CA1029127A - Simplified doppler antenna system - Google Patents
Simplified doppler antenna systemInfo
- Publication number
- CA1029127A CA1029127A CA233,977A CA233977A CA1029127A CA 1029127 A CA1029127 A CA 1029127A CA 233977 A CA233977 A CA 233977A CA 1029127 A CA1029127 A CA 1029127A
- Authority
- CA
- Canada
- Prior art keywords
- antenna system
- doppler antenna
- simplified
- simplified doppler
- doppler
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/06—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens
- H01Q19/08—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens for modifying the radiation pattern of a radiating horn in which it is located
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/02—Waveguide horns
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
- H01Q25/007—Antennas or antenna systems providing at least two radiating patterns using two or more primary active elements in the focal region of a focusing device
-
- 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
- H01Q3/26—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 relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
-
- 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
- H01Q3/26—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 relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/2658—Phased-array fed focussing structure
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)
- Aerials With Secondary Devices (AREA)
- Waveguide Aerials (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US521118A US3914765A (en) | 1974-11-05 | 1974-11-05 | Simplified doppler antenna system |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1029127A true CA1029127A (en) | 1978-04-04 |
Family
ID=24075441
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA233,977A Expired CA1029127A (en) | 1974-11-05 | 1975-08-22 | Simplified doppler antenna system |
Country Status (7)
Country | Link |
---|---|
US (1) | US3914765A (en) |
JP (1) | JPS5165860A (en) |
CA (1) | CA1029127A (en) |
DE (1) | DE2549384A1 (en) |
FR (1) | FR2290767A1 (en) |
GB (1) | GB1511687A (en) |
NL (1) | NL7512398A (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4045800A (en) * | 1975-05-22 | 1977-08-30 | Hughes Aircraft Company | Phase steered subarray antenna |
US4025921A (en) * | 1975-11-19 | 1977-05-24 | The United States Of America As Represented By The Secretary Of The Army | Technique for obtaining wide bandwidth with optically fed array |
US4100548A (en) * | 1976-09-30 | 1978-07-11 | The United States Of America As Represented By The Secretary Of The Department Of Transportation | Bifocal pillbox antenna system |
US4187507A (en) * | 1978-10-13 | 1980-02-05 | Sperry Rand Corporation | Multiple beam antenna array |
US4270129A (en) * | 1979-01-30 | 1981-05-26 | Sperry Corporation | Apparatus and method for realizing preselected free space antenna patterns |
GB0701087D0 (en) | 2007-01-19 | 2007-02-28 | Plasma Antennas Ltd | A displaced feed parallel plate antenna |
US8344956B2 (en) | 2007-04-20 | 2013-01-01 | Skycross, Inc. | Methods for reducing near-field radiation and specific absorption rate (SAR) values in communications devices |
US7688273B2 (en) | 2007-04-20 | 2010-03-30 | Skycross, Inc. | Multimode antenna structure |
US8866691B2 (en) | 2007-04-20 | 2014-10-21 | Skycross, Inc. | Multimode antenna structure |
EP2947716B8 (en) * | 2014-05-23 | 2023-08-09 | Progress Rail Signaling S.p.A. | Radar obstacle detector for a railway crossing |
JP6446331B2 (en) * | 2015-06-08 | 2018-12-26 | 日立オートモティブシステムズ株式会社 | Sensor with flat beam generating antenna |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3864679A (en) * | 1973-04-03 | 1975-02-04 | Hazeltine Corp | Antenna system for radiating doppler coded pattern using multiple beam antenna |
-
1974
- 1974-11-05 US US521118A patent/US3914765A/en not_active Expired - Lifetime
-
1975
- 1975-08-07 GB GB32974/75A patent/GB1511687A/en not_active Expired
- 1975-08-22 CA CA233,977A patent/CA1029127A/en not_active Expired
- 1975-10-20 JP JP50126239A patent/JPS5165860A/ja active Pending
- 1975-10-22 NL NL7512398A patent/NL7512398A/en not_active Application Discontinuation
- 1975-11-04 DE DE19752549384 patent/DE2549384A1/en active Pending
- 1975-11-05 FR FR7533822A patent/FR2290767A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
FR2290767A1 (en) | 1976-06-04 |
NL7512398A (en) | 1976-05-07 |
DE2549384A1 (en) | 1976-05-13 |
JPS5165860A (en) | 1976-06-07 |
GB1511687A (en) | 1978-05-24 |
US3914765A (en) | 1975-10-21 |
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