Dielectric core tunable filters

摘要

A dielectric core tunable filter for microwave frequencies of 0.5-30 GHz. The filter includes a low loss machined dielectric having multiple channels a portion of which are terminated in micro-electromechanical variable capacitors to realize coupled resonators. The machined dielectric is metalized with a material, such as copper, silver, or gold, and then patterned to provide ring shaped recesses at the ends of preselected channels.

主权项

1. A filter for filtering microwave frequencies comprising:
a filter body having:
an outer surface;a plurality of channels disposed within the filter body, each of the plurality of channels extending with a constant diameter through the filter body and having a first end, a second end, and a channel surface disposed therebetween;a recess formed surrounding a channel of the plurality of channels and extending into the filter body thereby creating a tube located within the recess, the recess disposed at the first end of the channel of the plurality of channels; and a micro-electromechanical (MEM) capacitor disposed on the filter body outer surface at the recess, wherein the filter body outer surface and the channel surface have a metalized surface.