Title :
Flexible CPW-Fed Fishtail-Shaped Antenna for Dual-Band Applications
Author :
Haiwen Liu ; Shuangshuang Zhu ; Pin Wen ; Xiang Xiao ; Wenquan Che ; Xuehui Guan
Author_Institution :
East China of Jiaotong Univ., Nanchang, China
Abstract :
A flexible fishtail-shaped antenna for WiMAX and X-band applications is presented in this letter. The proposed antenna is fed by a coplanar waveguide (CPW). Stepped-impedance lines that can provide smooth transitional impedance for improved impedance matching and broadband characteristics are also introduced. The antenna is printed on a 0.127-mm polytetrafluoroethene (PTFE) substrate and occupies a size of 25 × 50 mm 2. In the lower frequency band, the measured impedance bandwidth for | S11 | ≤ -10 dB is about 200 MHz from 3.4 to 3.6 GHz, while it is about 7 GHz from 7.4 to 14.4 GHz in the upper frequency band. In addition, the antenna demonstrates a low sensitivity to performance degradation due to bending effects, which makes it suitable for integration within portable devices.
Keywords :
WiMax; broadband antennas; coplanar transmission lines; coplanar waveguides; impedance matching; microstrip antennas; multifrequency antennas; WiMax; X-band applications; bandwidth 3.4 GHz to 3.6 GHz; bandwidth 7.4 GHz to 14.4 GHz; bending effects; broadband characteristics; coplanar waveguide; dual band applications; flexible CPW fed fishtail shaped antenna; impedance matching; polytetrafluoroethylene substrate; portable devices; size 0.127 mm; smooth transitional impedance; stepped impedance lines; Antenna measurements; Bandwidth; Frequency measurement; Impedance; Microstrip antennas; Coplanar waveguide (CPW)-fed; dual-band; fishtail -shaped patch; flexible antenna;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2317746
