Title :
Narrowband filters with tightly coupled resonators
Author :
Fathelbab, Wael M. ; Almalkawi, Mohammad J.
Author_Institution :
Dept. of Electr. & Comput. Eng., South Dakota Sch. of Mines & Technol., Rapid City, SD, USA
Abstract :
The design of narrowband combline filters implemented in double-layered microstrip is presented. The filters realise finite-frequency transmission zeros located within close proximity with respect to their passband edges. This is achieved by tightly coupling the resonators of the filters. Experimental evaluation of several fabricated filters demonstrates the principle.
Keywords :
band-pass filters; microstrip filters; resonator filters; double-layered microstrip; finite-frequency transmission zeros; narrowband combline filters; passband edges; tightly coupled resonators;
Journal_Title :
Microwaves, Antennas & Propagation, IET
DOI :
10.1049/iet-map.2008.0330
