Radio station with optimized impedance

Details Radio station with optimized impedance Radio station with optimized impedance

2005-03-15

2005-03-15

Kincaid, Lester G. (Department: 2687)

Telecommunications

Transmitter

With variation of antenna impedance or dimension for modulation

C455S115200

Reexamination Certificate

active

06868260

ABSTRACT:
A radio station optimizes the impedance. An antenna of a transmitter of the radio station matches an output impedance of a power amplifier by adding an impedance with a variable reactance. A processor adjusts the variable reactance of the impedance according to an output signal of the power amplifier. The impedance with the variable reactance preferably includes either a plurality of inductors and capacitors, variable inductors and capacitors, or a plurality of microstrip lines. The processor calculates an optimum value for the variable reactance according to a measurement of the output signal of the power amplifier and stores those values for those measured values. In this way, a table is created, so that when the output signal is again measured the processor can use this table to determine which variable reactance will lead to impedance matching.

REFERENCES:
patent: 3662294 (1972-05-01), Jacobs et al.
patent: 5450088 (1995-09-01), Meier et al.
patent: 5491715 (1996-02-01), Flaxl
patent: 5722056 (1998-02-01), Horowitz et al.
patent: 5862458 (1999-01-01), Ishii
patent: 5991643 (1999-11-01), Chao-Cheng
patent: 6005891 (1999-12-01), Chadwick et al.
patent: 6018324 (2000-01-01), Kitchener
patent: 6625428 (2003-09-01), Finnell et al.
patent: 20010044283 (2001-11-01), Yajima

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