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An UWB bandpass filter with notched band using embedded fold-slot feed and three-slotted resonator

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7 Author(s)
Meeloon, M. ; Dept. of Special Investig. (DSI), Bur. of Technol. & Inf. Syst. Center, Bangkok, Thailand ; Jeeracheeweekul, V. ; Mahatthanathawee, S. ; Ngamkhum, J.
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In this paper, an ultra-wideband bandpass filter based on slotted linear tapered-line resonator (SLTR) with embedded fold-slot feed structure for notched band is presented. The embedded fold-slot feed at the end of resonator will be comprehensively described. The proposed filter has narrow notch in the passband, resulting from the embedded fold-slot feed. The center frequencies and bandwidths of the notched band can be easily adjusted by tuning the length and width of the embedded fold-slot parameters. The wider upper stopbands caused by resonator characteristics have been also obtained. The simulated and experimental results show narrow notched bands around 270 MHz. High stopband performances with better than 10 dB for a frequency range up to 18 GHz have also been obtained.

Published in:

Intelligent Signal Processing and Communications Systems (ISPACS), 2011 International Symposium on

Date of Conference:

7-9 Dec. 2011