Compact Ultra-Wideband Bandpass Filters Using Microstrip-Coplanar-Waveguide Simplified Structure
A novel compact ultra-wideband bandpass filter (BPF) is proposed on the back-to-back composite microstrip-tocoplanar waveguide (CPW) structure. In this study, the CPW is composed by the defected ground structure (DGS). The microstrip–CPW transitions and the CPW shorted stubs are adopted as quasi-lumped-circuit elements for realizing a threepole high-pass filter prototype. By introducing a cross-coupled capacitance between input and output ports of this high-pass filter and suitably designing the transition stretch stubs, a compact three-pole ultra-wideband bandpass filter is implemented with two transmission zeros located close to the passband edges as well as good out-of-band response. Being developed from the quasi-lumped elements, and not from the transmission lines, the proposed ultra-wideband filters have sizes more compact. The proposed ultra-wideband filters have the merits of compact size, flat group delay, good insertion/return loss, and good selectivity. Simulated responses of these filters are demonstrated.
Bandpass filter coplanar waveguide(CPW) cross coupling high-pass filter microstip-cpw ultra-wideband(UWB)
Wang Haimeng Qin Weiping
Nanjing University of Posts & Telecommunications College of Communications and Information Engineeri College of Mathematics and Physics Nanjing University of Posts and Telecommunications Nanjing,China
国际会议
广州
英文
2008-11-19（万方平台首次上网日期，不代表论文的发表时间）