scholarly journals A Wideband Rectenna Using High Gain Fractal Planar Monopole Antenna Array for RF Energy Scavenging

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Mohammad M. Fakharian
Keyword(s):  
Antenna Array ◽  
Conversion Efficiency ◽  
Power Level ◽  
Impedance Matching ◽  
High Gain ◽  
Input Power ◽  
Monopole Antenna ◽  
Energy Scavenging ◽  
Wireless Power ◽  
Circuit Performance

This paper introduces a wideband rectenna that can scavenge ambient wireless power to a range of frequency band from 0.91 GHz to 2.55 GHz efficiently. The proposed rectenna is based on a wideband 2 × 2 fractal monopole antenna array with omnidirectional radiation patterns and high gains of 5 to 8.3 dBi at the desired bands. An improved two-branch impedance matching technique is presented which is designed to enhance the rectifier circuit performance with a relatively low input power ranging from −25 dBm to 10 dBm. Also, a full-wave wideband rectifier that can suitably improve the RF-to-DC power conversion efficiency is designed for the rectenna. A peak efficiency of 76%, 71%, 61%, and 62% is obtained at 950, 1850, 2100, and 2450 MHz, respectively. Measurement results show that a conversion efficiency of 68% has been achieved over an optimal 4.7 kΩ resistor when the simultaneous four-band input power level is −10 dBm. Moreover, an output DC voltage of around 243 mV with voltage varying within 160–250 mV can be achieved by gathering the low ambient wireless power inside laboratory. This study proves that the proposed rectenna can be applied to a range of many low-power electronic applications.

scholarly journals A Novel High Gain Monopole Antenna Array for 60 GHz Millimeter-Wave Communications

2020 ◽  
Vol 10 (13) ◽  
pp. 4546
Author(s):  
Tarek S. Mneesy ◽  
Radwa K. Hamad ◽  
Amira I. Zaki ◽  
Wael A. E. Ali
Keyword(s):  
Antenna Array ◽  
Communication Systems ◽  
Ground Plane ◽  
High Gain ◽  
Monopole Antenna ◽  
Impedance Bandwidth ◽  
Single Element ◽  
60 Ghz ◽  
Defected Ground Structure ◽  
Element Array

This paper presented the design and implementation of a 60 GHz single element monopole antenna as well as a two-element array made of two 60 GHz monopole antennas. The proposed antenna array was used for 5G applications with radiation characteristics that conformed to the requirements of wireless communication systems. The proposed single element was designed and optimized to work at 60 GHz with a bandwidth of 6.6 GHz (57.2–63.8 GHz) and a maximum gain of 11.6 dB. The design was optimized by double T-shaped structures that were added in the rectangular slots, as well as two external stubs in order to achieve a highly directed radiation pattern. Moreover, ring and circular slots were made in the partial ground plane at an optimized distance as a defected ground structure (DGS) to improve the impedance bandwidth in the desired band. The two-element array was fed by a feed network, thus improving both the impedance bandwidth and gain. The single element and array were fabricated, and the measured and simulated results mimicked each other in both return loss and antenna gain.

Low loss, fully-printed, ferroelectric varactors for high-power impedance matching at low ISM band frequency

2019 ◽  
Vol 11 (7) ◽  
pp. 658-665
Author(s):  
Daniel Kienemund ◽  
Nicole Bohn ◽  
Thomas Fink ◽  
Mike Abrecht ◽  
Walter Bigler ◽  
...  
Keyword(s):  
High Power ◽  
Power Level ◽  
Impedance Matching ◽  
Input Power ◽  
Low Loss ◽  
Band Frequency ◽  
Power Matching ◽  
Metal Insulator Metal ◽  
Ferroelectric Varactors ◽  
Suppression Technique

AbstractLow loss, ferroelectric, fully-printed varactors for high-power matching applications are presented. Piezoelectric-induced acoustic resonances reduce the power handling capabilities of these varactors by lowering the Q-factor at the operational frequency of 13.56 MHz. Here, a quality factor of maximum 142 is achieved with an interference-based acoustic suppression approach utilizing double metal–insulator–metal structures. The varactors show a tunability of maximum 34% at 300 W of input power. At a power level of 1 kW, the acoustic suppression technique greatly reduces the dissipated power by 62% from 37 W of a previous design to 14.2 W. At this power level, the varactors remain tunable with maximum 18.2% and 200 V of biasing voltage.

High Gain Wireless Power Transfer Using 60GHz Antenna Array

2019 ◽  
Author(s):  
Hugo Flores-Garcia ◽  
Deon Lucien ◽  
Tyler McPherson ◽  
Sungkyun Lim
Keyword(s):  
Antenna Array ◽  
Wireless Power Transfer ◽  
High Gain ◽  
Power Transfer ◽  
Wireless Power

scholarly journals Multiband Ambient RF Energy Harvester with High Gain Wideband Circularly Polarized Antenna toward Self-Powered Wireless Sensors

Sensors ◽  
2021 ◽  
Vol 21 (21) ◽  
pp. 7411
Author(s):  
Hong Quang Nguyen ◽  
Minh Thuy Le
Keyword(s):  
Conversion Efficiency ◽  
Energy Harvester ◽  
Axial Ratio ◽  
High Gain ◽  
Input Power ◽  
Phase Shifters ◽  
Circularly Polarized ◽  
Power Dividers ◽  
Sustainable Operation ◽  
Self Powered

