A radar antenna is the radio-frequency hardware that transmits radar pulses and receives their reflections. By shaping and directing electromagnetic energy, it helps a radar system detect objects, measure distance and speed, and map terrain or obstacles. Antennas may be simple fixed designs or more advanced phased arrays, but their core job is the same: turn electrical signals into usable RF energy and back again.
In cyber security, radar antennas matter because they sit at the edge of sensing systems that guide vehicles, monitor airspace, or protect critical infrastructure. If an attacker can jam, spoof, physically damage, or misconfigure the radar chain, the system may lose visibility or trust bad data. Defenders therefore focus on signal integrity, calibration, redundant sensors, and monitoring for abnormal interference. In autonomous platforms, a compromised radar antenna can affect navigation and collision avoidance, making hardware security part of operational safety.