GB800583A - Directional antenna control system - Google Patents
Directional antenna control systemInfo
- Publication number
- GB800583A GB800583A GB7703/56A GB770356A GB800583A GB 800583 A GB800583 A GB 800583A GB 7703/56 A GB7703/56 A GB 7703/56A GB 770356 A GB770356 A GB 770356A GB 800583 A GB800583 A GB 800583A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aerial
- amplified
- signals
- loop aerial
- switched
- 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
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
- G01S3/38—Systems for determining direction or deviation from predetermined direction using adjustment of real or effective orientation of directivity characteristic of an antenna or an antenna system to give a desired condition of signal derived from that antenna or antenna system, e.g. to give a maximum or minimum signal
- G01S3/42—Systems for determining direction or deviation from predetermined direction using adjustment of real or effective orientation of directivity characteristic of an antenna or an antenna system to give a desired condition of signal derived from that antenna or antenna system, e.g. to give a maximum or minimum signal the desired condition being maintained automatically
Abstract
800,583. Automatic control systems for radio aerials. BENDIX AVIATION CORPORATION. March 12, 1956 [March 22, 1955], No. 7703/56. Class 38 (4). [Also in Group XL (c)] In a switched cardioid radio direction-finder, the combined signal obtained from the omnidirectional aerial and the switched output of the loop aerial is applied to a synchronous detector the output of which is an asymmetrical wave, the D.C. component of which controls a motor driving the loop aerial to the null position. Signals from the loop aerial 1 are amplified and shifted 90 degrees in phase, then switched in and out of phase with signals from the omnidirectional aerial 8 by means of a balanced modulator 3 and low-frequency oscillator 4. Signals from both aerials are added at 5, amplified by a super-heterodyne receiver 10, 12, 13 and applied in series with a switching signal from the oscillator 4 to reversely connected diodes 18, 19. The combined output is an asymmetrical wave of the same frequency as the oscillator 4 in which the positive going halfwave is of greater amplitude than the negative half-wave for errors of one sense, and conversely for errors of opposite sense-Figs. 2a, 3a (not shown). The D.C. component of the asymmetrical wave is derived from an integrating network 25, 28, amplified at 26 and used to control a reversible motor adjusting the loop aerial 1.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US495942A US2840814A (en) | 1955-03-22 | 1955-03-22 | Directional antenna control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB800583A true GB800583A (en) | 1958-08-27 |
Family
ID=23970584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7703/56A Expired GB800583A (en) | 1955-03-22 | 1956-03-12 | Directional antenna control system |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2840814A (en) |
| ES (1) | ES227413A1 (en) |
| FR (1) | FR1147220A (en) |
| GB (1) | GB800583A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2928090A (en) * | 1955-10-24 | 1960-03-08 | Marconi Wireless Telegraph Co | Radio direction finders |
| US2991416A (en) * | 1958-05-06 | 1961-07-04 | Herbert O Ramp | Frequency shift measuring device |
| US3020548A (en) * | 1958-05-19 | 1962-02-06 | Allen Bradford Inc | Portable radio direction finder |
| DE1226173B (en) * | 1958-12-03 | 1966-10-06 | Bendix Corp | Automatic direction finder |
| BE462764A (en) * | 1963-01-09 | |||
| US3353184A (en) * | 1966-04-28 | 1967-11-14 | Bendix Corp | Automatic direction finder with frequency modulated servo control |
| US3534368A (en) * | 1968-09-16 | 1970-10-13 | Electro Technical Analysis Cor | Dual mode automatic direction finders |
| US3761931A (en) * | 1970-09-23 | 1973-09-25 | Nippon Oceanics Inst Ltd | Automatic direction finders |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL68134C (en) * | 1942-03-24 | |||
| US2456916A (en) * | 1946-01-09 | 1948-12-21 | Gen Electric | Electric blanket control |
| US2700103A (en) * | 1946-05-15 | 1955-01-18 | Selove Walter | Balanced-detector circuit |
| US2603748A (en) * | 1946-06-21 | 1952-07-15 | Jr Persa R Bell | Frequency detector |
-
1955
- 1955-03-22 US US495942A patent/US2840814A/en not_active Expired - Lifetime
-
1956
- 1956-03-12 GB GB7703/56A patent/GB800583A/en not_active Expired
- 1956-03-17 FR FR1147220D patent/FR1147220A/en not_active Expired
- 1956-03-21 ES ES0227413A patent/ES227413A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2840814A (en) | 1958-06-24 |
| FR1147220A (en) | 1957-11-20 |
| ES227413A1 (en) | 1956-05-16 |
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