Antenna switch modules and methods of making the same

An antenna switch module that interconnects a transceiver and an antenna, the module comprising:

• a first transmit port and a first receive port that operate at a first frequency range;
• a second transmit port and a second receive port that operate at a second frequency range;
• a plurality of switches that selectively connect the first transmit port, the first receive port, and the second receive port to an antenna;
• and
• a resonance impedance circuit having components selected to provide a high impedance path when signals are being transmitted at the first frequency range, the resonance impedance circuit connecting the second transmit port to the antenna and one of the plurality of switches connecting the second receive port to the antenna, and the resonance impedance circuit including a parallel LC circuit with a shunt pre-match capacitor, the shunt pre-match capacitor positioned on the second receive port to resonate out an inductive load seen on a path between second transmit port and the antenna when the second receive port is selectively connected to the antenna.

An antenna switch module that interconnects a transceiver and an antenna, the module comprising:

• a first transmit port and a first receive port that operate at a first frequency;
• a second transmit port and a second receive port that operate at a second frequency;
• a plurality of switches that selectively connect the first transmit port, the first receive port, and one of the second transmit port or the second receive port to a common antenna for the first and second transmit and receive ports;
• and
• a resonance impedance circuit that connects at least one of the second transmit port or the second receive port to the antenna, the resonance impedance circuit having components selected to provide a high impedance path when signals are being transmitted at the first frequency, the resonance impedance circuit including a ¼ wave impedance transformer including a parallel LC circuit component in series with an inductor,
• a third transmit port and a third receive port that operate on a third frequency, either the third transmit port or third receive port having a first resonance circuit that resonates at the first frequency so as to isolate the third transmit port or third receive port at that frequency.

An antenna switch module for switching signals between at least one antenna and a transceiver, the module comprising:

• a first transmit port and a first receive port that operate at a first frequency range and are positioned between the antenna and the transceiver;
• a second transmit port and a second receive port that operate at a second frequency range and are positioned between the antenna and the transceiver;
• a plurality of controllable switching devices respectively positioned in series between the antenna and the first transmit, first receive, and second receive ports so that the first transmit, first receive, and second receive ports are selectively connectable to or isolatable from the antenna;
• and
• a resonance circuit connected in series between the second transmit port and the antenna and selected to resonate at the first frequency range to create an impedance sufficient to isolate the second transmit port from the antenna when the antenna is receiving or transmitting signals at the first frequency range, the second transmit port being continuously connected to the antenna by the resonance circuit, wherein the resonance circuit includes a parallel LC circuit with a shunt pre-match capacitor, the shunt pre-match capacitor positioned on the second receive port to resonate out an inductive load seen on a path between the second transmit port and the antenna when the second receive port is selectively connected to the antenna.

A wireless device comprising:

• at least one antenna;
• a transceiver;
• and
• an antenna switch module including a first transmit port and a first receive port that operate at a first frequency range and are positioned between the antenna and the transceiver, the module further including a second transmit port and a second receive port that operate at a second frequency range and are positioned between the antenna and the transceiver, the module further including a plurality of controllable switching devices respectively positioned in series between the antenna and the first transmit, first receive, and second receive ports so that the first transmit, first receive and second receive ports are selectively connectable to or isolatable from the antenna, and the module further including a resonance circuit that is connected in series between the second transmit port and the antenna and is selected to resonate at the first frequency range to create an impedance sufficient to isolate the second transmit port from the antenna when the antenna is operating at the first frequency range, the second transmit port being continuously connected to the antenna by the resonance circuit;
• and
• a third transmit port and a third receive port that operate on a third frequency range, either the third transmit port or third receive port having a first resonance circuit that resonates at the first frequency range so as to isolate the third transmit port or third receive port at that frequency range.

A wireless device comprising:

• at least one antenna;
• a transceiver;
• and
• an antenna switch module including a first transmit port and a first receive port that operate at a first frequency range and are positioned between the antenna and the transceiver, the module further including a second transmit port and a second receive port that operate at a second frequency range and are positioned between the antenna and the transceiver, the module further including a plurality of controllable switching devices respectively positioned in series between the antenna and the first transmit, first receive, and second receive ports so that the first transmit, first receive and second receive ports are selectively connectable to or isolatable from the antenna, and the module further including a resonance circuit that is connected in series between the second transmit port and the antenna and is selected to resonate at the first frequency range to create an impedance sufficient to isolate the second transmit port from the antenna when the antenna is operating at the first frequency range, the second transmit port being continuously connected to the antenna by the resonance circuit, the resonance circuit including a ¼ wave impedance transformer including a parallel LC circuit component in series with an inductor.

A wireless device comprising:

• at least one antenna;
• a transceiver;
• and
• an antenna switch module including a first transmit port and a first receive port that operate at a first frequency range and are positioned between the antenna and the transceiver, the module further including a second transmit port and a second receive port that operate at a second frequency range and are positioned between the antenna and the transceiver, the module further including a plurality of controllable switching devices respectively positioned in series between the antenna and the first transmit, first receive, and second receive ports so that the first transmit, first receive and second receive ports are selectively connectable to or isolatable from the antenna, and the module further including a resonance circuit that is connected in series between the second transmit port and the antenna and is selected to resonate at the first frequency range to create an impedance sufficient to isolate the second transmit port from the antenna when the antenna is operating at the first frequency range, the second transmit port being continuously connected to the antenna by the resonance circuit, the resonance circuit including a parallel LC circuit with a shunt pre-match capacitor, the shunt pre-match capacitor positioned on the second receive port to resonate out an inductive load seen on a path between the second transmit port and the antenna when the second receive port is selectively connected to the antenna.