Directivity

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In electromagnetics, directivity is a property of the radiation pattern produced by an antenna. It is defined as the ratio of the power radiated in a given direction to the average of the power radiated in all directions; the gain pattern is the product of the efficiency of the antenna and the directivity. Although it is a dimensionless quantity, it is often expressed in dBi (decibels isotropic).

[edit] References

  • Coleman, Christopher (2004). "Basic Concepts", An Introduction to Radio Frequency Engineering. Cambridge University Press. ISBN 0-521-83481-3. 


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