REQUIRED NUMBER OF ELEMENTS FOR A RING ANTENNA ARRAY
V. P. Yushchenko, S. A. Litvinenko, R. A. Moseychuk, A. D. Ivanova
Novosibirsk State Technical University, Novosibirsk, Russia
Keywords: annular antenna array, focusing of a monochromatic signal, scanning control of the focus position, image reconstruction using a scanning focus, antenna array from a ring segment
Abstract
The influence of the number of elements of the ring antenna array on the quality of focusing the wave inside the ring and the ability to control the focus location is investigated. Controlled focusing is supposed to be used to scan the internal structure of the patient with a controlled focus for tomography or delivery of ultrasonic energy to a given area of the patient's body. The research is carried out by mathematical modeling. The simulation results show that thinning of the number of elements on the annular antenna array leads to the formation of interference rings in the area of focus image reconstruction. At the same time, the size of the focal spot remains unchanged.
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