Method and system for mitigating a voltage standing wave ratio

Details Method and system for mitigating a voltage standing wave ratio Method and system for mitigating a voltage standing wave ratio

2011-01-18

2011-01-18

Phu, Sanh D (Department: 2618)

Telecommunications

Transmitter

With feedback of modulated output signal

C455S127100, C455S103000, C455S430000, C455S522000, C455S151100

Reexamination Certificate

active

07873332

ABSTRACT:
Methods and systems for mitigating a voltage standing wave ratio in a transmitter are disclosed and may comprise calibrating an output power of a power amplifier integrated within a chip using a resistor that models an impedance of an antenna that is externally coupled to the amplifier while the antenna is decoupled. The gain and output power of the amplifier may be determined utilizing the known resistance and a voltage that is measured at an input of the power amplifier, or at a number of points prior to the power amplifier. When the antenna may be coupled to the transmitter, the transmitter output power may then be controlled utilizing the voltage measurements prior to the power amplifier to avoid measuring reflected waves in instances when the antenna impedance may vary. The power amplifier may be of a design that comprises reverse isolation to reduce reflected waves from the antenna.

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European Search Report for European Patent Application Serial No. 07013493.7-2215, dated Jul. 22, 2009.

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