Abstract
It is suggested that the asymptotic method of saddle point be used for solution of integral electrodynamic equations of the electromagnetic field scattered by phased equidistant antenna arrays. This makes it possible to study the regularities of the re-radiated field in two arbitrary planes.The obtained expressions will contribute to design of new antenna systems, which will reduce electromagnetic field scattering. This will as well improve the electromagnetic compatibility of electronic equipment installed in the same or in adjacent objects equipped with antenna systems.The research results can be used to design algorithms for detection, recognition and identification of radar targets.
Highlights
The study of electromagnetic field scattering characteristics caused by air and ground objects is important for radio detection and navigation
Let the electromagnetic wave E⃗f, H⃗ f which is formed by external currents distributed with density ⃗j and m⃗ be incident to the phased antenna arrays (PAA) aperture consisting from n horn-type radiator linear arrays
The application of asymptotic methods of electrodynamics allows us to determine the field scattered from the horn aperture in the case of normal polarization of the incident wave to the plane of incidence, and in the case of coincidence of the plane of incidence and wave polarization
Summary
The study of electromagnetic field scattering characteristics (re-radiation) caused by air and ground objects is important for radio detection and navigation. Sometimes it means "radar visibility"of the objects. The antenna systems of air and ground objects are the largest contributors to their radar visibility They are the main sources of follow-up radiation or re-radiation of electromagnetic waves from the probing radar stations (RS). According to a number of sources [1,2,3,4,5], the contribution of antenna systems can be up to 98% of the total effective scattering surface (ESS) of the objects. This is especially true of aperture antennas and phased antenna arrays (PAA) of RS [5,6,7]
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