Method for fine tuning the resonant frequency of a filter in a c

Details Method for fine tuning the resonant frequency of a filter in a c Method for fine tuning the resonant frequency of a filter in a c

1994-02-04

1995-12-05

Lee, Benny

Wave transmission lines and networks

Automatically controlled systems

333174, 455125, H03H 1104, H03H 1134, H04J 108

Patent

active

054732921

ABSTRACT:
The invention relates to a method for fine tuning the resonant frequency of a filter in a combiner, which is provided for combining signals from several radio channels, to the carrier frequency of an input signal to the filter. The power of the output signal from the filter is measured in a narrow frequency band around the carrier frequency of said input signal. Furthermore, the power of the signal reflected by the filter is measured in a narrow frequency band around the carrier frequency of the input signal. Thereafter a measure of the ratio between the two power measurements is formed. The resonant frequency of the filter is adjusted so as to maximize this measure.

REFERENCES:
patent: 3355667 (1967-11-01), Bruene
patent: 3715690 (1973-02-01), Young et al.
patent: 3778731 (1973-12-01), Oomen
patent: 3891926 (1975-06-01), Ishman et al.
patent: 4726071 (1988-02-01), Jachowski

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