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access icon free Measurement uncertainty of RC and its reduction techniques for OTA tests: a review

© The Institution of Engineering and Technology
Received 14/11/2018, Accepted 30/04/2019, Revised 11/01/2019, Published 01/05/2019

The emerging machine-to-machine (M2M) communications and Internet-of-things techniques bring new challenges in over-the-air (OTA) tests. The inexpensive M2M device usually aims at low-cost and low-power consumption rather than high data rate and, therefore, is usually equipped with a single antenna. Testing such M2M device in massive production requires efficient and cost-effective OTA techniques. The reverberation chamber (RC) is a suitable solution for such tests of M2M (especially large-form-factor) devices. Since RC measurements are in essence stochastic measurements (with repeatable results), uncertainty analyses are of primary importance. This study gives an overview of the start-of-the-art research on measurement uncertainty for both conventional and M2M OTA applications. In addition, new results about mode stirrers and diffusers (for uncertainty reduction) are provided.

Inspec keywords: measurement uncertainty; operational amplifiers; reverberation chambers

Other keywords: reduction techniques; conventional M2M OTA applications; Internet-of-things techniques; measurement uncertainty; high data rate; single antenna; RC measurements; reverberation chamber; essence stochastic measurements; cost-effective OTA techniques; low-cost; especially large-form-factor; massive production; uncertainty analyses; over-the-air tests; M2M devices; OTA tests; uncertainty reduction; machine-to-machine communications; low-power consumption; inexpensive M2M device; suitable solution

Subjects: Electromagnetic compatibility and interference; Radio links and equipment; Amplifiers

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