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85070E Dielectric Probe Kit 200 MHz to 50 GHz

Technical Overviews

Swept High-Frequency Dielectric Measurements

The Keysight Technologies, Inc. 85070E Dielectric Probe Kit determines the dielectric properties, or complex permittivity, of many materials. Because a materials dielectric properties are determined by its molecular structure, if the molecular structure changes, so will the dielectric properties. Measuring them can indirectly measure other properties that are also correlated to the molecular structure, and can be a valuable alternative when the property of interest is difficult to measure directly.

Measurements are made by simply immersing the probe into liquids or semi-solids — no special fixtures or containers are required. Measurements are non-destructive and can be made in real time. These important features allow the Dielectric Probe Kit to be used in process analytic technologies.

The complete system is based on a network analyzer, which measures the material’s response to RF or microwave energy. The probe transmits a signal into the material under test (MUT). Depending on the Keysight network analyzer and probe used, frequencies can extend from 200 MHz to 50 GHz.

The included software controls the network analyzer and guides the user through easy setup and measurement steps. In seconds, it calculates and displays complex permittivity in a variety of formats, including dielectric constant, dielectric loss factor, loss tangent or Cole-Cole.

Easy Data Analysis Display

The split screen window and marker aids in data analysis. Simply click on a point on the chart or table to activate and move the marker.

Connect to other programs

Data charts and tables can easily be copied and pasted into any Windows-based application for further analysis or report generation. The component object model (COM) interface allows the measurement to be setup, triggered, and read from a user written program. This is valuable for analyzing material changes over time. Example Visual Basic® and C++ projects are included to aid program development.

Calibration Refresh Reduces Drift Errors1

The new automated Electronic Calibration Refresh feature recalibrates the system au­tomatically, in seconds, just before each measurement is made. This virtually eliminates cable instability and system drift errors. Processes can now be monitored over long time periods, including tests that vary MUT temperature and pressure over time.

How it works:

The Keysight Electronic Calibration module (ECal) microwave ports are connected in line between the probe and the network analyzer test port cable. The ECal module commu­nication port is connected either to the PC or PNA Series network analyzer running the 85070E software. The software guides the user through a normal “three standard” cali­bration, (usually open, short, water), performed at the end of the probe. This calibration is then transferred to the ECal module. The ECal module remains in line and a complete ECal calibration is automatically performed before each measurement.

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