CA2349128A1 - A wireless communication system using surface acoustic wave (saw) single-phase unidirectional transducer (spudt) techniques - Google Patents

A wireless communication system using surface acoustic wave (saw) single-phase unidirectional transducer (spudt) techniques Download PDF

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Publication number
CA2349128A1
CA2349128A1 CA002349128A CA2349128A CA2349128A1 CA 2349128 A1 CA2349128 A1 CA 2349128A1 CA 002349128 A CA002349128 A CA 002349128A CA 2349128 A CA2349128 A CA 2349128A CA 2349128 A1 CA2349128 A1 CA 2349128A1
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CA
Canada
Prior art keywords
saw
spudt
idt
communication system
type
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.)
Granted
Application number
CA002349128A
Other languages
French (fr)
Other versions
CA2349128C (en
Inventor
Peter J. Edmonson
Colin K. Campbell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BlackBerry Ltd
Original Assignee
Research in Motion Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Research in Motion Ltd filed Critical Research in Motion Ltd
Publication of CA2349128A1 publication Critical patent/CA2349128A1/en
Application granted granted Critical
Publication of CA2349128C publication Critical patent/CA2349128C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/30—Time-delay networks
    • H03H9/42—Time-delay networks using surface acoustic waves
    • H03H9/44—Frequency dependent delay lines, e.g. dispersive delay lines
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
    • G01S13/751—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal
    • G01S13/755—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal using delay lines, e.g. acoustic delay lines
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02637—Details concerning reflective or coupling arrays
    • H03H9/02685—Grating lines having particular arrangements
    • H03H9/0274—Intra-transducers grating lines
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
    • H03H9/14502—Surface acoustic wave [SAW] transducers for a particular purpose
    • H03H9/14505—Unidirectional SAW transducers

Abstract

SAW devices such as interdigital transducers (IDTs) have been widely used in RADAR applications and as filters. An IDT produces a SAW when excited by a single electrical pulse and can be fabricated to embody a code, which code provides for a passive autocorrelation of a SAW input to the IDT and thereby lends itself to further application as a signal generator in a communication device. However, conventional SAW
expanders and compressors typically have insertion losses greater than 20 dB, which can have a profound effect on an RF link budget in a communication system.
Insertion losses are drastically reduced by using a single phase unidirectional transducer (SPUDT-type) instead of a conventional IDT as a SAW expander/compressor. A SPUDT-type reflects SAW components which are lost in conventional IDT designs so that a stronger SAW is directed toward a transmission element. In a receiver, a SPUDT-type directs a stronger S,AW toward a compressor IDT. A communication system based on SPUDT-type techniques would be low-cost, low-power, small and simple alternative to known short range communications schemes, including for example the Bluetooth TM solution.
Operation of a SAW system at a frequency of 2.4 GHz is contemplated.
CA002349128A 2000-06-02 2001-05-28 A wireless communication system using surface acoustic wave (saw) single-phase unidirectional transducer (spudt) techniques Expired - Fee Related CA2349128C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US20915300P 2000-06-02 2000-06-02
US60/209,153 2000-06-02

Publications (2)

Publication Number Publication Date
CA2349128A1 true CA2349128A1 (en) 2001-12-02
CA2349128C CA2349128C (en) 2006-07-11

Family

ID=22777568

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002349128A Expired - Fee Related CA2349128C (en) 2000-06-02 2001-05-28 A wireless communication system using surface acoustic wave (saw) single-phase unidirectional transducer (spudt) techniques

Country Status (5)

Country Link
US (1) US6462698B2 (en)
EP (2) EP1901427B1 (en)
AT (2) ATE501550T1 (en)
CA (1) CA2349128C (en)
DE (2) DE60144203D1 (en)

