G-DualScan
I 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.
I G-DualScan System overview INSTRUMENTATION ROOM CHAMBER USB Data Acquisition & Processing Platform 1 Real Time Controller 2 4 Triggers 5 3 Triggers N-PAC GPIB Primary Synthesizer Amplification Unit Mixer Unit Transfer Switching Unit RF Switch Auxiliary Synthesizer Rx Tx Positioner Controller 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.
I G-DualScan Standard system components Multi-probe half arch A choice of probes… • A semi-circular arch of 1280 cm internal diameter with 128 channels (127 probes + 1 reference channel) operating from 400 MHz up to 6 GHz Single-probe gantry arm • A single-probe scanner operating from 200 MHz to 18 GHz in 3 sub-bands (up to 40 GHz upon request) DUT positioner • An azimuth turntable that enables 360° rotation of the DUT and a goniometer to calibrate the system and perform oversampling.
I G-DualScan System specifications* 10 dBi AUT 20 dBi AUT 30 dBi AUT PEAK GAIN ACCURACY 10 dBi AUT 20 dBi AUT 30 dBi AUT - 20 dB SIDELOBES ACCURACY 0.2 - 0.4 GHz ± 1.5 dB ± 1.46 dB ± 1.46 dB 0.4 - 0.8 GHz ± 2.6 dB ± 0.8 dB ± 0.5 dB 0.4 - 1 GHz ± 0.9 dB ± 0.86 dB ± 0.86 dB 0.8 - 1 GHz ± 2.1 dB ± 0.7 dB ± 0.5 dB 1 - 18 GHz ± 0.5 dB ± 0.44 dB ± 0.42 dB 1 - 6 GHz ± 2.1 dB ± 0.7 dB ± 0.5 dB PEAK GAIN REPEATABILITY ± 0.3 dB ± 0.3 dB ± 0.3 dB 6 - 18 GHz ± 2.
I G-DualScan Maximum diameter of DUT* (m) Single-probe FREQUENCY (GHz) 1.5° sampling ANGULAR STEP IN DEGREES 2° 3° 5° 10° sampling sampling sampling sampling Maximum diameter of DUT* (m) Multi-probe FREQUENCY (GHz) X1 NUMBER OF OVERSAMPLING X2 X3 X5 X10 0.4 10,24 10,24 10,24 10,24 0.
