Correction of hardware amplitude-phase distortions in phased antenna arrays
An algorithm for improving the accuracy of radiation pattern synthesis for phased antenna arrays by correcting hardware distortions of control elements is described. It is demonstrated that digital attenuators and phase shifters in a cascade connection introduce significant errors, in particular, a phase shift of up to 60° not associated with the phase shifter operation. The proposed compensation method is based on a calculated calibration look-up table, formed from experimental measurement results. Instead of independent selection of control codes, the algorithm searches for their optimal pair that minimizes the error for the amplitude-phase distribution. The effectiveness of the approach is verified by electrodynamic modeling. It is shown that the proposed correction makes it possible to reduce the maximum side lobe level of the synthesized radiation pattern by 3.4 dB, which is of practical interest for antenna system design.
Keywords
phased array antenna,
amplitude-phase distribution,
electromagnetic modeling,
phase shifters,
attenuatorsAuthors
| Dimov Maxim A. | Tomsk State University | nasa300@mail.ru |
| Shipilov Sergey E. | Tomsk State University | shipilov@tsu.ru |
| Tseplyaev Ilya S. | Tomsk State University | narwayn@gmail.com |
| Zear Aung | Tomsk State University | zayaraung53@gmail.com |
Всего: 4
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