GB1262611A - Signal processing apparatus and method - Google Patents

Signal processing apparatus and method

Info

Publication number
GB1262611A
GB1262611A GB01381/70A GB1138170A GB1262611A GB 1262611 A GB1262611 A GB 1262611A GB 01381/70 A GB01381/70 A GB 01381/70A GB 1138170 A GB1138170 A GB 1138170A GB 1262611 A GB1262611 A GB 1262611A
Authority
GB
United Kingdom
Prior art keywords
wave
generator
pulse
transducer
shear
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
Application number
GB01381/70A
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.)
CHU ASSOCIATES
Original Assignee
CHU ASSOCIATES
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 CHU ASSOCIATES filed Critical CHU ASSOCIATES
Publication of GB1262611A publication Critical patent/GB1262611A/en
Expired legal-status Critical Current

Links

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
    • H03H9/40—Frequency dependent delay lines, e.g. dispersive delay lines

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

1,262,611. Electromechanical delay devices. CHU ASSOCIATES Inc. 10 March, 1970 [6 Oct., 1969], No. 11381/70. Heading H3U. A device for compressing a frequencymodulated input pulse, e.g. in "chirp" radar, comprises a single-crystal rod 1<SP>1</SP> of YIG disposed in a cylindrical hole extending through a sphere 1 of polycrystalline YIG. The optically flat end faces of the rod 1<SP>1</SP> carry, respectively, an input shear-wave electrostrictive transducer 2 and an output longitudinal-wave electrostrictive transducer 4. The sphere 1 is uniformly wound with a solenoid coil 3 energized by a ramp generator 5, the entire structure being magnetized to saturation by a permanent or electromagnet N-S. The current I supplied by generator 5 has the waveform shown to produce a substantially uniform spatial magnetic field which varies in time. The generator 5 is turned on for each successive chirp pulse applied to the transducer 2 whereby at a certain value of the generator current I the magnetic field causes conversion of the elastic shear-wave to a spin wave and then to an elastic longitudinal-wave. The high-frequency components of the input pulse are delayed in the rod 1<SP>1</SP> more than the lowfrequency components whereby a compressed pulse is generated at the output transducer 4. Moreover, since the ratio of the propagation velocities of the longitudinal waves and shear waves is about two to one, the pulse compression factor is improved by a factor of about two.
GB01381/70A 1969-10-06 1970-03-10 Signal processing apparatus and method Expired GB1262611A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87047869A 1969-10-06 1969-10-06

Publications (1)

Publication Number Publication Date
GB1262611A true GB1262611A (en) 1972-02-02

Family

ID=25355468

Family Applications (1)

Application Number Title Priority Date Filing Date
GB01381/70A Expired GB1262611A (en) 1969-10-06 1970-03-10 Signal processing apparatus and method

Country Status (10)

Country Link
US (1) US3668568A (en)
JP (1) JPS4942279B1 (en)
BE (1) BE747570A (en)
BR (1) BR7019227D0 (en)
CA (1) CA925964A (en)
DE (1) DE2045502A1 (en)
FR (1) FR2065851A5 (en)
GB (1) GB1262611A (en)
IL (1) IL33964A (en)
SE (1) SE357832B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753165A (en) * 1971-12-27 1973-08-14 Chu Associates Tunable variable bandwidth magneto-elastic filter and method
US3753163A (en) * 1971-12-27 1973-08-14 Chu Associates Electromagnetic wave-elastic wave transducer and method
US4096461A (en) * 1974-08-23 1978-06-20 U.S. Philips Corporation Magnet system for tunable YIG oscillator and tunable YIG filter
FR2295634A1 (en) * 1974-12-17 1976-07-16 Thomson Csf ELASTIC WAVE CONVOLUTION DEVICE
JPS52576U (en) * 1975-06-16 1977-01-05
JPS5399748A (en) * 1977-02-10 1978-08-31 Sony Corp Variable delay line
US4758795A (en) * 1986-07-01 1988-07-19 The United States Of America As Represented By The Secretary Of The Navy Microwave pulse compression in dispersive plasmas

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3249882A (en) * 1962-12-17 1966-05-03 Gen Electric Spin and phonon spin traveling wave parametric amplifiers and spin wave delay lines
JPS5246063B1 (en) * 1963-11-07 1977-11-21
US3353118A (en) * 1964-05-19 1967-11-14 Teledyne Inc Magnetostatic wave variable delay apparatus
US3444484A (en) * 1967-04-03 1969-05-13 Raytheon Co Solid state delay line for propagation of microwave frequency energy in spin wave mode

Also Published As

Publication number Publication date
SE357832B (en) 1973-07-09
BR7019227D0 (en) 1973-03-15
CA925964A (en) 1973-05-08
BE747570A (en) 1970-08-31
FR2065851A5 (en) 1971-08-06
DE2045502A1 (en) 1971-04-15
IL33964A (en) 1973-08-29
IL33964A0 (en) 1970-04-20
US3668568A (en) 1972-06-06
JPS4942279B1 (en) 1974-11-14

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