RadiMation Application Note 103
Contents
Possibility to determine the antenna diagram of an antenna
This Application Note will explain how measurements can be done in RadiMation® to determine the antenna diagram of an antenna on one or more frequencies. RadiMation® is not designed to perform antenna diagram measurements, but due to its flexibility it is possible to perform this type of measurement.
Overview
Fixed and stable signal applied to antenna. Can be a signal generator, or an EUT that contains the antenna that generates a stable signal Measure it depending on the turntable angle.
Hardware configuration
Antenna on turntable
It is required that the used RadiMation® license contains the Radiated Emission module.
In this application note we used a virtualized setup, which uses the Virtual Spectrum Analyzer and the virtual Turntable. This virtualized setup has a signal on .... MHz, which fluctuates depending on the turntable angle. It can be used to demonstrate the capability of RadiMation® to determine the antenna diagram. This same measurement can also be performed on any RadiMation® installation
Frequency measurement to determine the frequency
Multiband emission, applicable frequency range Measure on the turntable angle on which the highest antenna gain is expected. No need to specify a limitline Detect a single peak. Ensure that it is listed in the table of peaks Only necessary to use the peak detector. Also for final measurement. Short measure time for final measurement.
- screenshot of TSF setup -
Verify if the correct peak is selected. Select a single peak that should be measured.
- screenshot with frequency graph with selected peak -
Determining the angle
Switch to the Polar graph. It will show the amplitude and the turntable angle on which the value was measured. Ensure that only the peak final measurement detector is activated. Activate the continuous measurement mode.
- screenshot of polar graph. No polar trace yet -
Press the Turn CW and Turn CCW buttons. Pressing the Turn CW or Turn CCW button again while it is pushed, will stop the turning. Can have benefit to first turn to a start angle (for example -180 degrees), and then start the 'continuous measurement mode'. Then press the Turn CW which will start a complete turntable rotation. During the turntable movement, the continuous measurement on the selected peak will be performed and the measured data will be updated in the polar graph. The antenna diagram will be determined and shown in the polar plot dynamically.
Automated measurement of multiple frequencies
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