(Electrical telecommunication nanoantennas) Placement of proper rectifier in the place of nanoantenna feed gap
Researcher and author: Dr. ( Afshin Rashid)
Note: By placing a suitable rectifier in the place of the nano antenna feeding gap, the desired DC power is produced.
In the Solar Rectenna system, millions of nano antennas are placed next to each other along with a suitable rectifier and each one produces electric energy using sunlight. The conversion of the solar light energy absorbed by the antenna is done by a suitable rectifier. Suitable diodes for this frequency range are 12MIMs. This diode should be able to work at frequencies of more than 30 terahertz. Schottky diode , which is a semiconductor diode with low voltage drop and relatively fast response speed , has the ability to rectify and detect signals with a frequency of up to 5 terahertz. Due to the femtosecond tunneling time and the significant increase in response speed, the MIM diode can be used as an alternative to the Schottky diode. It is used in the infrared and visible frequency range.
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, that is why the nano antenna By collecting these radiations during the night or in bad weather conditions, the solar panels can produce electrical energy. Currently, the diode and antenna structures used in solar arrays are made using the electron sketch method. Although this method Manufacturing is expensive and time-consuming for production in laboratory and research scales , but if these structures are produced in a large volume and with a suitable method , they reduce the cost and speed of the manufacturing 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. With Considering the low receiving power of each independent antenna, it is customary to use antenna arrays in this cell, which also has its own rules and methods .
Conclusion :
By placing a suitable rectifier in the slot of the nano-antenna feed, the desired DC power is produced.
Researcher and author: Dr. ( Afshin Rashid)
Specialized doctorate in nano-microelectronics