Knowra Stealth technology Stealth technology Stealth technology comprises design methods that reduce the detectability of military systems by radar, infrared sensors, and other detection systems. It lowers signatures rather than making a system invisible.
Radar cross-section : A measure of how detectable an object is by radar, based on the strength of the signal it reflects. Shaping and materials aim to reduce the radar energy returned to a sensor.
Electromagnetic radiation : Energy transmitted through space as coupled electric and magnetic waves. Radar and infrared detection rely on different regions of this spectrum.
Pyotr Ufimtsev : A Soviet physicist whose mathematical work described how electromagnetic waves scatter from surfaces. His diffraction theory informed later calculations of radar reflections from aircraft shapes.
Stealth aircraft : Aircraft designed to reduce detection by radar, infrared, acoustic, or visual sensors. Aircraft combine carefully aligned surfaces, controlled emissions, and thermal management.
Electronic warfare : Military actions that use or counter electromagnetic energy to disrupt, deceive, or exploit an adversary. Jamming and deception interfere with sensors rather than primarily reducing the platform's signatures.
Radar-absorbent material : A material designed to absorb incident radio-frequency energy and dissipate it rather than reflect it. Absorbing radar energy can complement the redirection achieved by shaping.
Radar : A system that uses radio waves to detect, locate, or track objects. Radar is the principal sensing technology that aircraft shaping was designed to defeat.
Echo 1 : A United States Air Force research project that investigated radar scattering from aircraft-shaped models. Its experiments helped establish practical methods for measuring and reducing radar returns.
Stealth ships : Naval vessels shaped and equipped to reduce radar, infrared, acoustic, and visual signatures. Ships apply signature reduction to large structures, exposed equipment, and wake patterns.
Radar jamming : The deliberate transmission of signals to interfere with an adversary's radar operation. Jamming can mask a target temporarily, while stealth reduces the energy sensors receive.
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