EP0345768A3 - Antenna reconfigurable with respect to frequency, coverage and polarisation - Google Patents
Antenna reconfigurable with respect to frequency, coverage and polarisation Download PDFInfo
- Publication number
- EP0345768A3 EP0345768A3 EP19890110358 EP89110358A EP0345768A3 EP 0345768 A3 EP0345768 A3 EP 0345768A3 EP 19890110358 EP19890110358 EP 19890110358 EP 89110358 A EP89110358 A EP 89110358A EP 0345768 A3 EP0345768 A3 EP 0345768A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- frequency
- antenna
- polarisation
- coverage
- respect
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
- H01Q25/001—Crossed polarisation dual antennas
-
- 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
- H01Q3/245—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 in the focal plane of a focussing device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
- H01Q5/45—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more feeds in association with a common reflecting, diffracting or refracting device
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT4806788 | 1988-06-09 | ||
| IT48067/88A IT1219615B (it) | 1988-06-09 | 1988-06-09 | Antenna riconfigurabile in frequenza-copertura-polarizzazione |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0345768A2 EP0345768A2 (en) | 1989-12-13 |
| EP0345768A3 true EP0345768A3 (en) | 1990-11-28 |
Family
ID=11264328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19890110358 Withdrawn EP0345768A3 (en) | 1988-06-09 | 1989-06-08 | Antenna reconfigurable with respect to frequency, coverage and polarisation |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0345768A3 (it) |
| IT (1) | IT1219615B (it) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6836258B2 (en) | 2002-11-22 | 2004-12-28 | Ems Technologies Canada, Ltd. | Complementary dual antenna system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3795004A (en) * | 1973-02-26 | 1974-02-26 | Us Army | Cassegrain radar antenna with selectable acquisition and track modes |
| EP0100466A1 (en) * | 1982-07-12 | 1984-02-15 | Nec Corporation | Dual-band antenna system of a beam waveguide type |
| US4535338A (en) * | 1982-05-10 | 1985-08-13 | At&T Bell Laboratories | Multibeam antenna arrangement |
-
1988
- 1988-06-09 IT IT48067/88A patent/IT1219615B/it active
-
1989
- 1989-06-08 EP EP19890110358 patent/EP0345768A3/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3795004A (en) * | 1973-02-26 | 1974-02-26 | Us Army | Cassegrain radar antenna with selectable acquisition and track modes |
| US4535338A (en) * | 1982-05-10 | 1985-08-13 | At&T Bell Laboratories | Multibeam antenna arrangement |
| EP0100466A1 (en) * | 1982-07-12 | 1984-02-15 | Nec Corporation | Dual-band antenna system of a beam waveguide type |
Non-Patent Citations (1)
| Title |
|---|
| Conference Proceedings 11th European Microwave Conference September 1981, Amsterdam/The Netherlands pages 567 - 572; Giefing;Leupelt: "A 12m Cassegrain Antenna with "Off-Set"Feed System for two Frequency Ranges and Monopulse Tracking with Bearing Error Correction" * |
Also Published As
| Publication number | Publication date |
|---|---|
| IT8848067A0 (it) | 1988-06-09 |
| IT1219615B (it) | 1990-05-24 |
| EP0345768A2 (en) | 1989-12-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB2337365A (en) | Versatile antenna array for multiple pencil beams and efficient beam combinations | |
| DE69014128D1 (de) | Anpassbare antenne. | |
| GB1531110A (en) | Antennas | |
| GB2281012B (en) | Angle diversity for multiple beam antenna | |
| AU1943183A (en) | Variable dilution ratio hose-end sprayer | |
| DE69413210D1 (de) | Kurze konische antenne | |
| FR2696013B1 (fr) | Combineur holographique escamotable, notamment pour aéronef. | |
| DE69428767D1 (de) | Einziehbare Antenne | |
| DE69008736D1 (de) | Breitbandige kreisförmige phasengesteuerte gruppenantenne. | |
| DK719988D0 (da) | Antenne til anvendelse i flere frekvensomraader | |
| EP0345768A3 (en) | Antenna reconfigurable with respect to frequency, coverage and polarisation | |
| CA2030631A1 (en) | Array antenna with forced excitation | |
| FR2693317B1 (fr) | Antenne de radar secondaire fonctionnant en mode S. | |
| IT1172431B (it) | Perfezionamenti alle antenne emittenti-riceventi | |
| DE3062089D1 (en) | Reverse cassegrain antenna for multipurpose radar | |
| CA2022854A1 (en) | Multiple beam deployable space antenna system | |
| AU506722B2 (en) | Dme diversity antenna system | |
| CA2043321A1 (en) | Antenna for portable radio equipment | |
| EP0624917A3 (en) | Radiation antenna compression method for radar antenna diagrams. | |
| JPS55154803A (en) | Antenna unit such as cassegrain antenna unit | |
| CO4790199A1 (es) | Antena tripode retractil | |
| JPS55145402A (en) | Electromagnetic horn | |
| JPS535919A (en) | Power synthesizer | |
| JPS5432249A (en) | Array antenna | |
| JPS5647106A (en) | Multihorn shaped-beam antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): CH DE ES FR GB LI SE |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): CH DE ES FR GB LI SE |
|
| 17P | Request for examination filed |
Effective date: 19910525 |
|
| 17Q | First examination report despatched |
Effective date: 19930809 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19940419 |