Cavity resonator filter structure having improved cavity arrange

Details Cavity resonator filter structure having improved cavity arrange Cavity resonator filter structure having improved cavity arrange

1997-03-20

1999-04-13

Ham, Seungsook

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333202, 455562, H01P 512, H01P 120

Patent

active

058942505

ABSTRACT:
A combined resonator-cavity filter includes a number of cavity structures designed for cooperative arrangement within a housing. The resonator cavities are constructed and arranged to pass energy in an assigned frequency band. The cavities include a first cavity structure having a corresponding cavity volume and constructed to provide a first Q, and a second cavity structure having its corresponding cavity volume and constructed to provide a second Q. The cavity volume corresponding to the second cavity structure is less than the cavity volume corresponding to the first cavity structure. Other aspects are directed to the arrangement and uses of sets of such cavity structures as part of a combined duplexer-receiver having the same housing.

REFERENCES:
patent: 4291288 (1981-09-01), Young et al.
patent: 4360793 (1982-11-01), Rhodes et al.
patent: 4675630 (1987-06-01), Tang et al.
patent: 4677402 (1987-06-01), Cesani et al.
patent: 4780694 (1988-10-01), Kich et al.
patent: 4881051 (1989-11-01), Tang et al.
patent: 5530921 (1996-06-01), Dulong et al.
patent: 5554960 (1996-09-01), Ohnuki et al.
Mumford, W., "Maximally-flat Filters in Waveguide", Bell Telephone System Technical Publications--Monograph B--1602 pp. 1-30 (1948).
Pfitzenmaier, G., "Synthesis and Realization of Narrow-Band Canonical Microwave Bandpass Filters Exhibiting Linear Phase and Transmission Zeros", IEEE Transactions on Microwave and Theory Techniques, 30(9):1300-1311 (Sep. 1982).
Uwano, T., "Ceramic-filled Resonator Cuts Costs of Radio-Telephone Filters", Electronics International, 56(14):129-131 (Jul. 1983).
Liang, Ji-Fuh et al., "Mixed Modes Dielectric Resonator Filters", IEEE Transactions on Microwave Theory and Techniques, vol. 42, No. 12, pp. 2449-2454, Dec., 1994.
Wang, Chi et al., "Mixed Modes Cylindrical Planar Dielectric Resonator Filters with Rectangular Enclosure", IEEE Transactions on Microwave Theory and Techniques, vol. 43, No. 12, pp. 2817-2823, Dec., 1995.
Solitra Oy Brochure, "Short Company Info", Kempele, Finland prior to Mar. 1997.
Solitra Product Brochure, "Duplexfilter for the 450MHZ Handportable / NXS4401", May 8, 1995.
Solitra Oy Product Brochure "Duplexer for the 450 MHZ Handportable / NSX4501", May 8, 1995.
Solitra Oy Product Brochure "EGSM Duplex Filter / GXS9504", May 8, 1995.
Solitra Product Brochure "Low-Pass Filter / PXP8101", Sep. 20, 1995.
Solitra Product Brochure "Microcell Filter, PCS 1900 Series I / PXU9201", Sep. 20, 1995.

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