US 10,320,364 B2Granted

Radio-frequency module

AssigneeMurata Manufacturing Co., Ltd.

InventorsYuji Nurikabe, Koichi Ueno

Life of this patent

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Abstract

A radio-frequency module includes duplexers and a phase circuit. A first transmitting-signal input terminal is connected to the duplexer, while a second transmitting-signal input terminal is connected to the duplexer. The phase circuit is connected between the first transmitting-signal input terminal and the duplexer. The phase circuit performs phase adjustment so that impedance matching between the first transmitting-signal input terminal and the duplexer is performed in the fundamental frequency band of a first transmitting signal, and so that the phase of the frequency band of a second transmitting signal in relation to the impedance characteristics of a first transmission path which ranges from the first transmitting-signal input terminal to the duplexer with the phase circuit provided therebetween appears in an open side on a Smith chart.

Claims9

Dependent claims

A radio-frequency module comprising:

a switch IC that selects a selected selection terminal from among a plurality of selection terminals and connects the selected selection terminal to a common terminal connected to an antenna;
a first transmitting-signal input terminal that is connected to a first selection terminal, which is one of the plurality of selection terminals, with a first transmission path provided therebetween;
a second transmitting-signal input terminal that is connected to a second selection terminal, which is one of the plurality of selection terminals, with a second transmission path provided therebetween;
and
a first-transmission-path phase circuit connected to the first transmission path;
wherein
phase adjustment is made in the first-transmission-path phase circuit so that impedance matching is maintained in a frequency band of a first radio-frequency signal which is transmitted through the first transmission path;
and
phase adjustment is made in the first-transmission-path phase circuit so that a phase of a frequency band of a second radio-frequency signal transmitted through the second transmission path in relation to impedance characteristics of the first transmission path shifts to an open side on a Smith chart.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/265,911Filed 15 Sep 2016 · continuation
Priority: JP 2014-0790958 Apr 2014
Published: US 2017/0194940 A16 Jul 2017
Granted: 11 Jun 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

H03H 11/28
Multiple-port networks: impedance matching networks
H01Q 1/50
Details of, or arrangements associated with, antennas: structural association of antennas with earthing switches, lead-in devices or lightning…
H03H 7/463
Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source: duplexers
H03H 11/344
Networks for connecting several sources or loads working on different frequencies or frequency bands, to a common load or source: duplexers

Family

PCT/JP2015/057246Parent of this continuation · filed 12 Mar 2015
US 2017/0194940 A1Pre-grant publication · published 6 Jul 2017
US 10,320,364 B2This patent

From the US filing history. Foreign family members aren’t listed.

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