A Compact Second-order Chebyshev Bandpass Filter Using U-shaped Resonator and Defected Ground Structure

Radioengineering

卷:29

关键词: bandpass filter;    chebyshev response;    filter synthesis;    high selectivity;    u-shaped resonator;    defected ground structure (dfs);   

DOI  :  

来源: DOAJ

【 摘 要 】

A compact bandpass filter using U-shaped resonators and Defected Ground Structures is proposed and designed at 5.8 GHz.The U-shaped resonators are placed around an indirectly coupled feed line while the Defected Ground Structures are positioned beneath them. The U-shaped resonator and U-shaped Defected Ground Structure are responsible for the high and low band rejection respectively. The proposed bandpass filter obeys the second order Chebyshev response which has low insertion loss of – 1.87 dB, high rejection level and a sharp roll-off performance. The design is carried out using CST Microwave studio. The design is verified by fabricating and measuring the prototype in the laboratory. A good agreement is observed between the simulated and measured results.

【 授权许可】

Unknown