scholarly journals Power harvesting through flexible rectenna at dual resonant frequency for low power devices

2018 ◽  
Vol 7 (3.3) ◽  
pp. 647 ◽  
Author(s):  
V K. Singh ◽  
Anurag Saxena ◽  
Bharat Bhushan Khare ◽  
Vicky Shakya ◽  
Gyoo Soo Chae ◽  
...  
Keyword(s):  
Return Loss ◽  
Power Transmission ◽  
Electrical Energy ◽  
Wireless Power ◽  
Power Devices ◽  
Resonant Frequencies ◽  
Power Harvesting ◽  
Wearable Antenna ◽  
Textile Antenna ◽  
Epoxy Material

In Wireless power transmission, the transmission of electrical energy can be done without using any conductor or lead. After the simulation of wearable antenna, two resonant frequencies are obtained, i.e. 9.94 GHz and 7.35 GHz. For the designing of antenna, instead of using glass epoxy material, textile material is used having dielectric constant 1.7. The places where it is difficult to transfer the electrical energy, textile antenna is useful in those places. Ambient radio frequency can be converted in DC signal through the rectifier. All the graphs related to rectenna, such as return loss, output voltage and current at load are presented in this paper. Textile antenna for energy harvesting is de-signed in CST software and further rectenna circuit can be designed in Pspice Software. 

scholarly journals Rectenna circuit at 6.13 GHz to operate the sensor devices

2018 ◽  
Vol 7 (3.3) ◽  
pp. 644 ◽  
Author(s):  
Anurag Saxena ◽  
V K. Singh ◽  
Mohini . ◽  
Sonam Bhardwaj ◽  
Gyoo Soo Chae ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Resonant Frequency ◽  
Power Transmission ◽  
Electrical Energy ◽  
Textile Material ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Design Purpose ◽  
Wearable Antenna ◽  
Sensor Devices

There are various types of transmission through wire and wireless but wireless power transmission is the transmission of electrical energy without using any conductor or lead. At resonant frequency, 6.13 GHz wearable antenna is fabricated and tested. For making wearable an-tenna, textile material (substrate) i.e. Jeans is used for the simulation having dielectric constant 1.7. At the places where it is hard to transmit energy, wearable antenna is best suitable for this purpose, but before doing this RF is converted into DC with the help of the rectifier. Vari-ous types of graph in this paper are shown in the comparison between the power and efficiency. For simulating and design purpose of an-tenna CST, software is used. Implementation of antenna with rectifier circuit is known as rectenna and the rectenna circuit can be designed in Pspice software.  

Efficient Rectenna Circuit for Wireless Power Transmission

2020 ◽  
pp. 57-65
Author(s):  
Anurag Saxena ◽  
Paras Raizada ◽  
Lok Prakash Gautam ◽  
Bharat Bhushan Khare
Keyword(s):  
Resonant Frequency ◽  
Power Transmission ◽  
Numerical Data ◽  
Electrical Energy ◽  
Single Band ◽  
Impedance Bandwidth ◽  
Power Transfer ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Power Transfer Efficiency

Wireless power transmission is the transmission of electrical energy without using any conductor or wire. It is useful to transfer electrical energy to those places where it is hard to transmit energy using conventional wires. In this chapter, the authors designed and implemented a wireless power transfer system using the basics of radio frequency energy harvesting. Numerical data are presented for power transfer efficiency of rectenna. From the simulated results, it is clear that the anticipated antenna has single band having resonant frequency 2.1 GHz. The anticipated antenna has impedance bandwidth of 62.29% for single band. The rectenna has maximum efficiency of 60% at 2.1 GHz. The maximum voltage obtained by DC-DC converter is 4V at resonant frequency.

scholarly journals Investigation on Wearable Antenna under Different Bending Conditions for Wireless Body Area Network (WBAN) Applications

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Ismahayati Adam ◽  
Muhammad Ramlee Kamarudin ◽  
Ali H. Rambe ◽  
Norshakila Haris ◽  
Hasliza A. Rahim ◽  
...  
Keyword(s):  
Return Loss ◽  
Coupling Effect ◽  
Ground Plane ◽  
Wireless Body Area Network ◽  
Area Network ◽  
Radiation Characteristics ◽  
Antenna Structure ◽  
Wearable Antenna ◽  
Operating Frequency Range ◽  
Textile Antenna

