Performance check Rectenna system nano antennasat wavelengths of 10 micrometers
Researcher and author: Dr. Afshin Rashid
Note: Since nano antennas have the ability to absorb a wide angle, even in the case of oblique solar radiation to the surface of the solar panel, their efficiency is up to a significant limit is maintained. This system can also transmit the energy radiated from the earth or the terrestrial radiation that is caused by the sun's daily radiation to the earth's surface and in wavelengths <10 micrometers. /span> , i.e. absorb frequencies around 90 terahertz.
That's why the reason for the nano antennas of the solar rectna system is to collect these radiations duringat night or in bad weather conditions. can generate electrical energy. Currently, the diode and antenna structures used in solar rectenna using They are made by electronic sketching method. Although this construction method is expensive and time-consuming to produce in laboratory and research scales, but if these structures are produced in a large volume and with the appropriate method , they reduce the cost and speed in the manufacturing process. The surface of the nano-antenna is created, and as a result, a voltage is produced at the place of its feeding gap.
A dipole antenna with linear polarization and a length of 2/λ, which has a relative bandwidth of 11%, will be able to collect about 75.2 pW. Therefore, if using an antenna with double polarization, the resulting pW power will be 5.5 will be Due to the low receiving power of any independent antenna, it is customary to use anti-arrays in this cell, which has its own rules and methods. An antenna is a device that can receive electromagnetic waves in space. To receive electromagnetic waves Solar radiation by antenna should be in the order of the size of the incoming wavelength to its surface, so in order to receive solar radiation that includes wavelengths in the infrared, visible and ultraviolet regions, an antenna with nanometer dimensions is needed. Since the use of Optical nanoantennas for solar energy harvesting provide a practical solution with high efficiency compared to other common photovoltaic technologies such as solar panels, leading to rapid development in the nano-industry and optical materials. It has been.
When the solar electromagnetic wave hits the surface of the nanoantenna, a time-varying current is created on the surface of the nanoantenna, and as a result, a voltage is produced at the place of its feeding gap. Hence, by placing a suitable rectifying antenna in the place The power gap of the nano antenna produces the desired DC power. In the solar rectenna system, millions of nano antennas are placed next to each other with a suitable rectifier, and each one of them produces electrical energy using sunlight. Conversion The light energy of the sun, which is absorbed by the antenna, is made by a suitable rectifier. Suitable diodes for this frequency range are 12 MIMs
Since nano antennas have the ability to absorb a wide angle, even in in the case of oblique solar radiation to the surface of the solar panel, their efficiency is up to A significant limit is maintained. This system can also transmit the energy radiated from the earth or the terrestrial radiation that is caused by the daily radiation of the sun to the surface of the earth and in the wavelengths of 10 micrometer, i.e. absorb frequencies around 90 terahertz, therefore the reason for the nanoantennas of the solar system by collecting these radiations in >.At night or in bad weather conditions, they can also produce electricity
Conclusion :
Combining optical antennas next to a suitable rectifier system, which is called Rectenna for short. And it is used in nano communication and power transmission in microwave band. And it is also used in the production of nano electric energy.
Researcher and author: Dr. Afshin Rashid
Specialized doctorate in nano-microelectronics