Ceramic Bandpass Filters — Boon or Bane?

摘要

In recent years, the electronics industry has seen important technological advances superimposed upon an emerging commercial market place. The ceramic bandpass filter has become a reality and has found its niche in wireless communications equipment. This new version of coaxial bandpass filters has become feasible due to the miracle of new ceramic materials. They provide high dielectric constants, low loss tangents and markedly improved temperature stability. The ceramic bandpass filter has achieved dramatic unit cost reduction via a new and novel manufacturing process. In this tutorial article, some of the basic capabilities and limitations of ceramic bandpass filters will be discussed.