Miniaturization Of Dielectric Antenna Analysis And Simulation

With the rapid development of e-commerce in recent years, various kinds of handheld devices have been developed for indoor scenarios, such as family application, office environment and downtown shopping centers, as well as some outdoor scenarios, such as short distance wireless and mobile communication. The demand is ever growing. However, smart antenna has not been applied extensively in wireless mobile terminals and handheld devices, for reasons of size and power consumption.Electronically steerable multiplebeam antenna is a promising technique developed in recent year. Compared with traditional antennas, ESMB antennas provide better security, better wireless performance. Security problems could be greatly mitigated in the link layer, since electronically steerable multiple beam antenna could discern real signal from garbage signal. Besides, electronically steerable multiple beam antenna gives better performance because resource is allocated to the real users rather than the garbage users. For the purpose of mobility, antenna size is one of the focuses of the design process. Besides, it is always the focus of study to improve spectrum efficiency and reduce power consumption in a convenient way. Electronically steerable passive array antenna provides the feature of steerable radiation pattern, maximized signal to noise ratio, and reduced transferred power because of its main lobe gain. The directionality of smart antenna also helps to reduce the health concern for antennas.In this paper, a dielectrically embedded smart antenna is analyzed, using an electronically steerable passive array radiator with a central feed element and six parasitic elements uniformly arranged on a ring, embedded in dielectric material with a relative permittivity of 6 to reduce the antenna size. The antenna is a hexagon shaped antenna with four controllable parameters. Finite element method is applied to simulate the antenna. The simulated 6 main direction pattern is given together with S11 curve. Then, we analyze the influence of dielectric material towards the return loss of the antenna. We provide the simulated results of embedding the electronically steerable multiple beam antennas in various materials.Then, two-layered ESMB antenna is analyzed and the results are given, followed by the analysis of its advantage towards the traditional single-layered ESMB antenna.