A novel E-plane substrate inserted bandpass filter with high selectivity and compact size

Abstract

In this article, a novel E-plane substrate inserted waveguide bandpass filter with high selectivity and compact size is proposed in Ka-band. By integrating an extra resonator between two metal septa, the E-plane waveguide filter is achieved with two transmission zeros at both sides of the passband which contribute to the high-skirt selectivity. One sample is fabricated, whose total length is just 5 mm, namely, less than 0.5 and the minimum insertion loss is only about 0.3 dB. Good agreements between simulated and measured results are obtained. © 2013 Wiley Periodicals, Inc. Int J RF and Microwave CAE 24:451–456, 2014.