Electronic Device Antenna Arrays Mounted Against a Dielectric Layer

An electronic device comprising:

• a dielectric layer;
• a dielectric substrate having a surface coupled to the dielectric layer;
• and
• a phased antenna array on the dielectric substrate, wherein the phased antenna array is configured to transmit radio-frequency signals at a frequency between 10 GHz and 300 GHz through the dielectric layer, and the dielectric layer is configured to form a quarter wave impedance transformer for the phased antenna array at the frequency.

An electronic device, comprising:

• a dielectric housing wall;
• a dielectric substrate coupled to the dielectric housing wall;
• and
• a phased antenna array on the dielectric substrate and configured to convey radio-frequency signals at a frequency between 10 GHz and 300 GHz through the dielectric housing wall, the phased antenna array comprising:
• a plurality of antennas, wherein each antenna in the plurality of antennas comprises a conductive trace attached to the dielectric housing wall, and fences of conductive vias, wherein the fences of conductive vias extend through the dielectric substrate and laterally surround the conductive trace in each antenna of the plurality of antennas.