GB772806A - Omni-directional radio range system - Google Patents
Omni-directional radio range systemInfo
- Publication number
- GB772806A GB772806A GB1932455A GB1932455A GB772806A GB 772806 A GB772806 A GB 772806A GB 1932455 A GB1932455 A GB 1932455A GB 1932455 A GB1932455 A GB 1932455A GB 772806 A GB772806 A GB 772806A
- Authority
- GB
- United Kingdom
- Prior art keywords
- discriminator
- beacon
- phase
- frequency
- harmonics
- 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)
Abstract
772,806. Radio navigation. STANDARD TELEPHONES & CABLES, Ltd. July 4, 1955, No. 19324/55. Class 40(7), Relates to a phase beacon system of the type disclosed in Specification 768,109 in which the directivity pattern of the beacon is as shown in Fig. 2 and is rotated at a frequency of f<SP>1</SP> r.p.s. so that the envelope of the amplitude variation of the signal received at a mobile receiver, Fig. 4, comprises the first, third and fifth harmonics f<SP>1</SP>, f<SP>3</SP> and f<SP>5</SP>, this envelope waveform being detected at 9 and applied through an amplifier 10 to a phase discriminator 20 together with corresponding reference signals of frequency f<SP>1</SP>, f<SP>3</SP> and f<SP>5</SP> derived from a signal transmitted from the beacon. According to the present invention the R.F. energy applied to the directional beacon aerial, Fig. 3 (not shown) is amplitude modulated by a reference signal f<SP>1</SP> and at the mobile receiver, Fig. 4; the subcarrier output from detector 9 is selected by filter 11 and applied through a limiter 12 to an F.M. discriminator 13 giving a reference signal f<SP>1</SP> which is applied through a phase shifter 14 to a distorting circuit 15 producing harmonics f<SP>1</SP>, f<SP>3</SP> and f<SP>5</SP> which are selected by filters 17, 18 and 19 and applied to discriminator 20. The bearing of the receiver is given by the adjustment of phase shifter 14 necesary to produce a zero reading in the centre-zero metre 21 coupled to the output of discriminator 20.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US215538A US2753555A (en) | 1951-03-14 | 1951-03-14 | Omni direction radio range system |
| GB1932455A GB772806A (en) | 1955-07-04 | 1955-07-04 | Omni-directional radio range system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1932455A GB772806A (en) | 1955-07-04 | 1955-07-04 | Omni-directional radio range system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB772806A true GB772806A (en) | 1957-04-17 |
Family
ID=10127463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1932455A Expired GB772806A (en) | 1951-03-14 | 1955-07-04 | Omni-directional radio range system |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB772806A (en) |
-
1955
- 1955-07-04 GB GB1932455A patent/GB772806A/en not_active Expired
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