Stub type bandpass filter

Details Stub type bandpass filter Stub type bandpass filter

1983-01-10

1984-12-18

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333204, 333246, H01P 1203, H01P 1201

Patent

active

044892926

ABSTRACT:
A bandpass filter has a line extending from an input terminal to an output terminal. Three stubs are connected to the line at three different locations on the line at a spacing which is 1/8 of the wavelength, at the center frequency of the passband. Each of the three stubs is short-circuited at a first end and open at a second end and has a total length which is 1/4 the wavelength of said center frequency. The outermost of the three stubs is connected to the transmission line, at a position which is 1/6 the wavelength, from the first end. The intermediate of the three stubs is connected to the line at a position which is either 1/8 or 1/4 the wavelength of the center frequency.

REFERENCES:
patent: 2964718 (1960-12-01), Packard
patent: 3345589 (1967-10-01), Di Piazza

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