GB984581A - Improvements in or relating to interrogator-responder signalling systems - Google Patents
Improvements in or relating to interrogator-responder signalling systemsInfo
- Publication number
- GB984581A GB984581A GB9690/61A GB969061A GB984581A GB 984581 A GB984581 A GB 984581A GB 9690/61 A GB9690/61 A GB 9690/61A GB 969061 A GB969061 A GB 969061A GB 984581 A GB984581 A GB 984581A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- interrogator
- oscillator
- response
- responder
- 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
- 230000011664 signaling Effects 0.000 title 1
- 239000003990 capacitor Substances 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 238000010079 rubber tapping Methods 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D1/00—Demodulation of amplitude-modulated oscillations
- H03D1/22—Homodyne or synchrodyne circuits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
- B61L25/02—Indicating or recording positions or identities of vehicles or trains
- B61L25/04—Indicating or recording train identities
-
- 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
- G01S13/758—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 a signal generator powered by the interrogation signal
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Near-Field Transmission Systems (AREA)
- Radar Systems Or Details Thereof (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15859A US3172101A (en) | 1960-03-18 | 1960-03-18 | Coherent signalling system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB984581A true GB984581A (en) | 1965-02-24 |
Family
ID=21774044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9690/61A Expired GB984581A (en) | 1960-03-18 | 1961-03-16 | Improvements in or relating to interrogator-responder signalling systems |
Country Status (5)
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4481428A (en) * | 1981-05-19 | 1984-11-06 | Security Tag Systems, Inc. | Batteryless, portable, frequency divider useful as a transponder of electromagnetic radiation |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3806905A (en) * | 1971-09-08 | 1974-04-23 | Sperry Rand Corp | Transducer and condition monitor |
US4117481A (en) * | 1972-05-30 | 1978-09-26 | James Nickolas Constant | Sidelooking radar and system for identifying objects |
US4314373A (en) * | 1976-05-24 | 1982-02-02 | Harris Corporation | Passive transmitter including parametric device |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA545294A (en) * | 1957-08-27 | Guanella Gustav | Frequency modulated repeater for radio links | |
US2421106A (en) * | 1943-01-21 | 1947-05-27 | Gen Railway Signal Co | Airway traffic control system |
US2851592A (en) * | 1952-12-03 | 1958-09-09 | Rca Corp | Carrier wave powered radio transceiver circuits |
-
1960
- 1960-03-18 JP JP96656060A patent/JPS3813707B1/ja active Pending
- 1960-03-18 US US15859A patent/US3172101A/en not_active Expired - Lifetime
-
1961
- 1961-03-15 DE DE19611416101 patent/DE1416101B2/de active Pending
- 1961-03-16 GB GB9690/61A patent/GB984581A/en not_active Expired
- 1961-03-17 CH CH321761A patent/CH393988A/de unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4481428A (en) * | 1981-05-19 | 1984-11-06 | Security Tag Systems, Inc. | Batteryless, portable, frequency divider useful as a transponder of electromagnetic radiation |
Also Published As
Publication number | Publication date |
---|---|
DE1416101A1 (de) | 1968-10-03 |
US3172101A (en) | 1965-03-02 |
CH393988A (de) | 1965-06-15 |
JPS3813707B1 (US07922777-20110412-C00004.png) | 1963-07-31 |
DE1416101B2 (de) | 1971-05-06 |
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