Dual Band Microstrip-Fed Printed Antennas for Wireless Applications

In this paper, the performance of two dual-band printed fed-fed antennas is investigated, which have circular and hexagonal geometrical shapes. The hexagonal antenna shows the centre frequencies 1.6GHz and 3.8GHz and the circular antenna operates on 1.6GHz and 4GHz. These dual band antennas show the good simulated return loss and radiation characteristics. The proposed antenna designs are simulated on electromagnetic (EM) simulation software using FR-4 substrate with dielectric constant of 4.4 and thickness of 1.6 millimeter(mm). The proposed antennas have compact structures, the total size is 60×64 mm² and fed with 50Ω micro strip line by optimizing the width of partial ground. With the design, the return loss is lower than -10dB. A single rectangular slot is cut to obtain dual band operation. The proposed antenna is easy to integrate with microwave circuitry for low manufacturing cost. The antenna structure is flat, and its design is simple and straightforward. These antennas can be used in wireless communication.