waveguide-to-coaxial
61Relative static permittivity — The relative static permittivity (or static relative permittivity) of a material under given conditions is a measure of the extent to which it concentrates electrostatic lines of flux. It is the ratio of the amount of stored electrical energy… …
62Radio astronomy — is a subfield of astronomy that studies celestial objects at radio frequencies. The field originated from the discovery that many astronomical objects emit radiation in the radio wavelengths as well as optical ones. The great advances in radio… …
63Very Long Baseline Interferometry — (VLBI) is a type of astronomical interferometry used in radio astronomy. It allows observations of an object that are made simultaneously by many telescopes to be combined, emulating a telescope with a size equal to the maximum separation between …
64Input impedance — The input impedance, load impedance, or external impedance of a circuit or electronic device is the Thévenin equivalent impedance looking into its input.In audio systemsGenerally in audio and hi fi, the input impedance of components is several… …
65Goubou line — A Goubau line, Goubou line, or G line for short, is a single wire transmission line intended for use at UHF and microwave wavelengths. DescriptionThe Goubau line itself consists of a single conductor coated with dielectric material. Coupling to… …
66Sulfur lamp — The sulfur lamp (also sulphur lamp) is a highly efficient full spectrum electrodeless lighting system whose light is generated by sulfur plasma that has been excited by microwave radiation. The technology was developed in the early 1990s, but,… …
67Lecher lines — are a form of parallel conductor that can be used at UHF for creating resonant circuits. They are used at frequencies between HF/VHF where lumped components are used, and UHF/SHF where resonant cavities are more practical. Ernst Lecher of Vienna …
68List of World War II British naval radar — This page is a List of World War II British naval radar.NomenclatureThese sets were initially numbered as wireless telegraph (w/t) sets, but a distinguishing prefix of 2 was soon added. Metric sets were numbered in the 28x and 29x series. When… …
69Passive repeater — A passive radio link deflection, or passive repeater is a plant for the implementation of a microwave link, in which because of an obstacle in the signal path no direct line of sight microwave link is possible. It has the advantage over the… …
70Interference (wave propagation) — Two point interference in a ripple tank. In physics, interference is the phenomenon in which two waves superpose each other to form a resultant wave of greater or lower amplitude. Interference usually refers to the interaction of waves that are… …
