Radio frequency module and communication device

A radio frequency module comprising:

• a first filter having a pass band including a time division duplex (TDD) band;
• a second filter having a pass band including the TDD band;
• a first low-noise amplifier including an input terminal connected to one end of the first filter, and an output terminal connected to a first radio frequency output terminal to externally provide a downlink signal of the TDD band;
• a second low-noise amplifier including an input terminal connected to one end of the second filter, and an output terminal connected to a second radio frequency output terminal to externally provide a downlink signal of the TDD band;
• a first switch configured to switch between connection and disconnection between a first antenna connection terminal and an other end of the first filter;
• a second switch configured to switch between connection and disconnection between a second antenna connection terminal and an other end of the second filter;
• a third switch configured to switch between connection and disconnection between the first antenna connection terminal and a radio frequency input terminal to receive an external uplink signal of the TDD band;
• and
• a fourth switch configured to switch between connection and disconnection between the second antenna connection terminal and the radio frequency input terminal, wherein
• the first antenna connection terminal and the second antenna connection terminal are connected to each other via the third switch and the fourth switch.

A radio frequency module comprising:

• a first filter having a pass band including a time division duplex (TDD) band;
• a second filter having a pass band including the band;
• a first low-noise amplifier including an input terminal connected to one end of the first filter, and an output terminal connected to a first radio frequency output terminal to externally provide a downlink signal of the TDD band;
• a second low-noise amplifier including an input terminal connected to one end of the second filter, and an output terminal connected to a second radio frequency output terminal to externally provide a downlink signal of the TDD band;
• and
• a switch circuit, wherein
• the switch circuit includes
• a first terminal connected to a first antenna connection terminal,
• a second terminal connected to an other end of the first filter,
• a third terminal connected to a radio frequency input terminal for receiving an uplink signal of the band from an outside,
• a fourth terminal connected to a second antenna connection terminal,
• a fifth terminal connected to an other end of the second filter,
• a first switch configured to switch between connection and disconnection between the first terminal and the second terminal,
• a second switch configured to switch between connection and disconnection between the fourth terminal and the fifth terminal,
• a third switch configured to switch between connection and disconnection between the first terminal and the third terminal, and
• a fourth switch configured to switch between connection and disconnection between the third terminal and the fourth terminal, and
• the switch circuit is formed in one die including a plurality of layers, the plurality of layers including a first layer in which the first switch is disposed, a second layer in which the third switch and the fourth switch are disposed, and a third layer in which the second switch is disposed, the second layer being disposed between the first layer and the third layer.