Kapteos is targeting the following applications where their products and services would be of interest to the relevant organization. 

 ANTENNA – NEAR FIELD ANTENNA PATTERN CHACTERIZATION 

Kapteos is now offering a comprehensive system to perform in-house antenna pattern characterization for our customers or to sell a customized system adapted to our customer’s needs.

Thanks to the electrooptic technology used in our probes, we offer a unique solution:

• E-Field measurement system

• Cartesian robot

• Vector Network Analyzer if required

• Software to obtain automatically the antenna pattern

 Application Note: Near Field Antenna Pattern Characterization

How do we operate?

STEP 1 The probe is placed few mm away from the antenna. In practice, there is no limitation in terms of antenna size. The Cartesian robot is moving the probe on a single plane (2D E-field mapping).

At each position, the Vector Network Analyzer measures the field strength and its phase.

MODULUS (raw data)

PHASE (raw data)

STEP 2

From the raw data (field strength and phase) at each position of the probe, the software operates a near to far field transformation.

In our case, there is no pre-treatment, no post-treatment, no de-embedding in order to compensate probe interference or setup artefact as our probes are full none interfering. The software operates just the near to far field transformation, no more no less!

With Kapteos you get a fully open-system with no hidden algorithms.

In the example below, we obtain the pattern of the Narda ATM 51-442-6 horn antenna used in the above setup.

We provide the E plane and the H plane antenna radiations.

Black dotted line is the manufacturer data (typical values)

Red solid line is ElectroMagnetics simulation performed by HFSS software (in collaboration with IMEP-LAHC lab Savoie-Mt-Blanc University)

Blue solid line is the radiation pattern extracted from near field mapping

Red solid line is ElectroMagnetics simulation performed by HFSS software (in collaboration with IMEP-LAHC lab Savoie-Mt-Blanc University)

Blue solid line is the radiation pattern extracted from near field mapping

Examples:

Kapteos supports the following antennas and devices
● Spiral antenna for hyperthermia (115 MHz) in liquid phantom
● Various antennas for hyperthermia in liquid phantoms
● GTEM cell (ns pulse)
● UWB ridge antenna
● TEM cells

The system is dedicated to the customers’ needs.

However the following main specifications could be mentioned:

• From few hundreds of MHz to more than 100 GHz

• Easy operation with fast results (mapping may be less than 15 minutes)

• Comprehensive system, all included

 Application Note: Near Field Antenna Pattern Characterization