| 摘要 |
A multilayer dielectric evanescent mode waveguide bandpass filter (100) with resonators (10a, 11a) utilizing via hole technology capable of achieving very narrow bandwidths with minimal insertion loss and high selectivity at microwave frequencies is provided. The resonators (10a, 11a) may also be used as feed posts (1, 2). A typical implementation of this filter (100) is fabricated with soft substrate multilayer dielectrics with high dielectric constant ceramics. This filter (100) typically takes up less space than other filters presently available. A typical implementation operates at a center frequency of 1 GHz, although other center frequencies, such as approximately 0.5 GHz to approximately 60 GHz, are achievable. The perimeter of the filter (10 0) may be defined by via holes or plated slots.
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