A symmetric U-slot microstrip patch antenna design

In this paper a U-shaped slotted microstrip patch antenna that aims to work in 8.86–8.98GHz frequencies was designed and simulated. First antenna design was in shape of U- slot, then it was changed into [] shaped slot. Sonnet Suites version 13.56 was used as simulation program [1]. Air thickness is 20mm and the distance between ground ant the patch is 5mm. S11 is nearly −11.20dB. Antenna has 7.55dB gain at resonance frequency.