A Compact Antenna with Dual Polarization for Mobile and Wireless Communication

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.