Design of a Broadband Electric Near-Field Probe With Improved Sensitivity Using Additional Tips

A low-cost miniature broadband electric field probe for electric near-field measurements is proposed. To improve the sensitivity of the probe, additional rectangular tips with the optimized dimension of 0.5 mm x 1 mm x 0.017 mm are added in the proposed probe design. The calculated S
₂₁
of the proposed design with additional tips is improved by about 7 dB over the operating frequency band ranging from 1 MHz to 6 GHz, comparing to that of the design without additional tips. The half spatial resolutions of the proposed design at 3 GHz and 6 GHz are 2.19 mm and 1.97 mm, respectively.