Design of low power Rectenna for wireless power transfer

Ramachandran, Selvakumaran; Liu, W.; Soong, Boon‐Hee; Ming, Luo; Sum, Yee Loon

doi:10.1109/tencon.2009.5395942

Cited by 9 publications

(3 citation statements)

References 6 publications

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“…The aforementioned designs were reduced by modifying the basic patch shapes and embedding suitable slots in the radiating patch. Table 6 briefly does the comparison of Figure 22 on the basis of changes done on their basic shape and their corresponding percentage of size reduction, whose detailed description is present in [76], respectively. Table 6.…”

Section: Antenna Miniaturizationmentioning

confidence: 99%

Microwave Antennas for Energy Harvesting Applications

Elsheakh¹

2017

Microwave Systems and Applications

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In the last few years, the demand for power has increased; therefore, the need for alternate energy sources has become essential. Sources of fossil fuels are finite, are costly, and causes environmental hazard. Sustainable, environmentally benign energy can be derived from nuclear fission or captured from ambient sources. Large-scale ambient energy is widely available and large-scale technologies are being developed to efficiently capture it. At the other end of the scale, there are small amounts of wasted energy that could be useful if captured. There are various types of external energy sources such as solar, thermal, wind, and RF energy. Energy has been harvested for different purposes in the last few recent years. Energy harvesting from inexhaustible sources with no adverse environmental effect can provide unlimited energy for harvesting in a way of powering an embedded system from the environment. It could be RF energy harvesting by using antennas that can be held on the car glass or building, or in any places. The abundant RF energy is harvested from surrounding sources. This chapter focuses on RF energy harvesting in which the abundant RF energy from surrounding sources, such as nearby mobile phones, wireless LANs (WLANs), Wi-Fi, FM/AM radio signals, and broadcast television signals or DTV, is captured by a receiving antenna and rectified into a usable DC voltage. A practical approach for RF energy harvesting design and management of the harvested and available energy for wireless sensor networks is to improve the energy efficiency and large accepted antenna gain. The emerging self-powered systems challenge and dictate the direction of research in energy harvesting (EH). There are a lot of applications of energy harvesting such as wireless weather stations, car tire pressure monitors, implantable medical devices, traffic alert signs, and mars rover. A lot of researches are done to create several designs of rectenna (antenna and rectifier) that meet various objectives for use in RF energy harvesting, whatever opaque or transparent. However, most of the designed antennas are opaque and prevent the sunlight to pass through, so it is hard to put it on the car glass or window. Thus, there should be a design for transparent antenna that allows the sunlight to pass through. Among various antennas, microstrip patch antennas are widely used because they are low profile, are lightweight, and have planar structure.

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Section: Antenna Miniaturizationmentioning

confidence: 99%

Microwave Antennas for Energy Harvesting Applications

Elsheakh¹

2017

Microwave Systems and Applications

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“…The power dissipation because of harmonics is significantly minimized by using an optimized filter at the output of the rectifier circuit. The output filter also determines the output voltage ripple and diode peak current [31]. In this design, the L-impedance matching section works together with the diode as a charge pump circuit.…”

Section: Delon Voltage Doubler Rectifiermentioning

confidence: 99%

RF rectifiers for EM power harvesting in a Deep Brain Stimulating device

Hosain

Kouzani

Tye

et al. 2015

Australas Phys Eng Sci Med

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A passive deep brain stimulation (DBS) device can be equipped with a rectenna, consisting of an antenna and a rectifier, to harvest energy from electromagnetic fields for its operation. This paper presents optimization of radio frequency rectifier circuits for wireless energy harvesting in a passive head-mountable DBS device. The aim is to achieve a compact size, high conversion efficiency, and high output voltage rectifier. Four different rectifiers based on the Delon doubler, Greinacher voltage tripler, Delon voltage quadrupler, and 2-stage charge pumped architectures are designed, simulated, fabricated, and evaluated. The design and simulation are conducted using Agilent Genesys at operating frequency of 915 MHz. A dielectric substrate of FR-4 with thickness of 1.6 mm, and surface mount devices (SMD) components are used to fabricate the designed rectifiers. The performance of the fabricated rectifiers is evaluated using a 915 MHz radio frequency (RF) energy source. The maximum measured conversion efficiency of the Delon doubler, Greinacher tripler, Delon quadrupler, and 2-stage charge pumped rectifiers are 78, 75, 73, and 76 % at -5 dBm input power and for load resistances of 5-15 kΩ. The conversion efficiency of the rectifiers decreases significantly with the increase in the input power level. The Delon doubler rectifier provides the highest efficiency at both -5 and 5 dBm input power levels, whereas the Delon quadrupler rectifier gives the lowest efficiency for the same inputs. By considering both efficiency and DC output voltage, the charge pump rectifier outperforms the other three rectifiers. Accordingly, the optimised 2-stage charge pumped rectifier is used together with an antenna to harvest energy in our DBS device.

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“…They used patch antennas to receive the signal and rectenna was used to rectify the power. They found that the addition of a low pass filter helped concentrate the power received and improved the overall efficiency of the system [12]. The RF-DC conversion efficiency η is represented as follows:…”

Section: Rectenna Concept and Brief Literature Review For Electromagnmentioning

confidence: 99%