Atomic 2D electric field imaging of a Yagi–Uda antenna near-field using a portable Rydberg-atom probe and measurement instrument

AbstractWe present electric field measurements and imaging of a Yagi–Uda antenna near-field using a Rydberg atom–based radio frequency electric field measurement instrument. The instrument uses electromagnetically induced transparency with Rydberg states of cesium atoms in a room-temperature vapor and off-resonant RF-field–induced Rydberg-level shifts for optical SI-traceable measurements of RF electric fields over a wide amplitude and frequency range. The electric field along the antenna boresight is measured using the atomic probe at a spatial resolution of ${\lambda }_{RF}/2$ with electric field measurement uncertainties below 5.5%, an improvement to RF measurement uncertainties provided by existing antenna standards.

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An Electroscope System Based on Electric Field Measurement Method for UHV Transmission Lines

International Journal of Emerging Electric Power Systems ◽

10.2202/1553-779x.2154 ◽

2009 ◽

Vol 10 (2) ◽

Author(s):

Fan Yang ◽

Wei He ◽

Tao Chen ◽

Xiaochu Luo ◽

Yongchang Fu

Keyword(s):

Electric Field ◽

Electric Fields ◽

Transmission Lines ◽

Field Measurement ◽

Measurement Method ◽

Electric Field Measurement ◽

Set Up ◽

Global Regularization ◽

Uhv Transmission Lines ◽

Internet Network

The paper describes an electric field measurement method based electroscope system to check the electrification state of ultra-high voltage transmission lines, which is composed of three parts: 1) Measuring terminal; 2) Central sever; 3) GPRS and Internet network. The measuring terminal was used to measure the electric field and the location of the measuring points, then the measured data was sent to the central sever by GPRS and Internet network, and requested for an electricity state confirmation.When the sever received a request from a terminal, the electric fields and locations of the measuring points were obtained first, then according to the location of the measuring points, the server searches the corresponding objective transmission lines in the database and read their parameters. According to the parameters of the measuring points and transmission lines, a calculation would be carried out to confirm the electrification state of the transmission lines. For the confirmation calculation, equations for the electric field inverse problem of the transmission lines were set up first, then global regularization and damped Gauss Newton (DGN) method were used to solve the inverse problem.A 500kV double loops transmission line was taken as an example to verify the validity of this method. The electric field and location of 11 measuring points were measured by the measuring terminal firstly, and then sent to the central sever. Electrification state was confirmed by the central sever.

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A near-field measurement based method for predicting field emissions below 30 MHz in a CISPR-25 test set-up

Advances in Radio Science ◽

10.5194/ars-14-147-2016 ◽

2016 ◽

Vol 14 ◽

pp. 147-154

Author(s):

Zongyi Chen ◽

Stephan Frei

Keyword(s):

Electric Field ◽

Field Measurement ◽

Near Field ◽

Ground Plane ◽

High Sensitivity ◽

Field Measurements ◽

Alternative Methods ◽

Antenna Measurement ◽

Cispr 25 ◽

Near Field Measurement

Abstract. Automotive electric components are required to pass radiated emission tests. According to CISPR-25 standard (ALSE method), an expensive anechoic chamber is needed for conducting the field emission testing. Reproducibility due to high sensitivity to chamber and setup details is poor. Alternative methods, which perform measurements without using a chamber are preferred. This paper provides an alternative pre-compliance method for predicting the fields of CISPR-25 results for frequencies below 30 MHz, based mainly on electric near-field measurements. The motivation is that common-mode current measurements or magnetic near-field measurement based methods give good field prediction above 30 MHz, but fail below 30 MHz. The proposed method applies Huygens' Principle for field prediction. The electric field distribution for the defined Huygens' surface and the equivalent currents are estimated from a small number of field measurements close to the ground plane. It is shown that the electric field can be well predicted, compared with a full-wave simulation the deviation is within 4 dB, compared with a standard antenna measurement up to 3 MHz the deviation is less than 1 dB.

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Vapor cell geometry effect on Rydberg atom-based microwave electric field measurement

Chinese Physics B ◽

10.1088/1674-1056/27/3/033201 ◽

2018 ◽

Vol 27 (3) ◽

pp. 033201

Author(s):

Linjie Zhang ◽

Jiasheng Liu ◽

Yue Jia ◽

Hao Zhang ◽

Zhenfei Song ◽

...

Keyword(s):

Electric Field ◽

Field Measurement ◽

Rydberg Atom ◽

Cell Geometry ◽

Vapor Cell ◽

Electric Field Measurement ◽

Geometry Effect

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The Design and Implementation of Ship Electric Field Measurement System Based on MSP430

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.622-623.1378 ◽

2012 ◽

Vol 622-623 ◽

pp. 1378-1383

Author(s):

Peng Han ◽

Yang Li

Keyword(s):

Electric Field ◽

Measurement System ◽

Field Measurement ◽

High Accuracy ◽

Low Power Consumption ◽

Electric Field Measurement ◽

Low Snr ◽

Design And Implementation ◽

Key Technologies ◽

Software And Hardware

The ship electric field has become a new physical field which is widely concerned at home and abroad in recent years. For the research of ship electric field, one of the most effective methods is to measure it underwater. According to the analysis of ship electric field signal’s characteristics, the ship electric field measurement system based on MSP430F149 was designed and the key technologies of software and hardware were also presented in this paper. The results of experiment demonstrated that the system could effectively measure the ship electric field signal in a low SNR. Meanwhile, it has the advantages of low power consumption, high accuracy and credible.

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