Multi-Axis Positioning System MAPS-3500
Model MAPS-3500 is an important upgrade to consider for 5G mmWave RF testing. Wanted and unwanted transmissions in this frequency range are very narrow and highly directional, necessitating calculations of measurement grid points and far field distances for each device to be tested. Before undertaking the radio conformance or spurious emissions tests, substantial exploration to find the beam peak and test beam locking functionality is necessary. The standards dictate a 3D spherical test grid surrounding the DUT with closely spaced measurement points calculated to capture narrow and directional emissions. Large turntables and 4 meter antenna masts common to radiated emissions test chambers may not have the positioning accuracy necessary and cannot maintain a constant range length between the measurement antenna and DUT. Instead of physically moving the measurement antenna, the MAPS 3500 rotates the DUT, vastly saving time while improving accuracy. Model MAPS-3500 is a mobile platform, using retractable casters for movement in and out of the test chamber.
Keeping the measurement antenna stationary greatly simplifies the RF path and dramatically improves the dynamic range and noise floor performance of the measurement system. It also cuts down on the wear and tear of fragile signal path connectors.
3D rendering of MAPS-3500 needed
TILE! Test Package for mmWave RSE: TTP-3500
System automation is achieved with ETS-Lindgren's instrumentation agnostic TILE! software. A special test package for mmWave RF measurements extends TILE! to enable 5GNR and LTE anchor signals from a communication tester. Since transmitter and RSE tests are written as a "black box" test (i.e. no specialized control of device is assumed or required) the transmitter modes dictated by the test standard are signaled to the device over the air via an active communication and control link. Unique to the industry, TTP-3500 supports a number of communications tester solutions for LTE and 5G NR. This test package also adds support for the MAPS-3500 device positioner and the AAA-3500 antenna array as well as driving traditional turntable and mast positioning systems. Most well-known signal analyzer brands are supported by TILE! and new drivers are continuously being added. TILE! includes calibration and chamber verification tools that utilize a microwave signal generator to supply substitution signals.
Automated Antenna Array AAA-3500
The automated antenna array AAA-3500 can be a game changer for the efficiency of this battery of tests. The radiated spurious emissions portion of the RF tests will require about 10 antenna changes inside the chamber. From 40 GHz to 220 GHz requires four antenna changes, five if extended to 330 GHz. Each antenna must be rotated for horizontal and vertical polarizations, and the mmWave range will have both waveguide and coax connections to manage. Without automation, extensive manual labor, with the resulting potential for human error is inherently required. Even more expensive than the labor considerations of all this handling is the high amount of wear and tear added to the fragile connectors, cables, and waveguide mating surfaces. Model AAA-3500 cuts out the human expense of handling all these antenna changes and takes wear and tear down to nearly zero by combining all the signal path items with a single stable RF path output. Like the mobile MAPS-3500 cart, the automated antenna array has near universal upgrade potential for radiated emissions capable chambers. Model AAA-3500 mounts the antennas, frequency converters, waveguide and coax cables, H/V polarization motors, and path switching on a mobile platform. Horn antennas starting at 1 GHz can be mounted on this platform, automating an even greater portion of the spectrum. Signal conditioning items such as filters and amplifiers can be added as well, making this array a comprehensive solution from 1 to 330 GHz.