DESIGN OF A SECOND-GENERATION KOCH MICROSTRIP DIPOLE RECTENNA (original) (raw)
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Wireless Power Transmission using a desgined Rectenna
This report focuses on designing, measuring and testing of an antenna combined with a rectifying circuit (RECTENNA) which is connected to a LTC 3108 IC DC-to-DC converter for further amplification of transmitted low power density at a microwave frequency of 2.45 GHz. This rectenna is used to harvest and amplify the electric energy from the RF signal transmitter and the surroundings which radiated at ISM band centred in 2.45 GHz, on the thesis methods of simulating the rectenna is analysed with harmonic balance using Agilent Advanced Design Software (ADS) and Multisim. This antenna is later fabricated and measured; the S-parameters are then matched and combined with the LTC 3108 IC. This project is inspired for the practical use of wireless power transmission, low-power applications and RF recycling of the energy consumed in our environment which is wasted and not fully utilized.
Introduction to Wireless Power Transmission
In this paper, we have presented the concept of wireless trans-mission i.e. power transmission without using any type of the electrical conductor and/or wires. We have presented an idea that is discussed here about how electrical energy can be ransmit-ted as microwaves so that to reduce the transmission, allocation and other types of losses. Such technique is known as Microwave Power Transmission (MPT). We have also presented and correlated several aspects with the currently available Power transmission systems to the related history of wireless power transmission systems and also the related developmental changes. The basic design, merits and demerits, applications of Wireless Power Transmission are also dis- cussed.
In this paper, we present the concept of transmitting power without using wires i.e., transmitting power as microwaves from one place to another is in order to reduce the transmission and distribution losses. This concept is known as Microwave Power transmission (MPT). We also discussed the technological developments in Wireless Power Transmission (WPT). The advantages, disadvantages, biological impacts and applications of WPT are also presented.
Wireless power transfer using microwaves at 2.45 GHz ISM band
2009
We have demonstrated wireless power transfer by coupling RF power from a microwave oven magnetron RF source using a dipole at optimum position within the cavity. A 40dBm coupled power is transmitted using a monopole corner reflector antenna having gain of 14.97dBi and a half power beam width of 22 : At the receiving end a patch antenna is placed at variable distances ranging from 0.307 meters (I foot) to 4 meters (13 feet). The measured power received varies from 25dBm to 3dBm which is in close agreement with the theoretically calculated value using Friis transmission equation. The received RF power is simulated on Multisim with a rectifier circuit and it is shown that an efficiency of 5.5% to 0.2% with respect to the transmitted power can be achieved as the distance is varied from 0.307 meters to 4 meters.
Iraqi Journal for Electrical and Electronic Engineering, 2019
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.
Wireless Power Transmission: An Innovative Idea
We cannot imagine the world without electric power. Generally the power is transmitted through wires. This paper describes an original idea to eradicate the hazardous usage of electrical wires which involve lot of confusion in particularly organizing them. Imagine a future in which wireless power transfer is feasible: cell phones, household robots, mp3 players, laptop computers and other portable electronics capable of charging themselves without ever being plugged in, freeing us from that final, ubiquitous power wire. Some of these devices might not even need their bulky batteries to operate. This paper includes the techniques of transmitting power without using wires with an efficiency of about 95% with non-radiative methods. Due to which it does not effect the environment surrounding. These techniques Includes resonating inductive coupling in sustainable moderate range. The coupling consists of an inductor along with a capacitor with its own resonating frequency. In any system of coupled resonators there often exists a so-called "strongly coupled" regime of operation. If one ensures to operate in that regime in a given system, the energy transfer can be very efficient. Another technique includes transfer of power through microwaves using rectennas. This is particularly suitable for long range distances ranging kilometers. With this we can avoid the confusion and danger of having long, hazardous and tangled wiring. This paper as a whole gives an effective, high performance techniques which can efficiently transmit the power to the required area varying in distances . .
A Broadband Rectenna for RF Energy Harvesting from Low Power Levels
In the article, a broadband rectenna is proposed that can harvest energy from low input power levels. A broadband rectenna is designed that can operate between 1.4 GHz and 2.8 GHz with a bandwidth of 1.4 GHz. The proposed rectenna covers two important bands, i.e., GSM 1800 MHz and ISM 2450 MHz. The antenna consists of an antenna and a rectifier. A hexagonal patch antenna is designed with a defective ground structure that can operate from 1.4 GHz to 2.8 GHz. For rectification purposes, the HSMS2850 Schottky diode is used. To achieve good conversion efficiency, a matching circuit (a combination of bandpass and high-pass section) is designed. Maximum simulated conversion efficiencies achieved at 1.8 GHz with a load resistance of 1.3 kΩ are 21%, 36.3%, 51.2%, 63.7%, and 73.4% at power levels of -20 dBm, -15 dBm, -10 dBm, -5 dBm, and 0 dBm, respectively. Simulated conversion efficiency achieved at 2.45 GHz with a load resistance of 2 kΩ is 22.5%, 35%, 46%, 57.2%, and 68.5% at power level...
An experimental evaluation of surrounding RF energy harvesting devices
Microwave …, 2010
In this paper, we present a study of RF energy harvesting devices. The surrounding RF power density was measured. The average of the total radiation power density in broadband (1GHz-3.5GHz) is in the order of -12dBm/m² (63µW/m²). The maximum of the RF density power is measured in 1.8GHz-1.9GHz frequency band, it is around -14dBm/m². Two rectifiers have been designed and simulated at 1.85GHz and 2.45 GHz. The choice of the load to optimize the recovered DC power is studied, and the various antennas were optimized and evaluated. Multiple rectennas have been designed to recover the ambient RF energy. The best performance is obtained with a spiral antenna. The DC energy harvested in out-door ambient, near a mobile phone base station, is presented. The maximum harvested DC power is around 0.1µW. The harvested energy can directly supply some devices such as low power wireless sensors or can be used to trickle charge a super-capacitor or rechargeable micro-battery.