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Keysight Technologies
Increase Multi-Antenna
Array Test Throughput with the
M9703A AXIe Digitizer



                            Application Note




        Abstract
        Smart antenna architectures incorporating multiple antenna elements in an array
        are used in many applications. Wireless communications standards like 802.11ac,
        radio astronomy and array RADARs are all examples of applications where multiple
        antennas are employed for various requirements derived from spatial signal pro-
        cessing. Though the types of processing used and beamforming techniques differ
        by application, there is a common test challenge. It is difficult to align the antennas
        in an array in phase and amplitude so they can be used together effectively. As the
        number of antennas increase in an array, the test time to do the alignment increases
        drastically. This application note addresses the challenge of aligning the antennas
        in an array precisely, while reducing test time. The note also provides details on a
        multichannel, phase coherent test solution which can be customized to quickly and
        precisely align antenna elements in an active array, both in phase and amplitude.
        This test solution is built from modular components and is easily scalable to the
        number of antennas in the array being tested. Further, it provides parallelism to the
        test process to increase test throughput. The test system described offers flexibility
        to provide good sensitivity in both the wideband and narrowband measurement
        scenarios using the same hardware.
02 | Keysight | Increase Multi-Antenna Array Test Throughput with the M9703A AXIe Digitizer 

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