To source-antennas for transmitting/receiving electromagnetic waves

• US 20050200553A1
• Filed: 01/12/2005
• Published: 09/15/2005
• Est. Priority Date: 06/09/2000
• Status: Active Grant

• Current Assignee: Thomson Licensing (Vantiva SA)
• Original Assignee: Thomson Licensing (Vantiva SA)
• Inventors: Pintos, Jean-Francois, Hirtzlin, Patrice, Thudor, Franck, Louzir, All
• Granted Patent: US 7,369,095 B2
• Time in Patent Office: Days
• US Class Current: 343/895
• CPC Class Codes: H01Q 11/08 Helical antennas
• CPC Class Codes: H01Q 13/24 constituted by a dielectric or ferromagnetic rod or pipe H01Q13/28 takes precedence
• 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 5/47 with a coaxial arrangement of the feeds

Abstract

The present invention relates to a source-antenna for transmitting/receiving electromagnetic waves comprising an array of n radiating elements (11₃, 11₄) operating in a first frequency band, means (20) with longitudinal radiation operating in a second frequency band, the array and the means with longitudinal radiation having a substantially common phase centre, the n radiating elements being arranged symmetrically about the longitudinal-radiation means, and each element (11₃, 11₄) of the array consisting of a radiating element of the travelling wave type.

Claims

1. Source-antenna for transmitting/receiving electromagnetic waves comprising an array of n radiating elements operating in a first frequency band, an element with longitudinal radiation operating in a second frequency band and situated at the centre of the array, the array of n radiating elements and the element with longitudinal radiation having a substantially common phase centre, the n radiating elements being arranged symmetrically about the longitudinal-radiation element, wherein each element of the array consists of a radiating element of the travelling wave type.

2. Source-antenna according to claim 1, characterized in that the radiating element of the travelling wave type is a helical device.

3. Source-antenna according to claim 2, characterized in that the length of the helical device is calculated in such a way that the radiation pattern of the array is substantially identical to the radiation pattern of the said helical device.

4. Source-antenna according to claim 2, characterized in that the helical devices are arranged so as to form a sequential-rotation array.

5. Source-antenna according to claim 1, characterized in that the array of n radiating elements is excited by a feed array of printed type.

6. Source-antenna according to claim 1, characterized in that n is equal to 4.

7. Source-antenna according to claim 1, characterized in that n is equal to 8.

8. Source-antenna according to claim 1, characterized in that the longitudinal-radiation element comprises a longitudinal-radiation dielectric rod with axis coinciding with the axis of radiation.

9. Source-antenna according to claim 1, characterized in that the longitudinal-radiation element comprises a helical device with axis coinciding with the axis of radiation.

10. Source-antenna according to claim 7, characterized in that the longitudinal-radiation element is excited by means comprising a waveguide.

11. Source-antenna according to claim 8, characterized in that the longitudinal-radiation element is excited by means comprising a waveguide.

12. Source-antenna according to claims 1, characterized in that one of the two frequency bands is used for the reception of electromagnetic waves whilst the other frequency band is used for the transmission of electromagnetic waves.