Non-Foster Self-oscillating Single-loop Antenna - Experimental Investigation

Recent theoretical proposal of a self-oscillating single-loop non-Foster antenna is complemented by experimental verification. The measurements on scaled prototype (a loop smaller than
$\lambda/10$
, operating in 10–60 MHz RF regime) revealed self-oscillations tunable across 1:2.2 bandwidth. Such a loop is promising candidate for unit cell of future active metasurfaces.