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Overhead Theta Axis Systems - NSI-MI
The Overhead Theta Axis system is ideal for measuring medium and low gain vertically oriented antennas up to 7.3 m (24 ft) in diameter. The DUT mounts to a lower azimuth stage, while a probe moves along a fixed arch or moving gantry to generate a partial sphere around the DUT. This system type reduces the gravitational sensitivities observed with the more common Roll over Azimuth geometry. This implementation also has the added benefit of greatly simplifying the challenges associated with cable management since cabling to the DUT only needs to pass through a single rotary axis.
More Details
Swing arm-over-azimuth systems are ideal system for measuring medium and low gain antennas up to 7.3 m (24 ft) in diameter. They are also well suited to perform testing of standalone antennas that fit inside this dimensional envelope.
Features
- Scan area 360° roll and 360° to 95° in azimuth
- L-band to mmWave measurements
- Automatic electronic alignment capability
- Far-field, near-field, and holographic patterns
- Far-field measurement options available
Arch-over-Azimuth Scanner Systems: Spherical scanning is accomplished by rotating the antenna-under-test (AUT) on an azimuth positioning system while elevation scans are accomplished using a near-field probe mounted on the arch carriage. Phase and amplitude data is collected as the AUT rotates.
Features
- Ideal for spherical near-field antenna measurements
- Up to 10 m (33 ft) scan radius
- ± .005° angular position accuracy
- 0.05 mm (0.002 in.) RMS radial accuracy
- 90°, 115°, 135°, and 180° versions
- Capable of handling a wide range of antennas from 0.1 - 140.0 GHz
