A resonator assembly and filter

Abstract

Aspects and embodiments relate to a cavity resonator assembly and filters formed from such cavity resonator assemblies. One aspect provides a resonator assembly comprising: a first resonator cavity, a first resonant member, and a first signal feed; a second resonator cavity, a second resonant member, and a second signal feed. The first resonant member is located within the first resonator cavity, arranged to receive a signal from the first signal feed and configured to resonate within the first cavity at a first fundamental frequency. The second resonant member is located within the second resonator cavity, arranged to receive a signal from the second signal feed and configured to resonate within the second cavity at a second fundamental frequency. At least a portion of the second cavity is housed within the first resonant member, and the first resonator cavity surface from which the first resonant member extends is offset from a second resonator cavity surface from which the second resonant member extends. Aspects and embodiments may provide resonator assemblies which offer a reduction in size compared to a typical dual band resonant structure. That is to say, arrangements may be such that limited additional physical space is required for a dual resonant structure compared to a single resonant structure. Aspects and embodiments may provide for increased flexibility and scalability when building filters from resonant structures compared to conventional filtering solutions.

Dependencies are inferred from the claim text.