Dual lna/pa with configurable polarisation control
OwnerAlan Chi Wai WONG, Ian LANKSHEARinventors
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Abstract
An antenna circuit for processing a signal received by at least one antenna, the antenna circuit comprising a first input port and second input port, each configured to receive a feed from the at least one antenna, a 90 degree phase shifter arranged to shift a signal received at the first input port with respect to a signal received at the second input port by 90 degrees, at least one switchable phase shifter, connected to one of the first input port and the second input port, configured to impart a phase shift of 0 or 180 degrees on a received signal, a combiner, connected to the at least one switchable phase shifter, configured to output the sum of received signals; and a principal output port.
Claims25
An antenna circuit for processing a signal received by at least one antenna, the antenna circuit comprising:
- a first input port and second input port, each configured to receive a feed from the at least one antenna;
- a 90 degree phase shifter arranged to shift a signal received at the first input port with respect to a signal received at the second input port by 90 degrees;
- at least one switchable phase shifter, connected to one of the first input port and the second input port, configured to impart a phase shift of 0 or 180 degrees on a received signal;
- a combiner, connected to the at least one switchable phase shifter, configured to output the sum of received signals;
- and
- a principal output port.
An antenna circuit for processing a signal before transmission of the signal by at least one antenna, the antenna circuit comprising:
- a principal input port;
- a power splitter, connected to the principal input port, configured to divide a signal received from the principal input port;
- at least one switchable phase shifter, connected to an output of the power splitter, and configured to impart a phase shift of 0 or 180 degrees on a received signal;
- two output ports, wherein at least one of the output ports is connected to the at least one switchable phase shifter;
- a 90 degree phase shifter arranged in one of the outputs of the power splitter.
A method of processing a signal received by at least one antenna, the method comprising:
- receiving two input signals from two output channels of the at least one antenna or from two antennas;
- imparting a 90 degree phase shift on one of the two input signals;
- imparting a switchable phase shift of 0 or 180 degrees on one of the two signals;
- combining the two signals after said steps of imparting a 90 degree phase shift and imparting a switchable 0 or 180 degree phase shift;
- output a combined signal.
A method of processing a signal before transmission of the signal by at least one antenna, the method comprising:
- receiving a signal;
- splitting the signal into two signals;
- imparting a switchable phase shift of 0 or 180 degrees on one of the two signals;
- imparting a 90 degree phase shift on one of the two signals;
- transmitting the two signals to two input ports of an antenna, or to two antennas.
Dependencies are inferred from the claim text.