Systems for Synthetic Aperture Radar Transmit and Receive Antennas

A transmit and receive antenna system comprising:

• a transmit antenna array configured to transmit a plurality of radio frequency transmit signals, the transmit antenna array comprising:
• a plurality of patch antenna elements mounted to a printed circuit board, each patch antenna element belonging to a subarray;
• one or more power amplifiers, each power amplifier feeding a subarray of the patch antenna elements;
• and
• a feed that feeds the one or more power amplifiers and comprises a single digital to analog converter and a single upconverter;
• and
• a reflectarray receive antenna configured to receive radio frequency signals comprising:
• a stackup of a plurality of layers of reflectarray antenna elements;
• at least one antenna feed configured to receive radio frequency signals reflected from the plurality of reflectarray antenna elements;
• and
• at least one low noise amplifier electrically connected to the at least one antenna feed.

A transmit and receive antenna system comprising:

• a transmit antenna array mounted to first surface of a housing and configured to transmit a plurality of radio frequency transmit signals, the transmit antenna array comprising:
• a plurality of patch antenna elements mounted to a printed circuit board, each patch antenna element belonging to a subarray;
• and
• one or more power amplifiers, each power amplifier feeding a subarray of the patch antenna elements;
• and
• a reflectarray receive antenna mounted to a second surface of the housing and configured to receive radio frequency signals comprising:
• a plurality of reflectarray antenna elements mounted to a printed circuit board;
• at least one antenna feed mounted to a feed arm configured to receive radio frequency signals reflected from the plurality of reflectarray antenna elements;
• and
• at least one low noise amplifier electrically connected to the at least one antenna feed;
• wherein the housing is configured to collapse and the transmit antenna and the reflectarray receive antenna are contained within the housing when the housing is collapsed;
• wherein feed arm to which the antenna feed of the reflectarray receive antenna is mounted is configured to collapse;
• and
• wherein the feed arm is configured to be contained within the housing between the two separate surfaces on which the transmit antenna and the reflectarray receive antenna are mounted when the housing is collapsed.