Precision Millimeter-Wave Modulated Wideband Source for Over-The-Air Reference at 92.4 GHz
Paritosh Manurkar, Robert D. Horansky, Benjamin F. Jamroz, Jeffrey A. Jargon, Dylan F. Williams, Catherine A. Remley
As the next generation communications technology continues to evolve to utilize millimeter-wave frequencies, calibration methods are needed for the nonidealities related to these frequencies in communications electronics. In this work, we demonstrate a 1-GHz bandwidth, 64-quadrature- amplitude-modulated signal source at 92.4 GHz carrier frequency with relative phase and magnitude that may be made traceable to primary standards. By using predistortion techniques, we are able to repeatably obtain a nominal error vector magnitude (EVM) of 1.4%. Additionally, we track correlated and uncorrelated uncertainties using a Monte Carlo method to show the distribution of uncertainty of the EVM measurement in the range of 1.5%--3.1%. We examine the dependence of the EVM in the traceable source on digital-to-analog converters' imbalance and system drift over time. Finally, we use the stable, low-EVM signal to ascertain EVM degradation on- and off-axis in an over-the-air setup.
IEEE Transactions on Microwave Theory and Techniques
, Horansky, R.
, Jamroz, B.
, Jargon, J.
, Williams, D.
and Remley, C.
Precision Millimeter-Wave Modulated Wideband Source for Over-The-Air Reference at 92.4 GHz, IEEE Transactions on Microwave Theory and Techniques, [online], https://doi.org/10.1109/TMTT.2020.2983144
(Accessed May 25, 2022)