In this work toward a sustainable operation of a self-powered wireless sensor, we investigated a multiband Wi-Fi/3G/4G/5G energy harvester based on a novel wideband circularly polarized antenna, a quadplexer, and rectifiers at four corresponding bands. This proposed antenna consisted of four sequentially rotated dual-dipoles, fed by a hybrid feeding network with equal amplitude and an incremental 90° phase delay. The feeding network was composed of three Wilkinson power dividers and Schiffman phase shifters. Based on the sequential rotation method, the antenna obtained a −10 dB reflection coefficient bandwidth of 71.2% from 1.4 GHz to 2.95 GHz and a 3 dB axial ratio (AR) bandwidth of 63.6%, from 1.5 GHz to 2.9 GHz. In addition, this antenna gain was higher than 6 dBi in a wide bandwidth from 1.65 GHz to 2.8 GHz, whereas the peak gain was 9.9 dBi. The quad-band rectifier yielded the maximum AC–DC conversion efficiency of 1.8 GHz and was 60% at −1 dBm input power, 2.1 GHz was 55% at 0 dBm, 2.45 GHz was 55% at −1 dBm, and 2.6 GHz was 54% at 0.5 dBm, respectively. The maximum RF–DC conversion efficiency using the wideband circularly polarized antenna was 27%, 26%, 25.5%, and 27.5% at −6 dBm of input power, respectively.

Design and Analysis of a Single-Band Printed Rectenna Circuit at WiFi Frequency for Microwave Power Transmission

2019 ◽  
Vol 15 (2) ◽  
pp. 33-39
Author(s):  
Ahmad Salih ◽  
Abdulkareem Abdullah
Keyword(s):  
Power Transmission ◽  
Impedance Matching ◽  
Input Power ◽  
Single Band ◽  
Wireless Power ◽  
Question Mark ◽  
Software Packages ◽  
Maximum Conversion ◽  
Maximum Conversion Efficiency ◽  
Simulation Results

In this paper, a single-band printed rectenna of size (45×36) mm2 has been designed and analyzed to work at WiFi frequency of 2.4 GHz for wireless power transmission. The antenna part of this rectenna has the shape of question mark patch along with an inverted L-shape resonator and printed on FR4 substrate. The rectifier part of this rectenna is also printed on FR4 substrate and consisted of impedance matching network, AC-to-DC conversion circuit and a DC filter. The design and simulation results of this rectenna have been done with the help of CST 2018 and ADS 2017 software packages. The maximum conversion efficiency obtained by this rectenna is found as 57.141% at an input power of 2 dBm and a load of 900 Ω.

scholarly journals Optimized rectenna design

2015 ◽  
Vol 2 (1) ◽  
pp. 44-50 ◽  
Author(s):  
Hubregt J. Visser ◽  
Shady Keyrouz ◽  
A. B. Smolders
Keyword(s):  
Power Level ◽  
Impedance Matching ◽  
Power Conversion ◽  
Input Power ◽  
Matching Network ◽  
Lumped Element ◽  
Dc Power ◽  
Highly Sensitive ◽  
Resistive Loading ◽  
Rectenna Design

Design steps are outlined for maximizing the RF-to-dc power conversion efficiency (PCE) of a rectenna. It turns out that at a frequency of 868 MHz, a high-ohmic loaded rectifier will lead to a highly sensitive and power conversion efficient rectenna. It is demonstrated that a rectenna thus designed, using a 50 Ω antenna and lumped element matching network gives a superior PCE compared with state of the art also for lower resistive loading. By omitting the matching network and directly, conjugate impedance matching the antenna to the rectifier, the PCE may be further increased and the rectenna size reduced as it is demonstrated with a rectenna prototype measuring only 0.028 squared wavelengths at 868 MHz and demonstrating a PCE of 55% for a −10 dBm RF input power level.

scholarly journals RF Energy Scavenging With a Wide-Range Input Power Level

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 173450-173462
Author(s):  
Kyrillos K. Selim ◽  
Shaochuan Wu ◽  
Demyana A. Saleeb
Keyword(s):  
Power Level ◽  
Input Power ◽  
Energy Scavenging ◽  
Wide Range ◽  
Rf Energy

scholarly journals Design and Analysis of a 35 GHz Rectenna System for Wireless Power Transfer to an Unmanned Air Vehicle

Energies ◽  
2022 ◽  
Vol 15 (1) ◽  
pp. 320
Author(s):  
Muttahid Ull Hoque ◽  
Deepak Kumar ◽  
Yves Audet ◽  
Yvon Savaria
Keyword(s):  
Antenna Array ◽  
Microwave Power ◽  
Patch Antenna ◽  
High Efficiency ◽  
Low Cost ◽  
High Gain ◽  
Input Power ◽  
Design System ◽  
Power Transfer ◽  
Critical System

In this article, the concept of a 22-kW microwave-powered unmanned aerial vehicle is presented, where the critical system architecture is analyzed and modeled for wirelessly transferring microwave power to the flying UAVs. The microwave system transmitting power at a 35 GHz frequency was found to be suitable for low-cost and compact architectures. The size of the transmitting and receiving systems are optimized to 108 m2 and 90 m2, respectively. A linearly polarized 4 × 2 rectangular microstrip patch antenna array has been designed and simulated to obtain a high gain, high directivity, and high efficiency in order to satisfy the power transfer requirement. The numerically simulated gain, directivity, and efficiency of the proposed patch antenna array are 13.4 dBi, 14 dBi, and 85%, respectively. Finally, a rectifying system (rectenna) is optimized using the Agilent advanced design system (ADS) software as a microwave power receiving system. The proposed rectenna has an efficiency profile of more than 80% for an RF input power range of 9 to 18 dBm. Moreover, the RF-to-DC conversion efficiency and DC output voltage of the proposed rectenna is 80% and 3.5 V, respectively, for a 10 dBm input power at 35 GHz with a load of 1500 Ω.

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