The Role of Filtering Higher Order Reflections in Antenna Extrapolation Measurements

Published

September 30, 2017

Author(s)

Rob Horansky, Mohit S. Mujumdar, Dylan Williams, Kate Remley, David R. Novotny, Michael H. Francis

Abstract

With more and more wireless devices being made with no test ports, and with the need to test these devices in real-world scenarios with no cable interference, over-the-air (OTA) testing has been dominating the test and manufacture industry. At NIST, we are developing a free- field, modulated signal traceable to primary standards that will be used for calibrating OTA testing for both single and multiple input-output cases. To provide this vector signal traceability into the free-field, we are extending the three-antenna, extrapolation method used for on-axis antenna gain, from using only scalar data, to using the full magnitude and phase information between the antennas. We have examined several aspects of the extrapolation fitting, and will present our simulation result showing that filtering of higher order reflections between antennas is an unnecessary step in the extrapolation method.

Proceedings Title

36th Annual Symposium of the Antenna Measurement Techniques Association (AMTA)

Conference Dates

October 15-20, 2017

Conference Location

Atlanta, GA, US

Pub Type

Conferences

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Keywords

Modulated Signal, Extrapolation Method, Three-Antenna Method, Filtering

Citation

Horansky, R. , Mujumdar, M. , Williams, D. , Remley, K. , Novotny, D. and Francis, M. (2017), The Role of Filtering Higher Order Reflections in Antenna Extrapolation Measurements, 36th Annual Symposium of the Antenna Measurement Techniques Association (AMTA), Atlanta, GA, US, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=923926 (Accessed October 8, 2025)