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US6278442B1 (en) 1998-06-26 2001-08-21 Research In Motion Limited Hand-held electronic device with a keyboard optimized for use with the thumbs
US6489950B1 (en) 1998-06-26 2002-12-03 Research In Motion Limited Hand-held electronic device with auxiliary input device
US7705828B2 (en) 1998-06-26 2010-04-27 Research In Motion Limited Dual-mode mobile communication device
US6825794B2 (en) 2000-06-02 2004-11-30 Research In Motion Limited Wireless communication system using surface acoustic wave (SAW) second harmonic techniques
JP4478851B2 (en) * 2000-09-19 2010-06-09 耕司 戸田 Ultrasonic modem for digital communication
EP1684477B1 (en) 2001-06-18 2008-12-03 Research In Motion Limited System and method for managing message attachments
US20030016735A1 (en) * 2001-07-23 2003-01-23 Edmonson Peter J. Communication system for two-way exchange of information
US7084768B2 (en) * 2002-03-21 2006-08-01 Rf Saw Components, Inc. Anti-collision interrogation pulse focusing system for use with multiple surface acoustic wave identification tags and method of operation thereof
US6759789B2 (en) * 2002-10-18 2004-07-06 Rf Saw Components, Inc. Surface acoustic wave identification tag having an interdigital transducer adapted for code discrimination and methods of operation and manufacture thereof
JP2004260793A (en) * 2003-02-04 2004-09-16 Murata Mfg Co Ltd Surface acoustic wave filter
US6907787B2 (en) * 2003-04-30 2005-06-21 Honeywell International Inc. Surface acoustic wave pressure sensor with microstructure sensing elements
US7158763B2 (en) * 2003-05-02 2007-01-02 P. J. Edmonson Ltd. Multi-IDT SAW hybrid communication system
US7082835B2 (en) * 2003-06-18 2006-08-01 Honeywell International Inc. Pressure sensor apparatus and method
CN1864327B (en) * 2003-10-08 2010-12-01 射频表面声波元件公司 Surface acoustic wave device
US9097789B2 (en) * 2012-03-13 2015-08-04 Duke Loi Apparatus and method for electromagnetic wave structure modulation
KR102417610B1 (en) 2016-03-03 2022-07-07 삼성전자주식회사 Method and apparatus for reading code using short range mmwave radar

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US4247903A (en) * 1979-01-08 1981-01-27 United Technologies Corporation Monolithic isolated gate FET saw signal processor
US4746830A (en) 1986-03-14 1988-05-24 Holland William R Electronic surveillance and identification
US4749964A (en) * 1986-12-08 1988-06-07 R. F. Monolithics, Inc. Superregenerative detector having a saw device in the feedback circuit
JP3254779B2 (en) 1993-01-05 2002-02-12 株式会社村田製作所 Multi-electrode surface acoustic wave device
JP3484237B2 (en) * 1994-09-28 2004-01-06 日本碍子株式会社 Surface acoustic wave device
US5835990A (en) 1995-06-16 1998-11-10 Northern Telecom Limited Longitudinally coupled double mode surface wave resonators
US5831492A (en) * 1995-09-15 1998-11-03 Sawtek Inc. Weighted tapered spudt saw device
JPH09261121A (en) 1996-03-22 1997-10-03 Kazuo Tsubouchi Code division multiplex communication equipment
DE69724689T2 (en) 1996-04-02 2004-04-08 Matsushita Electric Industrial Co., Ltd., Kadoma Acoustic surface wave filter
DE19638370C2 (en) 1996-09-19 2001-06-13 Epcos Ag Surface wave filter for asymmetrical / symmetrical and symmetrical / symmetrical operation
FR2762458B1 (en) 1997-04-18 1999-07-09 Thomson Csf SURFACE ACOUSTIC WAVE DEVICE HAVING PROXIMITY COUPLING WITH DIFFERENTIAL INPUTS / OUTPUTS
US5896071A (en) * 1997-05-15 1999-04-20 Northern Telecom Limited Surface wave device balun resonator filters
DE19724258C2 (en) 1997-06-09 2002-10-10 Epcos Ag Dual-mode surface acoustic wave filters
DE19907640A1 (en) * 1998-03-25 1999-10-07 Dresden Ev Inst Festkoerper Surface acoustic wave device
JP2000036722A (en) * 1998-05-11 2000-02-02 Tdk Corp Designing method for surface acoustic wave device and the surface acoustic wave device
JP3291255B2 (en) * 1998-09-22 2002-06-10 日本碍子株式会社 Surface acoustic wave device
US6242844B1 (en) * 1999-12-28 2001-06-05 Cts Corporation Wide-band single-phase unidirectional transducer

Also Published As

Publication number Publication date
EP1160974B1 (en) 2008-01-02
EP1901427A1 (en) 2008-03-19
EP1160974A2 (en) 2001-12-05
ATE501550T1 (en) 2011-03-15
ATE382985T1 (en) 2008-01-15
DE60132131D1 (en) 2008-02-14
US20010053179A1 (en) 2001-12-20
US6462698B2 (en) 2002-10-08
EP1901427B1 (en) 2011-03-09
EP1160974A3 (en) 2002-02-20
DE60144203D1 (en) 2011-04-21
DE60132131T2 (en) 2008-12-11
CA2349128C (en) 2006-07-11

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Effective date: 20180528