Super‐wideband cascaded bandpass filter using suspended substrate stripline technology

Abstract

AbstractThis paper presents a wideband cascaded bandpass filter with a fractional bandwidth of 160% centered at 10 GHz using suspended substrate stripline technology. The highpass and lowpass filters are both 11th‐order generalized Chebyshev designs with a cutoff frequency of 2 and 18 GHz, respectively, and cascaded to form a continuous 2‐18 GHz bandpass filter. Simulated and measured results of all of the filters show good agreement, and measured results of the cascaded bandpass filter shows less than 2 dB of insertion loss and greater than 10 dB of return loss over the entire passband.