(electrical - telecommunication nano antennas) system nano antennas ( Solar Rectenna )
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 maintained to a significant extent. This system can also absorb the energy radiated from the earth, that is, the earth's radiation, which is caused by the sun's daily radiation to the earth's surface and occurs in wavelengths of 10 micrometers , i.e. frequencies of about 90 terahertz.
For this reason, the nano-antennas of the solar rectenna system can produce electrical energy by collecting these radiations during the night or in bad weather conditions . Currently, the diode and antenna structures used in solar arrays are made using the electron sketch method. Although this construction method is expensive and time-consuming to produce on a laboratory and research scale, if these structures are produced in a large volume and with an appropriate method , they reduce the cost and speed of the construction process.
It should be noted that Rectenna has been studied in recent years, especially in the issue of power transmission in the microwave band. For example, in theory , for a single frequency of 9.2 GHz, more than 10% efficiency is predicted . Of course, this is the fact that the practical efficiency of making these materials may be slightly different and should be determined in practice. The dipole antenna with linear polarization and 2/λ length, 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 power of pW 5.5 will be obtained. Due to the low receiving power of each independent antenna, it is customary to use antenna arrays in this cell, which has its own rules and methods .Since the use of optical nano-antennas for solar energy collection provides a practical solution with high efficiency compared to other common photovoltaic technologies such as solar panels, it has led to rapid development in the nano and optical materials industry.
Conclusion :
Since nano-antennas have a wide angle absorption capability, even in the case of oblique solar radiation to the surface of the solar panel, their efficiency is maintained to a significant extent. This system can also absorb the energy radiated from the earth, that is, the earth's radiation, which is caused by the sun's daily radiation to the earth's surface and occurs in wavelengths of 10 micrometers , i.e. frequencies of about 90 terahertz.
Researcher and author: Dr. ( Afshin Rashid)
Specialized doctorate in nano-microelectronics