Design and Analysis of High Performance and Miniaturized Bandpass filter using Meander Line and, Minkowski Fractal Geometry

The band pass filter (BPF) is an important component that used in transmitter and receiver of a microwave communication system. The aim of this study is to design miniaturized BPF by fractal geometry techniques using microstrip structure. Meander line technique compound with Minkowski fractals was used for extra size reduction. The proposed BPF designed at center frequency 2.4 GHz which is used in industrial scientific medical (ISM) band applications with bandwidth 429 MHz (FBW=17.6%). The proposed filtering structure was designed using FR-4 substrate with 4.3 dielectric constant and 1.6mm thickness. The proposed filter demonstrates 1.6 dB insertion loss, 17 dB return loss, and size reduction about 74.5% as compared with conventional design. The overall dimensions of designed filter (14.18mm x 13.01mm) which equal to (0.2λgx0.18λg). CST microwave studio tools used in the design and simulation of the proposed BPFs.