A Compact Wide Stop-band Koch-shaped Electromagnetic Bandgap Microstrip Low Pass Filter

摘要

A novel compact wide stop-band electromagnetic bandgap microstrip low pass filter using a Koch shape is presented. The Koch-shaped configuration of the low pass filter not only can reduce the size of the structure, but can also widen the stop-band width. In this article, a pass-band with a less than -25 dB return loss and a stop-band width of 8.6 GHz were achieved by the presented Koch-shaped dual-planar electromagnetic bandgap microstrip low pass filter. The occupied area of the filter is only 25 × 20 mm~2.