Input coupling adjustment arrangement for radio frequency filter

Details Input coupling adjustment arrangement for radio frequency filter Input coupling adjustment arrangement for radio frequency filter

1997-06-30

2000-02-15

Ham, Seungsook

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333206, 333134, H01P 1202, H01P 512

Patent

active

060257644

ABSTRACT:
An arrangement for adjustably coupling a radio frequency input port to a resonator element of the filter. The arrangement comprises a resilient conductor (19) which extends from the input port (15) into the electric field of a resonator element (2). The remote end of the resilient conductor resiliently abuts the point (20) of an adjustment screw (20a). Operating the screw moves the resilient conductor in relation to the electric field and alters the capacitive coupling between the input port and the resonator element for fine tuning the impedance match of the input to the filter.

REFERENCES:
patent: 4821006 (1989-04-01), Ishikawa et al.
patent: 5389903 (1995-02-01), Piirainen
patent: 5731269 (1998-03-01), Clermont
patent: 5764115 (1998-06-01), Hattori et al.

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