A Dual-band Z-shape Stepped Dielectric Resonator Antenna for Millimeter-wave Applications

Abstract

Dual-band antennas are important in communication systems which operate in more than one frequency band. In this paper, a dual-band z-shaped stepped dielectric resonator antenna (DRA) is presented for millimeter-wave (MMW) applications. There are a number of definitions describing antennas operating in the MMW bands. Most commonly, antennas operating in frequencies whose wavelengths are measured in millimeters (30–300 GHz) are referred to as MMW antennas. Here, a novel three-step z-shaped dielectric resonator antenna is excited by a simple microstrip line feeding mechanism. Simulation process was done by using a CST microwave studio suite 2010. The result shows that the proposed antenna achieves an impedance bandwidth from 57.14 to 61.04 GHz and 64.06 to 69.01 GHz covering 58.77 GHz (unlicensed) band allocated for the earth exploration-satellite (EES) (passive) and fixed mobile space research (passive) services radio astronomy and 66.07 GHz band also allocated for EES and fixed inter-satellite mobile except aeronautical mobile space research on a primary basis, but in this band, both active and passive operations are permitted. The proposed design can also be used for inter-satellite service applications which operate at 65–66 GHz. With these features, this design of z-shaped stepped DRA is suitable for dual-band wireless communication systems. The federal communications commission has allocated the frequency band from 57 to 64 GHz for unlicensed wireless systems. This system is primarily used for high-capacity, short-distance(less than 1 mile) communications by any one.