# US 2010/0164640 A1 · Method and apparatus for adaptive impedance matching > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0164640 A1 - Document ID: US20100164640A1 - Status: Published application - Kind: A1 - Application number: 12/722,162 - Filed: 2010-03-11 - Published: 2010-07-01 - Earliest claimed: 2006-11-08 - Assignees: Paratek Microwave, Inc. - Inventors: WILLIAM E. McKINZIE, III - Web page: https://patentgrep.com/patent/US20100164640A1 ## CPC - H03H 7/40: Automatic matching of load impedance to source impedance - H01Q 1/50: Structural association of antennas with earthing switches, lead-in devices or lightning protectors - H03H 7/38: Impedance-matching networks - H03H 11/30: Automatic matching of source impedance to load impedance - H04B 1/44: Transmit/receive switching - H04L 25/0278: {Arrangements for impedance matching} - H04W 52/18: TPC being performed according to specific parameters - 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) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A system that incorporates teachings of the present disclosure may include, for example, a matching network having one or more controllable variable reactive elements coupled to at least one input port and at least one output port. The one or more controllable variable reactive elements can be adapted to increase power transferred from the at least one input port to the at least one output port responsive to signals generated by a controller adapted to adjust one or more reactances within the matching network according to a mode of operation of a device detected by the controller. Additional embodiments are disclosed. ## Claims ### Claim 1 An apparatus, comprising: an RF matching network coupled to at least one RF input port and at least one RF output port and comprising one or more controllable variable reactive elements, wherein said RF matching network is adapted to increase signal power transferred from said at least one input port to said at least one output port by varying signals applied to said controllable variable reactive elements, wherein said one or more controllable variable reactive elements are coupled to a circuit adapted to map one or more control signals that are output from a controller, and wherein said controller manages one or more reactances within the matching network according to a mode of operation of a communication device. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the mode of operation comprises information that describes one of a mode of transmitting RF signals by the communication device, or a mode of receiving RF signals by the communication device. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the mode of operation comprises information describing each of one or more frequencies of signals transferred from the at least one input port to the at least one output port. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein said one or more controllable variable reactive elements comprise at least one of: one or more reactive elements controlled by one or more semiconductor devices, wherein the one or more semiconductor devices are controlled by the one or more mapped control signals generated by the circuit; one or more reactive elements controlled by one or more micro-electro-mechanical systems (MEMS) devices, wherein the one or more MEMS devices are controlled by the one or more mapped control signals; or one or more reactive elements each having a controllable reactance, wherein the reactance of each of the one or more reactive elements is controlled by one of the one or more mapped control signals. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the mapped control signals generated by the bias circuit enable or disable one or more switches that control a variable reactance of the RF matching network. ### Claim 6 (depends on 5) The apparatus of claim 5, wherein the one or more switches correspond to one or more semiconductor switches. ### Claim 7 (depends on 5) The apparatus of claim 5, wherein the one or more switches correspond to one or more mechanical switches. ### Claim 8 (depends on 7) The apparatus of claim 7, wherein the one or more mechanical switches correspond to one or more micro-electro-mechanical systems (MEMS) switches. ### Claim 9 (depends on 1) The apparatus of claim 1, wherein the RF matching network is coupled to a transceiver and an antenna of the communication device. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein the RF matching network is adapted to reduce signal reflections at one of the at least one RF input port or the at least one RF output port. ### Claim 11 (depends on 1) The apparatus of claim 1, wherein said bias circuit is adapted to generate at least one of analog or digital signals. ### Claim 12 A matching network, comprising one or more controllable variable reactive elements coupled to at least one input port and at least one output port, wherein said one or more controllable variable reactive elements are adapted to increase power transferred from said at least one input port to said at least one output port responsive to one or more control signals generated by a controller adapted to adjust one or more reactances within the matching network according to a mode of operation of a device detected by the controller. ### Claim 13 (depends on 12) The matching network of claim 12, wherein the device is a communication device, and wherein the controller determines the mode of operation from a mode of transmitting RF signals by the communication device. ### Claim 14 (depends on 12) The matching network of claim 12, wherein the device is a communication device, and wherein the controller determines the mode of operation from a mode of receiving RF signals by the communication device. ### Claim 15 (depends on 12) The matching network of claim 12, wherein the device is a communication device, and wherein the controller determines each of one or more frequencies of signals transferred from the at least one input port to the at least one output port. ### Claim 16 (depends on 12) The matching network of claim 12, wherein the controller is adapted to adjust the one or more reactances within the matching network in an open loop control system. ### Claim 17 (depends on 12) The matching network of claim 12, wherein said one or more controllable variable reactive elements comprise at least one of: one or more reactive elements controlled by one or more semiconductor devices, wherein the one or more semiconductor devices are controlled by the one or more control signals; one or more reactive elements controlled by one or more micro-electro-mechanical systems (MEMS) devices, wherein the one or more MEMS devices are controlled by the one or more control signals; or one or more reactive elements each having a controllable reactance, wherein the reactance of each of the one or more reactive elements is controlled by one of the one or more control signals. ### Claim 18 A machine-readable storage medium, comprising computer instructions to: determine a mode of communication operation of a communication device; generate one or more control signals according to the determined mode of operation; and supply said one or more control signals to a matching network to modify one or more reactances therein and thereby increase power transferred from at least one input port to at least one output port of said matching network. ### Claim 19 (depends on 18) The machine-readable storage medium of claim 18, comprising computer instructions to determine the mode of communication operation from a mode of transmitting RF signals by the communication device. ### Claim 20 (depends on 18) The machine-readable storage medium of claim 18, comprising computer instructions to determine the mode of operation from a mode of receiving RF signals by the communication device. ### Claim 21 (depends on 18) The machine-readable storage medium of claim 18, comprising computer instructions to determine a value for each of one or more frequencies of signals transferred from the at least one input port to the at least one output port. ### Claim 22 (depends on 18) The machine-readable storage medium of claim 18, wherein said one or more controllable variable reactive elements comprise at least one of: one or more reactive elements controlled by one or more semiconductor devices, wherein the one or more semiconductor devices are controlled by the one or more control signals; one or more reactive elements controlled by one or more micro-electro-mechanical systems (MEMS) devices, wherein the one or more MEMS devices are controlled by the one or more control signals; or one or more reactive elements each having a controllable reactance, wherein the reactance of each of the one or more reactive elements is controlled by one of the one or more control signals.