Loop Antennas With Variable Reactance TRIZ Cases
- MRI Receive Antenna Detuning Circuit for Transmit Field Protection
Switchable reactive elements match MRI receive antenna impedance in receive mode and detune it during transmit to prevent RF current damage.
- Magnetic Antenna Auto-Tuning for Narrow Bandwidth Stability
A feedback control loop retunes a compact magnetic antenna against environmental detuning while waking on demand to limit power use.
- PCB Antenna Discontinuities for Harmonic Suppression
A printed circuit antenna uses localized structural discontinuities to suppress spurious radiation at undesired frequencies.