Satellite ground station to receive signals with different polarization modes

• US 7,526,249 B2
• Filed: 01/12/2006
• Issued: 04/28/2009
• Est. Priority Date: 07/13/2004
• Status: Expired due to Fees

• Current Assignee: Mediaur Technologies, Inc.
• Original Assignee: Mediaur Technologies, Inc.
• Inventors: Peting, Mark, Waltman, Steve
• Primary Examiner(s): PHAN, THO GIA
• Application Number:
  US11/332,381
• Publication Number:
  US 20060128336A1
• Time in Patent Office: 1,202 Days
• Field of Search: 455/12.1, 455/273, 455/276.1, 343/754, 343/757, 343/776
• US Class Current: 455/12.1
• 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: H04B 7/10 Polarisation diversity; Directional diversity

Abstract

A satellite ground station to receive signals with different polarization modes is described. In one example, the system includes a method of receiving a signal from a satellite at a feed, producing a first signal having a first polarization and a second signal having a second orthogonal polarization from the feed signal, and synthesizing a third signal having a third polarization different from the first and second signal and a fourth signal having fourth polarization orthogonal to the third polarization.

Claims

1. A method comprising:

receiving a signal from a first satellite at a first feed;

receiving a signal from a second satellite at a second feed;

producing a first signal having a first polarization and a second signal having a second orthogonal polarization from the signal from each feed;

phase shifting the signal from each of the two feeds;

offsetting the frequency of the phase-shifted signals from each of the two feeds; and

combining the phase-shifted, offset signal with the second signal from each feed, respectively to reduce interference from the second satellite on the signal from the first satellite.

2. The method of claim 1, wherein combining comprises offsetting and combining the signals from the two polarizations after the signals from the multiple feeds are combined.

3. The method of claim 1, wherein combining comprises offsetting and combining the signals and the signals from the two polarizations before the signals from the multiple feeds are combined.

4. The method of claim 3, wherein the signals from the two polarizations are offset before they are downconverted.

5. The method of claim 4, wherein the signals from the two polarizations are offset from each other after they are downconverted.

6. The method of claim 3, wherein the signals from the two polarizations are offset from each other by downconverting them with different local oscillator frequencies.