SYNTHESIS OF CHAINED-ELLIPTIC FUNCTION WAVEGUIDE BANDPASS FILTER WITH HIGH REJECTION

This thesis presents the synthesis of a bandpass filter to achieve high selectivity and
rejection properties using a new class of filter functions called chained-elliptic function
filters. Chained-elliptic filters have higher selectivity compared to Chebyshev function
filters and have the property of sensitivity to manufacturing tolerance reduction in
chained-function filters. The proposed design has high selectivity and reduced
sensitivity, enabling easier and faster filter fabrication, which greatly reduces the time
and cost required to manufacture a millimeter-wave filter. The characteristic
polynomials of chained-elliptic function filters are derived (through chaining elliptic
filtering function) and extracted to form the coupling matrix of the bandpass filter.