A novel ultra-wideband bandpass filter (BPF) is presented using a back-to-back microstrip-to-coplanar waveguide (CPW) transition employed as the broadband balun structure in this letter. The proposed BPF is based on the electromagnetic coupling between open-circuited microstrip line and short-circuited CPW. The equivalent circuit of half of the filter is used to calculate the input impedance. The broadband microstip-to-CPW transition is designed at the center frequency of 6.85 GHz. The simulated and measured results are shown in this letter.
- Bandpass filter (BPF)
- Broadband balun
- Microstrip-to-coplanar waveguide (CPW)
- Ultra-wideband (UWB)
ASJC Scopus subject areas
- Electrical and Electronic Engineering