Design and development of a compact and low cost folded-hairpin line bandpass filter for L-band Communication

A five-pole bandpass filter is designed using compact filter occupies a very small area. The full-wave simulator IE3D is being used to design the resonator and to calculate the coupling coefficients. Measured results are to be compared with the computed responses. The folded hairpin line resonator filters are simple to design and built. This paper presents a new class of folded hairpin line microstrip resonator filters wih 60% or more reduction in size compared to the conventional hairpin line resonators. The proposed five-pole folded hairpin line microstrip filter is a compact structured, narrow band, high selectivity, small sized and low cost band pass filter for trans/receive communication systems in L-band.