Method of tuning a ceramic duplex filter using an averaging step

Details Method of tuning a ceramic duplex filter using an averaging step Method of tuning a ceramic duplex filter using an averaging step

1994-04-29

1996-06-18

Lee, Benny

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333202, 333207, H01P 1213, H01P 1205

Patent

active

055282040

ABSTRACT:
A method of tuning a duplex filter (500). First, the center frequency of at least one filter of a duplex filter (10) is measured (502). Next, the difference between the measured center frequency and a desired center frequency is determined (504). And, third the duplex filter is tuned (506) by selectively removing a substantially planar layer of dielectric material for a top surface (14) of the filter (10), whereby the frequency characteristics are modified.

REFERENCES:
patent: 5004992 (1991-04-01), Grieco et al.
patent: 5208568 (1993-05-01), Sassin
patent: 5422610 (1995-06-01), Heine et al.

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