Connectingthetipsofthevectors, wegetthe 3D radiationpatternofthisantenna.
The 3D radiationdiagramprovides a completeinformationaboutthegainofanantennasinceitshowsthegainineverypossibledirectionin 3D space.
Youcannotdobetterthanthat.
Thisiswhyitisgenerallymoreusefulthanthe 2D plotwhichisobtainedfromthe 3D plotanyway.
Insomefields, the 2D diagramcanbeenough, butwhenexaminingthesidelobesofanantennaisvitaltotheparticularapplication, forexample, inthewirelessinternetserviceproviderindustrywheremanyoperatorsleverageunlicensedfrequencybands, thenoisepropagatedthroughthesidelobesdoes a lotofharm.
Insuchcases, itisbettertocheckthe 3D radiationpatternanduseanantennawithaslittlesidelobesaspossible.