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N. L. Vamsi Priya.K,P. Pratyusha,K. Jagadeesh Babu 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.8
This paper presents a tri-band rectangular slotted circular micro strip antenna for wideband applications. The antenna operates at 2.96, 6.42 and 7.33 GHz frequency bands for VSWR<1 with an improved impedance bandwidth of 41.23%. The antenna has been designed and simulated on an FR4 substrate with dielectric constant (εr) of 4.4 with an overall size of 50 × 40 × 3.5 mm3. The study of bandwidth improvement is presented in this paper by introducing the slots on surface of circular patch. The measured bandwidths for -10 dB reflection coefficient are 410 MHz (2.80-3.21 GHz) and 3.07 GHz (5.91-8.98 GHz). The simulated results show that the proposed antenna provides good performance in term of return loss and radiation pattern for wideband applications.