Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1989-09-05
1992-01-21
LaRoche, Eugene R.
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333202, 333209, H01P 120, H01P 1208
Patent
active
050831020
ABSTRACT:
A microwave band pass filter including dual-mode dielectric resonators mounted in a tubular enclosure to achieve coupling among the resonators without an iris. The filter is implemented in a canonical symmetric form, as longitudinal dual-mode realization or a canonical asymmetric form. The microwave band pass filter has input and output coaxial probes located along the enclosure with tuning and coupling screws provided to enable adjustment control of the frequency of resonance of the dielectric resonators and to control the coupling of energy from one resonant mode to an orthogonal mode in the same resonator. Lastly, the coupling of energy from one resonator to an adjacent resonator is accomplished by properly placed coupling screws.
REFERENCES:
patent: 4489293 (1984-12-01), Fiedziuszko
patent: 4571563 (1986-02-01), Cameron
patent: 4760361 (1988-07-01), Kobayashi
Zaki et al., "Coupling Between Hybrid Mode Dielectric Resonators," 1987 IEEE MTT-s Digest, pp. 617-620, Jun. 1987.
Zaki et al., "Coupling of Non-Axially Symmetric Hybrid Modes in Dielectric Resonators", IEEE Trans Microwave The & Tech. vol. MTT-35, No. 12, Dec. 1987, pp. 1136-1141.
Zaki et al., "Dual Mode . . . Without Iris", 1987 IEEE MTT-S Digest, pp. 141-144, Jun. 1987.
Zaki et al., "Canonical . . . Without Iris", IEEE Trans. on Microwave Theory and Tech., vol. MTT-35, No. 12, Dec. 1987, pp. 1130-1135.
Zaki et al., "A New Realization . . . Filters", The 17th European Microwave Conference, Rome, Italy, pp. 169-174, Sep. 1987.
Zaki et al., "Improved Selectivity . . . Filters", SBMO International Microwave Symposium Proceedings, Brazil, pp. 627-632, Jul. 1987.
Ham Seung
LaRoche Eugene R.
University of Maryland
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