Performance Characterization of an Active Phased Array Antenna by Simultaneously Measuring the Radiation Pattern and the Error Vector Magnitude
M. L. Iványi (Microwave Sensing, Signals & Systems)
G. Chirico (University of Cassino and Southern Lazio)
Y. Aslan (Microwave Sensing, Signals & Systems)
A. Yarovoy (Microwave Sensing, Signals & Systems)
M. Spirito (TU Delft - Electrical Engineering, Mathematics and Computer Science)
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Abstract
A novel over-the-air (OTA) measurement setup for simultaneous and near-real-time characterization and mapping of the phased array radiation patterns to the error-vector-magnitude (EVM) is introduced. A cost-effective software-defined radio (SDR) system, including a Pluto SDR for both transmission and reception, is employed. For setup demonstration, the performance of a 4 × 4 active phased array antenna (APAA) is studied at 26.5 GHz. Calibration of the transmitter results in an EVM of 0.5%, proving the accuracy of the measurement system. The over-the-air measured EVM of the APAA is 1.2%. The proposed setup and approach provide deep insights into how array radiation characteristics affect signal quality, advancing the evaluation and development of APAAs for next-generation wireless communication systems.