Antennas, focused in the near radiated field zone. Features and technical application

Vedenkin, Denis; Potapova, O. V.; Sedelnikov, Yu.E.

doi:10.1109/icatt.2013.6650847

Cited by 7 publications

(5 citation statements)

References 4 publications

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“…In conclusion, we note that in this work only brief information about the most essential properties of antennas focused in the near radiated field zone is given. More information can be found in the book [12].…”

Section: Discussionmentioning

confidence: 99%

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Increasing the Accuracy Characteristics of Focused Electromagnetic Devices for Non-Destructive Testing and Technical Diagnostics by Implementing Sum–Difference Signal Processing

et al. 2023

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Nowadays, the classical aperture theory is supplemented by data on the properties of electromagnetic fields in the near radiated field zone. A fundamental feature of the functioning of antennas in this area is the possibility of spatial focusing of electromagnetic energy. In this case, it is possible to realize the maximum field strength at a given point in space and reduce the field strength outside this point. The focusing effect itself is provided by the in-phase addition of fields from elementary sources. Also, in addition to the formation of the maximum field strength at the focusing point, it is also possible to realize a minimum field strength at the focusing point by implementing antiphase addition of partial fields at the focusing point. The fundamental possibility of forming sum and difference amplitude distributions of electromagnetic fields in the near radiated field zone makes it possible to realize sum–difference signal processing in order to reduce the level of the secondary maximum of the focused field. This article discusses the features of the formation of the sum and difference amplitude distributions and the principles of the sum–difference processing of focused electromagnetic fields, along with the implementation of technical solutions for non-destructive testing and technical diagnostic tasks.

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Section: Discussionmentioning

confidence: 99%

“…Focused antennas were first studied in [11] and further considered in a number of papers. Detailed results can be found in the book [12]. Below is an enumeration of the most important properties of focused fields at the near radiated field zone.…”

Section: Properties Of Electromagnetic Fields In the Near Radiated Fi...mentioning

confidence: 99%

Increasing the Accuracy Characteristics of Focused Electromagnetic Devices for Non-Destructive Testing and Technical Diagnostics by Implementing Sum–Difference Signal Processing

et al. 2023

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“…This method is based on the known position of electrodynamics about the different nature of changes in the electromagnetic field strength in the near and far zones [1,4,5,10,11]. The components of the electric field vector emitted by the electric dipole p in spherical coordinates are determined by the expressions:…”

Section: Fig 1 the Main Stages Of The Process Of Identifying Technimentioning

confidence: 99%

Methods for Assessment and Forecasting of Electromagnetic Radiation Levels in Urban Environments

Bakhtiiarov

Lavrynenko

Lishchynovska

et al. 2021

IAPGOS

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Methods for synthesis a structural diagram of the processes for detecting and locating technical information leakage channels are analysed. Software for defining a controlled room zone was also presented. A proprietary approach to search the electromagnetic environment under radio interference has been developed to detect devices for unauthorized control of acoustic information using microphones and transmission of this information using a radio channel.

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“…The ability to focus the radiation of the electromagnetic field in a certain region of space opens up a number of antenna technology capabilities. The task of building apertures focused, the purpose of operation and properties evaluation was in aim of many papers, for example [7], [8].…”

Section: Antenna Arraysmentioning

confidence: 99%

Antenna Arrays Focused on Broadband Signals

Vedenkin,

Sedelnikov,

Nasybullin

2016

JTIT

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Broadband and ultra-wideband signals are increasingly used in modern radio systems. Traditional performance of evaluation antennas operating with narrowband signals are not always adequately reflect the characteristics of broadband antennas, at least in view of the frequency dependence of the antenna pattern. Accounting for broadband signals the antennas becomes important in the low-frequency range of the spectrum. Systems using these types of signals may include control of the atmosphere and measuring its frequency-selective properties in the range meter and decameter wavelengths. Possibility of spatial selection based on focusing of broadband signals in this case promises to implement a number of additional features. Therefore, it is important to evaluate the properties of antennas based on the spectral content of the signal, as well as taking into account the ways of its processing in the receiving equipment. Consideration features of functioning the antenna array, focused on broadband signal is devoted to this article.

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Antennas, focused in the near radiated field zone. Features and technical application

Cited by 7 publications

References 4 publications

Increasing the Accuracy Characteristics of Focused Electromagnetic Devices for Non-Destructive Testing and Technical Diagnostics by Implementing Sum–Difference Signal Processing

Increasing the Accuracy Characteristics of Focused Electromagnetic Devices for Non-Destructive Testing and Technical Diagnostics by Implementing Sum–Difference Signal Processing

Methods for Assessment and Forecasting of Electromagnetic Radiation Levels in Urban Environments

Antenna Arrays Focused on Broadband Signals

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