Modes in a Mobius wire-loaded cavity resonator

Resonant modes of Mobius wire-loaded cavities are determined by a fully thr ee-dimensional numerical eigenfrequency analysis. Excellent agreement is ac hieved with experimental measurements of a loosely coupled Mobius wire in a copper cavity, for both the Mobius modes and the conventional generalized even modes. The field solutions provide insight applicable to suppression o f the higher order modes that limit the out-of-band performance of the band pass filters implemented with Mobius resonators. (C) 2001 John Wiley & Sons , Inc.