A Miniature Ultrawideband Electric Field Probe Based on Coax-Thru-Hole via Array for Near-Field Measurement
In this paper, a miniature electric field probe with an ultrawideband of 9 kHz-20 GHz is proposed, fabricated, and tested. The electric field probe is fabricated on a four-layer printed circuit board using high-performance and low-loss Rogers material (εr = 3.48 and tan δ = 0.0037). Coax-Thru-hole via array is used to control the signal via impedance to achieve impedance 50 Ω match over the whole working band, reducing the harmful influence on the probe's characteristic. The ground vias, called via fence, are utilized to suppress the resonance caused by the parallel-plate mode of conductor-backed coplanar waveguide (CB-CPW), expanding the working frequency band. Experimental result shows |S21| rather smooth in operation band, demonstrating the working frequency band is up to 9 kHz-20 GHz. The electric field probe has a 2-3 mm spatial resolution, which has a good ability to locate the interference source.
Z. Yan et al., "A Miniature Ultrawideband Electric Field Probe Based on Coax-Thru-Hole via Array for Near-Field Measurement," IEEE Transactions on Instrumentation and Measurement, vol. 66, no. 10, pp. 2762-2770, Institute of Electrical and Electronics Engineers (IEEE), Oct 2017.
The definitive version is available at https://doi.org/10.1109/TIM.2017.2681282
Electrical and Computer Engineering
Electromagnetic Compatibility (EMC) Laboratory
National Natural Science Foundation (China)
Keywords and Phrases
Coplanar waveguides; Electric fields; Frequency bands; Printed circuit boards; Probes; Ultra-wideband (UWB); Waveguides; Conductor backed coplanar waveguides; Interference sources; Near-field measurement; Operation bands; Parallel plate modes; Spatial resolution; Ultrawideband electric fields; Working frequency; Electric losses; Coax-Thru-hole via array; Electric field probe; Miniature; Ultrawideband; Via fence
International Standard Serial Number (ISSN)
Article - Journal
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