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US 2026/0303028 A1Published application
Radio-frequency module, communication apparatus, and control method
AssigneeMurata Manufacturing Co., Ltd.
InventorKenji TAHARA
Life of this patent
Estimating the term…
Abstract
A radio-frequency module performs transmission and reception of a signal via an antenna. In radio-frequency module, since impedance is adjusted using the switches that are not provided on the transmission path of the signal by appropriately setting the phase of the output signal from each amplifier and/or the driving state of each amplifier and the conducting state of each switch in transmission and reception, it is possible to appropriately switch between the transmission operation and the reception operation. In addition, the radio waves received as differential signals are capable of being inputted into the reception circuit in the same phase.
Claims12
A radio-frequency module configured to perform transmission and reception of a signal via an antenna, the radio-frequency module comprising:
- a first terminal and a second terminal;
- a third terminal and a fourth terminal, which are configured to connect to the antenna;
- a first amplifier having an input terminal electrically connected to the first terminal;
- a second amplifier having an input terminal electrically connected to the first terminal;
- a third amplifier having an output terminal connected to the second terminal;
- a first transmission line which is configured to connect between an output terminal of the first amplifier and an output terminal of the second amplifier, and which has a length equal to ¼ of a wavelength of the signal;
- a second transmission line which is configured to connect to the output terminal of the first amplifier, and which has a length equal to ¼ of the wavelength of the signal;
- a third transmission line which has a first end connected to the second transmission line and a second end connected to the third terminal, and which has a length equal to ½ of the wavelength of the signal;
- a fourth transmission line which is configured to connect to the output terminal of the second amplifier, and which has a length equal to ¼ of the wavelength of the signal;
- a fifth transmission line which has a first end connected to the fourth transmission line and a second end connected to the fourth terminal, and which has a length equal to ¼ of the wavelength of the signal;
- a sixth transmission line which is configured to connect between the first end of the third transmission line and the first end of the fifth transmission line, and which has a length equal to ¼ of the wavelength of the signal;
- a seventh transmission line which is configured to connect between an input terminal of the third amplifier and the first end of the fifth transmission line, and which has a length equal to ¼ of the wavelength of the signal;
- a first switch configured to connect between the output terminal of the first amplifier and ground;
- and
- a second switch configured to connect between the output terminal of the second amplifier and ground.
12 more elements
A control method used in a radio-frequency module that performs transmission and reception of a signal via an antenna,
- wherein the radio-frequency module comprises:
- a first terminal and a second terminal,
- a third terminal and a fourth terminal, which are configured to connect to the antenna,
- a first amplifier having an input terminal electrically connected to the first terminal,
- a second amplifier having an input terminal electrically connected to the first terminal,
- a third amplifier having an output terminal connected to the second terminal,
- a first transmission line which is configured to connect between an output terminal of the first amplifier and an output terminal of the second amplifier, and which has a length equal to ¼ of a wavelength of the signal,
- a second transmission line which is configured to connect to the output terminal of the first amplifier, and which has a length equal to ¼ of the wavelength of the signal,
- a third transmission line which has a first end connected to the second transmission line and a second end connected to the third terminal, and which has a length equal to ½ of the wavelength of the signal,
- a fourth transmission line which is configured to connect to the output terminal of the second amplifier, and which has a length equal to ¼ of the wavelength of the signal,
- a fifth transmission line which has a first end connected to the fourth transmission line and a second end connected to the fourth terminal, and which has a length equal to ¼ of the wavelength of the signal,
- a sixth transmission line which is configured to connect between the first end of the third transmission line and the first end of the fifth transmission line, and which has a length equal to ¼ of the wavelength of the signal,
- a seventh transmission line which is configured to connect between an input terminal of the third amplifier and the first end of the fifth transmission line, and which has a length equal to ¼ of the wavelength of the signal,
- a first switch configured to connect between the output terminal of the first amplifier and ground, and
- a second switch configured to be connected between the output terminal of the second amplifier and ground, the control method comprising:
- setting each of the first switch and the second switch to a conducting state when the signal supplied from each of the third terminal and the fourth terminal is supplied to the input terminal of the third amplifier;
- and
- setting each of the first switch and the second switch to a non-conducting state when the signal outputted from each of the first amplifier and the second amplifier is outputted to the third terminal.
15 more elements
Dependencies are inferred from the claim text.