Antenna measurement graph?

Dear all,

I see some antenna design and measurement result now. However, I don't know how to see the graph shown, such as H-plane, E-plane, and angle. Actually, I don't know what is it definition and how do I see this graph. Could anyone introduce some basic introduction book or homepage of this things? I need to get this basic knowledge.

thanks

wccheng

E-plane : the plane containing the electric field vector and the direction of maximum radiation

H-plane : the plane containing the magnetic field vectorand the direction of
maximum radiation