Loss evaluation of the 60-GHz small antenna in the package for wireless data-transfer systems

This paper evaluates the loss factors in the 60-GHz small antenna in a package for a mobile terminal of the wireless data-transfer system. The loss evaluation shows the potential of the improvement in each part of the antenna. The transmission losses of the microstrip line (MSL) and the post-wall waveguide have been discussed. The estimated gain has been compared with the measured gain in the 60 GHz band. The loss factors of the small antenna including the reflection loss, dielectric loss, conductor loss both in the microstrip line and in the post-wall waveguide have been evaluated.