Fig. 16 is the picture of the fabricated low SLL array prototype. The measured radiation pattern at 60 GHz is shown in Fig. 17 that is compared to the simulated one. Both measurement and simulation are in good agreement. The gain of the main lobe is measured at 17.7 dBi with a 3 dB beamwidth of 15 degrees on the E-plane. There is a difference of 15.6 dB between the main beam and side lobes observed