Dual-Sided Radar Systems and Methods of Formation Thereof

A method of operating a radar system, the method comprising:

• transmitting, by transmitter front-end circuitry attached to a substrate, a transmitted radio frequency (RF) signal in a first direction away from a first surface of the substrate and in a second direction away from a second surface of the substrate, the first direction being opposite the first direction;
• receiving, by a first receive antenna disposed at the first surface of the substrate, a first reflected RF signal generated by the transmitted RF signal, the first reflected RF signal propagating in the second direction;
• and
• receiving, by a second receive antenna disposed at the second surface of the substrate, a second reflected RF signal generated by the transmitted RF signal, the second reflected RF signal propagating in the first direction.

A method of forming a radar system, the method comprising:

• forming a first receive antenna and a first ground plane region by patterning a first conductive layer on a first surface of a first laminate layer of a radar package;
• forming a transmit antenna and a second ground plane region by patterning a second conductive layer on a second surface of the first laminate layer, the second surface being opposite the first surface;
• forming a second laminate layer of the radar package over the second conductive layer;
• forming a third conductive layer over the second laminate layer;
• forming a second receive antenna by patterning the third conductive layer;
• and
• attaching a radio frequency integrated circuit (RFIC) chip to the radar package, the RFIC being coupled to the transmit antenna, the first receive antenna, and the second receive antenna.