A TEM MODE RESONATOR

摘要

A TEM mode resonator comprising a tuneable cavity defined by an electrically conducting cavity wall, the cavity wall comprising a grounding face, a capacitor face and a surrounding wall extending therebetween; an electrically conducting resonator member within the cavity and extending from the grounding face part way to the capacitor face; a portion of the resonator member proximate to the capacitor face comprising a recess having an aperture therein; a tuning mechanism outside the tuneable cavity, the tuning mechanism comprising a tuning arm extending into the tuneable cavity through the aperture, the tuning mechanism being adapted to displace the tuning arm towards and away from the capacitor face, at least a portion of the tuning arm within the cavity being a tuning element, the tuning element being either a metal or a dielectric.