Electrically regulated filter having a selectable stop band

Details Electrically regulated filter having a selectable stop band Electrically regulated filter having a selectable stop band

1997-08-25

2000-03-14

Ham, Seungsook

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333207, 333235, H01P 1201

Patent

active

060378484

ABSTRACT:
A band-rejection filter (1) comprising transmission line resonators (2, 3) further comprises switching means (7, 8) to provide an electrical connection between each transmission line resonator and a certain fixed potential in response to a certain control signal. The fixed potential is advantageously the ground potential, whereby the control signal causes the resonators to be shunted and the frequency response of the filter to be changed into a low-pass-type frequency response.

REFERENCES:
patent: 5065120 (1991-11-01), Munn
patent: 5515017 (1996-05-01), Yamada et al.
patent: 5519364 (1996-05-01), Kato et al.
patent: 5541560 (1996-07-01), Turunen et al.

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