Abstract

A novel miniaturized dual-band slotted patch antenna for radio frequency identification (RFID) applications in the microwave band (2.45 and 5.8 GHz) has been proposed. It consists of patch excited by a 50 ohms microstrip-line on the top layer, and a rectangular ground plane on the bottom layer. They are made of a perfect electrical conductors. The antenna has an overall size of 26×28mm2 and set on an FR4 substrate with constant dielectric permittivity 4.3, thickness of 1.6mm and loss tangent of 0.025. The antenna is designed with acceptable gain, low profile and cheap cost achievement. A good impedance bandwidth of 106 MHz has been achieved from 2.39 to 2.496 GHz for the lower band, while the upper band covers 579 MHz (from 5.585 to 6.164 GHz). The gain obtained into simulation of this antenna is 2.09 dB at 2.45GHz and 3.51 dB at 5.8 GHz. The proposed antenna is a great candidate for universal microwave RFID applications. The simulation results was achieved by using CST Microwave Studio electromagnetic and high frequency structural simulator (HFSS) solvers.

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