Agilent
85070E Dielectric Probe Kit
200 MHz to 50 GHz
Technical Overview
New
!
• Performance probe! Combines
rugged, high temperature and
frequency performance in a slim
design. Perfect for your most
demanding applications!
Features
• Measures complex permittivity
over a broad frequency range
• Results can be viewed in a variety
of formats: er', er", loss tangent,
and Cole-Cole
• Software runs on a PC, or internally
on the PNA Series of network
analyzer and guides user through
easy calibration and measurement
• Data is easily shared with other
Windows
®
based programs or
through the user programmable
Component Object Model (COM)
interface
Swept High-Frequency Dielectric Measurements
The Agilent Technologies 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 Agilent
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.
Software displays dielectric constant and loss factor as a function of frequency.
2
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.
Display data in chart form, table form, or both.
3
Calibration Refresh Reduces Drift Errors
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 Agilent 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. Errors due to test port
cable movement are removed by the
new calibration.
ECal module connected in line
Water with and without Electronic Calibration Refresh
This measurement shows the effects
of system drift and cable instability
on a dielectric measurement of water
and the improvement with Electronic
calibration refresh. Both measurements
were made 24 hours after the original
calibration. The lighter colored, noisier,
trace was made before the Electronic
Calibration refresh was turned on.
The darker, smoother, trace shows the
improvement made after the Electronic
Calibration refresh was turned on.
For systems without an ECal module,
a simpler, "one standard" refresh
calibration feature is also available,
which can reduce the effects of
system drift over time or temperature.
After the initial "three standard" probe
calibration is performed, the calibration
can be refreshed at any time with the
connection of a single standard. Any
one of the three calibration standards
can be defined as the refresh standard.
4
New Options Allow You to Configure Kit to Meet Your Needs
Now three probe designs to choose from
New! Performance Probe
Combines rugged, high temperature,
and frequency performance in a
slim design.
This probe features rugged,
high temperature and frequency
performance in a slim design, perfect
for your most demanding applications.
The probe is sealed on both the probe
tip and the connector end, which make
it our most rugged probe. The probe
withstands a wide –40 ºC to +200 ºC
temperature range, which allows
measurements versus frequency
and temperature.
The probe can be autoclaved, so it
is perfect for applications in the food,
medical, and chemical industries
where sterilization is a must. The
slim design allows it to fit easily in
fermentation tanks, chemical reaction
chambers, or other equipment with
small apertures.
The small diameter also allows it to
be used with smallest sample sizes
of all Agilent’s probes. It is useful for
measuring liquid, semi-solid, as well
as flat surfaced solid materials. The
Performance Form Probe Kit comes
complete with a calibration short.
Frequency range 500 MHz to 50 GHz.
2.4mm male connector
Performance Probe Kit
150
Borosilicate
glass seal
1.6
9.5
2.4 mm male
connector
Hermetically sealed on both ends
(all dimensions in mm)
Stainless steel
T316L body
Nickel plated
tungsten center
conductor
Stainless steel
T304L tip
5
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