Design and Analysis of a Compact Dual-Band Antenna for Wi-Max, C,and X-Band Applications

This paper presents a design of a compact-size dual-band antenna for Wi-Max, C, and X-band applications. The modified symmetrical step-sized slit is etched on the coplanar waveguide (CPW) ground plane. The radiating patch and CPW ground plane are designed on a 1.6 mm thick FR4 dielectric constant r=4.4 and tan =0.02 with a compact size of 1010 mm 2 . The antenna is designed to operate in dual-band. The Wi-Max band (5.2 GHz) is obtained by etching a split ring on the rectangular microstrip patch. The operating bandwidth is obtained from 5.22 GHz-5.38 GHz (3.72 %) and 7. . It has a maximum gain of 2.1 dBi at 7.9 GHz and radiation efficiency above 95%. The Co and cross-polarization level is -45 dB and -32 dB in E and H-plane at 5.3 GHz and -40 dB and -28 dB at 7.9 GHz, respectively.