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Figure 9: Phase linearity measurement: a) (left) for each antenna in the array, and b) (right) ACLR measurement for the H-polarization using the radiating near-field OTA setup.
measurement example in Figure 9b testing in some circumstances. We have technical contributions to this project. We
is of an adjacent channel leakage ratio shown that parametric measurements can would also like to thank Prof. Jan Hesselbarth
(ACLR) measurement with all antennas be done in the radiating near field if careful from the University of Stuttgart for his
transmitting in a beam-forming mode. attention is paid on the measurement antenna continuing collaboration on OTA testing.
There are several other possible design and also on the choice of the distance
measurements that can be done in an between the DUT and the measurement References
OTA measurement setup. As a general antenna. In the radiating near-field case 1. J. Moreira, “Testing AiP modules
guideline, almost all the measurements we a straightforward value correlation is not in high-volume production for 5G
can do in a conductive mmWave testing always possible with the far field. But in a applications,” Chip Scale Review,
(e.g., at wafer level) can be done at OTA. production setup, the important task is to be May/June 2020.
It is clear that the radiating near- able to differentiate good from bad devices, 2. K-L. Wong, Compact and BroadBand
field OTA measurement setup presents and that is achievable with a radiating near- Microstrip Antennas, Wiley, 2002.
significantly more complex correlation field OTA configuration. As shown in 3. C. Zwenger, V. Chaudhry, “Antenna
challenges than a far-field OTA setup. But [1], the radiating near field has significant in package (AiP) technology for 5G
the critical point of a radiating near-field advantages for high-volume production in growth,“ Chip Scale Review March/
OTA measurement setup is its simplicity terms of complexity and cost. Finally, in this April, 2020.
and mechanical dimensions. It is very article we did not present the correlation to 4. M. Kottkamp, et al., 5G New Radio
close to a standard ATE socket, which the reactive near-field OTA approach due to Fundamentals, Procedures, Testing
means it can be easily incorporated into size constraints, but Advantest will present Aspects, Rohde & Schwarz.
a multi-site standard ATE test cell. This this topic in the future. 5. J. Moreira, J. Hesselbarth, K.
makes its cost of test much lower than a Dabrowiecki, “Challenges of over
far-field OTA setup. Acknowledgements the air (OTA) testing with ATE,”
We would like to thank Sui-Xia Yang TestConX China, Shanghai, Oct. 29,
Summary and Frank Goh from Advantest for the 2019.
OTA testing with ATE is possible in test program development and also for the 6. C. Parini, et al., “Theory and
different configurations: in the far field, measurements execution. We would also like practice of modern antenna range
radiating near field, and reactive near field to thank Natsuki Shiota, Aritomo Kikuchi, measurements,” IET 2014.
as described in [1]. An OTA loopback Hiromitsu Takasu, Hiroyuki Mineo, and
configuration can also be possible for OTA Yasuyuki Kato from Advantest for their

Biography
Jose Moreira is a Senior R&D Staff Engineer at Advantest in Böblingen, Germany. He focuses on testing
high-speed digital, silicon photonics, and 5G mmWave devices and holds an MS degree in Electrical and
Computer Engineering from the Instituto Superior Técnico, Lisbon U., Portugal. He is a senior member of
the IEEE, technical member of the IEEE P370 standard and co-author of the book An Engineer’s Guide to
Automated Testing of High-Speed Digital Interfaces. Email jose.moreira@advantest.com

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