A Novel Dual Polarized Dual Band Antenna for Wireless Backscattering Applications

Abstract

This chapter presents a compact patch antenna for backscattering application. The model utilizes a crossed slot etched on single layer low loss substrate. The dimensions of the radiating patch are tuned through parametric analysis of the model in order to improve cross-polarization (dB) isolation and the axial ratio beamwidth of the antenna, and the results are compared with other conventional antennas. The antenna attains an impedance characteristic of -17.65dB at 2.15GHz and -22.28 dB at 2.4GHz operating frequency and provides an impedance bandwidth (|S11|≤-10dB) of 60MHz ant both bands. The antenna achieves a maximum gain of 6.8dB at 2.15GHz and 7.3dB at 2.4GHz in the direction of propagation. The antenna also gives a cross-polarization (dB) of -12 dB for a wide beam angle. Finally, a good agreement has been obtained for using the proposed design for modern dual-band wireless backscattering applications.