GB1179471A - A Radar Responder the Transmission Frequency of which is in Fixed Relationship with respect to the Interrogating Frequency - Google Patents
A Radar Responder the Transmission Frequency of which is in Fixed Relationship with respect to the Interrogating FrequencyInfo
- Publication number
- GB1179471A GB1179471A GB373167A GB373167A GB1179471A GB 1179471 A GB1179471 A GB 1179471A GB 373167 A GB373167 A GB 373167A GB 373167 A GB373167 A GB 373167A GB 1179471 A GB1179471 A GB 1179471A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- supplied
- local oscillator
- interrogating
- respect
- 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
Classifications
-
- 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
- G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
- G01S13/767—Responders; Transponders
Abstract
1,179,471. Transponders. SELENIA INDUSTRIE ELETTRONICHE ASSOCIATE S.p.A. 25 Jan., 1967 [25 Jan., 1966], No. 3731/67. Heading H4L. In a transponder which may be mounted on a missile, the transmitter is controlled by the local oscillator of the receiver. As shown in Fig. 2, pulses from a radar transmitter are received at 10 and supplied to a mixer 11 together with an output from a local oscillator 12, the resulting I.F. signal being amplified at 13, detected at 14, amplified at 15, and supplied via a gate 16 which is stated to discriminate the pulse from noise, to an output circuit. The local oscillator 12 is controlled by an A.F.C. circuit 17 to maintain the I.F. constant. The pulse from gate 16 together with an output from oscillator 12 is supplied to a modulator 18 so that pulses are transmitted via aerial 19 at the frequency of the local oscillator and having the same duration as the interrogating pulse. The modulator 18 may be supplied with data signals to be transmitted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT156166 | 1966-01-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1179471A true GB1179471A (en) | 1970-01-28 |
Family
ID=11101783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB373167A Expired GB1179471A (en) | 1966-01-25 | 1967-01-25 | A Radar Responder the Transmission Frequency of which is in Fixed Relationship with respect to the Interrogating Frequency |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR1508843A (en) |
| GB (1) | GB1179471A (en) |
| NL (1) | NL6701200A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018087770A1 (en) | 2016-11-14 | 2018-05-17 | Elta Systems Ltd. | Methods and systems for detecting and/or tracking a projectile |
-
1967
- 1967-01-24 FR FR92308A patent/FR1508843A/en not_active Expired
- 1967-01-25 GB GB373167A patent/GB1179471A/en not_active Expired
- 1967-01-25 NL NL6701200A patent/NL6701200A/xx unknown
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018087770A1 (en) | 2016-11-14 | 2018-05-17 | Elta Systems Ltd. | Methods and systems for detecting and/or tracking a projectile |
| EP3538923A4 (en) * | 2016-11-14 | 2020-09-16 | Elta Systems Ltd. | Methods and systems for detecting and/or tracking a projectile |
| US11378676B2 (en) | 2016-11-14 | 2022-07-05 | Elta Systems Ltd. | Methods and systems for detecting and/or tracking a projectile |
| IL248966B (en) * | 2016-11-14 | 2022-10-01 | Elta Systems Ltd | Methods and systems for detecting and/or tracking projectile |
| IL248966B2 (en) * | 2016-11-14 | 2023-02-01 | Elta Systems Ltd | Methods and systems for detecting and/or tracking projectile |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1508843A (en) | 1968-01-05 |
| NL6701200A (en) | 1967-07-26 |
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