Title :
Tri-Band Bandpass Filters Based on Dual-Plane Microstrip/DGS Slot Structure
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China (UESTC), Chengdu, China
Abstract :
Tri-band bandpass filters based on a dual-plane structure with improved band allocation is proposed in this letter. The dual-plane structure is consisting of both a microstrip and a defeated ground structure (DGS) slot. The slot with interdigital shape in the DGS is designed to obtain dual-frequency responses and transmission zeros are introduced to split one of the single bands into two. Two design examples with different frequency responses and band allocations are presented. All results obtained from the equivalent-circuit model and full-wave simulation are conformed by measurement.
Keywords :
band-pass filters; microstrip filters; band allocation; defeated ground structure slot; dual-frequency response; dual-plane microstrip/DGS slot structure; equivalent circuit model; full wave simulation; tri-band bandpass filter; Defeated ground structure (DGS); dual-plane structure; equivalent circuit; microstrip; tri-band bandpass filter (BPF);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2010.2049348
