A conductive loop interrupted by a slit, often paired concentrically with another similar ring. The structure acts as an LC circuit, where the ring provides inductance and the gap provides capacitance. Engineers use them to build split-ring resonators for microwave filters or to engineer artificial materials with a negative magnetic permeability.
The antenna design relies on a split-ring resonator to achieve the required notch frequency without adding bulky discrete components.
Related terms
Resonance
The state in an LC circuit where capacitive and inductive reactances cancel each other out.
Resonant
Tuned to naturally oscillate at a specific frequency where energy transfer is maximized.
Inductor
A passive two-terminal electrical component that stores energy in a magnetic field when electric current flows through it.