The antenna is terminated on the right‐hand (RH) side with a grounded 50‐Ω resistive load in order to reduce any impedance mismatch and thereby enhance the antenna's performance.
METAMATERIAL CST MICROWAVE STUDIO PATCH
Geometry of an innovative ultra‐wideband (UWB) antenna in Figure 1 shows that it is essentially a patch antenna with a rectangular slot. Each of the branched radiators generates triple resonant frequencies within the L‐, S‐, C‐ and X‐bands. A novel antenna structure referred to as ‘hexa‐band’ coplanar waveguide (CPW)‐fed antenna, which is presented in part 3, consists of asymmetric fork‐shaped‐radiating elements incorporating U‐shaped radiators with a slit. Parametric study is undertaken to demonstrate how the MTM unit‐cell's parameters affect the antennas performance in terms of gain, radiation efficiency, and radiation patterns. It is shown that the dimensions of such patches have a considerable influence on the radiation characteristics of the antenna. The design of the UWB antenna is achieved by embedding E‐shaped dielectric slits in the radiating patches. In reality, the MTM antenna structure is more accurately described as a composite right‐/left‐handed transmission line (CRLH‐TL) structure due to the resulting parasitic capacitance and inductance effects. The UWB antenna presented in part 2 is based on metamaterial (MTM) transmission lines. In this chapter, novel and compact planar antennas are presented including ultra‐wideband (UWB) and hexa‐band antennas.