Title:
HIGH FREQUENCY CIRCUIT, AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/032679
Kind Code:
A1
Abstract:
A high-frequency circuit (1) equipped with a power amplification circuit (10) which corresponds to a first power class which allows a first maximum output power that is equal to or greater than the maximum output power allowed by a power class 2, a filter circuit (60) which is connected to the output end of the power amplification circuit (10) and has a passband that includes the uplink operation band of a band A for frequency division duplexing, a directional coupler (31), and a control circuit (70) for controlling the power amplification circuit (10), wherein: the directional coupler (31) has an input port (311) connected to the output end of the power amplification circuit (10), an output port (312) connected to an antenna connection terminal (101), and a coupling port (313) connected to the control circuit (70) and the external connection terminal (141); and the control circuit (70) restricts amplification of the high-frequency signal via the power amplification circuit (10) on the basis of a first signal from the coupling port (313).
More Like This:
| JP2002261724 | METHOD AND APPARATUS FOR OFDM TRANSMISSION |
| JP2001094532 | TRANSMITTER |
Inventors:
TANAKA SATOSHI (JP)
HITOMI SHINYA (JP)
MORI HIROTSUGU (JP)
HITOMI SHINYA (JP)
MORI HIROTSUGU (JP)
Application Number:
PCT/JP2022/031100
Publication Date:
March 09, 2023
Filing Date:
August 17, 2022
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H04B1/04; H03F1/52; H03F3/24; H03G3/30
Domestic Patent References:
| WO2013099543A1 | 2013-07-04 |
Foreign References:
| JPH1168611A | 1999-03-09 | |||
| JP2018157396A | 2018-10-04 | |||
| JP2015126458A | 2015-07-06 |
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (JP)
Download PDF: