CROSS REFERENCE TO RELATED APPLICATION

The present application is based on and claims priority to Japanese Patent Application No. 2019-199096 filed on Oct. 31, 2019. The entire disclosure of the above-identified application, including the specification, drawings and claims is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to a radio frequency (RF) module and a communication device.

BACKGROUND

In mobile communication devices such as a mobile phone, the arrangement configuration of circuit elements included in radio frequency front-end circuits is becoming complex, particularly with developments in multiband technologies.

Japanese Unexamined Patent Application Publication (Translation of PCT Application) No. 2014-522216 discloses a circuit configuration of a transceiver (transmission and reception circuit) that includes a plurality of transmitters (transmission paths), a plurality of receivers (reception paths), and a switchplexer disposed between an antenna and the plurality of transmitters and the plurality of receivers. The above-described plurality of transmitters each include a transmission circuit, a power amplifier (PA) (transmission PA), and an output circuit. The above-described plurality of receivers each include a reception circuit, a reception low noise amplifier (LNA), and an input circuit. The output circuit includes a transmission filter, an impedance matching circuit, a duplexer, etc. The input circuit includes a reception filter, an impedance matching circuit, a duplexer, etc. According to the above-described configuration, it is possible to perform at least one of simultaneous transmission, simultaneous reception, or simultaneous transmission and reception, by a switching operation performed by the switchplexer.

SUMMARY

Technical Problems

However, as recognized by the present inventor, when the transceiver (transmission and reception circuit) disclosed by Japanese Unexamined Patent Application Publication (Translation of PCT Application) No. 2014-522216 is configured in a single module as a small-sized front-end circuit of a mobile communication device, there are instances where electromagnetic field coupling occurs between an inductance component of the output circuit of one of the above-described transmitters (transmission paths) and an inductance component of the input circuit of one of the above-described receivers (reception paths). In this case, the isolation between the transmission side and the reception side is decreased. In addition, there arises a problem that a harmonic component of a high-power radio frequency transmission signal amplified by the PA (transmission power amplifier) or an intermodulation distortion component between the high-power radio frequency transmission signal and another radio frequency signal flows into the one of the above-described receivers (reception paths) via the above-described electromagnetic field coupling, leading to deterioration in the reception sensitivity of the one of the above-described receivers (reception paths).

In view of the above-described circumstances, the present disclosure is presented to provide a radio frequency module and a communication device that reduce deterioration in the reception sensitivity.

Solutions

In order to provide such a radio frequency module and such a communication device, a radio frequency module according to one aspect of the present disclosure includes: a module board; a transmission power amplifier configured to amplify a radio frequency transmission signal; a first inductance element mounted on the module board and connected to an output terminal of the transmission power amplifier; a reception low noise amplifier configured to amplify a radio frequency reception signal; a second inductance element mounted on the module board and connected to an input terminal of the reception low noise amplifier; and a first wall body disposed on the module board and made of plated metal. In the radio frequency module, the first wall body is disposed between the first inductance element and the second inductance element in a plan view of the module board.

Advantageous Effects

According to the present disclosure, it is possible to provide a radio frequency module and a communication device that reduce deterioration in the reception sensitivity.

