Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1990-09-21
1991-11-12
LaRoche, Eugene R.
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333202, 333134, 455 78, H01P 1205
Patent
active
050651200
ABSTRACT:
A frequency agile, dielectrically loaded bandpass filter is disclosed in which capacitive layers on the top surface of the filter are selectively switched to ground in order to affect a change in the center frequency of the passband response of the filiter. A PIN diode switching network, including a means for biasing the diode, is used to effectively place the capacitive layers in parallel with the quarter-wavelength transmission line resonators contained within the block of the filter.
REFERENCES:
patent: 4431977 (1984-02-01), Sokola et al.
patent: 4459571 (1984-07-01), Fraser
patent: 4462098 (1984-07-01), D'Avello et al.
patent: 4692724 (1987-09-01), Harris
patent: 4692726 (1987-09-01), Green et al.
patent: 4714906 (1987-12-01), D'Albaret et al.
patent: 4740765 (1988-04-01), Ishikawa et al.
patent: 4742562 (1988-05-01), Kommrusch
patent: 4800347 (1989-01-01), Yorita et al.
patent: 4800348 (1989-01-01), Rosar et al.
Microwave & RF Magazine, Oct. 1989, p. 150, Tunable Filter Varies Bandwidth, Center Frequency.
Electronics, Jul. 14, 1983, p. 129-131, by Tomoki Uwano, Ceramic-filled Resonator Cuts Costs of Radio-Telephone Filters.
RF Design Magazine, Mar. 1989, pp. 35-42, 129-131, by Darioush Agahi, Motorola, Inc., Monolithic Ceramic Block Combline Bandpass Filters.
Motorola, Inc., Technical Writing Services, No. 68P81049E82-D, Nov. 5, 1985, PHI, Trisolector Assembly and DYNA T-A-C Cellular Radiotelephone Transceiver Description.
Ham Seung
Krause Joseph P.
LaRoche Eugene R.
Motorola Inc.
Parmelee Steven G.
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