2005/11/03 | 天线增益[Antenna Gain]
类别(Ω〖物理〗) | 评论(0) | 阅读(46) | 发表于 21:50
The gain of an antenna is defined as
(1)

where D is the directivity, e is the antenna efficiency, and is the antenna efficiency.
The directional gain is then defined by
(2)

where p is fraction of signal with polarization of antenna, is the aperture efficiency, and
(3)

For a thermal (i.e., unpolarized) source, .
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