Investigation of the use of amorphous nanocrystalline ribbons as EMI shielding and microstrip patch antenna

Electromagnetic Interference (EMI) is the magnetic interference created by electronic devices on each other. This interference affects the functioning of the devices. It is undesirable for the devices operating within a system to be affected by this interference. EMI shielding methods are used to prevent unwanted interaction between devices. These methods can take various forms such as gasketing and meshing. From the perspective of flexible antennas, antennas that aim to communicate through high-speed communication have been forced to undergo dimensional reductions. As the antenna shrinks in size, the devices that are reduced in size have faced design limitations. Therefore, there is a need for components that can adapt to the design requirements or changes of a system. This need for the antenna, which is fundamental to the communication of a system, is met by flexible antennas. Flexible antennas, which require high-speed communication, have emerged in order to adapt to the mechanical design constraints of shrinking devices. For this purpose, Co and Fe-based strips were produced using predetermined production methods. For EMI shielding, Fe-based strips were adhered to an insulating plate in single and double layers. Subsequently, the EMI shielding effectiveness of the produced plates was examined. As a result of the examination, it was determined that the shielding effectiveness (SE) was about 17 dB at around 10 GHz. A patch antenna, intended to be used in the ISM frequency band in flexible antenna applications, was designed in the CST program. Two types of antennas were produced using flexible amorphous nanocrystalline strips and flexible DiClad880 printed circuit board for the patch part, with Cu and amorphous strips. In order to serve as a reference for the production of flexible antennas, the S11 values of the Cu antenna and the Co-based antenna were compared. It was observed that the Cu antenna had a resonance frequency of 2.4 GHz. The resonant frequency of the amorphous nanocrystalline antenna was determined to be 7 GHz, with an S11 value of -30 dB.