Adaptive impedance matching (AIM) for electrically small...

Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency

Reexamination Certificate

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C455S083000, C455S078000, C455S107000

Reexamination Certificate

active

08068800

ABSTRACT:
A method of tuning an antenna circuit includes: (a) receiving a signal on an antenna, (b) producing a received signal strength indication based on the received signal, (c) using the received signal strength indication to produce a control voltage, (d) using the control voltage to control a capacitance in an antenna matching circuit, (e) changing the control voltage to minimize a ratio of a change in the received signal strength indication to a change in the control voltage and (f) repeating steps (a), (b), (c), (d) and (e). An apparatus that implements the method is also provided.

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U.S. Appl. No. 11/861,479, filed Sep. 26, 2007, Peyla et al.

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