The Application of Electric Feed-in with the Low Sensitivity and Low Spatial Resolution Probe

This study presents a design method for a non-contact probe suitable for electric field injection. The probe is fabricated using an FR4 double-layer and single-layer board process, with screws securing it through positioning holes. The simulated bandwidth spans from 300 <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\text{kHz}$</tex> to 20 GHz, achieving a sensitivity range of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$-30 \ \text{to} \ -40 \ \text{dB}$</tex>. The resolution varies from 2.49 mm to 2.14 mm, decreasing as the frequency increases, which enhances its applicability for small-scale electric field injection. Measurements up to 6 GHz demonstrate accuracy closely aligned with the simulation results.