Biconical multimode resonator

Details Biconical multimode resonator Biconical multimode resonator

1995-03-15

1997-03-25

Lee, Benny

Wave transmission lines and networks

Resonators

Cavity resonator

333230, H01P 706

Patent

active

056148771

ABSTRACT:
A bandpass microwave filter (32) is constructed by use of a right cylindrical cavity resonator (10) wherein end regions (22, 24) of the resonator are tapered. The tapering is accomplished by replacing end portions of a right cylindrical sidewall with frusto-conic sections (22, 24) of side wall. Each frusto-conic section joins a central cylindrical section (26) of the sidewall with a planar end wall (14, 16). Each of the end walls is provided with a coupling slot (28, 30) having dimensions substantially smaller than a half wavelength of the center resonant frequency of the resonator so as to be a nonresonant slot. The slots in the end walls may be coupled to rectangular waveguides (34, 36) which form input and output ports by which electromagnetic signals are applied to and extracted from the resonator.

REFERENCES:
patent: 3110000 (1963-11-01), Churchill
patent: 3697898 (1972-10-01), Blachier et al.
patent: 5012211 (1991-04-01), Young et al.
patent: 5179363 (1993-01-01), Schwartz et al.
H. L. Thal Jr., "Cylindrical TE011/TM111 Mode Control by Cavity Shaping", IEEE Transactions On Microwave Theory and Techniques, vol. 27, No. 12, Dec. 1979, New York, pp. 982-986.
W. C. Tang et al., "A True Elliptic-Function Filter Using Triple-Mode Degenerate Cavities", IEEE Transactons On Microwave Theory And Techniques, vol. 32, No. 11, Nov. 1984, New York, pp. 1449-1454.
Volgelman, "High-power Microwave Rejection Filters Using Higher-Order Modes", IRE Trans. on a Microwave Theory & Techniques, Oct., 1959, pp. 461-465.

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