G-DualScan

G-DualScan represents a step forward in spherical near-field measurements. It measures antennas with large dimensions and analyzes a very broad range of frequency bands from 200 MHz to 18 GHz. It consists of a single-probe gantry arm and a multi-probe arch up to 12 meters (40 feet) in diameter.

Key Features:

Technology

• Near-field/Spherical

Measurement capabilities

• Gain
• Directivity
• Beamwidth
• Cross polar discrimination
• Sidelobe levels
• 3D radiation pattern
• Radiation pattern in any polarization (linear or circular)
• Antenna efficiency

Frequency bands

• Single-probe: 200 MHz - 18 GHz, divided in sub-bands (up to 40 GHz upon request)
• Multi-probe: 400 MHz - 6 GHz (400 MHz - 18 GHz or 70 - 400 MHz upon request)

Max. size of DUT

• 7 m diameter

Max. weight of DUT

• 1000 kg

Typical dynamic range

• 50dB

Oversampling

• Elevation tilt of the AUT

Application:

• Antenna Measurement
• Pulsed Measurement
• Phased Array Antenna Measurement

G-DualScan uses a Vector Network Analyzer as the RF source/receiver for antenna measurements. The Amplification Unit has RF amplifiers for each of the RX and TX channels. G-DualScan uses a Transfer Switching Unit to emit from the AUT to the probe(s) or vice versa. A dedicated RF switch allows the selection of either the single-probe or the multi-probe set-up. The Positioner Controller drives the goniometer and azimuth axes for the AUT, and the elevation axis for the gantry arm. Measurements can be performed in both continuous wave and optional pulsed mode. In the case of phased array antenna measurement, the system utilizes an optional real time controller to control and synchronize the measurement system with the device under test.