GNSS antenna add-on

Patent metadata

Field	Value
Publication number	US-11313975-B2
Application number	US-201816762924-A
Country	US
Kind code	B2
Filing date	Nov 14, 2018
Priority date	Nov 21, 2017
Publication date	Apr 26, 2022
Grant date	Apr 26, 2022

Abstract

An add-on device configured to reduce the power level of reflected paths of GNSS signals reaching a GNSS receiver's antenna, the associated GNSS receiver set, some equipment embedding the add-on device, and the associated method to reduce the power level of reflected GNSS signals are provided. The GNSS signals are transmitted according to a first polarization, and the add-on device comprises a material configured to be transparent to the first polarization and to reflect GNSS signals polarized according to a second polarization orthogonal to the first polarization.

First claim

The invention claimed is:

1. An add-on device configured to reduce a power level of reflected paths of GNSS signals reaching an antenna of a GNSS receiver, the GNSS signals being transmitted according to a first polarization, the add-on device comprising a material disposed external of the antenna of the GNSS receiver, wherein the material is configured to be transparent to the first polarization and to reflect GNSS signals polarized according to a second polarization orthogonal to the first polarization prior to the antenna of the GNSS receiver.

2. The add-on device of claim 1 , wherein the first polarization is a right hand circular polarization and the second polarization is a left hand circular polarization.

3. The add-on device of claim 1 , wherein said material is configured to operate in at least one of the following frequency bands:
1164 MHz-1214 MHz,
1215 MHz-1254 MHz,
1260 MHz-1300 MHz,
1559 MHz-1610 MHz,
2483.5 MHz-2500 MHz, and
5010 MHz-5030 MHz.

4. A GNSS receiver set comprising:
a GNSS receiver comprising an antenna configured to receive GNSS signals, and
at least one add-on device according to claim 1 .

5. The GNSS receiver set of claim 4 , wherein the said material is a polarization selective surface.

6. The GNSS receiver set of claim 5 , wherein the said material is positioned in front of the GNSS receiver's antenna so as to reflect at least some of said reflected path of GNSS signals before they reach said GNSS receiver's antenna.

7. The GNSS receiver set of claim 5 , wherein the said material is optically transparent.

8. The GNSS receiver set of claim 5 , wherein the said material is a metalized textile.

9. A GNSS receiver case comprising an add-on device according to claim 1 .

10. A windshield comprising an add-on device according to claim 1 , wherein the said material is optically transparent.

11. A method to reduce a power level of reflected paths of GNSS signals reaching an antenna of a GNSS receiver, the GNSS signals being transmitted according to a first polarization, the method comprising positioning at least one add-on device having a material disposed external of the antenna of the GNSS receiver, wherein the material is configured to be transparent to the first polarization, wherein the at least one add-on device is configured to reduce the power level of the reflected paths, wherein the material is configured to reflect GNSS signals polarized according to a second polarization orthogonal to said first polarization prior to the antenna of the GNSS receiver.

Assignees

• Centre Nat Etd Spatiales

Inventors

• Capet Nicolas
• Marmet François-Xavier

Classifications

• G01S19/36

  relating to the receiver frond end · CPC title

• G01S19/35

  Constructional details or hardware or software details of the signal processing chain · CPC title

• G01S19/22 Primary

  Multipath-related issues · CPC title