GB1412352A - Follow-up system for microwave antennae - Google Patents
Follow-up system for microwave antennaeInfo
- Publication number
- GB1412352A GB1412352A GB1308373A GB1308373A GB1412352A GB 1412352 A GB1412352 A GB 1412352A GB 1308373 A GB1308373 A GB 1308373A GB 1308373 A GB1308373 A GB 1308373A GB 1412352 A GB1412352 A GB 1412352A
- Authority
- GB
- United Kingdom
- Prior art keywords
- waves
- coupler
- hybrid
- mode
- outputs
- 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
- G01S3/146—Systems for determining direction or deviation from predetermined direction by comparing linear polarisation components
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
- H01Q25/04—Multimode antennas
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
1412352 Mode couplers LICENTIA-PATENT VERWALTUNGS GmbH 19 March 1973 [17 March 1972] 13083/73 Heading H1W [Also in Division H4] A direction-finder system, in which higher order modes produced in a waveguide are utilized to provide azimuth and elevation angular deviation data concerning a distant transmitter, comprises a transistion between an aerial feed waveguide of non-square crosssection, e.g. circular, or cruciform, or octagonal and a succeeding waveguide of square crosssection, and a mode coupler adapted to extract the deviation data from the received signal. The mode coupler may be provided with a branch network and the deviation data signal be applied to a comparator network. The system may be used with either linearly or circularly polarized radiation, and it is particularly suitable for tracking a communications satellite from a ground station. As described, a mode coupler H, Figs. 4, 5, comprises a square cross-section wave guiding member tapering from its front part, where it receives any H 20 and H 02 mode waves from the square cross-section waveguide (arising from angular deviations of the transmitter), to its rear part. The H 20 and H 02 mode waves are capable of propagation only in the front part of the coupler, so that standing waves are set up which are coupled out by eight elements K1 to K4 (H 20 waves) and K5 to K8 (H 02 waves). The couplers comprise longitudinally extending bars B which are evenly spaced around the coupler, as shown. Each bar is connected at its middle to a co-axial wave guide member L, which extends to a coupling loop in a cavity HO. The pairs of elements (K1, K2), (K3, K4), (K5, K6), (K7, K8) provide inputs to respective hybrids HY1, HY2, HY3, HY4, in which said cavities HO are comprised. Outputs from the hybrids HY1, HY2 are combined in a hybrid HY5 to provide at a port 4 thereof an output PH20 equivalent in amplitude to the original H 20 waves. The hybrids HY3, HY4 are similarly coupled to a hybrid HY6, and an output PHO2 equivalent in amplitude to the original H 02 waves appears at a port 4 thereof. In a first arrangement for processing the PH20 and PH02 outputs they are combined in a directional coupler R, Fig. 10, having variable coupling attenuation α K . A variable phase shifter Ph is inserted in the PH02 line. The directional coupler R provides outputs which are respresentative of the angular deviations of the transmitter in orthogonally disposed planes. In a second arrangement, the PH20 and PH02 outputs are coupled through a hybrid (HY7), Fig. 11 (not shown), and in a third arrangement the outputs from that hybrid are coupled through a further hybrid (HY8), Fig. 12 (not shown), a variable phase shifter and a variable attenuator being connected in circuit between the said two hybrids.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2212996A DE2212996C3 (en) | 1972-03-17 | 1972-03-17 | Horn antenna that can be tracked to a movable transmitter |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1412352A true GB1412352A (en) | 1975-11-05 |
Family
ID=5839255
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1308373A Expired GB1412352A (en) | 1972-03-17 | 1973-03-19 | Follow-up system for microwave antennae |
Country Status (6)
Country | Link |
---|---|
US (1) | US3864683A (en) |
JP (1) | JPS5617623B2 (en) |
CA (1) | CA990833A (en) |
DE (1) | DE2212996C3 (en) |
FR (1) | FR2176840B1 (en) |
GB (1) | GB1412352A (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4043654A (en) * | 1971-02-12 | 1977-08-23 | Xerox Corporation | Display system |
IT974574B (en) * | 1972-09-15 | 1974-07-10 | Finike Italiana Marposs | COMPARATIVE MICROMETER WITH FAST AND AUTOMATIC ZEROING DEVICE |
JPS5635763Y2 (en) * | 1976-04-30 | 1981-08-24 | ||
DE2744841C3 (en) * | 1977-10-05 | 1980-08-21 | Endress U. Hauser Gmbh U. Co, 7867 Maulburg | Exponentially expanding horn antenna for a microwave antenna |
DE3020514A1 (en) * | 1980-05-30 | 1981-12-10 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | AERIAL FEEDING SYSTEM FOR A TRACKABLE AERIAL |
US4343005A (en) * | 1980-12-29 | 1982-08-03 | Ford Aerospace & Communications Corporation | Microwave antenna system having enhanced band width and reduced cross-polarization |
DE3216708A1 (en) * | 1982-05-05 | 1984-02-09 | ANT Nachrichtentechnik GmbH, 7150 Backnang | METHOD FOR OBTAINING ANTENNA SIGNAL SIGNALS |
DE3381303D1 (en) * | 1983-06-18 | 1990-04-12 | Ant Nachrichtentech | FOUR-TORCH NETWORK FOR MICROWAVE ANTENNAS WITH MONOPULUS TRACKING. |
US5216433A (en) * | 1991-11-15 | 1993-06-01 | Hughes Aircraft Company | Polarimetric antenna |
US9640851B2 (en) * | 2014-05-26 | 2017-05-02 | The Board Of Trustees Of The Leland Stanford Junior University | RF waveguide phase-directed power combiners |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2931033A (en) * | 1955-07-19 | 1960-03-29 | Bell Telephone Labor Inc | Multi-mode automatic tracking antenna system |
-
1972
- 1972-03-17 DE DE2212996A patent/DE2212996C3/en not_active Expired
-
1973
- 1973-03-16 JP JP3076173A patent/JPS5617623B2/ja not_active Expired
- 1973-03-16 CA CA166,235A patent/CA990833A/en not_active Expired
- 1973-03-16 FR FR7309630A patent/FR2176840B1/fr not_active Expired
- 1973-03-19 GB GB1308373A patent/GB1412352A/en not_active Expired
- 1973-03-19 US US342427A patent/US3864683A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE2212996C3 (en) | 1980-09-25 |
DE2212996A1 (en) | 1973-09-27 |
JPS496861A (en) | 1974-01-22 |
US3864683A (en) | 1975-02-04 |
DE2212996B2 (en) | 1980-01-31 |
CA990833A (en) | 1976-06-08 |
JPS5617623B2 (en) | 1981-04-23 |
FR2176840A1 (en) | 1973-11-02 |
FR2176840B1 (en) | 1980-04-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |