Design of Inset Microstrip Patch Antenna for Wireless Power Transmission at 2.45 GHz

Wireless communication has been developed rapidly in the past decades and it already has a great impact on human life. In the field of wireless communications, antennas play a vitally important role. In the late 1970s, there was rapid development in the field of microstrip patch antenna technology. In early 1980s, antenna elements and arrays were developed in terms of design and modeling. Due to their advantages like light weight, reduced size, low cost, conformability, and the ease of integration with an active device, these antennas have been extensively studied. A microstrip patch antenna is the combination of a radiating patch on one side of the dielectric substrate and ground on the other side. The patch is generally made of a conducting material like gold or copper. The radiating patch and the feed lines are usually photo etched on the dielectric substrate. Microstrip patch antennas radiate primarily because of the fringing fields between the patch edge and the ground plane. Therefore, the antenna can be fed by a variety of methods. These methods can be classified into two categories: contacting and non-contacting. In the contacting method, the radio frequency (RF) power is fed directly to the radiating patch using a connecting element such as a microstrip line or probe feed. In the noncontracting method, electromagnetic field coupling is performed to transfer power between the microstrip line and the radiating patch which includes proximity feeding and aperture feeding [1, 2]. Microstrip antennas are characterized by a large number of physical parameters. They are designed to have many geometrical shapes and dimensions but rectangular and circular microstrip patches have been used in many applications. In this paper, the design of an inset feed rectangular microstrip patch antenna at 2.45 GHz for wireless communication is presented having length L, patch J. lnf. Commun. Converg. Eng. 10(2): 123-128, Jun. 2012 Regular Paper