Properties and technical applications of antenna arrays focused on a broadband signal

Abstract

Background. Currently, antenna arrays focused in the near-radiated field zone are being actively studied. The basic properties and characteristics of focused antenna systems using narrowband signals are known. It is possible to expand the technical capabilities of devices using focused electromagnetic fields through the use of broadband signals. This article is devoted to a description of the properties and a number of technical applications of antenna arrays focused in the near-radiated field zone using a broadband signal. Aim. The main aim of this article is to describe the basic properties of focused broadband electromagnetic fields and develop practical application options based on them. Methods. Achieving the goal of the article is due to the use of well-known principles of electrodynamics and aperture theory of antennas. Results. The features of the formation of focused broadband electromagnetic fields are shown and their main properties are given. Options for the technical application of focused broadband antennas in radio communication and direction finding tasks are proposed. Conclusion. The results obtained confirm the importance of assessing the properties of broadband focused antennas and developing a number of technical proposals based on them