Title :
Dual-mode wide-band and dual-band resonators with Minkowski-island-based fractal patch for WLAN systems
Author :
Liu, Ji-Chyun ; Kuei, Ching-Pin ; Chang, Chung Chi ; Liu, Hsin-Hsiang
Author_Institution :
Dept. of Electr. Eng., Ching Yun Univ., Taoyuan, Taiwan
Abstract :
The miniaturized dual-mode band-pass filters (BPF) using Minkowski-island-based (MIB) fractal patch resonator are proposed in this paper. The BPF is mainly formed by a square patch resonator in which a MIB fractal configuration with 2nd order iteration is embedded in the patch. By the perturbation and the T-couple/inter-digital coupling, the wide-band and dual-band responses are obtained respectively. For wide-band design, at 2.41 GHz it has good measured characteristics including the wide bandwidth of 2.26-2.56 GHz (3-dB fractional bandwidth of 12.4%), low insertion loss of 0.72 dB, high rejection level (-52.5/-44.9 dB), and patch size reduction with 60.6%. For dual-band design, the proposed filter covers the required bandwidths for WLAN band (2.23-2. 98 GHz and 4.79-5.8 GHz) applications.
Keywords :
UHF filters; UHF resonators; band-pass filters; microstrip resonators; resonator filters; wireless LAN; 2nd order iteration; Minkowski-island-based fractal patch resonator; T-couple-inter-digital coupling; WLAN systems; bandwidth 2.23 GHz to 2.98 GHz; bandwidth 4.79 GHz to 5.8 GHz; dual-mode wideband resonator; frequency 2.41 GHz; loss 0.72 dB; miniaturized dual-mode band-pass filters; Dual band; Fractals; Frequency measurement; Q measurement; Resonant frequency; Scattering parameters; Wireless LAN; Dual-mode; Fractal patch resonator; Minkowski-island;
Conference_Titel :
Cross Strait Quad-Regional Radio Science and Wireless Technology Conference (CSQRWC), 2011
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-9792-8
DOI :
10.1109/CSQRWC.2011.6037017
