- directional null
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направленный провал
Англо-русский словарь технических терминов. 2005.
directional null
Смотреть что такое "directional null" в других словарях:
Null (physics) — In physics a null is a point in a field where the field quantity is zero as the result of two or more opposing quantities completely cancelling each other. The field may be scalar, vector or tensor in nature. Common situations where nulls arise… … Wikipedia
Null (radio) — Yagi Uda antenna polar pattern showing pattern of alternating lobes and nulls In radio electronics, a null is an area or vector in an antenna s radiation pattern where the signal cancels out almost entirely. This can be an advantage, as nulls in… … 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
Average Directional Movement Index — Der Average Directional Movement Index ADX ist ein Indikator der technischen Analyse und dient der Trendstärkebestimmung eines Kurses. Er wurde von Welles Wilder 1978 entwickelt und in seinem Buch „New Concepts in Technical Trading Systems“… … Deutsch Wikipedia
Euclidean vector — This article is about the vectors mainly used in physics and engineering to represent directed quantities. For mathematical vectors in general, see Vector (mathematics and physics). For other uses, see vector. Illustration of a vector … Wikipedia
Alternative hypothesis — Main article: Statistical hypothesis testing In statistical hypothesis testing, the alternative hypothesis (or maintained hypothesis or research hypothesis) and the null hypothesis are the two rival hypotheses which are compared by a statistical… … Wikipedia
Direction finding — (DF) refers to the establishment of the direction from which a received signal was transmitted. This can refer to radio or other forms of wireless communication. By combining the direction information from two or more suitably spaced receivers… … Wikipedia
Antenna (radio) — Whip antenna on car … Wikipedia
Radio direction finder — Civil Air Patrol members practice using a handheld radio direction finder to locate an emergency locator transmitter … Wikipedia
Loop antenna — A shortwave loop antenna A loop antenna is a radio antenna consisting of a loop (or loops) of wire, tubing, or other electrical conductor with its ends connected to a balanced transmission line. Within this physical description there are two very … Wikipedia
Amateur radio direction finding — Sport imagesize = 250px caption = A German competitor on a two meter ARDF course. union = International Amateur Radio Union nickname = first = 1950s, in northern and eastern Europe registered = clubs = contact = Non contact team = Individual… … Wikipedia
