EP2545613A1 - Antenna system, radar device and radar method with 360 degree coverage - Google Patents
Antenna system, radar device and radar method with 360 degree coverageInfo
- Publication number
- EP2545613A1 EP2545613A1 EP11708351A EP11708351A EP2545613A1 EP 2545613 A1 EP2545613 A1 EP 2545613A1 EP 11708351 A EP11708351 A EP 11708351A EP 11708351 A EP11708351 A EP 11708351A EP 2545613 A1 EP2545613 A1 EP 2545613A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antennas
- positions
- reception
- polygon
- transmission
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
Definitions
- WO2007/082335 explains that this arrangement can be used to simulate a much larger array with one transmission antenna and a plurality of reception antennas.
- a synthetic aperture radar wherein reflections are measured by transmission-reception measurements at a series of positions an antenna pattern can be realized with a main lobe in a selectable direction.
- a synthetic aperture radar is realized by moving a single antenna successively to different positions to obtain the measurements, or by using respective antennas at different positions for both transmission and reception.
- reflection values can be obtained that each correspond to a virtual measurement of transmission and reception with an antenna positioned midway between the positions of a transmission and reception antenna. These reflection values can be used according to synthetic aperture radar techniques.
- the diameter of the virtual phased array is about half that of the actual array of reception antennas. This has the effect that the angular resolution of the antenna pattern is coarser than that of a phased array with antennas at the locations of the reception antennas in the actual array.
- Control and signal processing circuit 29 causes measurements of coefficients S(m,n) to be performed for each of the reception antennas 12 in the groups adjacent the active transmission antenna 10. This is repeated for all of the transmission antennas 10.
- coefficients for virtual antennas at a plurality of positions p(m,n) are notionally obtained.
- weight factors w(d,m,n) may be selected as phase vectors exp( -2*i*k'*p(m,n)), where k' is a wavevector in the direction d, but there is considerable freedom in the selection of the weight factors w(d,m,n).
- weight factors for certain combinations of transmission and reception antennas may be made zero. For example only weight factors for pairs in a sector of the circle that faces the direction d are non zero.
- the amplitude of the weight factors may be different for different pairs.
- An optimization algorithm may be used to select the values of the weight factors. Such optimization algorithms are known from the field of synthetic aperture radar.
- the antennas may be arranged on a three dimensional sphere, with the transmission antennas 10 at the corners of a three dimensional polygon.
- Regular polygons a tetraeder, cube, pentaheder, octaheder, dodecaheder or regular twenty plane
- the reception antennas 12 may be located on the ribs between corners, or planes between corners.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11708351.9A EP2545613B1 (en) | 2010-03-09 | 2011-03-09 | Antenna system, radar device and radar method with 360 degree coverage |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10155992A EP2365585A1 (en) | 2010-03-09 | 2010-03-09 | Antenna system, radar device and radar method with 360 degree coverage |
PCT/NL2011/050163 WO2011112084A1 (en) | 2010-03-09 | 2011-03-09 | Antenna system, radar device and radar method with 360 degree coverage |
EP11708351.9A EP2545613B1 (en) | 2010-03-09 | 2011-03-09 | Antenna system, radar device and radar method with 360 degree coverage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2545613A1 true EP2545613A1 (en) | 2013-01-16 |
EP2545613B1 EP2545613B1 (en) | 2018-07-18 |
Family
ID=42272134
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10155992A Withdrawn EP2365585A1 (en) | 2010-03-09 | 2010-03-09 | Antenna system, radar device and radar method with 360 degree coverage |
EP11708351.9A Not-in-force EP2545613B1 (en) | 2010-03-09 | 2011-03-09 | Antenna system, radar device and radar method with 360 degree coverage |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10155992A Withdrawn EP2365585A1 (en) | 2010-03-09 | 2010-03-09 | Antenna system, radar device and radar method with 360 degree coverage |
Country Status (2)
Country | Link |
---|---|
EP (2) | EP2365585A1 (en) |
WO (1) | WO2011112084A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2840650B1 (en) * | 2013-08-24 | 2018-12-26 | HENSOLDT Sensors GmbH | Three-dimensional antenna array |
TWI583145B (en) | 2015-09-22 | 2017-05-11 | 啟碁科技股份有限公司 | Radio-frequency transceiver system |
CN106549226B (en) * | 2015-09-22 | 2019-09-03 | 启碁科技股份有限公司 | Radio-frequency system |
EP3579337A1 (en) | 2018-06-07 | 2019-12-11 | Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO | Radar antenna for use in a miniature unmanned aerial vehicle |
US11579234B2 (en) * | 2019-08-02 | 2023-02-14 | Rockwell Collins, Inc. | Interferometric direction-finding antenna array with multiplexed/switched radiating elements |
CN114325716A (en) * | 2021-12-24 | 2022-04-12 | 深圳市道通智能航空技术股份有限公司 | Radar device and unmanned aerial vehicle |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE172060T1 (en) * | 1991-11-08 | 1998-10-15 | Teledesic Llc | GROUND ANTENNAS FOR SATELLITE COMMUNICATION SYSTEM |
EP1938421A4 (en) * | 2005-10-17 | 2010-03-31 | Groundprobe Pty Ltd | Synthetic aperture perimeter array radar |
EP1989570B1 (en) | 2006-01-17 | 2016-07-27 | Teledyne Australia Pty Ltd. | Surveillance apparatus and method |
WO2009036507A1 (en) * | 2007-09-19 | 2009-03-26 | Teledyne Australia Pty Ltd | Imaging system and method |
-
2010
- 2010-03-09 EP EP10155992A patent/EP2365585A1/en not_active Withdrawn
-
2011
- 2011-03-09 EP EP11708351.9A patent/EP2545613B1/en not_active Not-in-force
- 2011-03-09 WO PCT/NL2011/050163 patent/WO2011112084A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2011112084A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2365585A1 (en) | 2011-09-14 |
EP2545613B1 (en) | 2018-07-18 |
WO2011112084A1 (en) | 2011-09-15 |
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