Modes in a Möbius wire‐loaded cavity resonator*

Resonant modes of Möbius wire‐loaded cavities are determined by a fully three‐dimensional numerical eigenfrequency analysis. Excellent agreement is achieved with experimental measurements of a loosely coupled Möbius wire in a copper cavity, for both the Möbius modes and the conventional generalized even modes. The field solutions provide insight applicable to suppression of the higher order modes that limit the out‐of‐band performance of the bandpass filters implemented with Möbius resonators.