Study the Comparison between Un-Bended and Bended Broadband Parallel Coupled Microstrip Bandpass Filters Under Certain Angle

Abstract

In this paper, design and simulation of broadband parallel-coupled microstrip bandpass filters used for modern wireless communication technology (Military & Industrial System such as Low Noise Block ( ) in Television Satellite) are presented, Four designs of filters at 10GHz center frequency are proposed. The first design is parallel coupled microstrip filter, which modify by bending some of microstrip conductors in specific angle( ) as shown in the second design to modify the characteristics and results. In this paper, design and simulation of broadband parallel-coupled microstrip bandpass filters used for modern wireless communication technology (Military and Industrial System such as Low Noise Block ( ) in Television Satellite) are presented, Four designs of filters at 10GHz center frequency are proposed. The first design is parallel coupled microstrip filter, which modify by bending some of microstrip conductors in specific angle as shown in the second design to modify the characteristics and results. The third design is U-shape parallel coupled filter which modify by bending its stripes with the same angle as above as shown in the fourth design to obtain the best characteristics and results. All filters are simulated by using CAD (Microwave office 2000 version 3.22) and implemented on the Roger RT-duroid 6006, PTFE ceramic substrate with Dielectric constant, loss tangent and substrate height.