High-frequency switch, laminated high-frequency switch, high-frequency radio unit, and high-frequency switching method

A high-frequency switch comprising:

• a first transmission-reception switching circuit for selectively switching between a signal transfer between an antenna terminal and a first transmitting-circuit terminal and a signal transfer between the antenna terminal and a first receiving-circuit terminal;
• a second transmission-reception switching circuit for selectively switching between a signal transfer between the antenna terminal and a second transmitting-circuit terminal and a signal transfer between the antenna terminal and a second receiving-circuit terminal;
• a first diplexer disposed between the antenna terminal and the first transmission-reception switching circuit and between the antenna terminal and the second transmission-reception switching circuit;
• a first band-pass filter connected to the second receiving-circuit terminal to selectively switch a signal transfer between the second receiving-circuit terminal and a third receiving-circuit terminal and a signal transfer between the second receiving-circuit terminal and a fourth receiving-circuit terminal;
• and
• a second band-pass filter connected to the first receiving-circuit terminal in order to selectively switch a signal transfer between the first receiving-circuit terminal and a fifth receiving-circuit terminal and a signal transfer between the first receiving-circuit terminal and a sixth receiving-circuit terminal.

A high-frequency switching method comprising:

• a step of selectively switching between a signal transfer between an antenna terminal and a first transmitting-circuit terminal and a signal transfer between the antenna terminal and a first receiving-circuit terminal by using a first transmission-reception switching circuit;
• a step of selectively switching between a signal transfer between the antenna terminal and a second transmitting-circuit terminal and a signal transfer between the antenna terminal and a second receiving-circuit terminal by using a second transmission-reception switching circuit;
• a step of selectively switching between a signal transfer between the antenna terminal and the first transmission-reception switching circuit and a signal transfer between the antenna terminal and the second transmission-reception switching circuit by using a first diplexer;
• and
• a step of selectively switching between a signal transfer between the second receiving-circuit terminal and a third receiving-circuit terminal and a signal transfer between the second receiving-circuit terminal and a fourth receiving-circuit terminal by using a first band-pass filter connected to the second receiving-circuit terminal.

A high-frequency switching method comprising:

• a step of selectively switching between a signal transfer between an antenna terminal and a first transmitting-circuit terminal and a signal transfer between the antenna terminal and a first receiving-circuit terminal by using a first transmission-reception switching circuit;
• a step of selectively switching between a signal transfer between the antenna terminal and a second transmitting-circuit terminal and a signal transfer between the antenna terminal and a second receiving-circuit terminal by using a second transmission-reception switching circuit;
• a step of selectively switching between a signal transfer between the antenna terminal and the first transmission-reception switching circuit and a signal transfer between the antenna terminal and the second transmission-reception switching circuit by using a first diplexer;
• a step of selectively switching between a signal transfer between the second receiving-circuit terminal and a third receiving-circuit terminal and a signal transfer between the second receiving-circuit terminal and a fourth receiving-circuit terminal by using a first band-pass filter connected to the second receiving-circuit terminal;
• and
• a step of selectively switching between a signal transfer between the first receiving-circuit terminal and a fifth receiving-circuit terminal and a signal transfer between the first receiving-circuit terminal and a sixth receiving-circuit terminal by using a second band-pass filter connected to the first receiving-circuit terminal.