COMPACT ULTRA-WIDEBAND BANDPASS FILTER WITH DEFECTED GROUND STRUCTURE

A compact planar microstrip ultra-wideband (UWB) bandpass filter is presented in this paper. The proposed UWB filter is realized by cascading a high pass filter (HPF) and a lowpass filter (LPF). HPF with short-circuited stubs is used to realize the lower stopband and a lowpass filter based on a defected ground array in the ground plane employed to attenuate the upper stopband. One such a bandpass filter is designed and simulated.

[1]  R. Zhang,et al.  A novel lowpass microstrip filter using metal-loaded slots in the ground plane , 2004, 2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535).

[2]  W. Menzel,et al.  Ultra-wideband bandpass filter with hybrid microstrip/CPW structure , 2005, IEEE Microwave and Wireless Components Letters.

[3]  H. Harada,et al.  Development of band pass filter for ultra wideband (UWB) communication systems , 2003, IEEE Conference on Ultra Wideband Systems and Technologies, 2003.

[4]  Jia-Sheng Hong,et al.  Microstrip filters for RF/microwave applications , 2001 .

[5]  Keyvan Forooraghi,et al.  Guided and Leaky Wave Characteristics of Periodic Defected Ground Structures , 2007 .

[6]  Yong-Chang Jiao,et al.  LOWPASS FILTER DESIGN OF HILBERT CURVE RING DEFECTED GROUND STRUCTURE , 2007 .

[7]  Ronghong Jin,et al.  Ultra-wideband bandpass filter with hybrid quasi-lumped elements and defected ground structure , 2007 .

[8]  H. Ishida,et al.  Design and analysis of UWB band pass filter with ring filter , 2004, 2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535).

[9]  D. Pozar.  Microwave Engineering , 1990 .