A Compact Antenna with Dual Polarization for Mobile and Wireless Communication

Abstract

In this paper, a dual-polarized antenna fed by CPW is presented. The proposed includes a conductor on the ‎radiator and has defected ground, so it has been achieved as an omnidirectional antenna which makes it a low loss, ‎and a simple antenna which is appropriate for a wireless communication system. By imposing the different ‎circumstances of U-shape elements on the ground, the features of antennas have been improved. The scattering ‎characteristic of the antenna are less than -20 dB with high impedance matching at 2.2GHz, 4.8GHz, and 6.6GHz. ‎Also, the antenna covers 400 MHz bandwidth from 2 GHz to 2.4 GHz, 500 MHz bandwidth from 4.6 GHz to 5.1 GHz, ‎and 1.3 GHz bandwidth from 5.7 GHz to 7 GHz, respectively. In addition, the maximum gain of the antenna is almost ‎‎10 dB. The simple and compact antenna with an overall size of 25x20mm2 is designed on an FR-4 substrate with 0.8 ‎mm thickness. On the one hand, the structure is fabricated and tested. The results of the antenna have shown that ‎the measured results agree with the simulated results; The performance of the antenna with CPW-fed, consisting of ‎compact size, circular polarization, and suitable gain at resonance frequencies, make it a suitable choice for the ‎communication system and the portable device.‎

Keywords

• small antenna
• parasitic elements
• circular polarization
• wireless communication systems