Compact UWB bandpass filter on hybrid microstrip/slotline structure with improved out-of-band performances
Li R.; Zhu L.
Source Publication2008 International Conference on Microwave and Millimeter Wave Technology Proceedings, ICMMT
AbstractA compact ultra-wideband (UWB) bandpass filter with good in-band and out-of-band performances is proposed and implemented on hybrid microstrip/slotline structure. A multiple-mode slotline resonator with stepped-impedance configuration is first properly constructed, aiming to allocate its first three resonances occurring at desired positions within the UWB passband. Two 50 Ω microstrip feed lines are then placed perpendicular to this slotline resonator on the opposite side of the substrate. As a result, an initial back-to-back microstrip-slotline bandpass filter is constituted with the targeted UWB passband. Later the slotline resonator is twisted and an additional coupling between two open-ends of feed lines is introduced, resulting in miniaturizing its overall circuitry size and enhancing the roll-off skirts out of the passband. In final, defected ground structures (DGSs) are formed on the two feed lines to improve the upper stopband performance. Two UWB bandpass filters are designed, fabricated and measured. Measured results demonstrate an UWB passband from 3.25 to 10.21 GHz with in-band return loss >10.43 dB and group delay variation < 0.34 ns. ©2008 IEEE.
URLView the original
Fulltext Access
Citation statistics
Document TypeConference paper
AffiliationNanyang Technological University
Recommended Citation
GB/T 7714
Li R.,Zhu L.. Compact UWB bandpass filter on hybrid microstrip/slotline structure with improved out-of-band performances[C],2008:6-9.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Li R.]'s Articles
[Zhu L.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li R.]'s Articles
[Zhu L.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li R.]'s Articles
[Zhu L.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.