Method and apparatus for adaptive impedance matching
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H03H-007/38
H03H-011/30
G01R-027/00
출원번호
US-0030439
(2013-09-18)
등록번호
US-9130543
(2015-09-08)
발명자
/ 주소
McKinzie, William E.
출원인 / 주소
BLACKBERRY LIMITED
대리인 / 주소
Guntin & Gust, PLC
인용정보
피인용 횟수 :
2인용 특허 :
238
초록▼
A system that incorporates teachings of the present disclosure may include, for example, an adaptive impedance matching network having 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. The
A system that incorporates teachings of the present disclosure may include, for example, an adaptive impedance matching network having 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. The RF matching network can be adapted to reduce a level of reflected power transferred from said at least one input port by varying signals applied to said controllable variable reactive elements. The one or more controllable variable reactive elements can be coupled to a circuit adapted to map one or more control signals that are output from a controller to a signal range that is compatible with said one or more controllable variable reactive elements. Additional embodiments are disclosed.
대표청구항▼
1. A communication device, comprising: a transceiver;an antenna; andan RF matching network comprising a plurality of variable reactive elements, wherein the RF matching network has an RF input port coupled to the transceiver producing an RF signal supplied to the RF input port, and wherein the RF ma
1. A communication device, comprising: a transceiver;an antenna; andan RF matching network comprising a plurality of variable reactive elements, wherein the RF matching network has an RF input port coupled to the transceiver producing an RF signal supplied to the RF input port, and wherein the RF matching network comprises an RF output port coupled to the antenna;a detector that obtains a signal from the RF output port of the RF matching network and determines a signal parameter associated with the signal; anda controller coupled with the detector and with the RF matching network, wherein the controller generates a plurality of control signals for independently controlling the plurality of variable reactive elements based on the signal parameter,wherein the plurality of control signals is generated by the controller based on a mode of operation of the communication device,wherein the mode of operation distinguishes between a transmit mode and a receive mode, andwherein the RF matching network modifies signal power transferred from the RF input port to the RF output port according to the plurality of control signals applied to the plurality of variable reactive elements to vary a variable impedance of the RF matching network. 2. The communication device of claim 1, wherein the plurality of variable reactive elements includes a voltage tunable dielectric capacitor. 3. The communication device of claim 1, wherein the determining of the signal parameter associated with the signal does not utilize a directional coupler. 4. The communication device of claim 3, wherein the determining of the signal parameter is performed without determining phase information associated with the signal. 5. The communication device of claim 1, wherein the plurality of variable reactive elements includes a reactive element configurable with a semiconductor device. 6. The communication device of claim 1, wherein the plurality of variable reactive elements includes a reactive element controlled with a micro-electro-mechanical systems (MEMS) device. 7. The communication device of claim 1, wherein the plurality of variable reactive elements includes a reactive element configurable with a mechanical switch. 8. The communication device of claim 1, wherein the plurality of control signals includes digital signals. 9. The communication device of claim 1, further comprising a charge pump that increases a voltage supply to each of the plurality of variable reactive elements, wherein the voltage supply is based on the plurality of control signals from the controller. 10. The communication device of claim 9, wherein the controller generates the plurality of control signals based on an operating frequency of the communication device. 11. The communication device of claim 9, wherein the voltage supply includes a negative voltage. 12. A communication device, comprising: a transceiver;an antenna; andan RF matching network comprising a plurality of variable reactive elements, wherein the RF matching network has an RF input port coupled to the transceiver producing an RF signal supplied to the RF input port, and wherein the RF matching network comprises an RF output port coupled to the antenna;a detector that obtains a signal from the RF output port of the RF matching network and determines a voltage magnitude associated with the signal; anda controller coupled with the detector and with the RF matching network, wherein the controller generates a plurality of control signals for independently controlling the plurality of variable reactive elements based on the voltage magnitude and based on a mode of operation of the communication device that distinguishes between a transmit mode and a receive mode,wherein the RF matching network modifies signal power transferred from the RF input port to the RF output port according to the plurality of control signals applied to the plurality of variable reactive elements to vary a variable impedance of the RF matching network. 13. The communication device of claim 12, wherein the determining of the voltage magnitude associated with the signal does not utilize a directional coupler. 14. The communication device of claim 12, wherein the plurality of variable reactive elements includes a voltage tunable dielectric capacitor. 15. The communication device of claim 12, wherein the plurality of variable reactive elements includes a reactive element configurable with a semiconductor device. 16. The communication device of claim 12, wherein the plurality of variable reactive elements includes a reactive element controlled with a micro-electro-mechanical systems (MEMS) device. 17. The communication device of claim 12, wherein the plurality of variable reactive elements includes a reactive element configurable with a mechanical switch. 18. A communication device, comprising: a transceiver;an antenna; andan RF matching network comprising a plurality of voltage tunable dielectric capacitors, wherein the RF matching network has an RF input port coupled to the transceiver producing an RF signal supplied to the RF input port, and wherein the RF matching network comprises an RF output port coupled to the antenna;a detector that obtains a signal from the RF output port of the RF matching network and determines a signal parameter associated with the signal; anda controller coupled with the detector and with the RF matching network, wherein the controller generates a plurality of control signals for independently controlling the plurality of voltage tunable dielectric capacitors based on the signal parameter and based on an operating frequency of the communication device,wherein the plurality of control signals is generated by the controller based on a mode of operation of the communication device,wherein the mode of operation distinguishes between a transmit mode and a receive mode,wherein the RF matching network modifies signal power transferred from the RF input port to the RF output port according to the plurality of control signals applied to the plurality of voltage tunable dielectric capacitors to vary a variable impedance of the RF matching network. 19. The communication device of claim 18, wherein the determining of the signal parameter associated with the signal does not utilize a directional coupler. 20. The communication device of claim 19, wherein the determining of the signal parameter is performed without determining phase information associated with the signal.
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