Narrow-band, bandstop filter

Details Narrow-band, bandstop filter Narrow-band, bandstop filter

1990-03-02

1991-11-12

Laroche, Eugene R.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

3332191, 333235, 333 35, H01P 120

Patent

active

050651196

ABSTRACT:
A multi-resonant notch filter incorporates a stepped impedance transmission line with impedance values going from a relatively low value and increasing upward to a relatively high value then back down to a relatively low value again. A plurality of resonant cavitites is coupled to the relatively high central impedance line section of the filter. Other resonators can be coupled to lower impedance sections of the transmission line.

REFERENCES:
patent: 3840828 (1974-10-01), Linn et al.
patent: 4468644 (1984-08-01), Teague et al.
patent: 4823098 (1989-04-01), DeMuro et al.
patent: 4862122 (1989-08-01), Blair, Jr. et al.
Schiffman et al., "Design Tables . . . Band-Stop Filter", IEEE Trans. on Microwave Theory & Tech., vol. MTT-14, No. 10, Oct. 1966, pp. 474-482.
"Waveguide Bandstop Elliptic Function Filters", by J. David Rhodes in the IEEE Transactions on Microwave Theory & Tech., Nov., 1972.
"Realization of Dual Mode Band Rejection Filters", by R. Snyder published in the 1979 Procedings of IEEE Microwave Theo. & Tech. pp. 264-268.
"Propagation Characteristics of a Partially Filled Cylindrical Waveguide for Light Beam Modulation" by D. Chen in the IEEE Trans. on Microwave the vol. MTT-14, No. 10, Oct. 1966, pp. 482, 483.

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