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  2. Radome - Wikipedia

    en.wikipedia.org/wiki/Radome

    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]

  3. Dielectric - Wikipedia

    en.wikipedia.org/wiki/Dielectric

    In electromagnetism, a dielectric (or dielectric medium) is an electrical insulator that can be polarised by an applied electric field.When a dielectric material is placed in an electric field, electric charges do not flow through the material as they do in an electrical conductor, because they have no loosely bound, or free, electrons that may drift through the material, but instead they ...

  4. Frequency selective surface - Wikipedia

    en.wikipedia.org/wiki/Frequency_selective_surface

    In dielectric problems, there are twice as many unknowns - J & M - and also twice as many equations to enforce - continuity of tangential E & H - at the dielectric interfaces. [ 3 ] For PEC structures, the electric field E is related to the vector magnetic potential A via the well-known relation:

  5. Category:Dielectrics - Wikipedia

    en.wikipedia.org/wiki/Category:Dielectrics

    Types of dielectric materials that inhibit the transmission of electric current. Subcategories. ... Dielectric gases (6 P) Glass (12 C, 35 P) H. High-κ dielectrics ...

  6. Artificial dielectrics - Wikipedia

    en.wikipedia.org/wiki/Artificial_dielectrics

    Natural dielectrics, or natural materials, are a model for artificial dielectrics. When an electromagnetic field is applied to a natural dielectric, local responses and scattering occur on the atomic or molecular level. The macroscopic response of the material is then described as electric permittivity and magnetic permeability. However, for ...

  7. Dielectric resonator antenna - Wikipedia

    en.wikipedia.org/wiki/Dielectric_Resonator_Antenna

    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.

  8. Relative permittivity - Wikipedia

    en.wikipedia.org/wiki/Relative_permittivity

    A dielectric is an insulating material, and the dielectric constant of an insulator measures the ability of the insulator to store electric energy in an electrical field. Permittivity is a material's property that affects the Coulomb force between two point charges in the material. Relative permittivity is the factor by which the electric field ...

  9. Liquid dielectric - Wikipedia

    en.wikipedia.org/wiki/Liquid_dielectric

    A liquid dielectric is a dielectric material in liquid state. Its main purpose is to prevent or rapidly quench electric discharges.Dielectric liquids are used as electrical insulators in high voltage applications, e.g. transformers, capacitors, high voltage cables, and switchgear (namely high voltage switchgear).