Title :
Compact dual-band BPF with SR and SMR for wideband and WLAN applications
Author :
Hong-wei Deng ; Yongjiu Zhao ; Ying He ; Sheng-li Jia ; Min Wang
Author_Institution :
Key Lab. of Radar Imaging & Microwave Photonics, Minist. of Educ., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Abstract :
A compact dual-band bandpass filter (BPF) with a slotline resonator (SR) and a short stub centre-loaded microstrip resonator (SMR) is proposed for wideband and wireless local area network (WLAN) applications. The high-impedance microstrip feedlines for the filter with the SMR can function as the quarter-wavelength resonators for the filter with the SR to realise a wideband passband. Owing to the source-load coupling, the loaded short stub and the intrinsic characteristics of the SMR, three transmission zeros can be created to improve selectivity and isolation. Compact size can be obtained by adopting the folded SR and folded SMR inserted between the arms of the SR. A compact dual-band BPF for wideband and WLAN applications is simulated and measured, and good agreement can be obtained between the measured and simulated results.
Keywords :
band-pass filters; broadband networks; microstrip lines; microstrip resonators; slot lines; wireless LAN; BPF; QWR; SMR; WLAN applications; compact dual-band bandpass filter; high-impedance microstrip feedlines; loaded short stub; quarter-wavelength resonators; short stub centre-loaded microstrip resonator; slotline resonator; source-load coupling; transmission zeros; wideband network applications; wideband passband; wireless local area network applications;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2014.0634
