Tunable helical resonator

Details Tunable helical resonator Tunable helical resonator

H - Electricity

01

P

333/92

H01P 7/06 (2006.01) H01P 7/00 (2006.01) H03H 5/02 (2006.01)

Patent

CA 1183227

Abstract A helical cavity resonator having a grounded shield, a hollow coil form and associated quarter wavelength wire coil. A non-ferrous conductive slug can be adjusted to variable positions inside the hollow coil form. Placement of the slug in a region proximate to the inside of the wire coil tunes the cavity resonator in a predominately inductive manner. Changing the slug position in the bore so that it is proximate to the shield top and removed from the inside of the wire coil tunes the cavity resonator in a predominately capacitive manner. By utilizing both inductive and capacitive tuning a helical cavity resonator with a wide tuning range is realized while maintaining a simple, inexpensive construction.

407988

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