Search results
Results from the WOW.Com Content Network
Download as PDF; Printable version; ... Types of dielectric materials that inhibit the transmission of electric current. ... Gate dielectric; Glass; H. Hemingray ...
The material exhibits higher photonic densities of states than Au or Ag. [20] The material is an efficient light absorber. [21] The material was created using epitaxy inside a vacuum chamber with a technique known as magnetron sputtering. The material featured ultra-thin and ultra-smooth layers with sharp interfaces. [21]
Simulating electromagnetics, and electrostatics in complex dielectric and metallic environments. Phased array antenna systems, radar equipment, and photonics. Meep: open source No Yes Yes No Yes manual FDTD, FDFD: Optics and photonics (nanophotonics, photonic crystals, plasmonics, silicon photonics, metamaterials)
Download QR code; Print/export Download as PDF; Printable version; In other projects ... Relative permittivities of some materials at room temperature under 1 kHz;
A radome avoids that by covering the antenna's exposed parts with a sturdy, weatherproof material, typically fiberglass, keeping debris or ice away from the antenna, thus preventing any serious issues. One of the main driving forces behind the development of fiberglass as a structural material was the need during World War II for radomes. [6]
A metallic lens antenna and its inventor Winston E. Kock in 1946. This structure is one of the earliest examples of artificial dielectrics. Artificial dielectrics are fabricated composite materials, often consisting of arrays of conductive shapes or particles in a nonconductive support matrix, designed to have specific electromagnetic properties similar to dielectrics.
The resonant frequency is determined by the overall physical dimensions of the resonator and the dielectric constant of the material. Dielectric resonators function similarly to cavity resonators, hollow metal boxes that are also widely used as resonators at microwave frequencies, except that the radio waves are reflected by the large change in ...
The dimension of a DRA is the order of , where is the free-space wavelength and is the dielectric constant of the resonator material. Thus, by choosing a high value of ε r {\displaystyle \varepsilon _{r}} ( ε r ≈ 10 − 100 {\displaystyle \varepsilon _{r}\approx 10-100} ), the size of the DRA can be significantly reduced.