A uniform design of microstrip hairpin line filter at 7.2 GHz

Recently, the design and development of microwave filters have remarkably improved, in order to correspond to the requirements of technology. In this paper, we present the microstrip resonant coupling structures and the characteristics of them. Based on a mathematical algorithm, we designed a microstrip Chebyshev "Hairpin Line" filter at 7.2 GHz, 20 dB rejection at 6.7 GHz and 0.1 dB ripple in the passband and we discuss about the initial conditions and the acceptances of the problem as well as the simulation's results. Afterwards, a new uniform design of the filter is presented, making a comparison with the previous design. Two of the materials that can be used for the fabrication of these circuits, are suggested. Finally, after fabricating, we will examine the possibility of developing this structure, as extended work, using a combination of transmission lines and split ring resonators as a defected ground plane.