- ground-wave pattern
- диаграмма направленности антенны для земной (радио)волны
English-Russian electronics dictionary .
ground-wave pattern
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Wave radar — Ocean surface waves can be measured by several radar remote sensing techniques. Several instruments based on a variety of different concepts and techniques are available to the user and these are all often called wave radars. This article (see… … Wikipedia
ground effect — i. The change in the aerodynamic reaction on an aircraft caused by the proximity of the ground. An aircraft, helicopter, or any other flying machine flying very near to the ground experiences an increase in lift. This additional lift or… … Aviation dictionary
pattern — 1. A design; often refers to chest radiographic findings. 2. In dentistry, a form used in making a mold, as for an inlay or partial denture framework. airspace filling p. SYN: alveolar p.. airway p … Medical dictionary
Audience wave — The wave ( British English: Mexican wave ; also stadium wave), is achieved in a packed stadium when successive groups of spectators briefly stand and raise their arms. Each spectator is required to rise at the same time as those straight in front … Wikipedia
Medium wave — Main article: Medium frequency Medium wave (MW) is the part of the medium frequency (MF) radio band used mainly for AM broadcasting. For Europe the MW band ranges from 526.5 kHz to 1606.5 kHz[1] and in North America an extended MW… … Wikipedia
Speckle pattern — A speckle pattern is a random intensity pattern produced by the mutual interference of a set of wavefronts. This phenomenon has been investigated by scientists since the time of Newton, but speckles have come into prominence since the invention… … Wikipedia
Heat wave — A heat wave is a prolonged period of excessively hot weather, which may be accompanied by high humidity. There is no universal definition of a heat wave;cite journal |last=Meehl |first=George A. |coauthors=Tebaldi, Claudia |title=More Intense,… … Wikipedia
T wave alternans — (TWA) is a periodic beat to beat variation in the amplitude or shape of the T wave in an electrocardiogram (ECG or EKG). T wave of ECG TWA was first described in 1908. At that time, only large variations ( macroscopic TWA) could be detected.… … Wikipedia
Diffusing-wave spectroscopy — (DWS) is an optical technique derived from dynamic light scattering (DLS) that studies the dynamics of scattered light in the limit of strong multiple scattering.[1][2] It has been widely used in the past to study colloidal suspensions, emulsions … Wikipedia
Antenna (radio) — Whip antenna on car … Wikipedia
electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… … Universalium
