A CPW-fed bow-tie slot antenna with tuning stub

Author

Marantis, Leonidas ; Brennan, Paul

Author_Institution

Dept. of Electron. & Electr. Eng., Univ. Coll. London, London

fYear

2008

fDate

17-18 March 2008

Firstpage

389

Lastpage

392

Abstract

In this paper, a modified slot bow-tie antenna fed by a coplanar waveguide (CPW) is investigated for wideband operation. It is designed to work on a thin substrate (h = 0.787 mm) with a low dielectric constant (epsiv_r = 2.2) operating at two frequencies (1.8 and 2.4 GHz). Two metal stubs are introduced in the middle of the bow-tie slot in order to achieve a wider impedance bandwidth over the conventional CPW-fed bow-tie slot antenna. The antenna is fabricated and tested in the antenna measurement facility of UCL and experimental far-field results are presented showing low cross-polarisation levels. The bow-tie slot antenna can obtain at least 55% bandwidth.

Keywords

UHF antennas; antenna feeds; bow-tie antennas; broadband antennas; coplanar waveguides; permittivity; slot lines; antenna feeds; coplanar waveguide; dielectric constant; frequency 1.8 GHz; frequency 2.4 GHz; impedance bandwidth; slot bow-tie antenna; tuning stub; wideband antenna; Bandwidth; Broadband antennas; Coplanar waveguides; Dielectric constant; Dielectric substrates; Frequency; Impedance; Slot antennas; Testing; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Conference, 2008. LAPC 2008. Loughborough

Conference_Location

Loughborough

Print_ISBN

978-1-4244-1893-0

Electronic_ISBN

978-1-4244-1894-7

Type

conf

DOI

10.1109/LAPC.2008.4516948

Filename

4516948