Fourth order antimetric elliptic band pass filter for C-band satellite multiplexer

Fourth order elliptic band pass filter function for C band Satellite communication in waveguide structure is implemented. MathCAD is used as a simulation tool to correlate the practical and experimental aspects. Wave guide implementation is used because they have high Q- factor and insertion loss in pass band and selectivity is inversely proportional to it. At higher frequency bands the parasitic, resistive and capacitive losses in all other implementation techniques would become enormous, hence waveguide implementation would become incumbent and is of dire importance. At high frequency bands frequency selectivity and band pass loss are important filtering properties and optimum filters are those exhibiting ripple in both pass band and stop band. The use of Synchronously tuned cavities in design increases stop band attenuation. Relative Steepness and roll -off factor also increases due to resonator cavities (whose equivalent circuit represents R-L-C networks) and therefore method of synchronizing these cavities using quarter wavelength permits proper matching and iris dimensions become non-critical. The designed filter possesses flat in-band gain and smaller group delay variation to minimize cross talk and distortion.