# US 10,320,364 B2 · Radio-frequency module > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,320,364 B2 - Document ID: US10320364B2 - Status: Granted - Kind: B2 - Application number: 15/265,911 - Filed: 2016-09-15 - Published: 2017-07-06 - Granted: 2019-06-11 - Earliest claimed: 2014-04-08 - Assignees: Murata Manufacturing Co., Ltd. - Applicants: Murata Manufacturing Co., Ltd. - Inventors: Yuji Nurikabe; Koichi Ueno - Web page: https://patentgrep.com/patent/US10320364B2 ## CPC - H03H 11/28: Impedance matching networks - H01Q 1/50: Structural association of antennas with earthing switches, lead-in devices or lightning protectors - H03H 7/463: {Duplexers} - H03H 11/344: {Duplexers} - H04B 1/0057: {using diplexing or multiplexing filters for selecting the desired band} - H04B 1/04: Circuits - H04B 1/0458: {Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages (matching circuits in general H03H)} - H04B 1/18: Input circuits, e.g. for coupling to an antenna or a transmission line (coupling networks between antennas or lines and receivers independent of the nature of the receiver H03H) - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H03H 7/38: Impedance-matching networks - H03H: IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (waveguides, resonators, lines or other devices of the waveguide type H01P) - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## 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. ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The radio-frequency module according to claim 1, further comprising: a second-transmission-path phase circuit connected to the second transmission path; wherein phase adjustment is made in the second-transmission-path phase circuit so that impedance matching is maintained in the frequency band of the second radio-frequency signal which is transmitted through the second transmission path; and phase adjustment is made in the second-transmission-path phase circuit so that a phase of the frequency band of the first radio-frequency signal transmitted through the first transmission path in relation to impedance characteristics of the second transmission path shifts to an open side on a Smith chart. ### Claim 3 (depends on 1) The radio-frequency module according to claim 1, wherein the first and second transmission paths or the first and second transmitting-signal input terminals are located at positions at which the first and second transmission paths or the first and second transmitting-signal input terminals are electromagnetically coupled with each other. ### Claim 4 (depends on 3) The radio-frequency module according to claim 3, wherein: the first and second transmission paths are in a multilayer body that includes dielectric layers on which conductive patterns are provided; and the first and second transmitting-signal input terminals are on a back surface of the multilayer body. ### Claim 5 (depends on 4) The radio-frequency module according to claim 4, further comprising: a third transmission path connected to a third selection terminal, which is one of the plurality of selection terminals of the switch IC, is provided; a first separator including a transmit terminal connected to the first transmission path; a second separator including a transmit terminal connected to the second transmission path; and a third separator including a transmit terminal connected to the third transmission path; wherein a frequency band of a transmitting signal of the first radio-frequency signal which is transmitted through the first transmission path overlaps a frequency band of a received signal of the second radio-frequency signal which is transmitted through a second reception path corresponding to the second transmission path; the first, second, and third separators include mounting components to be mounted on the multilayer body; and the third separator is disposed between the first and second separators. ### Claim 6 (depends on 5) The radio-frequency module according to claim 5, wherein a mounted arrangement of the transmit terminal, a receive terminal, and an antenna terminal of each of the first, second, and third separators is the same. ### Claim 7 (depends on 6) The radio-frequency module according to claim 6, wherein a distance between the antenna terminal of the third separator and the receive terminal of the first separator is greater than a distance between the antenna terminal of the third separator and the transmit terminal of the first separator. ### Claim 8 (depends on 6) The radio-frequency module according to claim 6, wherein a distance between the antenna terminal of the second separator and the receive terminal of the third separator is greater than a distance between the antenna terminal of the second separator and the transmit terminal of the third separator. ### Claim 9 (depends on 7) The radio-frequency module according to claim 7, wherein a distance between the antenna terminal of the second separator and the receive terminal of the third separator is greater than a distance between the antenna terminal of the second separator and the transmit terminal of the third separator.