Electronic Device with Lightweight Antenna Shielding

An antenna assembly comprising:

• a first substrate;
• a second substrate molded onto the first substrate;
• conductive traces plated onto outer surfaces of the second substrate;
• a flexible printed circuit overlapping the first and second substrates;
• and
• an antenna resonating element on the flexible printed circuit, the first substrate being interposed between the antenna resonating element and the second substrate, and the antenna resonating element being backed by an antenna cavity having edges defined by the antenna resonating element and the conductive traces.

A head-mounted device comprising:

• a conductive chassis;
• a cover mounted to the conductive chassis and having a compound curvature;
• a dielectric carrier having a first substrate formed from a shot of injection- molded plastic and having a second substrate formed from a shot of plateable grade plastic molded onto the first substrate;
• a flexible printed circuit having an antenna resonating element configured to radiate through the cover;
• conductive traces plated onto surfaces of the second substrate opposite the first substrate, the conductive traces defining walls of a cavity-back for the antenna resonating element;
• and
• a biasing member mounted to the dielectric carrier and configured to press the flexible printed circuit against the cover.