Title :
Stepped-Impedance Defected Ground Structure
Author :
Karmakar, Nemai C. ; Li Ling, Rita Lim
Author_Institution :
Dept. of Electr. & Comput. Syst. Eng., Monash Univ., Clayton, VIC
Abstract :
The negative image of a microstrip stepped-impedance lowpass filter (LPF) or hi-Z, low-Z filter is used on the ground plane to produce wide and deep stopband. This structure is simpler in design and more compact in size compared to conventional bandstop structures. The simulation and measured results show good agreement in 2.6 GHz 20-dB rejection bandwidth at 4 GHz center frequency. This distinct stopband characteristic can be applied to devices such as filters, antennas and coplanar waveguide to suppress harmonics and enhance performances such as better gain and isolation.
Keywords :
band-stop filters; coplanar waveguides; low-pass filters; microstrip filters; bandstop structures; coplanar waveguide; deep stopband; hi-Z filter; low-Z filter; microstrip stepped-impedance lowpass filter; rejection bandwidth; stepped-impedance defected ground structure; Band pass filters; Cutoff frequency; Dielectric substrates; Electromagnetic waveguides; Metamaterials; Microstrip antenna arrays; Microstrip antennas; Microstrip filters; Patch antennas; Periodic structures; Defected ground structure; bandstop filter; electromagnetic bandgap; frequency spectrum; high impedance surface; lowpass filter; photonic bandgap;
Conference_Titel :
TENCON 2005 2005 IEEE Region 10
Conference_Location :
Melbourne, Qld.
Print_ISBN :
0-7803-9311-2
Electronic_ISBN :
0-7803-9312-0
DOI :
10.1109/TENCON.2005.300913
