DE68900266D1 - Drei-reflektor-antennensystem mit kreuzpolarisationsunterdrueckung. - Google Patents
Drei-reflektor-antennensystem mit kreuzpolarisationsunterdrueckung.Info
- Publication number
- DE68900266D1 DE68900266D1 DE8989101694T DE68900266T DE68900266D1 DE 68900266 D1 DE68900266 D1 DE 68900266D1 DE 8989101694 T DE8989101694 T DE 8989101694T DE 68900266 T DE68900266 T DE 68900266T DE 68900266 D1 DE68900266 D1 DE 68900266D1
- Authority
- DE
- Germany
- Prior art keywords
- cross
- antenna system
- reflector antenna
- polarization cancellation
- cancellation
- 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 - Fee Related
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
- H01Q19/10—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 reflecting surfaces
- H01Q19/18—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 reflecting surfaces having two or more spaced reflecting surfaces
- H01Q19/19—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 reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
- H01Q19/191—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 reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface wherein the primary active element uses one or more deflecting surfaces, e.g. beam waveguide feeds
-
- 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
- H01Q19/02—Details
- H01Q19/021—Means for reducing undesirable effects
- H01Q19/028—Means for reducing undesirable effects for reducing the cross polarisation
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2413288 | 1988-02-04 | ||
JP2413388 | 1988-02-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE68900266D1 true DE68900266D1 (de) | 1991-10-24 |
Family
ID=26361617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8989101694T Expired - Fee Related DE68900266D1 (de) | 1988-02-04 | 1989-02-01 | Drei-reflektor-antennensystem mit kreuzpolarisationsunterdrueckung. |
Country Status (5)
Country | Link |
---|---|
US (1) | US5075692A (de) |
EP (1) | EP0335077B1 (de) |
JP (1) | JPH0720012B2 (de) |
DE (1) | DE68900266D1 (de) |
NO (1) | NO178449C (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5485168A (en) * | 1994-12-21 | 1996-01-16 | Electrospace Systems, Inc. | Multiband satellite communication antenna system with retractable subreflector |
US5790077A (en) * | 1996-10-17 | 1998-08-04 | Space Systems/Loral, Inc. | Antenna geometry for shaped dual reflector antenna |
JP2003277191A (ja) * | 2002-03-26 | 2003-10-02 | Japan Science & Technology Corp | Yb混晶酸化物単結晶からなるシンチレータ用発光材料 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4109253A (en) * | 1977-02-22 | 1978-08-22 | Bell Telephone Laboratories, Incorporated | Method and apparatus for substantially reducing cross polarized radiation in offset reflector antennas |
US4166276A (en) * | 1977-12-05 | 1979-08-28 | Bell Telephone Laboratories, Incorporated | Offset antenna having improved symmetry in the radiation pattern |
US4298877A (en) * | 1979-01-26 | 1981-11-03 | Solar Energy Technology, Inc. | Offset-fed multi-beam tracking antenna system utilizing especially shaped reflector surfaces |
JPS5991708A (ja) * | 1982-11-17 | 1984-05-26 | Mitsubishi Electric Corp | アンテナ装置 |
JPS6128247A (ja) * | 1984-07-19 | 1986-02-07 | Nec Corp | 多方向マイクロ回線における同期伝送方式 |
JPS6129569A (ja) * | 1984-07-20 | 1986-02-10 | Tokyo Electric Co Ltd | 印字機の紙送り装置 |
JPS6129570A (ja) * | 1984-07-20 | 1986-02-10 | Tokyo Electric Co Ltd | 紙送り装置 |
-
1989
- 1989-02-01 EP EP89101694A patent/EP0335077B1/de not_active Expired - Lifetime
- 1989-02-01 JP JP2349889A patent/JPH0720012B2/ja not_active Expired - Lifetime
- 1989-02-01 DE DE8989101694T patent/DE68900266D1/de not_active Expired - Fee Related
- 1989-02-02 NO NO890422A patent/NO178449C/no unknown
-
1991
- 1991-01-16 US US07/642,183 patent/US5075692A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0335077A1 (de) | 1989-10-04 |
US5075692A (en) | 1991-12-24 |
JPH0220902A (ja) | 1990-01-24 |
NO178449B (no) | 1995-12-18 |
NO178449C (no) | 1996-03-27 |
JPH0720012B2 (ja) | 1995-03-06 |
NO890422D0 (no) | 1989-02-02 |
EP0335077B1 (de) | 1991-09-18 |
NO890422L (no) | 1989-08-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8320 | Willingness to grant licences declared (paragraph 23) | ||
8339 | Ceased/non-payment of the annual fee |