# US 2013/0281167 A1 · Apparatus and method for matching antenna impedance in wireless communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0281167 A1 - Document ID: US20130281167A1 - Status: Published application - Kind: A1 - Application number: 13/868,464 - Filed: 2013-04-23 - Published: 2013-10-24 - Earliest claimed: 2012-04-23 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Dong-Kyoon CHO; Seong-Wook SONG - Web page: https://patentgrep.com/patent/US20130281167A1 ## CPC - H04W 52/24: using SIR [Signal to Interference Ratio] or other wireless path parameters - H04B 17/12: of transmit antennas, e.g. of the amplitude or phase - H04W 52/245: {taking into account received signal strength} - H04W 52/146: {Uplink power control} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract An apparatus and method for matching antenna impedance in a mobile station are provided. In implementation, a mobile station receives power control information including information for controlling transmit power of the mobile station, generates matching control information for antenna impedance matching based on the received power control information, and performs antenna impedance matching depending on the generated matching control information. ## Claims ### Claim 1 A mobile station comprising: a receiver for receiving power control information including information for controlling transmit power of the mobile station; a matching controller for generating matching control information for antenna impedance matching based on the received power control information; and an antenna matcher for performing antenna impedance matching depending on the generated matching control information. ### Claim 2 (depends on 1) The mobile station of claim 1, wherein the power control information is generated based on received signal strength measured in a base station. ### Claim 3 (depends on 2) The mobile station of claim 2, wherein the matching controller determines a transmit power variation of the mobile station based on the received power control information, and generates the matching control information based on the determined transmit power variation. ### Claim 4 (depends on 1) The mobile station of claim 1, wherein the matching controller generates matching control information including a matching value for adjusting antenna impedance based on the received power control information. ### Claim 5 (depends on 4) The mobile station of claim 4, wherein the antenna matcher performs the antenna impedance matching by using the matching value included in the generated matching control information. ### Claim 6 (depends on 1) The mobile station of claim 1, further comprising a power amplifier which is situated in a previous stage of the antenna matcher and amplifies a signal at a magnitude that is determined based on the received power control information. ### Claim 7 A method for matching antenna impedance in a mobile station, the method comprising: receiving power control information including information for controlling transmit power of the mobile station; generating matching control information for antenna impedance matching based on the received power control information; and performing antenna impedance matching depending on the generated matching control information. ### Claim 8 (depends on 7) The method of claim 7, wherein the power control information is generated based on received signal strength measured in a base station. ### Claim 9 (depends on 8) The method of claim 8, wherein the generating of the matching control information comprises: determining a transmit power variation of the mobile station based on the received power control information; and generating the matching control information based on the determined transmit power variation. ### Claim 10 (depends on 7) The method of claim 7, wherein the generating of the matching control information comprises generating the matching control information including a matching value for adjusting antenna impedance based on the received power control information. ### Claim 11 (depends on 10) The method of claim 10, wherein the performing of the antenna impedance matching comprises performing the antenna impedance matching by using the matching value included in the generated matching control information. ### Claim 12 (depends on 7) The method of claim 7, further comprising amplifying a signal at a magnitude that is determined based on the received power control information. ### Claim 13 An apparatus for matching antenna impedance, the apparatus comprising: an antenna matcher for, upon receiving matching control information generated based on power control information, performing antenna impedance matching depending on the received matching control information, wherein the power control information includes information for controlling transmit power of a mobile station, and is received from a base station. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein the received matching control information includes a matching value for adjusting antenna impedance determined based on the power control information. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the antenna matcher performs the antenna impedance matching by using the matching value included in the received matching control information. ### Claim 16 (depends on 13) The apparatus of claim 13, wherein the power control information is generated based on received signal strength measured in the base station. ### Claim 17 A method for matching antenna impedance, the method comprising: determining whether matching control information generated based on power control information is received; and upon receiving the matching control information, performing antenna impedance matching depending on the received matching control information, wherein the power control information includes information for controlling transmit power of a mobile station, and is received from a base station. ### Claim 18 (depends on 17) The method of claim 17, wherein the received matching control information includes a matching value for adjusting antenna impedance determined based on the power control information. ### Claim 19 (depends on 18) The method of claim 18, wherein the performing of the antenna impedance matching comprises performing the antenna impedance matching by using the matching value included in the received matching control information. ### Claim 20 (depends on 17) The method of claim 17, wherein the power control information is generated based on received signal strength measured in the base station.