Source antennas for transmitting/receiving electromagnetic waves for satellite telecommunications systems

• US 6,535,169 B2
• Filed: 06/05/2001
• Issued: 03/18/2003
• Est. Priority Date: 06/09/2000
• Status: Expired due to Term

• Current Assignee: InterDigital Madison Patent Holdings (InterDigital, Inc.)
• Original Assignee: Thomson Licensing SA (Vantiva SA)
• Inventors: Louzir, Ali, Minard, Philippe, Fourdeux, Henri
• Primary Examiner(s): Nguyen, Hoang
• Application Number:
  US09/874,696
• Publication Number:
  US 20020018019A1
• Time in Patent Office: 651 Days
• Field of Search: 343/700.MS, 343/725, 343/846, 343/772, 343/785, 343/786, 343/767, 343/773
• US Class Current: 343/700.0MS
• CPC Class Codes: H01Q 19/17 the primary radiating source comprising two or more radiating elements H01Q19/15, H01Q25/00 take precedence
• CPC Class Codes: H01Q 21/065 Patch antenna array
• CPC Class Codes: H01Q 21/067 using endfire radiating aerial units transverse to the plane of the array
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 21/30 Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
• CPC Class Codes: H01Q 25/007 using two or more primary active elements in the focal region of a focusing device for operation on different wavebands H01Q5/22

Abstract

The present invention relates to a source antenna for transmitting/receiving electromagnetic waves comprising means for transmitting electromagnetic waves with longitudinal radiation operating in a first frequency band and means for receiving electromagnetic waves, characterized in that the means for receiving electromagnetic waves consist of a first array of n radiating elements operating in a second frequency band and a second array of n′ radiating elements operating in a third frequency band, the first and second arrays and the longitudinal-radiation means having a substantially common phase centre and the radiating elements of the first and second arrays being arranged around the longitudinal-radiation means.

Claims

1. Source antenna for transmitting/receiving electromagnetic waves comprising means for transmitting electromagnetic waves with longitudinal radiation operating in a first frequency band and means for receiving electromagnetic waves, wherein the means for receiving electromagnetic waves comprises a first array of n radiating elements operating in a second frequency band and a second array of n′

radiating elements operating in a third frequency band, the first and second arrays and the longitudinal-radiation means having a substantially common phase centre and the radiating elements of the first and second arrays being arranged around the longitudinal-radiation means.

2. Source antenna according to claim 1, wherein the first array of n radiating elements comprises an array of n patches having linear or circular, orthogonal double polarization.

3. Source antenna according to claim 2, wherein the first array of n patches is connected to a feed circuit made in microstrip technology on a first substrate.

4. Source antenna according to claim 1, wherein the means for transmitting electromagnetic waves with longitudinal radiation comprising an antenna of the longitudinal-radiation traveling wave type with axis coinciding with the axis of radiation, excited by means comprising a waveguide.

5. Source antenna according to claim 4, wherein the antenna of the longitudinal-radiation traveling wave type comprises a dielectric rod known as a “

polyrod”

or of a helix.

6. Source antenna according to claim 4, wherein the waveguide is filled with a dielectric material.

7. Source antenna according to claim 1, wherein the second array of n′

radiating elements comprises an array of n′

radiating elements having linear or circular, orthogonal double polarization and a wide band.

8. Source antenna according to claim 7, wherein the array of n′

elements having linear or circular, orthogonal double polarization with a wide band is made by using two parallel substrates, one of the substrates being the first substrate receiving the first array.

9. Source antenna according to claim 7, wherein the radiating elements of the array with linear or circular, orthogonal double polarization and a wide band comprises two patches which are superimposed and made respectively on each substrate and coupled electromagnetically.

10. Source antenna according to claim 9, wherein the two substrates are connected plumb with the demetallized zones by metallic walls.

11. Source antenna according to claim 7, wherein the radiating elements of the array with linear or circular, orthogonal double polarization and with a wide band comprises a patch coupled electromagnetically to a probe connected to the feed circuit.

12. Source antenna according to claim 7, wherein the radiating elements of the array with linear or circular, orthogonal double polarization and a wide band comprises an aperture made in the first substrate and a probe connected to the feed circuit and made on the parallel substrate.

13. Source antenna according to claim 7, wherein the radiating elements of the array with linear or circular, orthogonal double polarization and a wide band comprises an aperture made in the first substrate and a patch connected to the feed circuit and made on the parallel substrate.

14. Source antenna according to claim 7, wherein the second array of n′

radiating elements is connected to a feed circuit made in microstrip technology.

15. Source antenna according to claim 1, wherein the first and second frequency bands correspond to the Ka band and the third frequency band corresponds to the Ku band.

16. Source antenna for transmitting/receiving electromagnetic waves comprising means for transmitting electromagnetic waves with, longitudinal radiation operating in a first frequency band and means for receiving electromagnetic waves, wherein the means for receiving electromagnetic waves comprises a first array of n radiating elements operating in a second frequency band and a second array of n′

radiating elements operating in a third frequency band, the first and second arrays and the longitudinal-radiation means having a substantially common phase centre and the radiating elements of the first and second arrays being arranged around the longitudinal-radiation means;

wherein the second array of n′

radiating elements comprises an array of n′

radiating elements having linear or circular, orthogonal double polarization and a wide band;

wherein the array of n′

elements having linear or circular, orthogonal double polarization with a wide band is made by using two parallel substrates, one of the substrates being the first substrate receiving the first array; and

wherein the first substrate is covered with a metallic layer forming an earth plane comprising demetallized zones, at the level of the radiating elements of the second array.

17. Source antenna for transmitting/receiving electromagnetic waves comprising means for transmitting electromagnetic waves with longitudinal radiation operating in a first frequency band and means for receiving electromagnetic waves, wherein the means for receiving electromagnetic waves comprises a first array of n radiating elements operating in a second frequency band and a second array of n′

radiating elements operating in a third frequency band, the first and second arrays and the longitudinal-radiation means having a substantially common phase centre and the radiating elements of the first and second arrays being arranged around the longitudinal-radiation means;

wherein the first array of n radiating elements is an array with four elements arranged in a square and in that the second array of n′

radiating elements is an array with four elements arranged in a cross around the first array.