Dual Band Circularly Polarized Antenna for Wireless/Vehicular/Satellite Applications

摘要

This paper introduces a dual band circularly polarized monopole antenna fed by a micro strip feed line. The antenna consist of L shaped and C shaped strips. L shaped strip is basically for lower band operation whereas the strip of C shape is used for upper band operation. The length and width of the antenna is 40mm and 47mm respectively and its thickness is 1.5mm. The simulated impedance bandwidth of the antenna proposed here is from (2.2-2.7GHz) in lower band and (4.4-8GHz) in upper band. The corresponding axial ratio bandwidth of the proposed antenna is (2.24-2.6GHz) in lower band and (5.20-6.80GHz) in upper band. The impedance bandwidth range and its corresponding axial ratio bandwidth covers 2.4/5.5/2.5 GHz WiMAX,2.4/5.2/5.8GHz WLAN and (5.85-5.925GHz) ITS band. All the results of the proposed antenna is simulated successfully.