GB777530A - Omni-directional radio beacon system - Google Patents
Omni-directional radio beacon systemInfo
- Publication number
- GB777530A GB777530A GB1932255A GB1932255A GB777530A GB 777530 A GB777530 A GB 777530A GB 1932255 A GB1932255 A GB 1932255A GB 1932255 A GB1932255 A GB 1932255A GB 777530 A GB777530 A GB 777530A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phase shifter
- diode
- pulse
- output
- phase
- 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)
- Power Conversion In General (AREA)
Abstract
777,530. Automatic phase-control systems. STANDARD TELEPHONES & CABLES, Ltd. (International Telephone & Telegraph Corporation). July 4, 1955, No. 19322/55. Class 38 (4). [Also in Group XL (c)] In a receiver for use in a phase comparison radio navigation system (see Group XL (c)), the received signal, Fig. 1B (not shown), comprises a pulse train of high recurrence frequency and two intercalated trains of N and S reference pulses 28 and 29, each of lower recurrence frequency, e.g. 30 c/s., the pulse signals being amplitude modulated at the frequency f and a harmonic thereof, e.g. 3f. The N and S reference pulses are extracted, Fig. 2 (not shown), and applied through a transformer 45 in opposite polarity to a sinusoidal oscillator 46 so that the output from oscillator 46 is synchronized with either one or both of the reference signals and in order to ensure exact synchronization the output from oscillator 46 is applied to the coincidence circuit 41, Fig. 2 (not shown), through a phase shifter 49 which is controlled automatically by a doublediode phase discriminator 50a, 50b. An output from phase shifter 49 is applied through an inverter 47 to the anode of diode 50a and the cathode of diode 50b and the reference signals are also applied to a thyratron 59 producing corresponding D.C. pulses which are coupled to the series connected primaries of transformers 60, 61 whose secondaries are so coupled to discriminator 50a, 50b that for each reference pulse a positive pulse is applied to the anode of diode 50a and a negative pulse is applied to the cathode of diode 50b, the amplitude of the applied pulses being greater than that of the peak amplitude of the sine wave from tube 47. The cathode of diode 50a is connected to the anode of diode 50b and the common junction is coupled to the phase shifter 49 over a pulsewidening network 55 having a time constant shorter than the periodic time of the sine wave. The phase shifter 49 is responsive only to voltages greater than the peak amplitude of the sinusoidal component of the output from the diodes. When correct synchronization obtains the reference pulses are coincident with the cross-overs of the sine wave output from phase shifter 49, the pulse outputs from the diodes cancel and no effective control voltage is applied to the phase shifter, but when this condition does not obtain then during one half-cycle of the sine wave the resultant diode output includes a pulse component of one polarity which adjusts the phase shifter 49 to reduce the phase error and in the next half-cycle the output includes a pulse component of smaller amplitude and of oppoaite polarity which adjusts the phase shifter in the reverse direction by a smaller amount, the process being repeated until synchronization is attained.
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR80962D FR80962E (en) | 1955-07-04 | ||
GB1932255A GB777530A (en) | 1955-07-04 | 1955-07-04 | Omni-directional radio beacon system |
FR697547A FR1279902A (en) | 1955-07-04 | 1955-08-15 | Omnidirectional beacon |
DEI10587A DE1027264B (en) | 1955-07-04 | 1955-08-25 | Omnidirectional radio beacon |
FR735599A FR77152E (en) | 1955-07-04 | 1957-04-04 | Omnidirectional beacon |
FR737334A FR77153E (en) | 1955-07-04 | 1957-04-26 | Omnidirectional beacon |
US671435A US2915750A (en) | 1955-07-04 | 1957-07-12 | Radio navigation beacon |
FR747883A FR77154E (en) | 1955-07-04 | 1957-09-23 | Omnidirectional beacon |
FR770020A FR77156E (en) | 1955-07-04 | 1958-07-10 | Omnidirectional beacon |
FR770023A FR77157E (en) | 1955-07-04 | 1958-07-10 | Omnidirectional beacon |
FR772677A FR77158E (en) | 1955-07-04 | 1958-08-18 | Omnidirectional beacon |
FR836886A FR78573E (en) | 1955-07-04 | 1960-08-26 | Omnidirectional beacon |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1932255A GB777530A (en) | 1955-07-04 | 1955-07-04 | Omni-directional radio beacon system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB777530A true GB777530A (en) | 1957-06-26 |
Family
ID=10127426
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1932255A Expired GB777530A (en) | 1955-07-04 | 1955-07-04 | Omni-directional radio beacon system |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR80962E (en) |
GB (1) | GB777530A (en) |
-
0
- FR FR80962D patent/FR80962E/fr not_active Expired
-
1955
- 1955-07-04 GB GB1932255A patent/GB777530A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR80962E (en) | 1963-11-13 |
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