Study on the Beam Pattern Correction in Transmitting Near-Field Measurements of a Digital Multi-Function Radar
Year: 2020
Type: article
Abstract: Leakage signals, inevitably generated during near-field measurement of a digital radar, affect the measured data samples. Although each leakage signal occurs at a very low level, the signals accumulate and have a significant effect when the measured near-field converts into a far-field beam pattern. In this study, we verified a method that effectively eliminates the leakage signals through back projection from the near-field data. In the simulation, the difference between the characteristics of the noise and leakage signal was examined, and the near-field measurement signal was simulated with mathematical modeling. Next, we analyzed the effect of leakage signals on antenna beam patterns in the case of boresight and beam steering. In addition, the leakage signals were extracted from the near-field data and removed using the proposed method, and the results were compared. Finally, the proposed method was applied to the measured data in the near-field test of a digital multi-function radar similar to the simulation, and the results of the leakage correction are presented.
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W3010742837