RF Voltage-Current (VI) Probes

Precision RF measurement enabling plasma control

  • Measure Multiple Frequencies Simultaneously

    Only one sensor required for multiple frequency applications, saving significant cost. Measurements available when frequency is +/-10% of the calibrated frequency.

  • Measurement Accuracy

    1% Accurate voltage, current, power and impedance over a range of impedances traceable to NIST, ensuring reproducible and repeatable data from sensor to sensor.

  • Intuitive Software

    Our software, which can be installed on any PC or laptop, is very intuitive and user friendly.

  • Multiple Models

    We have multiple models to suit you installation and voltage/current/power requirements for seamless integration into your process equipment and control loop.

  • Pulse Features

    Measure the waveform of your pulse with our time-resolution mode.

  • Communication Protocols

    Ethernet, EtherCAT, RS232 and USB APIs available for ease of integration with any system.

Impedans RF sensors are cutting-edge devices designed to measure the radio frequency (RF) parameters. These sensors are used in a wide range of applications, including fundamental plasma research, chamber and process design, live process monitoring, and manufacture, maintenance and repair of RF plasma equipment.

The sensors provide accurate in-line RF Power and impedance measurement in continuous wave and pulsed RF applications. Additional features allow you to measure the same parameters for up to 15 harmonics of the fundamental frequency as well as recreate the RF waveform and predict the ion flux of your plasma.

Five fundamental frequencies on a single sensor, saving cost of purchasing multiple sensors and time having to switch between sensors when taking readings. This also enables measurements of multiple frequencies simultaneously on the same line for multi frequency applications.

RF Frequency tracking band of ± 10% around the fundamental frequency allows accurate readings even when the frequency is variable around the fundamental. 

Smith Chart

Achieve in-line accuracy specifications comparable to expensive offline vector network analyzers.

Our calibration uses RF calorimetry and vector network analyzer technology to embed the power of both methods in a compact and responsive form factor. Due to the sampling methods used in our technology we do not require the same amount of averaging as a calorimeter or directional coupler to provide an accurate reading meaning you get quicker accurate readings.

Our sampling methods also use advanced harmonic rejection which ensures accurate power measurement at the selected frequency only and does not require any physical filters.

Our sensors are also calibrated up to 80° C to compensate for temperature variation.

Sensor run-to-run repeatability (< 0.1%), enabling a true gauge of plasma process drift.

Our software has been designed to be easy to use. It can be installed on any laptop or PC using our simple installers.

Our software can be used to control multiple sensors simultaneously allowing you to monitor multiple locations at once. The software is also compatible across Octiv models meaning multiple Octiv models can be controlled from a single computer.

Once installed the software allows the user to select between sensors, configure each sensor, runs scans, visualize live data and import/export data for analysis.

We have multiple models of sensor to allow for varying installation locations and power/voltage/current requirements.

Our standard QC connector model can come with various connectors (see datasheet for full list of connectors) that can be chosen at the time of ordering.

All of our socket style connectors come with a leaf spring design (as shown in the image) which ensures that good electrical contact is made between the pin and the socket.

Auto-switching between CW and Pulsed RF monitoring in time average mode (TAM).

Reports pulse frequency and duty cycle with
sub-microsecond precision in TAM.

Integrates over pulse profile for accurate average
power and impedance measurement.

Time-resolved mode with 1 microsecond resolution
for detailed pulse waveform analysis.

Pulse-trend mode to monitor a number of points within the pulse profile, with 1 microsecond gate times

Software or systems on your site can communicate directly with the sensor without using our software through our API protocols. The sensor is enabled for RS232, USB and Ethernet or EtherCAT.

For more details on the API please contact us.

RF Spectrometer Octiv Mono Octiv Poly Octiv Suite

RF Voltage Current Probe - Octiv Mono 2.0

RF Voltage Current Probe - Octiv Poly 2.0

RF VI Probe - Octiv Suite

Installation Type
Proximity
Inline
Inline
Inline
# of Simultaneous Frequencies
5
1
5
5
Real Power
FWD Power
REF Power
Impedance
Voltage
Yes - But uncalibrated
Current
Yes - But uncalibrated
Phase Angle
Harmonics
Yes - But uncalibrated
Ion Flux
RF Waveform
Pulse Frequency
Duty Cycle
Octiv Mono

RF Voltage Current Probe - Octiv Mono 2.0

Installation Type
Inline
# of Simultaneous Frequencies
5
Real Power
Yes
FWD Power
Yes
REF Power
Yes
Impedance
Yes
Voltage
Yes
Current
Yes
Phase Angle
Yes
Harmonics
No
Ion Flux
No
RF Waveform
No
Pulse Frequency
Yes
Duty Cycle
Yes
Octiv Poly

Impedans RF Voltage Current Probe - Octiv Poly 2.0

Installation Type
Inline
# of Simultaneous Frequencies
5
Real Power
Yes
FWD Power
Yes
REF Power
Yes
Impedance
Yes
Voltage
Yes
Current
Yes
Phase Angle
Yes
Harmonics
Yes
Ion Flux
No
RF Waveform
No
Pulse Frequency
Yes
Duty Cycle
Yes
Octiv Suite

RF VI Probe - Octiv Suite

Installation Type
Inline
# of Simultaneous Frequencies
5
Real Power
Yes
FWD Power
Yes
REF Power
Yes
Impedance
Yes
Voltage
Yes
Current
Yes
Phase Angle
Yes
Harmonics
Yes
Ion Flux
Yes
RF Waveform
Yes
Pulse Frequency
Yes
Duty Cycle
Yes
RF Spectrometer

Installation Type
Proximity
# of Simultaneous Frequencies
5
Real Power
No
FWD Power
No
REF Power
No
Impedance
No
Voltage
Yes - But uncalibrated
Current
Yes - But uncalibrated
Phase Angle
No
Harmonics
Yes - But uncalibrated
Ion Flux
No
RF Waveform
No
Pulse Frequency
Yes
Duty Cycle
Yes

If you have questions about what product is most suited to your needs

Click here to CONTACT US

We’ll be happy to have a discussion and see how we can help you!