“Yagi antenna”的概念、定义、翻译、参考文献-科学参考

Yagi antenna

Astronomy

A directional aerial consisting of a dipole and a number of parallel rods arranged perpendicular to the line of sight. The rods in front of the dipole are termed directors, while the one behind is the reflector. The design is commonly used in television aerials, but in radio astronomy Yagi antennas are used as elements in interferometers. The design is named after the Japanese electrical engineer Hidetsugu Yagi (1886–1976).

Electronics and Electrical Engineering

A sharply directional antenna array from which most antennas used for television have been developed. The active part of the Yagi consists of one or two dipoles together with a parallel reflector antenna and a set of parallel directors (see directional antenna). The directors are relatively closely spaced, being from 0.15 to 0.25 of a wavelength apart. When the antenna is used for transmission, the directors absorb energy from the back lobe of the dipole antenna pattern and rereflect it in the forward direction; the major lobe is thus reinforced at the expense of the back lobe. When used for reception the inverse process occurs causing the signal to be focused on the dipole.

单词	Yagi antenna
释义	Yagi antenna Astronomy A directional aerial consisting of a dipole and a number of parallel rods arranged perpendicular to the line of sight. The rods in front of the dipole are termed directors, while the one behind is the reflector. The design is commonly used in television aerials, but in radio astronomy Yagi antennas are used as elements in interferometers. The design is named after the Japanese electrical engineer Hidetsugu Yagi (1886–1976). Electronics and Electrical Engineering A sharply directional antenna array from which most antennas used for television have been developed. The active part of the Yagi consists of one or two dipoles together with a parallel reflector antenna and a set of parallel directors (see directional antenna). The directors are relatively closely spaced, being from 0.15 to 0.25 of a wavelength apart. When the antenna is used for transmission, the directors absorb energy from the back lobe of the dipole antenna pattern and rereflect it in the forward direction; the major lobe is thus reinforced at the expense of the back lobe. When used for reception the inverse process occurs causing the signal to be focused on the dipole.
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