DESIGN OF A FRACTAL DUAL-POLARIZED APERTURE COUPLED MICROSTRIP ANTENNA

In this paper, a fractal dual-polarized aperture-coupled microstrip antenna is presented. The proposed antenna adopts 1st Minkowski fractal patch and is fed by the aperture-coupled structure with H-shaped and H-shaped loaded capacitance. The size of Minkowski fractal patch is reduced by 20% compared with a square patch. Results show that the T/R isolation is better than 35dB, improved by 2dB compared with the double H-shaped slots. The gain is more than 8dB, and the front-back ratio is greater than 20dB in the operating frequency range. Both simulated and experimental results are in good agreement.