The Akashteer drone system embodies a sophisticated application of stealth technologies that leverage fundamental principles of physics and materials science to evade radar detection. Central to this capability is radar absorption technology, which reduces the radar cross-section (RCS) of the drones, making them effectively invisible or difficult to discern by conventional radar systems. These drones employ radar-absorbent materials (RAM), which absorb and dissipate electromagnetic energy emitted by radar waves rather than reflecting it back to the source. By converting this energy into heat or scattering it internally, RAM significantly diminishes the strength of the radar return signal.
In addition to materials, the geometric design of Akashteer drones plays a crucial role. Low-observable shaping involves careful structuring of surfaces and edges to minimize the angles at which radar waves reflect directly back to enemy sensors. Facets and curves redirect radar emissions away from the receiver, further reducing detectability. This physical shaping complements the materials’ absorption properties, collectively producing a synergistic stealth effect.
However, radar detection technologies have evolved to counter such stealth approaches. Advanced radar systems employ techniques including frequency diversity, multifaceted radar waveforms, and enhanced signal processing algorithms. Low-frequency radars can detect stealth aircraft by exploiting their longer wavelengths, which interact differently with stealth materials and shapes. Additionally, active electronically scanned array (AESA) radars, such as India’s indigenous Rajendra phased-array radar integrated into the Akash system, apply rapid beam steering and pulse modulation to detect subtle radar returns. Multisensor data fusion—combining radar with optical, acoustic, and infrared sensors—enables further detection capabilities despite stealth attempts.
Ultimately, the Akashteer drones showcase how integrating physics-based stealth design with cutting-edge material science creates elusive platforms capable of operating within contested airspace. Yet, this dynamic of stealth versus detection remains an ongoing technological duel, with emerging radar technologies continuously adapting to perceive low-observable systems like the Akashteer swarm.
-Rashmi Kumar
