Study and Design of Broadband Bow-tie Slot Antenna Fed With Asymmetric CPW

Author

Lina Xu ; Li Li ; Wenmei Zhang

Author_Institution

Coll. of Phys. & Electron., Shanxi Univ., Taiyuan, China

Volume

63

Issue

2

fYear

2015

fDate

Feb. 2015

Firstpage

760

Lastpage

765

Abstract

In this communication, a new style of broadband bow-tie slot antenna with an improved gain is presented. It is fed by an asymmetric coplanar waveguide (ACPW) with different slot lengths. By adjusting the length of one ACPW slot, the impedance characteristic of the antenna is greatly improved so that the bandwidth is broadened. Meanwhile, to improve the gain at low frequency band, a loop strip is added in the bow-tie slot. The simulated and measured results show that the proposed antenna can operate from 2.76 GHz to 8.1 GHz and the relative bandwidth is 100.4%. Furthermore, the flatter gain within the operating frequency band is obtained and the maximum gain at beam peak reaches 5.53 dBi.

Keywords

UHF antennas; antenna feeds; bow-tie antennas; broadband antennas; coplanar waveguides; slot antennas; ACPW slot; antenna impedance characteristic; asymmetric CPW; asymmetric coplanar waveguide; broadband bow-tie slot antenna design; frequency 2.76 GHz to 8.1 GHz; loop strip; slot lengths; Bandwidth; Broadband antennas; Coplanar waveguides; Gain; Impedance; Slot antennas; Bow-tie slot; broadband; coplanar waveguide (CPW)-fed; flexible antenna;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2014.2378265

Filename

6977897