GB993871A - Improvements in or relating to direction finding receivers - Google Patents
Improvements in or relating to direction finding receiversInfo
- Publication number
- GB993871A GB993871A GB3199862A GB3199862A GB993871A GB 993871 A GB993871 A GB 993871A GB 3199862 A GB3199862 A GB 3199862A GB 3199862 A GB3199862 A GB 3199862A GB 993871 A GB993871 A GB 993871A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- voltage
- channels
- sine
- aug
- 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
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Radio Transmission System (AREA)
Abstract
993,871. Direction finders. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. Aug. 21, 1962 [Aug. 26, 1961], No. 31998/62. Addition to 836,687. Heading H4D. A direction finder of the type described in the parent Specification wherein the sine and cosine components of the receiver signal are separately processed in A.G.C. amplifiers and integrators, to give average products, smoothing out random fluctuations, for application to orthogonal deflection plates of a CRT, is modified by the provision of gain control or gate means 13 and 14 between the respective rectifiers 6 and 7 (17 and 18 in the above Specification) and the integrating circuits 10 and 11 (19 and 20). The gain control or gate means are controlled by a voltage signal derived from the A.G.C. unit 15 (9) method when the signals received at the aerial array 1 are severely faded the signals from the sine and cosine receiver channels 3 and 4 are prevented from passing to their respective integrators for erroneous inclusion in the additions therein. Severe fading of the received signal causes the A.G.C. unit signal to decrease, whence it is inverted to positive going in inverting circuit 16 and compared with a preset positive fade limit voltage in threshold device 17, a signal being sent to the units 13 and 14 when the inverted signal becomes greater than the preset voltage. If the inputs to the two channels are periodically reversed then the control voltage for both channels may be obtained from one channel.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DET20660A DE1147636B (en) | 1961-08-26 | 1961-08-26 | Visual direction finder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB993871A true GB993871A (en) | 1965-06-02 |
Family
ID=7549799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3199862A Expired GB993871A (en) | 1961-08-26 | 1962-08-21 | Improvements in or relating to direction finding receivers |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1147636B (en) |
| GB (1) | GB993871A (en) |
-
1961
- 1961-08-26 DE DET20660A patent/DE1147636B/en active Pending
-
1962
- 1962-08-21 GB GB3199862A patent/GB993871A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1147636B (en) | 1963-04-25 |
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