Alcatel Lucent

Tsu-Wei Lin

Noriaki Kaneda

In one embodiment, a filter includes two sets of dielectric resonators mounted in corresponding sets of metallic resonant cavities. Adjoining resonant cavities are separated by a wall that have an opening. Each dielectric resonator of the first and second sets has a post and a single connected pedestal and is mounted within its corresponding cavity so that the post contacts a first cavity wall and the pedestal is separated from the opposing wall by an air gap. Each dielectric resonator of the first set is oriented in a first direction, with its pedestal on the bottom. Each dielectric resonator of the second set is oriented in a second direction, opposite to the first, with its pedestal on the top. The filter's (i) source port couples with a resonator of the first set and (ii) load port couples with a resonator of the second set.

Cavity resonator filters with pedestal-based dielectric resonators

In one embodiment, the cavity filter includes a housing defining a cavity, and at least one post projecting from a first interior surface of the housing towards a second interior surface of the housing. The first interior surface faces the second interior surface. The cavity filter further includes a thermo electric cooler disposed on the housing. The thermo electric cooler is configured to one of cool and heat at least a portion of the housing.

Cavity filter

A dielectric-loaded cavity resonator has a conductive (e.g., copper) box defining a cavity and a dielectric (e.g., ceramic) resonator mounted within the box. The dielectric resonator has a cylindrical dielectric post and first and second dielectric pedestals respectively connected to the ends of the post and having lateral dimensions greater than the diameter of the post. Insulating (e.g., PTFE) pads are mounted onto outer surfaces of the pedestals to provide air gaps between the pedestals and corresponding top and bottom walls of the box. In certain embodiments, the pedestals have rectilinear, 3D shapes completely or only partially covering the top and bottom walls of the cavity, while, in other embodiments, the pedestals have cylindrical shapes maximally or less than maximally covering the top and bottom walls of the cavity.

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Piscataway, NJ, United States of America

Tsu-Wei Lin