partial directivity

partial directivity: парциальный коэффициент направленного действия (антенны для данной поляризации)

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Directivity — Diagram showing directivity In electromagnetics, directivity is a figure of merit for an antenna. It measures the power density the antenna radiates in the direction of its strongest emission, versus the power density radiated by an ideal… … Wikipedia
Antenna gain — is defined as the ratio of the radiation intensity of an antenna in a given direction, to the intensity of the same antenna as it radiates in all directions (isotropically). Since the radiation intensity of an isotropically radiated power is… … Wikipedia
Sound from ultrasound — Contents 1 Parametric array 2 Applications 2.1 Commercial advertising … Wikipedia

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