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2013-08-16
A Compact Tunable Dual-Band Bandpass Filter Based on Substrate Integrated Waveguide and Defected Ground Structure
By
Progress In Electromagnetics Research Letters, Vol. 41, 193-203, 2013
Abstract
A compact tunable dual-band bandpass filter (BPF) based on substrate integrated waveguide (SIW) and defected ground structure (DGS) is investigated in this paper. The second passband can be flexibly controlled by changing the dimensions of the up-down DGSs whereas the first passband is fixed. The proposed filter exhibits improved selectivity due to the introduction of four left-right DGSs generating transmission zeroes. To verify the design method, a compact dual-band filter with the second center frequency switched among 5.4 GHz, 5.8 GHz, 6.4 GHz and 6.8 GHz and the first center frequency fixed at 4.78 GHz, is designed and fabricated. The simulated and measured results are in good agreement with each other.
Citation
Zhudan Wang, Feng Wei, Li Zhang, and Xiao-Wei Shi, "A Compact Tunable Dual-Band Bandpass Filter Based on Substrate Integrated Waveguide and Defected Ground Structure," Progress In Electromagnetics Research Letters, Vol. 41, 193-203, 2013.
doi:10.2528/PIERL13062503
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