Antenna arrays having conductive shielding buckets

An electronic device comprising:

• a housing having a dielectric wall;
• a conductive cavity mounted in the housing,
• wherein the conductive cavity has a conductive rear wall and conductive sidewalls extending from a periphery of the conductive rear wall to the dielectric wall;
• a phased antenna array mounted to the conductive rear wall and configured to convey radio-frequency signals at a frequency greater than 10 GHz through the dielectric wall;
• and
• a dielectric layer on an interior surface of the dielectric wall, wherein the dielectric wall has a first dielectric constant and the dielectric layer has a second dielectric constant that is less than the first dielectric constant.

An electronic device comprising:

• a dielectric cover layer;
• a conductive bucket having a conductive rear wall and first and second conductive sidewalls extending from opposing sides of the conductive rear wall to the dielectric cover layer;
• and
• a phased antenna array mounted to the conductive rear wall and configured to transmit radio-frequency signals at a frequency between 10 GHz and 300 GHz through the dielectric cover layer, the phased antenna array comprising:
• a substrate mounted to the conductive rear wall,
• a first antenna resonating element on the substrate, wherein the first antenna resonating element has a first side facing the first conductive sidewall and a second side facing the second conductive sidewall,
• a second antenna resonating element on the substrate, wherein the second antenna resonating element has a first side facing the first conductive sidewall and a second side facing the second conductive sidewall,
• a first positive antenna feed terminal coupled to the first side of the first antenna resonating element, and
• a second positive antenna feed terminal coupled to the second side of the second antenna resonating element.