Mobius resonator and filter

摘要

An electromagnetic resonator and a frequency filter. The resonator is composed of an electromagnetic waveguiding structure which is twisted along its axis while being bent back and the two ends connected smoothly to provide a smooth path to the electromagnetic wave, the twist providing additional phase shift to facilitate a resonant condition in a smaller volume. The filter includes one or more coupled resonators which are coupled in a controlled fashion to an external circuit to realize a desired frequency selectivity.