نوع مقاله : مقاله پژوهشی
نویسندگان
1 کارشناسی ارشد دانشگاه تربیت مدرس
2 استادیار دانشگاه تربیت مدرس
چکیده
کلیدواژهها
عنوان مقاله [English]
Each Channel of the phased array antenna innately has the amplitude and phase errors. The effect of mechanical
errors on the performance of the active phased array antennas is of great importance. In this paper two kinds of me-
chanical errors, namely, antenna structural distortions and random errors in element positions is studied and the rela-
tionship between the electromagnetic performance and the mechanical errors of the antenna is proposed. The me-
chanical errors can create phase errors and reduce the antenna performance, for instance the gain reduction, side-
lobe level increase, and inaccurate beam direction. In order to enhance the performance of the antenna in the pres-
ence of mechanical errors, a phase compensation method for error correction using Particle Swarm Optimization
(PSO) is proposed. The simulation results show that the proposed method can greatly correct the phase errors and
after correction the overall radiation pattern is recovered close to ideal radiation pattern without error.
کلیدواژهها [English]