Abstract
A novel compact rectifier for dual-band operation in the RF energy harvesting is presented. The circuit comprises a 4th order dual-band impedance matching and a single-series circuit with one double diode, both are integrating into a compact shape to occupy a small area of 30×35mm2. The merit of the proposed rectifier circuit is that it can be extended to n number of the frequency band by using only 2×n matching elements. To validate the design method experimentally, a prototype of a dual-band rectifier is fabricated for two public telecommunication bands of GSM-900 and 1800. In order to reduce the circuit complexity and sensitivity arising due to lumped elements, the meander line and the open stub are used to realize the proposed circuit. A good agreement is obtained between the simulation and the measurement. The measured results show that the proposed rectifier circuit exhibits the conversion efficiency of 25.7 and 65% for an input power of -20 and 0 dBm, respectively. In addition, diode nonlinearity w...
Highlights
A revolutionary growth in wireless technology attracts huge attention from research community to make the self-sustainable device feasible through radio frequency (RF) energy harvesting
Since the ambient RF energy is distributed in multiple frequency bands, the amount of energy harvested could increase if the circuit is designed for multiple frequency bands
It consists of three major blocks viz; antenna, matching network (MN), diode detector followed by an energy storage
Summary
With rapid growth in wireless communication, a huge amount of radio frequency (RF) energy broadcasted through billions of microwave sources such as mobile phones, handheld radios, and radio broadcast stations. It is meaningful to collect and supply it to many electrical devices like mobile headsets, wearable medical sensors through RF energy harvesting. Since the ambient RF energy is distributed in multiple frequency bands, the amount of energy harvested could increase if the circuit is designed for multiple frequency bands. We present a compact dual-band energy harvesting circuit to harvest energy from two most useful frequency bands, GSM-900 and 1800. The merit of the proposed rectifier circuit is it can be extended to n number of the frequency band by using only 2 × n matching elements. The total size of the rectifier is about 30 × 35 mm
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