Title :
High Selective Microstrip Bandpass Filter and Diplexer With Mixed Electromagnetic Coupling
Author :
Jian-Kang Xiao ; Min Zhu ; Yong Li ; Li Tian ; Jian-Guo Ma
Author_Institution :
Sch. of Electro-Mech. Eng., Xidian Univ., Xi´an, China
Abstract :
A high selective bandpass filter and a high isolation diplexer by using mixed electromagnetic coupling have been presented. The filter transmission zeros (TZs) are attributed to the mixed electromagnetic coupling, and additional resonators are not required. TZs also can be adjusted by controlling the electric and magnetic couplings. The diplexer is fabricated and measured, and the new design is demonstrated by measurement. The diplexer has a compact size of 0.483λg×0.585λg, and a measured high isolation of no less than 42 dB.
Keywords :
band-pass filters; electromagnetic coupling; microstrip couplers; microstrip filters; microstrip resonators; resonator filters; filter transmission zeros; isolation diplexer; microstrip bandpass diplexer; microstrip bandpass filter; mixed electromagnetic coupling; Band-pass filters; Electromagnetic coupling; Filtering theory; Microwave filters; Resonant frequency; Bandpass filter (BPF); diplexer; isolation; mixed electromagnetic coupling; transmission zero (TZ);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2015.2495194
