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Analysis and Research of UWB Filters Based on Defected Ground Structure

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Tutor: XuLiQin
School: Nanjing University of Posts and Telecommunications
Course: Electromagnetic Field and Microwave Technology
Keywords: DGS structure,Parallel coupled lines,Ultra-wideband band-pass filter,Ultra-wideb
CLC: TN713
Type: Master's thesis
Year:  2012
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Abstract:
Among the various communication systems, filters are essential. This thesis optimizes the classic dumbbell-shaped DGS UWB filter, make a point of UWB filter based on shuttle structure DGS, and innovative design of ultra-wideband band-pass filter. The design of the filter is completed on HFSS in the article, which is simulation software from Ansoft.Firstly, this thesis optimizes the classic dumbbell-shaped DGS UWB filter with slot on the classic dumbbell-shaped DGS structure, which increases the capacitive of the circuit.. Then this paper makes a point of UWB filter based on shuttle structure DGS base on the work above. After that, I analysis the filter performance with different shuttle structure DGS. Last , on the basis of two points above, this thesis design a circuit element of Ultra-wideband band-pass filter. And analysis the filter performance with different shapes ring.This thesis designs Ultra-wideband band-pass and high-pass filter with slot on the bottom of the parallel coupled-line and analysis the parameters affect the filter performance. The conclusion included in the thesis has reference value to design Ultra-wideband band-pass and high-pass filter.
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