# US 2013/0278474 A1 · Directional Mobile Antenna with Polarization Switching by Displacement of Radiating Panels

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- Number: US 2013/0278474 A1
- Document ID: US20130278474A1
- Status: Published application
- Kind: A1
- Application number: 13/865,029
- Filed: 2013-04-17
- Published: 2013-10-24
- Earliest claimed: 2012-04-20
- Assignees: Thales
- Applicants: Thales
- Inventors: Regis LENORMAND; Antonin HIRSCH; Patrick MARTINEAU; Jose Ignacio HERRANZ- HERRUZO; Alejandro VALERO-NOGUERIA; Paul VINCENT; Jean-Francois DAVID; Laurence LABORDE
- Web page: https://patentgrep.com/patent/US20130278474A1

## CPC

- H01Q 15/246: {rotating the plane of polarisation of a linear polarised wave (guided wave H01P1/165)}
- H01Q 13/22: Longitudinal slot in boundary wall of waveguide or transmission line {(H01Q13/203 takes precedence)}
- H01Q 21/005: {Slotted waveguides arrays}
- H01Q 21/245: {provided with means for varying the polarisation (polarising devices H01Q15/24; tracking by comparing linear polarisation compounds G01S3/146; reducing depolarisation effects H04B7/00; polarisation diversity H04B7/10)}
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)

## Abstract

An antenna with polarization switching comprises a support comprising at least two faces each supporting a plurality of waveguides fed with radiofrequency signals and pierced with apertures disposed so as to illuminate radiating elements placed some distance from the said apertures. For at least one given antenna pointing, the said support is able to toggle between at least two different configurations, the said support being configured so as to place, in the second configuration, the second face in a position identical to that taken by the first face in the first configuration, several radiating elements of the first face being, in the said position, oriented differently from radiating elements of the second face. It applies notably to the switching of antennas embedded onboard moving objects on the ground having to operate high-speed communications with a satellite, in particular a geostationary satellite.

## Claims

### Claim 1

A tracking antenna with polarization switching, comprising:
a support comprising at least two faces each supporting a plurality of waveguides fed with radiofrequency signals and pierced with apertures disposed so as to illuminate radiating elements placed some distance from the said apertures, wherein, for at least one given antenna pointing, said support is able to toggle between at least two different configurations, said support being configured so as to place, in the second configuration, the second face in a position identical to that taken by the first face in the first configuration, several radiating elements of the first face being, in said position, oriented differently from radiating elements of the second face.

### Claim 2 (depends on 1)

The antenna with polarization switching according to claim 1, in which the support is fixed on a swivel axis suitable for toggling between the two configurations by rotation.

### Claim 3 (depends on 2)

The antenna with polarization switching according to claim 2, in which the swivel axis is configured so that the respective positions of the first and of the second face of the support are mutually substituted after rotation of the support by half a revolution about the said axis.

### Claim 4 (depends on 2)

The antenna with polarization switching according to claim 2, in which the swivel axis is parallel to each of the faces.

### Claim 5 (depends on 2)

The antenna with polarization switching according to claim 2, in which the swivel axis, being the first swivel axis, is mounted on a second swivel axis orthogonal to the said first swivel axis.

### Claim 6 (depends on 1)

The antenna with polarization switching according to claim 1, in which the radiating elements are dipoles.

### Claim 7 (depends on 6)

The antenna with polarization switching according to claim 6, in which the dipoles of one and the same face are all oriented in the same direction.

### Claim 8 (depends on 1)

The antenna with polarization switching according to claim 1, in which the first face comprises a number of radiating elements equal to the number of radiating elements present on the second face, the radiating elements being disposed on each of the faces so that to each radiating element of the first face there corresponds a radiating element of the second face whose barycentre in the second configuration is identical to the barycentre of the corresponding radiating element of the first face when it is in the first configuration.

### Claim 9 (depends on 1)

The antenna with polarization switching according to claim 1, in which the waveguides are guides with rectangular cross-section, the apertures being distributed, for each of the waveguides, on a face of the said waveguide alternately on either side of its longitudinal median axis.

### Claim 10 (depends on 1)

The antenna with polarization switching according to claim 1, in which for two adjacent apertures of a waveguide, a radiating element is placed above each of the apertures.