Antenna Measurement System RMS 0740 (part 2)

The RMS 0740 rotates an object on the turntable and measures the radiation. With a rotation around the X, Y and Z axis the software plots the patterns and calculates statistics including Total Radiated Power (TRP). Each measuring point can contain a sweep of multiple frequency, so that multiple radiation patterns can be measured in one rotation sequence.

With the Generator option the RMS can also perform an antenna sweep and show the antenna gain over frequency.

The RMS system works well in a moderate space. A 4x4x3 meter room works well above 800MHz. For smaller spaces a few strategic absorbers may be required..

A report on accuracy evaluations of the RMS is available on request.

Software user-interface

The RMS software controls the measurement system and allows easy setup and performing the measurements, organizing the data and create reports. It will guide the user through the 3 rotation axis steps.

For EUT with a constant carrier mode the RMS is used in a passive mode to rotate the EUT and record the field strength. The receiver can measure multiple frequencies for each measurement point so that harmonic patterns (up to 4GHz) can be measured simultaneously. The minimum step size is 2 degrees.

For EUT without a transmitter (prototype or standalone antenna) the Generator output can be used to feed a test signal to the EUT. In this mode the RMS can measure rotation patterns (at up to 30 frequencies simulations) or perform a frequency sweep of the antenna gain. The Sparameters of the feed coax can be imported to compensate for the loss and impedance of the cable.

In idle mode the RMS monitors the signal and shows the polarization in real time. It can also transmit a carrier with a calibrated power on the horizontal or vertical antenna.

The results can be presented in Antenna Gain (dBi), Radiated Power EiRP (dBm) or Field Strength (dBuV/m). The software calculates statistics such as Min/Max level, Average, Total Radiated Power (TRP), Antenna Efficiency (dBi) and Directivity (dB).

The rotation table can be controlled manually and a rotation offset aides in the rotation of large objects.


Reference Measurement.

Source: RSI


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