This paper analysed the effects of bending on the performance of a textile antenna wherein the antenna under test was made of felt substrate for both industrial, scientific, and medical (ISM) band and WBAN applications at 2.45 GHz. Moreover, the conductive material was used for the patch, and the ground plane used a 0.17 mm Shieldit textile. Meanwhile, the antenna structure was in the form of rectangular, with a line patch in between elements to abate the mutual coupling effect. The measured operating frequency range of the antenna spanned from 2.33 GHz to 2.5 GHz with a gain of 4.7 dBi at 2.45 GHz. In this paper, the antenna robustness was examined by bending the structure on different radii and degrees along both X- and Y-axis. Next, the effects on return loss, bandwidth, isolation, and radiation characteristics were analysed. This paper also discovered that the antenna’s performance remained acceptable as it was deformed, and the measured results agreed well with the simulation.

scholarly journals Textile Antenna for Microwave Wireless Power Transmission

2016 ◽  
Vol 85 ◽  
pp. 856-861 ◽  
Author(s):  
Nikhil Kumar Singh ◽  
Vinod Kumar Singh ◽  
Naresh B.
Keyword(s):  
Power Transmission ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Textile Antenna

A wearable textile antenna for wireless power transfer by magnetic resonance

2017 ◽  
Vol 88 (8) ◽  
pp. 913-921 ◽  
Author(s):  
Eunah Heo ◽  
Keun-Yeong Choi ◽  
Jooyong Kim ◽  
Jong-Hu Park ◽  
Hojin Lee
Keyword(s):  
Magnetic Resonance ◽  
Resonance Frequency ◽  
Power Transmission ◽  
Wireless Power Transfer ◽  
Power Transfer ◽  
Wireless Power ◽  
Human Body Model ◽  
Spiral Coil ◽  
Textile Antenna ◽  
Bending Radius

The paper presents a wearable textile antenna embroidered on a fabric for wireless power transfer systems. A planar spiral coil was generated with the conductive thread on a cotton substrate, and was connected to a rectifier circuit fabricated on flexible polyethylene terephthalate film to constitute a bendable receiver by the magnetic resonance. At a resonance frequency of 6.78 MHz, the proposed system could achieve −5.51 dB transfer efficiency and 12.75 mW power transmission at a distance of 15 cm. It was also demonstrated that the resonance frequency and transmitted power of the proposed system could be maintained as the same even when the system was bent conformingly to the surface curvature of the human body model for a bending radius up to 50 mm or larger.

scholarly journals ANALISIS WIRELESS POWER TRANSMISSION SYSTEM DALAM ASPEK REGULASI MENGGUNAKAN METODE BENCHMARK

Kilat ◽  
2018 ◽  
Vol 7 (2) ◽  
pp. 178-189
Author(s):  
Samsurizal Samsurizal
Keyword(s):  
Power Transmission ◽  
New Technology ◽  
Modern Society ◽  
Electrical Energy ◽  
Legal Framework ◽  
Regulatory Function ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Computing Device ◽  
Community Activities

Wireless technology has developed very rapidly both in terms of providing infrastructure and supporting technology that is on the side of the mobile computing device that has been widely used by people. Charging the battery is one of the primary needs of modern society. To support community activities that the higher the level of mobility, power bank is a solution. However, the ability of power banks are still limited in terms of charging. Thus, the wireless charging technology, or better known as the Wireless Power Transmission (WPT). Wireless Power Transmission is a technology that allows electrical energy from the power source to an electrical load is transmitted without any interconnection. Wireless Power Transmission especially useful for devices connected to the cable dangerous. This is new technology but the market has seen demand increase significantly. Various types of applications, that the technology Wireless Power Transmission (WPT) is applied, the expected and the study of the current WPT is underway. Also, ongoing standardization activities in several standardization organizations.as well as the issuance of Wireless Power Transmission Regulations in some countries so expect the harmonization of rules / law in the implementation of Wireless Power Transmission in everyday life, Clarity and certainty of legal framework for the implementation of the regulatory function of the business operations of Wireless Power Transmission.

scholarly journals Textile-Based Coils for Inductive Wireless Power Transmission

2021 ◽  
Vol 11 (9) ◽  
pp. 4309
Author(s):  
Sebastian Micus ◽  
Laura Padani ◽  
Michael Haupt ◽  
Götz T. Gresser
Keyword(s):  
Electromagnetic Induction ◽  
Power Transmission ◽  
Near Field ◽  
Electrical Energy ◽  
Transmission Efficiency ◽  
Maximum Efficiency ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Conductive Materials ◽  
Transmission Quality

We developed and evaluated different textile-based inductive coils for near-field wireless power transmission. The technology uses electromagnetic induction for the contactless transfer of electrical energy. Therefore, we investigated various methods for the attachment of conductive materials on a textile-based material and the production of textile-based coils based on QI standard. Afterwards, the textile-based coils were examined and evaluated due to their specific quality characteristics. This happens by calculating the transmission quality and the maximum efficiency of the system which enables comparison of different coil systems and indicates the transmission efficiency of the systems.

