Compact CPW-Fed Ultra Wideband Antenna using Liquid Crystals Substrates

Sihem Missaoui; Sayed Missaoui; Mohsen Kaddour

A novel design of a compact coplanar waveguide-fed (CPW) ultra wideband antenna (UWB) using Liquid Crystals Substrates (LCs) for microwave applications is presented. This technique is used to reduce the cost and the overall volume of microwave subsystem especially in wireless communication systems. The proposed reconfigurable antenna based on LCs with DC voltage satisfies the return loss requirement of less than -10dB with a voltage standing wave ratio (VSWR) less than 1.6 for entire operating frequency range of 3GHz to 11 GHz. The variation of the simulation resonance frequency before and after applying a continuous voltage is respectively 1.2GHz and 400MHz corresponding to a frequency agility of 26.08% and 8%. To enhance impedance bandwidth, notches and stubs at the rectangular radiation patch were used. This method based on LCs can be used to reduce the size of the antenna, increase the peak gain and achieved a good return loss. The simulated results are compared with experimental data, and good agreement is obtained.

Select Volume / Issues:

• Volume 6,Issue 4, July 2015

Year:

2015

Type of Publication:

Article

Keywords:

Liquid Crystals; CPW-Fed; UWB Antenna; Agile Structure

Journal:

IJECCE

Volume:

6

Number:

4

Pages:

539-542

Month:

July