T/R module for satellite TT and C ground link

A transmit and receive (T/R) module, having at least one receive channel and at least one transmit channel, each of said at least one receive channel and at least one transmit channel having means for selecting a polarization of opposite sense to said other channel, being responsive to control signals so as to provide means for electronic beam scanning, beam forming and radiated power when used in conjunction with a plurality of T/R modules and radiating and receiving elements in a phased-array antenna, comprising:

• a radio frequency (RF) section, further comprising for each of said at least one receive channel and said at least one transmit channel
• a diplexed antenna port interface into which is input or output an uplink signal or a downlink signal, respectively;
• a transmit signal input path;
• further comprising a phase shifter for varying the phase of said uplink signal;
• a first switch to alternately turn said uplink signal on and off;
• and attenuator for varying the power level of said uplink signal;
• a first amplifier for preamplifying said uplink signal;
• a first double throw switch for setting transmit polarization of said uplink signal by selectably routing said transmit signal path through one of two power combiners, the output of said one of two power combiners being routed through one of two inputs of a 90 degree hybrid coupler;
• a power amplifier for amplifying a quadrature output component of said 90 degree hybrid coupler prior to being input into said diplexed antenna port interface;
• a received signal output path;
• further comprising a low noise amplifier which amplifies said downlink signal output from said diplexed, bidirectional antenna port interface;
• a 90 degree hybrid coupler which divides said downlink signal into quadrature components;
• a power divider for dividing each of said quadrature components;
• a second single pole, double throw switch for setting receive polarization by selecting either of said power divided quadrature components as receive signal outputs;
• a first amplifier for providing gain to said selected signal;
• a phase shifter for varying the phase of said selected signal so as to provide antenna receive beam steering;
• a second switch to turn said selected signal alternatively on or off;
• an attenuator for varying the power level of said selected signal;
• and a second amplifier for providing gain to said selected signal;
• and
• a digital section;
• further comprising an interface to an antenna control computer for controlling the phase, polarization and amplitude of said received signal output path and said transmit signal input path;
• a built-in-test (BIT) circuit;
• and
• a power supply circuit.