Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1994-10-12
1996-01-30
Pascal, Robert J.
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333202, 333207, H01P 120
Patent
active
054883350
ABSTRACT:
A filter duplexer, such as a filter duplexer for a radio transceiver, of minimum dimensions is disclosed. First and second filter portions of the duplexer each include a plurality of transmission lines. Cross sections of the plurality of transmission lines of each filter portion are of at least two different geometries. The amount of coupling between adjacent ones of the resonators, as well as the loading capacitances of such resonators, is controlled by the relative geometric configuration of the adjacent ones of the resonators. Because the amount of coupling between the resonators and the loading capacitances of the resonators is determinative of the filter characteristics of the filter duplexer, desired filter characteristics may be effectuated by careful selection of the geometric configurations of the resonators of each filter portion.
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Agahi-Kesheh Darioush
Kenoun Robert
Zakman Zdravko M.
Gambino Darius
Juffernbruch Daniel W.
Motorola Inc.
Pascal Robert J.
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