Strip-line resonator and a band pass filter having the same

Details Strip-line resonator and a band pass filter having the same Strip-line resonator and a band pass filter having the same

1980-10-29

1983-02-01

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333219, H01P 1203, H01P 1212, H01P 708

Patent

active

043718531

ABSTRACT:
The width of a strip-line conductor in a TEM mode resonator is made wider at the center portion thereof, at which current is maximum, then the open-ended widths at both end portions of the conductor so that impedance of the center portion is lower than the impedances of both end portions. The impedance may be stepwisely or continuously varied, and spurious resonance frequencies may be determined by the impedance ratio between the higher and lower impedances. Such a resonator may be included in a band pass filter in such a manner that the band pass filter comprises at least one resonator whose spurious resonance frequencies differ from those of remaining resonators.

REFERENCES:
patent: 2411555 (1946-11-01), Rogers
patent: 4233579 (1980-11-01), Carlson et al.
patent: 4313097 (1982-01-01), De Ronde

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