radio waveguides

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• Metamaterial antenna — This Z antenna tested at the National Institute of Standards and Technology is smaller than a standard antenna with comparable properties. Its high efficiency is derived from the Z element inside the square that acts as a metamaterial, greatly… …   Wikipedia

• Waveguide — This page is about waveguides in the most general sense. For ordinary metal pipe waveguides, Waveguide (electromagnetism). For optical waveguides, see Waveguide (optics). A section of flexible waveguide with a pressurizable flange …   Wikipedia

• Alternating current — (green curve). The horizontal axis measures time; the vertical, current or voltage. In alternating current (AC, also ac) the movement of electric charge periodically reverses direction. In direct current (DC, also dc), the flow of electric charge …   Wikipedia

• Waveguide (electromagnetism) — In electromagnetics and communications engineering, the term waveguide may refer to any linear structure that guides electromagnetic waves. However, the original and most common meaning is a hollow metal pipe used for this purpose.A dielectric… …   Wikipedia

• Power dividers and directional couplers — A 10 dB 1.7–2.2 GHz directional coupler. From left to right: input, coupled, isolated (terminated with a load), and transmitted port …   Wikipedia

• waveguide — /wayv guyd /, Electronics, Optics. n. a conduit, as a metal tube, coaxial cable, or strand of glass fibers, used as a conductor or directional transmitter for various kinds of electromagnetic waves. Cf. optical fiber. [1930 35; WAVE + GUIDE] * *… …   Universalium

• Transmission line — This article is about the radio frequency transmission line. For the power transmission line, see electric power transmission. In communications and electronic engineering, a transmission line is a specialized cable designed to carry alternating… …   Wikipedia

• Optical fiber — A bundle of optical fibers A TOSLINK fiber optic audio c …   Wikipedia

• Skin effect — Skin depth redirects here. For the depth (layers) of biological/organic skin, see skin. Skin effect is the tendency of an alternating electric current (AC) to distribute itself within a conductor with the current density being largest near the… …   Wikipedia

• Linear particle accelerator — A linear particle accelerator (also called a linac) is an electrical device for the acceleration of subatomic particles. This sort of particle accelerator has many applications, from the generation of X rays in a hospital environment, to an… …   Wikipedia

• Maxwell's equations — For thermodynamic relations, see Maxwell relations. Electromagnetism …   Wikipedia