Title :
Improving the stopband of the UWB bandpass filter with a novel compact 1-cell CRLHTL geometry with additional nulls
Author :
Kahng, Sungtek ; Ju, Jeongho
Author_Institution :
Dept. of Info. & Telecomm. Eng., Univ. Of Incheon, Incheon
Abstract :
Previously, we suggested the unprecedented design of a very compact UWB bandpass filter, which is based on the 1-cell microstrip Composite Right- and Left-Handed Transmission-line(CRLH-TL). Though the design result turned out satisfactory in terms of Bandwidth, Insertion Loss, Return Loss, Group Delay variation and so on, it had a narrow stopband beyond the upper passband edge. Therefore, we present the improved design to widen the stopband from dasia10.6 GHz~12.6 GHzpsila to dasia10.6 GHz~14.6 GHzpsila by modifying the original structure to create additional nulls(or poles), and the resultant structure is still as small as dasiaguided wavelength(lambdag)/9.4psila.
Keywords :
band-pass filters; band-stop filters; network synthesis; 1-cell microstrip composite right-and left-handed transmission-line; UWB bandpass filter; compact 1-cell CRLHTL geometry; frequency 2.6 GHz to 14.6 GHz; stopband filter; Band pass filters; Bandwidth; Circuits; Delay; Geometry; Insertion loss; Microstrip filters; Passband; Resonance; Telecommunications;
Conference_Titel :
Antenna Technology, 2009. iWAT 2009. IEEE International Workshop on
Conference_Location :
Santa Monica, CA
Print_ISBN :
978-1-4244-4395-6
Electronic_ISBN :
978-1-4244-4396-3
DOI :
10.1109/IWAT.2009.4906943