Overview of Some Factors Influencing the mm-Wave AiP Solution in Cellular Phones and Some Corresponding Promising Solutions

The paper presents an overview of some factors influencing the millimeter-wave (mm-Wave) antenna-in-package (AiP) solution applied to cellular phones and some corresponding promising solutions. The mentioned factors mainly involve the materials (including conductive and dielectric ones) over mm-Wave AiP arrays, challenging rounded products shapes, volumes shared with non-mm-Wave antennas, the high screen-to-body ratios. The corresponding promising solutions are the mm-Wave antennas in non-mm-Wave antennas (AiA), AiA integrating a package (AiAiP), and antenna-on-display (AoD).