl Laboratories, Llc||Single-pole multi-throw switch having low parasitic reactance, and an antenna incorporating the same|
|US7307589||Dec 29, 2005||Dec 11, 2007||Hrl Laboratories, Llc||Large-scale adaptive surface sensor arrays|
|US7398049||Feb 16, 2006||Jul 8, 2008||Soma Networks, Inc.||Wireless local loop antenna|
|US7453413||Nov 24, 2003||Nov 18, 2008||Toyon Research Corporation||Reconfigurable parasitic control for antenna arrays and subarrays|
|US7456803||Nov 7, 2006||Nov 25, 2008||Hrl Laboratories, Llc||Large aperture rectenna based on planar lens structures|
|US7463201||Feb 13, 2007||Dec 9, 2008||Interdigital Corporation||Aperiodic array antenna|
|US7482993||Jun 20, 2008||Jan 27, 2009||Panasonic Corporation||Variable-directivity antenna|
|US7528789||May 8, 2007||May 5, 2009||Ipr Licensing, Inc.||Adaptive antenna for use in wireless communication systems|
|US7636070||Nov 26, 2004||Dec 22, 2009||Centre National De La Recherche Scientifique||Configurable and orientable antenna and corresponding base station|
|US7746830||Jul 18, 2005||Jun 29, 2010||Interdigital Technology Corporation||System and method for maintaining wireless channels over a reverse link of a CDMA wireless communication system|
|US7773566||Jul 21, 2004||Aug 10, 2010||Tantivy Communications, Inc.||System and method for maintaining timing of synchronization messages over a reverse link of a CDMA wireless communication system|
|US7868829||Mar 21, 2008||Jan 11, 2011||Hrl Laboratories, Llc||Reflectarray|
|US7936728||Nov 29, 2001||May 3, 2011||Tantivy Communications, Inc.||System and method for maintaining timing of synchronization messages over a reverse link of a CDMA wireless communication system|
|US8063847 *||Aug 6, 2008||Nov 22, 2011||Pctel, Inc.||Multi-band antenna|
|US8121533||Jun 6, 2008||Feb 21, 2012||Wi-Lan, Inc.||Wireless local loop antenna|
|US8134980||May 22, 2007||Mar 13, 2012||Ipr Licensing, Inc.||Transmittal of heartbeat signal at a lower level than heartbeat request|
|US8139546||Apr 27, 2010||Mar 20, 2012||Ipr Licensing, Inc.||System and method for maintaining wireless channels over a reverse link of a CDMA wireless communication system|
|US8155096||Nov 30, 2001||Apr 10, 2012||Ipr Licensing Inc.||Antenna control system and method|
|US8175120||Feb 7, 2001||May 8, 2012||Ipr Licensing, Inc.||Minimal maintenance link to support synchronization|
|US8274954||Mar 10, 2009||Sep 25, 2012||Ipr Licensing, Inc.||Alternate channel for carrying selected message types|
|US8369277||Mar 13, 2012||Feb 5, 2013||Intel Corporation||Signaling for wireless communications|
|US8421684||Oct 1, 2009||Apr 16, 2013||Qualcomm Incorporated||Methods and apparatus for beam steering using steerable beam antennas with switched parasitic elements|
|US8436785||Nov 3, 2010||May 7, 2013||Hrl Laboratories, Llc||Electrically tunable surface impedance structure with suppressed backward wave|
|US8437330||Apr 9, 2012||May 7, 2013||Intel Corporation||Antenna control system and method|
|US8509268||Dec 22, 2011||Aug 13, 2013||Intel Corporation||Minimal maintenance link to support sychronization|
|US8525748 *||Jul 8, 2009||Sep 3, 2013||Panasonic Corporation||Variable directivity antenna apparatus provided with antenna elements and at least one parasitic element connected to ground via controlled switch|
|US8638877||Nov 29, 2011||Jan 28, 2014||Intel Corporation||Methods, apparatuses and systems for selective transmission of traffic data using orthogonal sequences|
|US8687606||Aug 10, 2012||Apr 1, 2014||Intel Corporation||Alternate channel for carrying selected message types|
|US20110102287 *||Jul 8, 2009||May 5, 2011||Wataru Noguchi||Variable directivity antenna apparatus provided with antenna elements and at least one parasitic element connected to ground via controlled switch|
|DE2726956A1 *||Jun 15, 1977||Dec 22, 1977||Hoffman Electronics Corp||Antennensystem|
|EP0172626A1 *||Jun 26, 1985||Feb 26, 1986||Canadian Patents and Development Limited||Adaptive array antenna|
|EP0340404A2 *||Feb 28, 1989||Nov 8, 1989||Ball Corporation||Monopole/L-shaped parasitic elements for circularly/eliptically polazized wave transceiving|
|EP0473497A1 *||Aug 21, 1991||Mar 4, 1992||Societe D'etudes Et De Realisation De Protection Electronique Informatique Electronique Securite Maritime S.E.R.P.E.-I.E.S.M.||Antenna device for radiation and reception of high-frequency waves|
|EP1355377A2 *||Apr 15, 2003||Oct 22, 2003||Paratek Microwave, Inc.||Electronically steerable passive array antenna|
|WO1982004503A1 *||Jun 9, 1982||Dec 23, 1982||Harris Corp||Antenna having electrically positionable phase center|
|WO2004107497A2 *||May 18, 2004||Dec 9, 2004||Ipr Licensing Inc||High gain antenna for wireless applications|
|WO2005055365A1||Nov 26, 2004||Jun 16, 2005||Centre Nat Rech Scient||Configurable and orientable antenna and corresponding base station|
|WO2011053431A1 *||Oct 1, 2010||May 5, 2011||Qualcomm Incorporated||Methods and apparatus for beam steering using steerable beam antennas with switched parasitic elements|
| || |
|U.S. Classification||342/399, 343/837, 343/833|
|International Classification||G01S1/48, H01Q3/44, H01Q19/28, H01Q23/00, G01S19/11, G01S19/17, G01S19/46, G01S19/04, G01S19/40|
|Cooperative Classification||H01Q3/446, H01Q19/28, G01S1/02|
|European Classification||G01S1/02, H01Q19/28, H01Q3/44C|
|Apr 22, 1985||AS||Assignment|
Owner name: ITT CORPORATION
Free format text: CHANGE OF NAME;ASSIGNOR:INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION;REEL/FRAME:004389/0606
Effective date: 19831122