Harvesting microwave energy from WiMax bands based on a Dual-Band Antenna

Abstract

There is pressure caused by increasing electromagnetic radiation in our areas, for example, UHF, VHF, WIFI, and WiMAX bands. In this context, the concept of energy recycling plays an important role. It is expected that WiMax technology with different standards is going to come to market (IEEE 802.16d and IEEE 802.16e). There are many cases where it is desirable to acquire energy form many radiofrequency stations, to produce electricity and efficiently charge any electronic device through the RF-DC conversion circuit. In general terms, the system is divided into two parts: Harvesting microwave energy around us and the RF-to-DC conversion circuit. The purpose of this work is to harvest microwave energy from two bands of operating frequencies ((f01 = 2.4GHz) and (f02 = 3.84GHz)) using Dual-band slot-loaded pin-fed linear-polarised rectangular patch antenna. The efficiency of acquiring RF depends on the amount and types of antenna and the efficiency of the RF-DC conversion circuit. However, the microwave energy obtained from the environment is usually at the scale of milliwatts which is a serious problem that limits the popularity of the WiMax power harvest. This paper presents a novel rectenna for highly efficient WiMax power harvesting. We evaluate the possible application of microwave harvesting, to charge a battery of a sensor.