Abstract
Using spectral energy equations of transmission-reception of wave processes in radio channel with scattering on object and direct radio channel, analysis of energy ratios of information signals and active masking interference at inputs of receivers of remote monitoring systems is carried out. Measures to reduce visibility are aimed at changing the reflective signatures of objects in the interests of reducing the de-masking features contained in secondary electromagnetic radiation to limits that exclude the performance of radar monitoring tasks at established distances and time intervals. Active interference is designed to mask information signals in receiving channels of radar at power that does not allow detecting their designers by passive radar. In case of joint application of not iceability reducing devices and active jammers, radar range reducing coefficient is determined by product of coefficient characterizing possibility of autonomous masking of information signals and coefficient achievable due to reduction of secondary electromagnetic radiation power in the second degree. The laws of increase of aircraft stealth from radar observation with joint application of technologies of reduction of radar visibility and masking by intentional interference created from sides of protected objects and from assigned points have been investigated. In order to maintain the desired signal-to-noise ratio at the output of the receiver with a decrease in the duration of the probing signal, it is necessary to proportionally increase the density of the emitted energy. With given antenna sizes, the maximum signal transmission range is proportional to the root square of their cyclic carrier frequency; increase of this parameter leads to increase of partial coefficient of directional action and effective area of antenna. With a decrease in the cyclic frequency of the carrier of the probing signal, inorder to maintain the required directional properties of the antennas, it is necessary to increase their dimensions.
Highlights
Энергетические характеристики направленности антенн и антенных систем при излучении и приеме сверхширокополосных сигналов и сверхкоротких импульсов // Антенны. 2002
Может быть полезна преподавателям вузов, докторантам, аспирантам и студентам старших курсов соответствующих специальностей
Summary
ВУНЦ ВВС «Военно-воздушная академия имени профессора Н.Е. Жуковского и Ю.А. Активные помехи предназначены для маскировки информационных сигналов в приемных каналах радиолокаторов при мощности, не позволяющей выявлять их постановщики средствами пассивной радиолокации. При совместном применении средств снижения заметности и постановщиков активных помех коэффициент уменьшения дальности действия радиолокатора определяется произведением коэффициента, характеризующего возможности автономной маскировки информационных сигналов, и коэффициента, достижимого за счет уменьшения мощности вторичного электромагнитного излучения, во второй степени. Снижения заметности и постановщиков активных помех коэффициент уменьшения дальности действия радиолокатора определяется произведением коэффициента, характеризующего возможности автономной маскировки информационных сигналов, и коэффициента, достижимого за счет уменьшения мощности вторичного электромагнитного излучения, во второй степени [3].
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