H - Electricity – 03 – H
Patent
H - Electricity
03
H
H03H 11/36 (2006.01) H03H 7/46 (2006.01) H03J 7/02 (2006.01)
Patent
CA 2058146
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 the 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.
Marks & Clerk
Telefonaktiebolaget Lm Ericsson
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