Electronic Device Having Monolithic Phased Antenna Array
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United States of America
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Issued Date -
Apr 10, 2025
app pub date -
Sep 9, 2024
filing date -
Sep 9, 2024
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Abstract
An electronic device may include wireless circuitry having a phased array of antenna resonating elements integrated into a monolithic integrated circuit having a silicon bulk and a substrate grown onto the silicon bulk. The substrate may include interleaved insulator and metallization layers. At least one of the metallization layers may form the antenna resonating elements. The substrate may be free of grounded metal overlapping the antenna resonating elements. The silicon bulk may include cavities. The cavities may extend through the silicon bulk to the substrate. Each cavity may overlap a respective antenna resonating element. The silicon bulk may be mounted to a metal layer that overlaps and encloses each of the cavities. The metal layer may form a radio-frequency reflector for the antenna resonating elements. The cavities and the removal of grounded metal may electromagnetically maximize the volume of the antennas, thereby maximizing efficiency and bandwidth.
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