CORNER TRUNCATED BROADBAND PATCH ANTENNA WITH CIRCULAR SLOTS

In this communication, a corner truncated broadband patch antenna with circular slots is presented. The proposed antenna is fabricated on 14 * 14 * 1.57 mm(3) Rogers RT5870 substrate (epsilon(r)=2.33 and loss tangent of 0.0012) and a 50- SMA connector is used for excitation. Bandwidth enhancement has been reported due to cutting of two circular slots and truncating the corners of the square patch, which gives rise to mode splitting phenomenon and better impedance matching. Simulated results show that the impedance bandwidth (S11<10 dB) of the proposed antenna is 19% (10.8-13.2 GHz). Measured results are in good agreement with the simulated results. The fractional bandwidth of the proposed antenna has enhanced from 8.5 to 19% as compared to the simple patch antenna, showing an enhancement of 123%. The peak gain of the proposed antenna is 7 dB. The antenna finds application in satellite communication, radar communication, and other alleged wireless communication services. Details and comparison of the proposed antenna with simple patch antenna have been described. (c) 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:845-849, 2015