Compact, hybrid, low-cost high-resolution dual-mode phased array antenna

A method of operating an antenna apparatus, comprising:

• providing a plurality of receive antenna elements and a transmit antenna array comprising a plurality of transmit antenna elements, wherein the transmit antenna array is located centrally in a phased array aperture that includes the transmit array antenna and the plurality of receive antenna elements;
• and
• operating the phased array aperture with a hybrid dual mode comprising a radar mode and an active beaming steering mode, wherein the phased array aperture includes an isolation area that isolates the transmit antenna array from the plurality of receive antenna elements in the phased array aperture.

An antenna apparatus, comprising:

• a plurality of receive antenna elements and a transmit antenna array comprising a plurality of transmit antenna elements, wherein the transmit antenna array is located centrally in a phased array aperture that includes the transmit array antenna and the plurality of receive antenna elements;
• and
• an isolation area that isolates the transmit antenna array from the plurality of receive antenna elements in the phased array aperture, wherein the phased array aperture operates with a hybrid dual mode comprising a radar mode and an active beaming steering mode, wherein the phased array aperture comprises a partial phased array aperture comprising multiple different sets of different antennas among the plurality of receive antenna elements and the plurality of transmit antenna elements.