Desenvolvimento e Calibração de Sonda de Campo Elétrico para a Faixa de 2 a 3 GHz (Design and Calibration of Electric Field Probe to the Frequency Range of 2 to 3 GHz)

Catia Valdman (catia@valdman.com)1, Maurício Henrique Costa Dias (mhcdias@ime.eb.br)2, José Carlos Araujo dos Santos (araujo@ime.eb.br)2


1Instituto Nacional da Propriedade Industrial
2Instituto Militar de Engenharia

This paper appears in: Revista IEEE América Latina

Publication Date: Dec. 2008
Volume: 6,   Issue: 7 
ISSN: 1548-0992


Abstract:
Two probes designed for electric field measurements were constructed by two semi-rigid coaxial cables, through a non-expensive simple handmade process. Both probes were also simulated by a program specifically used for microwave devices and calibrated following international standards for the frequency range of 2 to 3 GHz. The simulations and the calibration procedure, which was performed in a semi-anechoic chamber, evaluated the measured voltage, performance factor and S11 of each probe. The simulated and experimental results were compared. The return loss parameter was used to determine the maximum operation frequency. The results showed that even simple probes as the ones constructed in the present work, when properly calibrated, can be used to measure with good accuracy the magnitude of the electric field in the considered frequency range.

Index Terms:
Electric field measurement, electromagnetic analysis, electromagnetic compatibility, probe antennas, UHF detectors   


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