High-power hybrid SPDT switch

A single-pole double-throw hybrid transmit/receive switch assembly comprising:

• an antenna port, a transmit port, and a receive port;
• a receive sub-assembly including a receive series switching element connected in series between the antenna port and the receive port, and a receive shunt switching element connected in shunt between the receive port and ground, the receive series switching element being a PIN diode, and the receive shunt switching element being a first FET device;
• a transmit sub-assembly including a transmit series switching element connected in series between the antenna port and the transmit port, and a transmit shunt switching element connected in shunt between the transmit port and ground, the transmit series switching element being a second FET device, and the transmit shunt switching element being a third FET device;
• and
• bias control circuitry coupled to a cathode of the PIN diode and having a receive series bias control contact configured to receive a first bias control voltage to control a bias condition of the PIN diode, the first bias control voltage having a voltage value that is one of zero volts and a first positive value.

A hybrid transmit/receive switching assembly comprising:

• an antenna port, a transmit port, and a receive port;
• a plurality of FET devices implemented on a first substrate, each FET device of the plurality of FET devices configured to receive a respective first bias control signal and including a first FET device coupled between the receive port and ground, a second FET device coupled between the antenna port and the transmit port, and a third FET device coupled between the transmit port and ground;
• a PIN diode implemented on a second substrate separate from the first substrate and having a cathode coupled to the receive port and an anode coupled to each of the antenna port and the transmit port;
• and
• bias control circuitry coupled to the PIN diode and configured to receive a second bias control signal, each respective first bias control signal and the second bias control signal together configured to operate the hybrid transmit/receive switching assembly between a transmit mode in which the PIN diode is reverse biased, RF signal flow is enabled from the transmit port to the antenna port, and isolation is provided between the antenna port and the receive port, and a receive mode in which the PIN diode is forward biased, RF signal flow is enabled from the antenna port to the receive port, and isolation is provided between the antenna port and the transmit port.