Coplanar slotted Circular Patch Antenna with Loaded Periodic Structure for RFID/WLAN/Wi-MAX/Satellite Communication

We describe a compact Ultra-wideband antenna with dimensions of 43mm×33mm×1.6 mm for RFID, WLAN, WiMAX, and satellite communication in the C-band in this work. The proposed design and simulation analysis of a circular monopole antenna with an octagon-shaped slot in the middle and a horizontal I-shaped slot on the top of a FR-4 substrate are presented in this work. Many RF bands like RFID, LTE, Wi-Fi, WLAN, Wi-MAX, satellite communication for C-band and X-band coexists in this band. The substrate having a relative permittivity of 4.4 is sandwiched by copper monopole patch on top with the copper defective ground and a loaded periodic structure at the bottom of the substrate. It achieves S 11 ≤ -10 dB in 2.45-11.3 GHz. We take the operating frequency at 3.5 GHz (Sub-6GHz), 5.8 GHz (RFID), and 6.165/4 GHz (satellite uplink/downlink at C-band) with a gain of 1.98 dBi, 3.96 dBi, and 2.78/2.05 dBi respectively.