Patent ID: 6198363
Filing Date: 2001-03-06
Classification: H01P

Abstract:
A filter comprising:a shell construction of conductive material with at least one section;at least one resonator of conductive material in the at least one section for forming at least one resonance circuit, the resonator comprising at opposite ends a base and a second end, the base being fastened to the shell construction and the second end being directed elsewhere towards the shell construction at a distance therefrom, and means on the resonator having a surface directed towards the shell construction and increasing the cross-sectional area of the resonator to increase the capacitance between the resonator and the shell construction; anda frequency tuning element of conductive material for tuning the resonance frequency of the resonance circuit,wherein the frequency tuning element and the means form an integral whole, the frequency tuning element being a projection from the means,whereby the resonance frequency of the resonance circuit is tuned by adjusting a distance of the projection from the shell construction.