“directivity”的概念、定义、翻译、参考文献-科学参考

单词	directivity
释义	directivity [dǝ´rek`tiv·ǝd·ǝ] ^{ELECTROMAGNETISM} 1. The value of the directive gain of an antenna in the direction of its maximum value. 2. The ratio of the power measured at the forward-wave sampling terminals of a directional coupler, with only a forward wave present in the transmission line, to the power measured at the same terminals when the direction of the forward wave in the line is reversed; the ratio is usually expressed in decibels. ^ELECTRONICS The ability of a logic circuit to ensure that the input signal is not affected by the output signal.
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