Title :
Controlling Resonances for a Multi-Wideband Antenna by Inserting Reactive Components
Author :
Choi, Hyengcheul ; Jeon, Sinhyung ; Yeom, Junghwan ; Cho, Oul ; Kim, Hyeongdong
Author_Institution :
Dept. of Electr. & Comput. Eng., Hanyang Univ., Seoul, South Korea
Abstract :
A novel method is proposed to control the resonance frequencies of an antenna for multi-wideband operation. The parallel addition of reactive components to an antenna shifts the resonance frequencies without increasing the size of the antenna. These resonance frequency shifts can be analyzed by observing the voltage difference via an approach based on an open-circuit transmission line. The designed antenna has 180 MHz (940-1120 MHz) and 630 MHz (1970-2600 MHz) bandwidths under VSWR=2.5:1 with a high radiation efficiency at dual-band. The lower and the higher bands of the antenna provide coverage for Global System for Mobile communications 900 (GSM900), Universal Mobile Telecommunications System 2100 (UMTS2100), Wireless Broadband (WiBro) and Bluetooth.
Keywords :
3G mobile communication; Bluetooth; broadband antennas; cellular radio; frequency control; multifrequency antennas; telecommunication transmission lines; Bluetooth; GSM900; UMTS 2100; WiBro; antenna shifts; bandwidth 180 MHz; bandwidth 630 MHz; multiwideband antenna; open-circuit transmission line; reactive components; resonance frequency control; resonance frequency shifts; Antenna measurements; Bandwidth; Capacitance; Helical antennas; Inductance; Resonant frequency; Multi-band antennas; printed circuit antennas and resonance perturbation;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2011.2158944
