Novel Compact High-Pass Filter with Sharp Attenuation Slope Using Cross-Coupling in the Multi-Layer Structure

摘要

A planar high-pass filter (HPF) by using cross-couplings in multi-layer structure is proposed in this paper. The HPF consists of paral lel plate and gap type capacitors and inductor lines on the bottom conductor. The one block of the HPF has a ladder T-section in the bridge T configu ration. The one block HPF is, thus, coarsely designed in the manner of the proto-type HPF and the performance is optimized by circuit simulator. With the gap capacitor adjusted the proposed HPF illustrates the steep slope characteristics near the cut-off frequency by the attenuation pole. In order to improve the stopband performance, the cascaded two block HPF is ex amined. Its measured results show the good agreement with the simulated ones giving the second attenuation pole by an inductive cross-coupling.