Title :
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
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 (epsivr = 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;
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
DOI :
10.1109/LAPC.2008.4516948
