English Dictionary

directivity

名詞

可算名詞 不可算名詞 稀用

(physics, electrical engineering) A measure of the performance of an antenna compared to an isotropic antenna; the ratio of the maximum value of radiation intensity to the average radiation intensity.

日本語の意味

指向性。アンテナの性能を等方放射アンテナと比較し、最大放射強度と平均放射強度の比で評価する性能指標。

The antenna's directivity, which measures its performance compared to an isotropic antenna, improved after we redesigned the reflector.

反射器を再設計したことで、アンテナの指向性（等方性アンテナと比較した性能）が向上しました。

意味（1）

(physics, electrical engineering) A measure of the performance of an antenna compared to an isotropic antenna; the ratio of the maximum value of radiation intensity to the average radiation intensity.

意味（2）

(geology) Anisotropy in the propagation of earthquake waves in the direction of rupture.

意味（3）

(rare) Directionality

For higher degrees, the spatial integration tends to produce a cancellation and a rapid loss of visibility, although less rapidly for velocity measurement than for luminosity measurement, on account of the directivity of the velocity vector.

directivities （ plural ）