FR2289053B1 - - Google Patents
Info
- Publication number
- FR2289053B1 FR2289053B1 FR7435447A FR7435447A FR2289053B1 FR 2289053 B1 FR2289053 B1 FR 2289053B1 FR 7435447 A FR7435447 A FR 7435447A FR 7435447 A FR7435447 A FR 7435447A FR 2289053 B1 FR2289053 B1 FR 2289053B1
- Authority
- FR
- France
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/24—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
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- 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
- G01S1/08—Systems for determining direction or position line
- G01S1/38—Systems for determining direction or position line using comparison of [1] the phase of the envelope of the change of frequency, due to Doppler effect, of the signal transmitted by an antenna moving, or appearing to move, in a cyclic path with [2] the phase of a reference signal, the frequency of this reference signal being synchronised with that of the cyclic movement, or apparent cyclic movement, of the antenna
- G01S1/40—Systems for determining direction or position line using comparison of [1] the phase of the envelope of the change of frequency, due to Doppler effect, of the signal transmitted by an antenna moving, or appearing to move, in a cyclic path with [2] the phase of a reference signal, the frequency of this reference signal being synchronised with that of the cyclic movement, or apparent cyclic movement, of the antenna the apparent movement of the antenna being produced by cyclic sequential energisation of fixed antennas
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)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7435447A FR2289053A1 (en) | 1974-10-22 | 1974-10-22 | Ground station for aircraft landing angle - has alignment of aerials which form directive lobe and which are switched along alignment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7435447A FR2289053A1 (en) | 1974-10-22 | 1974-10-22 | Ground station for aircraft landing angle - has alignment of aerials which form directive lobe and which are switched along alignment |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2289053A1 FR2289053A1 (en) | 1976-05-21 |
FR2289053B1 true FR2289053B1 (en) | 1980-04-11 |
Family
ID=9144355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7435447A Granted FR2289053A1 (en) | 1974-10-22 | 1974-10-22 | Ground station for aircraft landing angle - has alignment of aerials which form directive lobe and which are switched along alignment |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2289053A1 (en) |
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1974
- 1974-10-22 FR FR7435447A patent/FR2289053A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2289053A1 (en) | 1976-05-21 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |