Date of Publication :28th February 2023

Abstract: This paper presents the design and simulation of a Microstrip hairpin Bandpass filter using a square shape slot defected ground structure. First, we designed a Hairpin Band pass filter to operate at the center frequency of 2.22 GHz with a fractional bandwidth of 0.2 on substrate FR-4 high permittivity material with substrate height is 1.6mm and Return loss(s11) -27.33dB is obtained and second hairpin Band pass filter is designed using square shape defected ground structure and -38.08 dB Return loss (s11) is Obtained It is observed that the return loss of the filter is improved in second filter design. Return loss indicates the performance of the filter. The simulation is carried out in high-frequency structural software (HFSS).

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