High gain quasi-Yagi planar antenna evaluation in platform material environment for 60 GHz wireless applications

This paper presents the effect of platform materials on antennas designed for mobile platform integration at 60 GHz. A four-element quasi-Yagi antenna array with small size is developed on liquid crystal polymer (LCP) material demonstrating 11.5 dBi peak gain in free space. An experimental study on the placement of the fabricated quasi-Yagi planar antenna array on laptop chassis material environments is performed in this work. The radiation characteristics of the antenna under test (AUT) are measured for different AUT positions in the laptop chassis material environment. Depending on the proximity of the platform material and AUT location, nulls may appear in the radiation patterns, the peak gain direction of the AUT shifts from the free space case by +30deg, and the peak gain level decreases by about 2.5 dB in the worst case.