Title :
Design of Miniature Planar Dual-Band Filter Using Dual-Feeding Structures and Embedded Resonators
Author :
Chen, Chu-Yu ; Hsu, Cheng-Ying ; Chuang, Huey-Ru
Author_Institution :
Dept. of Electron. Eng., Southern Taiwan Univ. of Technol., Tainan
Abstract :
A new dual-band planar filter has been proposed. It is shown that the two transmission bands can be excited and designed using proposed resonators which combine different sizes of open-loop resonators. The main resonators control the low-band resonant frequency and the sub resonators control the high-band resonant frequency. With dual-feeding structures added, the performances of the filter such as frequency selectivity and insertion loss are much improved. The embedded resonators structure can further miniaturize the dimensions of the overall structure. The proposed dual-band filter will find applications in wireless communication circuits
Keywords :
UHF filters; band-pass filters; microwave filters; resonator filters; bandpass filters; dual-band filter; dual-feeding structures; embedded resonators; frequency selectivity; improved insertion loss; miniature filter; open-loop resonators; planar filter; resonant frequency; stepped-impedance resonator; wireless communication circuits; Band pass filters; Couplings; Dual band; Feeds; Microwave filters; Mobile communication; Passband; Radio frequency; Resonator filters; Wireless communication; Bandpass filters (BPFs); dual-band; dual-feeding structure; embedded resonators; open-loop ring resonators; stepped-impedance resonator (SIR);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2006.885621
