Mesh-Type Split-Ring Resonator as Parasitic Radiator for SAR Reduction in Mobile Handset

Abstract

The cellular personal communications system has marked a phenomenal and intensive development and its cons have been observed lately. A lot of work has not been dispensed to minimise the hazardous effects. Thus, the protection toward a person's head and safeguarding from the radiations of non-ionizing electromagnetic signals produced by cellular phones while in use is fetching one of the most concerned tasks to neutralize to an infinitesimally small amount. Since planar inverted-F antenna (PIFA) is a very favoured design in mobile applications, it is of prime importance to analyze the matching properties of such an antenna in real application scenarios (i.e., in close proximity to the head, grasped by the hand). Any matching deviation leads to the reduction of radiated power which should be accounted for in the system design. Different specifications of the proposed antenna are measured through simulations in free space as well as in the presence of the human head model. Specific absorption rate (SAR) is also computed for this antenna, and the interaction of the antenna with the human body is also investigated. The results of elaborated antenna design that have minimized radiation toward the user's head are presented in this paper. © Springer India 2015.