The idea of a loop antenna is simple enough. It’s an inductor intended to respond to the magnetic portion of the wave rather than the electric part. They’re normally made of a single turn of ...

To automate tuning, an Arduino switches a bank of capacitors and inductors in and out of the circuit. By varying the load, it can find the ideal matching for the given antenna and frequency.

Having a switched inductor on a PCB board is basically having and antenna emitting electromagnetic waves in the frequency spectrum of the figure 5. Sensitive RF or analog circuits performances may be ...