kuanfu
Junior Member level 2
Hi,everyone
We usually can see on Paper some antenna the design is High gain and high
directivity.
But I do not understand the antenna Gain and directivity have any to
be different.
I knew these two relational type is G(Gain)=radiation efficiency*D(directivity).
But I did not understand to this formula significance.
The meaning is directivity if high gain can be relatively high?
(The premise is the radiation efficiency must be very good)
gain high that directivity also is relatively high?
If the antenna radiation efficiency not good has the possibility to
have directivity the high gain also high situation?
If radiation efficiency not good that were may let this antenna
directivity change high so can let gain change high?
Because the directivity definition is not said so long as let the
energy radiate such directivity toward some direction to be able to be
high,No matter the radiating capacity many or are few.
Or said so long as the radiation efficiency not good is impossible to
have directivity the high situation?
Asks fellow seniors to help me to illustrate
Thanks.
kuanfu
We usually can see on Paper some antenna the design is High gain and high
directivity.
But I do not understand the antenna Gain and directivity have any to
be different.
I knew these two relational type is G(Gain)=radiation efficiency*D(directivity).
But I did not understand to this formula significance.
The meaning is directivity if high gain can be relatively high?
(The premise is the radiation efficiency must be very good)
gain high that directivity also is relatively high?
If the antenna radiation efficiency not good has the possibility to
have directivity the high gain also high situation?
If radiation efficiency not good that were may let this antenna
directivity change high so can let gain change high?
Because the directivity definition is not said so long as let the
energy radiate such directivity toward some direction to be able to be
high,No matter the radiating capacity many or are few.
Or said so long as the radiation efficiency not good is impossible to
have directivity the high situation?
Asks fellow seniors to help me to illustrate
Thanks.
kuanfu