Published Paper Details:

Filter is one of the key component of microwave communication system. Filter ensures the propagation of signal in required frequency band and attenuates the signals out of the band range. Microwave filters can be realized by using coaxial, waveguide, stripline and microstrip structure. Microstrip filter is preferable due to of its compact size and low weight. Stub line, end edge, parallel coupled, interdigit, combline type of microstrip filters are in use for the time. Parallel coupled microstrip filter has advantageous in to the terms of simple design structure techniques, easy to fabricate and integrate with other RF component/ devices. Design and simulation of parallel coupled microstrip band pass filter is presented in this paper. The proposed filter is designed for 2.45GHz using HFSS ANSYS simulation software. Roger3003 dielectric substrate of height 1.5mm is used as substrate. Defected ground structure approach incorporated to enhance bandwidth. 28.57% fractional bandwidth (2.0720-2.7720GHz) is achieved with 0.2dB insertion loss in pass band and 30 dB attenuation at 2.2 GHz. Return loss is greater than -27dB in pass band of having maximum return loss of -43.12 dB at 2.6290 GHz. Simulation results exhibit good performance of proposed filter. This filter can be used for ISM band application (2.4-2.5GHz) and 2.6GHz band (2.5-2.69GHz) for terrestrial mobile communication system.