Bandpass filters

Details Bandpass filters Bandpass filters

1982-12-20

1985-04-23

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333202, 333222, H01P 1203

Patent

active

045132631

ABSTRACT:
The specification describes four classes of microwave bandpass filter formed in triple plate stripline with portions of line having a commensurate length equal to a quarter-wavelength at the center of the stopband, enabling the widths of the pass and stop bands to be specified independently; lumped capacitors (C.sub.s) are also used to assist in providing elements with high series capacitance. The four classes together cover a wide range of electrical specifications, and enable wide pass and stop bands and high selectively to be obtained. Each class corresponds to a bandpass S-plane prototype network configuration (FIGS. 2, 5, 6 and 7 respectively) derived using exact synthesis procedures from a specification of transmission zero locations. The filters can be manufactured using photolithographic technology to have consistently accurate performance.

REFERENCES:
patent: 2532993 (1950-12-01), Carter
patent: 2915716 (1959-12-01), Hattersley
patent: 2984802 (1961-05-01), Dyer et al.
patent: 3879690 (1975-04-01), Golant et al.

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