High frequency circuit, high frequency circuit component, and communication apparatus

摘要

The present invention provides a high frequency circuit, a high frequency circuit component, and a communication apparatus that uses the same, the circuit capable of being used for different communication systems, having a high receiving sensitivity and restraining the loss of transmission power. A high frequency circuit of the present invention includes: a first antenna terminal (ANT1) and a second antenna terminal (ANT2); and at least a transmitting terminal (Tx) and a first and a second receiving terminal (Rx1, Rx2) for a first communication system. With each switch, the first and the second receiving terminals (Rx1, Rx2) can be each simultaneously connected to the first and the second antenna terminals (ANT1, ANT2). Also, the transmitting terminal (Tx) is selectively connectable to either of the first and second antenna terminals (ANT1, ANT2).

主权项

1. A high frequency circuit component comprising a high frequency circuit, wherein
the high frequency circuit includes a switching circuit, a first and a second antenna terminal, a transmitting terminal and a first and a second receiving terminal for a first communication system, a first filter circuit disposed on a reception path connecting the switching circuit to the first receiving terminal, and a second filter circuit disposed on a reception path connecting the switching circuit to the second receiving terminal, the switching circuit allows the transmitting terminal to be selectively connectable to either of the first and second antenna terminals, allows the first receiving terminal to switch connection and disconnection to and from the first antenna terminal, and allows the second receiving terminal to switch connection and disconnection to and from the second antenna terminal, the high frequency circuit component includes a laminated body of a plurality of layers on which electrode patterns are formed, and in the laminated body, a plurality of regions are electromagnetically partitioned by a shielding structure, wherein at least a part of electrode patterns of the first filter circuit is formed in a first region of among the plurality of regions and at least a part of the second filter circuit is formed in a second region among the plurality of regions as seen in a lamination direction of the laminated body.