Mahima Arrawatia

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An experimental RF energy harvesting system to harvest energy from cell towers is presented in this paper. An electromagnetically-coupled square microstrip antenna is designed and fabricated for deployment in the presented system. Antenna gain of 9.1dB and bandwidth from 877 MHz to 998 MHz is achieved. A Schottky diode-based single stage voltage doubler and(More)
In this letter, a broadband bent triangular omnidirectional antenna is presented for RF energy harvesting. The antenna has a bandwidth for VSWR ≤ 2 from 850 MHz to 1.94 GHz. The antenna is designed to receive both horizontal and vertical polarized waves and has a stable radiation pattern over the entire bandwidth. Antenna has also been optimized for(More)
This paper presents an energy harvesting system which extracts energy from radio frequency radiation for battery charging applications. It comprises of a new differential center tapped Micro strip antenna, off-chip matching circuit, on-chip novel CMOS rectifier and control circuitry in 180nm CMOS technology. For on-chip modules, thick oxide devices have(More)
This paper presents a battery-less power management circuit for RF energy harvesting applications. In general rectenna (antenna and rectifier) exhibits the maximum efficiency for a particular range of load resistance at different values of RF power received by the antenna. To track maximum power transfer and reduce the power overhead of the various modules(More)
Hippophae salicifolia D. Don or Sea buckthorn is one species that has great potential for improving ecological and economic developments in the mountain areas of North Sikkim. The plant is found naturally at altitudes ranging from 2,377 to 3,093 m. in riverine (river side or torrential side) and non-riverine (non river or non torrential side) areas where(More)
A differential microstrip antenna with improved gain for RF energy harvesting is presented in this paper. The developed antenna can be used in either center grounded or differential configuration. The antenna is designed and fabricated for GSM900 band (890-960 MHz). The antenna has a gain of 8.5 dBi at the center frequency and exhibits VSWR ≤ 2 for(More)
An RF energy harvesting system using a gap coupled microstrip antenna, designed and fabricated for 2.67 and 5.8GHz, is presented in this paper. Gain of 8.6dB and bandwidth of 100MHz has been achieved for antenna at 2.67GHz. A gain of 9dB and bandwidth of 690MHz is obtained for antenna at 5.8GHz. A CMOS rectifier topology designed in UMC 180nm CMOS process(More)
A broadband RF energy harvesting system for harvesting energy from 800 MHz to 2.5 GHz is presented. A passive voltage amplification scheme and inherent matching technique using higher antenna impedance is employed to enhance the output voltage of the rectifier. A planar broadband folded dipole antenna having an input impedance of 300Ω is designed and(More)
This paper presents a power management circuit for RF energy harvesting. Rectenna characteristics show that it gives maximum available power for a particular range of load resistance for different power received by the antenna. Therefore to harvest maximum available power, DC-DC boost converter is designed so that its input resistance is always equal to(More)
In this paper, a broadband rectenna array is designed and tested. The array is designed using a triangular monopole antenna. It has Su less than -10dB from 850 MHz to 2.6 GHz. The gain is greater than 3.5dBi from 900 MHz to 2.6 GHz and a maximum gain of 8.6dBi is achieved at 2 GHz. Efficiency of 76% and 29% is obtained for a resistive load of 560Ω at(More)