| 摘要 |
<p>A waveguide lowpass filter operates in at least two evanescent modes, The filter has successive ridges with a space between said ridges. The ridges are associated with parallel capacitance and a space between them is associated with series inductance in the TE10 mode. Each ridge is top-loaded so that series capacitance can occur in a TM11 mode in parallel to said series inductance. The filters of the present invention can be made smaller than previous evanescent lowpass filters and can achieve improved results.</p> |
