parasitic array
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Planar array — In telecommunications and radar, a planar array is an antenna in which all of the elements, both active and parasitic, are in one plane. [A planar array provides a large aperture and may be used for directional beam control by varying the… … Wikipedia
Reflective array antenna — In telecommunication, a reflective array antenna is an antenna, such as a billboard antenna, in which the driven elements are situated at a predetermined distance from a surface designed to reflect the signal in a desired direction. Note:… … Wikipedia
Moxon antenna — The Moxon Antenna is a simple two element parasitic array antenna that is popular with Amateur radio enthusiasts for its simplicity of construction. The design is rectangular, with roughly half the rectangle being the driven element and the other … Wikipedia
protozoan — /proh teuh zoh euhn/, n., pl. protozoans, (esp. collectively) protozoa / zoh euh/, adj. Biol. n. 1. any of a diverse group of eukaryotes, of the kingdom Protista, that are primarily unicellular, existing singly or aggregating into colonies, are… … Universalium
Life Sciences — ▪ 2009 Introduction Zoology In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… … Universalium
Antenna (radio) — Whip antenna on car … Wikipedia
protist — protistan /proh tis teuhn/, adj., n. protistic, adj. /proh tist/, n. any of various one celled organisms, classified in the kingdom Protista, that are either free living or aggregated into simple colonies and that have diverse reproductive and… … Universalium
Yagi antenna — A Yagi Uda Antenna, commonly known simply as a Yagi antenna or Yagi, is a directional antenna system [ [http://what is what.com/what is/Yagi Uda antenna.html What is a Yagi Uda antenna? An explanation of the familiar Yagi Uda antenna from a non… … Wikipedia
community ecology — Introduction study of the organization and functioning of communities (community), which are assemblages of interacting populations of the species living within a particular area or habitat. As populations of species interact with one … Universalium
Driven element — Active element redirects here. For the devices used in electronic circuits, see active component. A Yagi antenna with one driven element (A) called a folded dipole, and 5 parasitic elements (B and C). A feed line leading to the receiver (not… … Wikipedia
plant — plantable, adj. plantless, adj. plantlike, adj. /plant, plahnt/, n. 1. any member of the kingdom Plantae, comprising multicellular organisms that typically produce their own food from inorganic matter by the process of photosynthesis and that… … Universalium
