A New Design of Very Compact UWB Band-Stop Filter Using Coupled W-Shaped Strips

摘要

In this paper, a compact microstrip band-stop filter (BSF) with 3-18 GHz bandwidth for radar applications is proposed. The microstrip filter configuration consists of a transmission line with a pair of coupled W-shaped strips as a stub, and a ground plane. Operation frequencies of the filter can be easily controlled by changing the size of W-shaped strips. The proposed band-stop filter has a very wide bandwidth from 3 to 18 GHz that can be used in C-band (4-8 GHz), X-band (8-12 GHz) and Ku-band (12-18 GHz) applications. An excellent agreement between measured and simulated was obtained. The proposed microstrip filter fabricated on a Rogers RT/Duroid 5880 substrate with a relative dielectric constant of 2.2 and has a very small size of 10x15 mm(2). The proposed antenna configuration is simple, easy to fabricate and can be integrated into any radar system.