scholarly journals Wireless charging scheme for medium power range application systems

2020 ◽  
Vol 11 (4) ◽  
pp. 1979
Author(s):  
D Karthikeyan ◽  
Sayon Koley ◽  
Mayukh Bagchi ◽  
Avijit Bhattacharya ◽  
K Vijayakumar
Keyword(s):  
Low Power ◽  
Power Transmission ◽  
Lithium Ion ◽  
Electrical Energy ◽  
Research Field ◽  
Wireless Charging ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Highly Active ◽  
Application Systems

Wireless power transmission (WPT) has attracted a wide variety of subjects in various disciplines and has also become a highly active research field due to its capacity to facilitate charging systems. Wireless power transmission will be compulsory to use soon as this technology enables electrical energy to be transmitted from a power source to an electrical load over an air gap without connecting wires. Wireless power transmission has been developed in the low power (1W to 10W) and high power (100W-500W) region. While the low power region development focuses on powering medical transplants and mobile charging, the higher end of the power spectrum is being developed for the electric vehicle (EV) applications. However medium power range (10W to 100W) is relatively unexplored due to lack of proper applications. The commercial WPT scheme is mainly used for the charging of lithium-ion batteries. Sensitive medium power loads like Lithium Polymer (LiPo) batteries do not have a wireless modular charging system. This paper discusses a proposed scheme for wireless charging of medium-range loads. LiPo batteries are used as the targeted charging load. A minimalistic approach has been considered while designing the electronics for efficiency improvement and a compact, modular scheme. The proposed scheme has been developed for drone and robotics applications and the results are validated.

scholarly journals Structural Design of Wearable Miniaturized Textile Antenna

2020 ◽  
Vol 10 (1) ◽  
pp. 12-17
Keyword(s):  
Structural Design ◽  
Return Loss ◽  
Performance Comparison ◽  
Wearable Antenna ◽  
Natural Choice ◽  
Lower Dielectric Constant ◽  
Textile Antenna ◽  
Almost All ◽  
Fabric Material ◽  
Free Status

Worldwide demand of wearable devices is arduous. In field of movable technology ‘hands-free’ status is requirement of persistent communication. With this regards, extensive research has been carried out on wearable technologies. Antennas made of fully fabric material are natural choice. This work presents performance comparison of between classical micro-strip antenna, fabric antenna with metal patch and fully fabric antenna. The fabric antennas show better gain and return loss but are larger in size owing to lower dielectric constant of fabric material. The fabric antennas being conceptually similar to the traditional micro-strip antennas, almost all the micro-strip design techniques could be seamlessly applicable to them. This work further presents an innovative technique of introducing an edge slot in the radiating patch and achieves a reasonable size reduction. This edge slot wearable antenna has been fabricated and the results are compared well with simulated results.

scholarly journals Millimeter Wave Power Transmission for Compact and Large-Area Wearable IoT Devices based on a Higher-Order Mode Wearable Antenna

2021 ◽  
Author(s):  
Mahmoud Wagih ◽  
Geoffrey S. Hilton ◽  
Alex S. Weddell ◽  
Steve Beeby
Keyword(s):  
Millimeter Wave ◽  
Power Transmission ◽  
Path Loss ◽  
Higher Order ◽  
Order Mode ◽  
Wireless Power ◽  
Large Area ◽  
Wearable Antenna ◽  
Iot Devices ◽  
Higher Order Mode

Owing to the shorter wavelength in the millimeter-wave (mmWave) spectrum, miniaturized antennas can receive power with a higher efficiency than UHF bands, promising sustainable mmWave-powered Internet of Things (IoT) devices. Nevertheless, the performance of a mmWave power receiver has not been compared, numerically or experimentally, to its sub-6 GHz counterpart. In this paper, the performance of mmWave-powered receivers is evaluated based on a novel wearable textile-based higher-order mode microstrip antenna, showing the benefits of wireless power transmission (WPT). Firstly, a broadband antenna is proposed maintaining a stable wearable measured bandwidth from 24.9 to 31.1 GHz, over three-fold improvement compared to a conventional patch. The proposed antenna has a measured 8.2 dBi co-polarized gain with the highest thickness-normalized efficiency of a wearable antenna. When evaluated for compact power receivers, the measured path gain shows that WPT at 26 GHz outperforms 2.4 GHz by 11 dB. A rectenna array based on the proposed antenna is then evaluated analytically showing the potential for up to 6.3x higher power reception compared to a UHF patch, based on the proposed antenna's gain and an empirical path-loss model. Both use cases demonstrate that mmWave-powered rectennas are suitable for area-constrained and large-area wearable IoT applications.

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