Related Experiment Video
Updated: Feb 4, 2026
08:32
Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors
Published on: January 29, 2013
14.4K
Development of 10 kHz-400 MHz high sensitivity monopole electric field probe
Shunyu Yao1, Zhongyuan Zhou1,2, Hang Liang1
1Research Center for Electromagnetic Environmental Effects, School of Mechanical Engineering, Southeast University, Nanjing 211189, China.
The Review of Scientific Instruments
|February 2, 2026
Summary
This study developed an electric field probe (10 kHz-400 MHz) for measuring electromagnetic field intensity. The probe uses DC voltage, achieving high sensitivity and accuracy for complex environments.
Area of Science:
- Electromagnetic compatibility and interference
- Sensor technology and instrumentation
Background:
- Increasingly complex electromagnetic environments necessitate accurate electric field intensity measurements.
- Electric field probes are essential tools for characterizing electromagnetic fields.
Purpose of the Study:
- To develop a novel electric field probe with a wide frequency range.
- To provide a reliable method for measuring electric field intensity using DC voltage indication.
Main Methods:
- Design and integration of a monopole antenna, impedance conversion module, amplifier, and detection module.
- Calibration of the probe within a TEM cell.
- Implementation of shielding to enhance sensitivity.
Main Results:
- The developed electric field probe operates within the 10 kHz-400 MHz frequency range.
- Post-calibration, the probe exhibits an error of less than 6 dB.
- Shielding improved probe sensitivity to 90 dB (μV/m) and maximum detectable intensity to 140 dB (μV/m).
Conclusions:
- The developed electric field probe is a viable instrument for measuring electric field intensity in complex electromagnetic environments.
- The probe's design offers a balance of sensitivity, accuracy, and a broad frequency response.
- The DC voltage indication method provides a straightforward means of field intensity measurement.
More Related Videos
Related Concept Videos
01:16Electric Field
12.8K
Consider two point charges, each exerting Coulomb force on the other. It is possible to describe the Coulomb interaction via an intermediate step by defining a new physical quantity called the electric field.
In the new picture, imagine that the first charge sets up an electric field independent of all other charges in the universe. When another charge comes in its vicinity, the second charge experiences an electric force depending on the electric field at that point. The source charge does not...
In the new picture, imagine that the first charge sets up an electric field independent of all other charges in the universe. When another charge comes in its vicinity, the second charge experiences an electric force depending on the electric field at that point. The source charge does not...
12.8K
01:12Determining Electric Field From Electric Potential
5.0K
The electric field and electric potential are related to each other. If the electric field at various points in the region of interest is known, it can be used to calculate the electric potential difference between any two points. Similarly, if the electric potential is known for various points, then it is possible to calculate the electric field.
In general, regardless of whether the electric field is uniform, it points in the direction of decreasing potential because the force on a positive...
In general, regardless of whether the electric field is uniform, it points in the direction of decreasing potential because the force on a positive...
5.0K
01:13Finding Electric Potential From Electric Field
5.6K
For a system of charges, it is easy to calculate the system's potential because potential is a scalar quantity. However, in some instances where calculating the electric field is more straightforward than finding the potential, the electric field is used to calculate the system's potential. For a positive charge, the electric field is radially outward, and the potential is positive at any finite distance from the positive charge. In such an electric field, the motion away from the...
5.6K
01:20Electric Field Inside a Conductor
7.5K
When a conductor is placed in an external electric field, the free charges in the conductor redistribute and very quickly reach electrostatic equilibrium. The resulting charge distribution and its electric field have many interesting properties, which can be investigated with the help of Gauss's law.
Suppose a piece of metal is placed near a positive charge. The free electrons in the metal are attracted to the external positive charge and migrate freely toward that region. This region then...
Suppose a piece of metal is placed near a positive charge. The free electrons in the metal are attracted to the external positive charge and migrate freely toward that region. This region then...
7.5K
01:25Electric Field Lines
9.6K
The three-dimensional representation of the electric field of a positive point charge requires tracing the electric field vectors, whose lengths decrease as the square of their distance from the charge and which point away from the charge at each point. This vector field is no doubt challenging to visualize. The visualization of electric fields becomes quickly intractable as the number of charges increases.
The solution to this problem is to use electric field lines, which are not vectors but...
The solution to this problem is to use electric field lines, which are not vectors but...
9.6K
01:23Induced Electric Fields
4.6K
The fact that emfs are induced in circuits implies that work is being done on the conduction electrons in the wires. What can possibly be the source of this work? We know that it’s neither a battery nor a magnetic field, as a battery does not have to be present in a circuit where current is induced, and magnetic fields never do any work on moving charges. The source of the work is in fact an electric field that is induced in the wires. For example, if a stationary conductor is placed in a...
4.6K