Abstract: Analytical expression of transmission for the orbital angular momentum (OAM) communication using loop antenna arrays and paraboloids is derived to achieve a communication distance of 100 m.

Abstract: The existing robust design method for differential microphone arrays (DMAs) allows control over array performance from either the directivity factor (DF) or white noise gain (WNG) ...

An RAF Hawk T1 jet trainer makes a dramatic near-inverted pass through the Mach Loop in Wales. Banking steeply between the valleys, the aircraft shows just how tight and aggressive low-level flying ...