Low-Cost Organic-Substrate Module for Tx–Rx Short-Range WiGig Communications at 60 GHz

This work presents a
${12}\,\,\times \,\,{12}\,\,\times \,\,{0.6}$
mm
³
ball grid array (BGA) module made of low-cost organic substrates which integrates transmitter (Tx) and receiver (Rx) antennas for short-range 60 GHz WiGig communications. The Tx antenna is a single-element linearly polarized aperture-coupled patch (ACP) antenna achieving a worst −12 dB matching with a broadside realized gain above 5 dBi and a total efficiency higher than 50% in the 57–66 GHz band. The Rx antenna is a single-element single-fed circularly polarized ACP antenna. It exhibits a worst −14 dB matching level from
${57~}$
to 66 GHz and a worst −10 dB level from
${47~}$
to 66 GHz (33% relative bandwidth (BW) with respect to 60 GHz). The broadside realized gain is above 5 dBi from
${61~}$
to 67 GHz and the axial ratio stays below 3 dB for a 14% BW with respect to 60 GHz. Variability of the fabrication process is analyzed by means of extensive measurements of several modules. The effect of the integration of the module in the application PCB and the device casing is also studied for realistic use. The obtained results demonstrate suitability of this high-density interconnect BGA packaging technology for mass production of compact low-cost millimeter-wave (mmW) antenna module for WiGig communications.