SWITCHING RADIOFREQUENCY CHAINS

1 . A communication system comprising:

a first radiofrequency chain configured to transmit or receive information on a first channel;

a second radiofrequency chain configured to transmit or receive information on a second channel;

a third radiofrequency chain configured to operate in a standby mode while the first radiofrequency chain and second radiofrequency chain are operational;

radiofrequency switches configured to (i) switch between coupling the first radiofrequency chain and the third radiofrequency chain to a first antenna feed port for the first channel, and (ii) switch between coupling the second radiofrequency chain and the third radiofrequency chain to a second antenna feed port for the second channel; and

a controller configured to (i) monitor the first radiofrequency chain and the second radiofrequency chain and (ii) respond to a failure detected by the monitoring, including by coupling the third radiofrequency chain to the first antenna feed port if the failure is detected for the first radiofrequency chain or by coupling the third radiofrequency chain to the second antenna feed port if the failure is detected for the second radiofrequency chain.

2 . The communication system of claim 1 , wherein the first channel is a first wireless channel of a satellite communication system, and wherein the second channel is a second wireless channel of the satellite communication system.

3 . The communication system of claim 1 , wherein the first channel is first physical channel in which communication occurs over a particular frequency band with a left-hand circular polarization;

wherein the second channel is second physical channel in which communication occurs over the particular frequency band with a left-hand circular polarization; and

wherein the first antenna feed port is coupled to a right-hand circular polarized antenna and is configured to receive signals for transmission with a right-hand circular polarization, and wherein the second antenna feed port is coupled to a left-hand circular polarized antenna and is configured to receive signals for transmission with a left-hand circular polarization.

4 . The communication system of claim 1 , wherein the first radiofrequency chain, the second radiofrequency chain, and the third radiofrequency chain are each transmit chains.

5 . The communication system of claim 4 , wherein, to determine whether the third radiofrequency chain operates properly, the controller is configured to (i) input test data to the third radiofrequency chain and (ii) compare output that the third radiofrequency chain produces in response to the test data with reference information.

6 . The communication system of claim 1 , wherein the first radiofrequency chain, the second radiofrequency chain, and the third radiofrequency chain are each receive chains.

7 . The communication system of claim 1 , wherein, to determine whether the third radiofrequency chain operates properly, the controller is configured to (i) input test signals representing known data to the third radiofrequency chain and (ii) compare signals in the third radiofrequency chain or received data from the third radiofrequency chain with reference information.

8 . A method performed by one or more processors of a communication system, the method comprising:

operating (i) a first radiofrequency chain configured to transmit or receive information on a first channel, (ii) a second radiofrequency chain configured to transmit or receive information on a second channel, and (iii) a third radiofrequency chain in a standby mode in which the third radiofrequency chain does not transmit or receive information over a wireless channel;

monitoring (i) signals produced by the first radiofrequency chain and the second radiofrequency chain or (ii) a status of the first radiofrequency chain and the second radiofrequency chain; and

setting radiofrequency switches of the communication system based on the monitoring, wherein the radiofrequency switches are configured to (i) switch between coupling the first radiofrequency chain and the third radiofrequency chain to a first antenna feed port for the first channel, and (ii) switch between coupling the second radiofrequency chain and the third radiofrequency chain to a second antenna feed port for the second channel.

9 . The method of claim 8 , comprising:

detecting a failure in the first radiofrequency chain or the second radiofrequency chain based on the monitoring; and

in response to detecting the failure, causing the radiofrequency switches to couple the third radiofrequency chain to one of the antenna feed ports in place of the radiofrequency chain in which the failure is detected.

10 . The method of claim 8 , wherein the first channel is a first wireless channel of a satellite communication system, and wherein the second channel is a second wireless channel of the satellite communication system.

11 . The method of claim 8 , wherein the first channel is first physical channel in which communication occurs over a particular frequency band with a left-hand circular polarization;

wherein the second channel is second physical channel in which communication occurs over the particular frequency band with a left-hand circular polarization; and

wherein the first antenna feed port is coupled to a right-hand circular polarized antenna and is configured to receive signals for transmission with a right-hand circular polarization, and wherein the second antenna feed port is coupled to a left-hand circular polarized antenna and is configured to receive signals for transmission with a left-hand circular polarization.

12 . The method of claim 8 , wherein the first radiofrequency chain, the second radiofrequency chain, and the third radiofrequency chain are each transmit chains.

13 . The method of claim 8 , wherein the first radiofrequency chain, the second radiofrequency chain, and the third radiofrequency chain are each receive chains.

14 . The method of claim 8 , further comprising:

providing a test input to the third radiofrequency chain;

receiving a test output that the third radiofrequency chain produced in response to the test input; and

determining, based on the test output, that the third radiofrequency chain is operating correctly;

wherein causing the radiofrequency switches to couple the third radiofrequency chain to one of the antenna feed ports is based on determining that the third radiofrequency chain is operating correctly.

15 . One or more non-transitory computer-readable storage media coupled to one or more processors and having instructions stored thereon which, when executed by the one or more processors, cause the one or more processors to perform operations comprising:

operating (i) a first radiofrequency chain configured to transmit or receive information on a first channel, (ii) a second radiofrequency chain configured to transmit or receive information on a second channel, and (iii) a third radiofrequency chain in a standby mode in which the third radiofrequency chain does not transmit or receive information over a wireless channel;

monitoring (i) signals produced by the first radiofrequency chain and the second radiofrequency chain or (ii) a status of the first radiofrequency chain and the second radiofrequency chain; and

setting radiofrequency switches based on the monitoring, wherein the radiofrequency switches are configured to (i) switch between coupling the first radiofrequency chain and the third radiofrequency chain to a first antenna feed port for the first channel, and (ii) switch between coupling the second radiofrequency chain and the third radiofrequency chain to a second antenna feed port for the second channel.

16 . The one or more non-transitory computer-readable storage media of claim 15 , wherein the operations comprise:

detecting a failure in the first radiofrequency chain or the second radiofrequency chain based on the monitoring; and

in response to detecting the failure, causing the radiofrequency switches to couple the third radiofrequency chain to one of the antenna feed ports in place of the radiofrequency chain in which the failure is detected.

17 . The one or more non-transitory computer-readable storage media of claim 15 , wherein the first channel is a first wireless channel of a satellite communication system, and wherein the second channel is a second wireless channel of the satellite communication system.

18 . The one or more non-transitory computer-readable storage media of claim 15 , wherein the first channel is first physical channel in which communication occurs over a particular frequency band with a left-hand circular polarization;

wherein the second channel is second physical channel in which communication occurs over the particular frequency band with a left-hand circular polarization; and

wherein the first antenna feed port is coupled to a right-hand circular polarized antenna and is configured to receive signals for transmission with a right-hand circular polarization, and wherein the second antenna feed port is coupled to a left-hand circular polarized antenna and is configured to receive signals for transmission with a left-hand circular polarization.

19 . The one or more non-transitory computer-readable storage media of claim 15 , wherein the first radiofrequency chain, the second radiofrequency chain, and the third radiofrequency chain are each transmit chains.

20 . The one or more non-transitory computer-readable storage media of claim 15 , wherein the first radiofrequency chain, the second radiofrequency chain, and the third radiofrequency chain are each receive chains.