Short-circuited series stubs for application in uniplanar low-pass filters

摘要: An alternative uniplanar low-pass filter with series stubs is presented in this paper and its upper stopband extended up to five times of cutoff frequency. The basic structure primarily consists short-circuited on slot line connecting lines coplanar waveguide. Under the target Chebyshev function frequency responses, all element values involved topology determined via efficient synthesis design approach rather try-to-cut optimization approach. Later on, between adjacent replaced by equivalent T-shaped transmission suppress higher order harmonic bands. As examples, two five-pole filters without harmonic-suppressed elements embedded are designed, fabricated measured.