Systems and methods for complementary metal-oxide-semiconductor (CMOS) differential antenna switches using multi-section impedance transformations

A system for an antenna switch, comprising:

• at least one differential amplifier that generates differential outputs;
• a differential antenna switch block, wherein the differential antenna switch block includes at least a first single-ended switch and a second single-ended switch;
• a first matching network to provide a first impedance transformation between the at least one differential amplifier and the differential antenna switch block, wherein the first matching network communicates each of the differential outputs of the at least one differential amplifier to respective ones of the first and second single-ended switches;
• and
• a second matching network to provide a second impedance transformation between the differential antenna switch block and at least one antenna, wherein the second matching network receives differential signals from the differential antenna switch block, and provides at least one system output signal to the at least one antenna;
• wherein the first impedance transformation and the second impedance transformation collectively provide a total impedance transformation to match a first impedance of the differential amplifier with a second impedance of the at least one antenna, and
• further wherein each of the first single-ended switch and the second single-ended switch comprise:
• a series receive switch operable to selectively connect or disconnect a main receive signal path between the at least one antenna and a receiver (RX) block, wherein the series receive switch includes a plurality of first transistors;
• a shunt receive switch operable to selectively connect or disconnect the main receive signal path to or from ground;
• a series transmit switch operable to selectively connect or disconnect a main transmit signal path between a transmitter (TX) block and the at least one antenna;
• and
• a shunt transmit switch operable to selectively connect or disconnect the main transmit signal path to or from ground, wherein the shunt transmit switch includes a plurality of second transistors.