Title :
Compact multi-notched UWB bandpass filter using E-shape microstrip structure
Author :
Hammed, R.T. ; Mirshekar-Syahkal, D.
Author_Institution :
Sch. of Comput. Sci. & Electron. Eng., Univ. of Essex, Colchester, UK
Abstract :
In order to prevent interference with some selected narrowband communication channels, UWB filters with rejections at these bands are preferred or sometimes necessary for some UWB systems. In this paper, for the first time, a technique for generating rejection notches in the miniaturized UWB filters employing the E-shape microstrip structure is presented. It is shown the attenuated bands can be achieved by capacitively coupling grounded quarter wavelength (λg/4) stub or E-shape microstrip structures to the main filter structure. The performances of a second-order filter with a single rejection notch and a third-order filter with one and two rejection notches are evaluated using an accurate equivalent circuit model as well as by simulation and measurement. The dimensions of the third-order filter are about 4 mm × 4.2 mm × 0.4 mm excluding the feeding ports.
Keywords :
band-pass filters; microstrip filters; notch filters; ultra wideband technology; E-shape microstrip structure; equivalent circuit model; feeding ports; multinotched UWB bandpass filter; narrowband communication channels; rejection notches; second order filter; size 0.4 mm; size 4 mm; size 4.2 mm; third order filter; Band-pass filters; Equivalent circuits; Integrated circuit modeling; Microstrip; Microstrip filters; Microwave filters; Resonator filters; E-shape microstip structure; Multi-notched BPF; bandpass filter; ultra-wideband filter;
Conference_Titel :
Microwave Integrated Circuits Conference (EuMIC), 2012 7th European
Conference_Location :
Amsterdam
Print_ISBN :
978-1-4673-2302-4
Electronic_ISBN :
978-2-87487-026-2
