JPS5571962A - Afc device for marine radar - Google Patents
Afc device for marine radarInfo
- Publication number
- JPS5571962A JPS5571962A JP14507878A JP14507878A JPS5571962A JP S5571962 A JPS5571962 A JP S5571962A JP 14507878 A JP14507878 A JP 14507878A JP 14507878 A JP14507878 A JP 14507878A JP S5571962 A JPS5571962 A JP S5571962A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- amplifier
- reception signal
- sample
- discriminators
- 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.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 abstract 2
- 238000005070 sampling Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/28—Details of pulse systems
- G01S7/285—Receivers
- G01S7/288—Coherent receivers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
PURPOSE:To improve the receiving sensitivity of an AFC device for a marine rader by controlling the local oscillating frequency or transmission frequency only by introducing an IF reception signal from an IF amplifier to thereby optimize the intermediate frequency band width. CONSTITUTION:An IF reception signal from an IF amplifier 23 is discriminated in frequency through a limitter 31 by frequency discriminators 32, 33. The radar trigger a from a trigger generator 26 is supplied to a sample pulse generator 36 to thereby form a sampling pulse b having wider duration than the transmission pulse f and to apply it to a sample-holding circuit 35. When the oscillating frequency of a transmitter 21 or a local oscillator 28 is displaced from set value, the IF reception signal is accordingly displaced. Thus, the outputs from the discriminators 32, 33 are applied to the circuit 35 and obtained with sample-holding outputs c, which are added and integrated by an integrator 37, which thereupon produces its integrated output d, which is DC amlified via a DC amplifier 38 having a bias setting potentiometer 39 and a bias power supply 40 to thus control the local oscillator 28 by the control voltage e thus obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14507878A JPS5571962A (en) | 1978-11-24 | 1978-11-24 | Afc device for marine radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14507878A JPS5571962A (en) | 1978-11-24 | 1978-11-24 | Afc device for marine radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5571962A true JPS5571962A (en) | 1980-05-30 |
Family
ID=15376865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14507878A Pending JPS5571962A (en) | 1978-11-24 | 1978-11-24 | Afc device for marine radar |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5571962A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0536384U (en) * | 1992-05-21 | 1993-05-18 | 株式会社トキメツク | Receiver for radar |
-
1978
- 1978-11-24 JP JP14507878A patent/JPS5571962A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0536384U (en) * | 1992-05-21 | 1993-05-18 | 株式会社トキメツク | Receiver for radar |
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