Albanese Defense and Energy Development Company — Department of Defense STTR Phase II: A18B-T009

Description

This effort is developing a wideband transmitter (500 kilohertz - 500 megahertz) for military and commercial use.  The transmitter defeats antenna size requirements through the use of mathematical methods that fragment the signal in the far field into efficiently radiated components.  Therefore, for example, powerful amplitude modulated signals (AM) can be radiated from small devices that are only one meter or less, rather than the 75 meters needed to radiate one megahertz from a quarter wave antenna.  Signals are fragmented using time-frequency algorithms that provide signal components to serve as bases or so-called frames (which are redundant signal reconstruction sets).  The signal fragments are radiated by wideband, small antennas alternating between basis or frame functions, and generally only two such small antennas are needed.  The signal fragments are computed in software that receives the desired AM, FM, or other coded waveform which the user desires to radiate.  After power amplification, the fragments are radiated and combine in the far field to reconstruct the longer wavelength signal desired.  Because of the wideband nature of the fragment radiators, the far field signal formation occurs close to the transmitter itself.