<P>To RF chamber,2D usually measure H-plane ,and 3D include H-plane & E-plane,use software to combine the them together and generate the total result and 3D radiation pattern.</P><P>There are two type of chambers,near-field and far field,it's depend the dimension of chamber, but not of mobile phone.</P><P>for near-field the measurement data will be calcute and convert to far-field result by softerware.</P>