Microwave Band Pass Filter Design Realization in Micro strip Patch

Abstract

In this paper, a new band pass filter design and realization is proposed.  The topology used is ? -configuration of LC components and it is converted in to dielectric patch. FR4 dielectric material of dielectric constant 4.4 with thickness 1.6 mm and loss tangent value of 0.025 is selected to design the filter. IE3D EM simulator is used to realize the design in microstrip patch. The pass band of the filter ranges from 900 MHz to 2500 MHz. At the center frequency of 1500 MHz with 1600 MHz bandwidth is realized in microstrip patch. Third order butterworth band pass filter is arrived with -10 dB rejection at f_L and f_H. Insertion loss of <4 dB within f_L-f_H band and return loss better than -10 dB within the pass band is achieved. Good frequency response characteristics of the filter are arrived during the design and simulation. The proposed design is useful for wireless radio communication systems.