Title :
Ultra-wideband bandpass filter with hybrid microstrip/CPW structure
Author :
Wang, Hang ; Zhu, Lei ; Menzel, Wolfgang
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Abstract :
A novel ultra-wideband (UWB) bandpass filter (BPF) is presented using the hybrid microstrip and coplanar waveguide (CPW) structure. A CPW nonuniform resonator or multiple-mode resonator (MMR) is constructed to produce its first three resonant modes occurring around the lower end, center, and higher end of the UWB band. Then, a microstrip/CPW surface-to-surface coupled line is formed and modeled to allocate the enhanced coupling peak around the center of this UWB band, i.e., 6.85GHz. As such, a five-pole UWB BPF is built up and realized with the passband covering the entire UWB band (3.1-10.6GHz). A predicted frequency response is finally verified by the experiment. In addition, the designed UWB filter, with a single resonator, only occupies one full-wavelength in length or 16.9mm.
Keywords :
band-pass filters; coplanar waveguide components; microstrip filters; microstrip lines; microstrip resonators; microwave filters; resonator filters; ultra wideband technology; 16.9 mm; 3.1 to 10.6 GHz; CPW nonuniform resonator; coplanar waveguide structure; frequency response; hybrid microstrip-CPW structure; microstrip-CPW surface-to-surface coupled lines; multiple-mode resonator; passband filters; ultra-wideband bandpass filter; Band pass filters; Bandwidth; Coplanar waveguides; Insertion loss; Microstrip filters; Microstrip resonators; Passband; Resonance; Resonator filters; Ultra wideband technology; Hybrid microstrip/coplanar waveguide (CPW); multiple-mode resonator (MMR); surface-to-surface coupled line; ultra-wideband (UWB) bandpass filter (BPF);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2005.860016
