directional dependence of antenna gain

[prateek3790]

the gain of the antenna has directional dependence ten how do we simply define it by one number.like for half wave dipole the antenna gain is ~2.15db.

do we measure the antenna gain all direction and then simply take the directive one as the antenna gain.

 

[LISA_DALTON]

Good question.
If it is a directional antenna, common sense would dictate that at it's highest gain would indeed be the number used.
Just like you would only use the Gain directly in front of a parabolic, as that is the one (and only) you care about.

 

[LISA_DALTON]

"do we measure the antenna gain all direction and then simply take the directive one as the antenna gain."

I'm pretty sure on directional antennas that is the convention.