Title :
DGS resonator with two transmission zeros and its application to lowpass filter design
Author :
Chen, Qian ; Xu, Jie
Author_Institution :
Sch. of Phys. Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
fDate :
10/1/2010 12:00:00 AM
Abstract :
A novel defected ground structure (DGS) with two transmission zeros and a sharp cutoff frequency response is proposed. Both the two transmission zeros generated by the new DGS are lower than the one generated by a dumbbell-shaped DGS etched the same square area dimensions. On the basis of the proposed DGS, a lowpass filter has been designed, fabricated and measured. The filter with 3 dB cutoff frequency at 4 GHz exhibits a very sharp cutoff frequency response and an ultra wide stopband with rejection better than 25 dB from 4.2 to 23 GHz. Measured results show good agreement with simulated ones.
Keywords :
integrated circuit design; low-pass filters; resonator filters; DGS resonator; defected ground structure; frequency 4 GHz; lowpass filter design; sharp cutoff frequency response; two transmission zeros;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2010.2251
