by on December 17, 2024
A resonant circuit can only have low damping (excessive Q, narrow bandwidth) if it's a "closed" circuit, with no power dissipating elements. 108-109 However such a circuit doesn't produce radio waves. A resonant circuit with an antenna radiating radio waves (an "open" tuned circuit) loses energy quickly, giving it excessive damping (low Q, large bandwidth). There was a fundamental tradeoff between a circuit which produced persistent oscillations which had slender bandwidth, and one which radiate...
22 views 0 likes