GB467013A - Improvements in or relating to directional radio systems - Google Patents
Improvements in or relating to directional radio systemsInfo
- Publication number
- GB467013A GB467013A GB50037A GB50037A GB467013A GB 467013 A GB467013 A GB 467013A GB 50037 A GB50037 A GB 50037A GB 50037 A GB50037 A GB 50037A GB 467013 A GB467013 A GB 467013A
- Authority
- GB
- United Kingdom
- Prior art keywords
- antenna
- beat
- transmits
- transmitted
- frequency
- 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)
- Near-Field Transmission Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
467,013. Directive wireless signalling. AGA-BALTIC RADIO AKTIEBOLAG, and DALEN, S. G. Jan. 7, 1937, No. 500. [Class 40 (v)] In a directiona transmitter comprising at least two antenna systems arranged to transmit signals of different frequency, a least one being arranged for rotating directed transmission so tha a beat tone varying in intensity is received a communication con cerning the direction of the minimum is also transmitted, enabling the bearing at the time of disappearance of the beat tone to be ascer tained. A motor 1 Fig. 2, first causes con tact 3 to operate anc oscilator 01 modulatec at audio frequency by the photo-cell and film device 4, 5, 6 and amplifier F1 1 transmits an identification signal over the antenna A1 which has a polar diagram a, Fig. 1. Contact 7 then operates and oscillator 02 transmits a frequency differing from that of 01, over antenna A2 and rotating ganiometer 8; the polar diagram being b and c, Fig. 1. At the same time antenna A1 transmits some signal such as a bell or verbal information, recorded on the film, which is heard together with the beat note of varying intensity to indicate the position of the rotating field. One of the transmitted frequencies is continuously interrupted and restarted to provide an intermittent interference note to facilitate observations of intensity variation In a modification, Fig. 4 (not shown), the non-directional antenna system is given a polar diagram as in Fig. 3, to improve the minimum and prevent swamping of the direction indications. In order to obtain the two frequencies for transmission, one H.F. oscillator may be used and modulated at the required beat frequency in a push-pull modulator which eliminates the carrier; one or both side bands then being transmitted by the directional system.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB50037A GB467013A (en) | 1937-01-07 | 1937-01-07 | Improvements in or relating to directional radio systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB50037A GB467013A (en) | 1937-01-07 | 1937-01-07 | Improvements in or relating to directional radio systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB467013A true GB467013A (en) | 1937-06-09 |
Family
ID=9705432
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB50037A Expired GB467013A (en) | 1937-01-07 | 1937-01-07 | Improvements in or relating to directional radio systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB467013A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2503412A (en) * | 1945-04-12 | 1950-04-11 | Rca Corp | Navigational system with beacon for determining angular position and distance |
US2523295A (en) * | 1945-06-07 | 1950-09-26 | Farnsworth Res Corp | Airways navigational system |
US2582894A (en) * | 1945-07-26 | 1952-01-15 | Williams Frederic Calland | Wireless beacon system |
US2609534A (en) * | 1944-08-24 | 1952-09-02 | Paul B Taylor | Radio beacon |
US2728076A (en) * | 1950-04-18 | 1955-12-20 | Gasaccumulator Svenska Ab | Arrangement at radio beacons |
US2736022A (en) * | 1950-10-13 | 1956-02-21 | Kramar | |
US2804615A (en) * | 1953-09-08 | 1957-08-27 | Westinghouse Air Brake Co | Navigational system |
-
1937
- 1937-01-07 GB GB50037A patent/GB467013A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2609534A (en) * | 1944-08-24 | 1952-09-02 | Paul B Taylor | Radio beacon |
US2503412A (en) * | 1945-04-12 | 1950-04-11 | Rca Corp | Navigational system with beacon for determining angular position and distance |
US2523295A (en) * | 1945-06-07 | 1950-09-26 | Farnsworth Res Corp | Airways navigational system |
US2582894A (en) * | 1945-07-26 | 1952-01-15 | Williams Frederic Calland | Wireless beacon system |
US2728076A (en) * | 1950-04-18 | 1955-12-20 | Gasaccumulator Svenska Ab | Arrangement at radio beacons |
US2736022A (en) * | 1950-10-13 | 1956-02-21 | Kramar | |
US2804615A (en) * | 1953-09-08 | 1957-08-27 | Westinghouse Air Brake Co | Navigational system |
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