Abstract: Low Probability of Detection (LPD) communication aims to obscure the presence of radio frequency (RF) signals to evade surveillance. In the context of mobile surveillance utilizing unmanned ...

Abstract: We present an electronically reconfigurable antenna array offering low probability of intercept/detect (LPI/LPD) and secure communications capabilities simultaneously at the physical layer.

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Astronomers Detect Smallest Known Clump of Pure Dark Matter Using Gravitational Lensing A pure dark matter clump about a million solar masses and 10 billion light-years away has been detected through ...