Mems-tuned high power, high efficiency, wide bandwidth power...

Wave transmission lines and networks – Coupling networks – With impedance matching

Reexamination Certificate

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C333S017300, C330S195000, C330S197000

Reexamination Certificate

active

06992543

ABSTRACT:
A circuit for matching the impedance of an output load to an active device includes a transformer including a first winding having a terminal for coupling to the output of the active device and a second winding electromagnetically coupled to the first winding, and a plurality of taps, each of the plurality of taps having a first end coupled to a position on the second winding corresponding to a ratio of the second winding to first winding differing from other ones of the plurality of taps, and a second end. The matching circuit further includes a plurality of MEMS switches each having a control input for receiving a corresponding control signal, a first terminal coupled to the second end of a corresponding one of the plurality of taps, and a switched output selectively coupled to a matching junction in response to the corresponding control signal.

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R. D. Streeter, C. A. Hall, R. Wood, R. Mahadevan, “VHF High Power Tunable RF Bandpass Filter using Microelectromechanical (MEM) Microrelays”,International Journal of RF and Microwave Computer-Aided Engineering, vol. 11/No. 5, Sep. 2001, pp. 261-275.
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