Compact SIW Based Band Pass Filter for sub 6 GHz Band Application

In recent years, with the increasing demand for wireless communication systems operating in the sub 6 GHz frequency band, there has been a growing need for compact and efficient band pass filters. Substrate Integrated Waveguide (SIW) is a promising technology that offers advantages such as miniaturization, low insertion loss, and high selectivity. In this paper, we propose a compact SIW-based band pass filter for sub 6 GHz band applications. The proposed filter is designed using a stepped impedance resonator (SIR) and a modified E shape coupling structure to achieve the desired band pass response. The filter is fabricated on a low-cost and commercially available substrate to make it suitable for mass production. Simulation and measurement results show that the proposed filter exhibits good performance in terms of insertion loss, return loss, and selectivity. The compact size and high performance make the proposed SIW-based band pass filter ideal for various wireless communication systems operating in the sub 6GHz frequency band. The optimization process is performed using Ansoft HFSS software, where the design parameters of the filter are adjusted to achieve the desired frequency response characteristics and is going to be proposed with the requirements of Frequency Coverage of (– 3 dB) i.e.., – 3300 to 3700 MHz, Insertion Loss less than 1 dB, Stop bandwidth – 32 dB and Lower and upper band relaxation of 30 MHz.