Wireless Power Transmission with EBG Metamaterial скачать в хорошем качестве

Wireless Power Transmission with EBG Metamaterial

Full overview of this technology here: http://muonray.blogspot.ie/2014/10/wi... Using an inkjet printer compatible, conductive graphite ink I developed, I have been able to produce prototype metamaterial circuits for use as antennas for wireless energy transmission. Metamaterials can provide a means to enhance the performance and size of wireless components — for example, by making antennas multi-functional, and reducing the size and cost of front-end filtering. As the antennas become smaller however, the quality of classical metamaterials decreases as the amount of isolation decreases, as the resonators are closer together hence creating cross talk between them which causes sections of the metamaterial to damp out the signal. An Electromagnetic Band Gap (EBG) metamaterial structure can be used to increase the isolation between antennas close to each other. The decoupling effect is not only a function of frequency but also polarization and coupling-plane configuration. In short, an EBG metamaterial affects photons in the same way semiconductor materials affect electrons as it, in effect, allows one to gate electromagnetic waves, such as Radio or Microwaves, propagating through the metamaterial. This research is derived by finding means to create circuits using electromagnetic waves instead of electric currents for use in sensor and integrated circuit technology. EBG metamaterials can be based on passive metamaterial split ring resonators with diodes that exhibit a variable capacitance, i.e. the varicap effect, which when inserted into the split ring resonator to give a variable frequency response. Experimentation with the varicap effect need not remain in the realms of advanced electronics or solid state physics labs. All semiconductor junction devices exhibit the effect, some to a surprising degree. Although many common devices exhibit the effect, they are not designed for that purpose so the effect can vary widely between one batch of a certain device and another. Varicap diodes can be typically used in EBG Metamaterials, creating a capacitance are on the order of 16 picoFarads which creates the bandgap. In practice, the Philips BA 102 varicap and a common rectifier diode, the 1N5408, exhibit similar changes in junction capacitance. So there can be many inclusions of cheap electronics in metamaterials, allowing them to be mass produced easily and cheaply. However, for quality testing of split ring resonators in prototype metamaterials, high quality varicap diodes are recommended for initial testing, after a success it is then reasonable to see if cheaper diode types can be used for manufacturing the metamaterial type en mass. While headlining applications — such as cloaking and invisibility — gain much public fanfare, there are many practical but often overlooked challenges in applying metamaterials to real-world applications. Due to the resonant nature of most metamaterial solutions, the approaches for achieving broadband effective properties are challenging. The principle of loss, or dissipation of the electromagnetic energy through its interaction with the material, presents a significant barrier for applications requiring transparency or high-efficiency transmission. Additionally, the creation of manufacturable bulk materials, beyond a few stacked surfaces, can be a significant challenge for materials and manufacturing engineers. The difficulty of this process is amplified as metamaterial features are pushed down into the nano-scale required for optical frequencies. Ultimately, the success of metamaterials requires an emphasis on the ability to model, design and manufacture them for system applications in order to create a sufficient engineering base for their improvement to work in different regimes of the electromagnetic spectrum, with research into employing them for terahertz and infrared frequencies ongoing until the "holy-grail" of generating visible light metamaterials can be conceived.