A Compact Microstrip T-Shaped Resonator Band Pass Filter for 5G Applications

In this paper, we introduce a compact wideband microstrip band pass filter for 3.5GHz, with excellent performance for the next generation mobile standards “5G”. The frequency band also includes the frequencies of the WIMAX (Worldwide Interoperability for Microwave Access) and WLAN (wireless local area network) applications. The proposed band pass filter is based on a rectangular T-Shaped resonator. Their dimensions are equal to 9×5mm2. The proposed compact microstrip band pass filter has been designed by software CST Microwave Studio using FR4 substrate having relative permittivity (εr) of 4.3. This filter has a center frequency of 4,75GHz and 3dB bandwidth from 3 to 6GHz, an insertion loss low than 1dB, a return loss better than 30dB and also a fractional bandwidth more than 70%. This results are in good agreement with those accomplished by Advanced Design System “ADS”.