Results: **24**

#### On the question of increasing the range properties of an asymmetric vibrator

The work relates to the field of applied electrodynamics and is devoted to improving antenna-feeder devices of communication means. The article attempts to justify one of the ways to expand the range properties of a short-wave pin **antenna** by creating conditions for constant wave resistance along the **antenna**. The authors propose a physical model of an asymmetric vibrator that allows us to determine the set of measures necessary to obtain an **antenna** design with improved range properties....

#### A dipole **antenna** with a modified fractal structure of the «Sierpinski triangle» type

The article is devoted to the development and investigation of a modified **antenna** with an extended frequency range constructed on the basis of a fractal structure of the «Sierpinski triangle» type, which allows to significantly reduce the dimensions of the structure.
1. Stutzman W. L., Tiele G. A. **Antenna** Theory and Design....

#### Dipole **antenna** with stabilized input impedance

The article is devoted to the development of a small-sized **antenna** system characterized by uniform input impedance over the entire operating frequency range, and structurally implemented on the basis of the fractal structure, as well as the optimization of its parameters in order to improve the basic operational ...

#### A receiving-transmitting **antenna** system of a mobile object

The article is devoted to the development of the structure and functional nodes of a short-wave range of a transmit-receive **antenna** with a controlled radiation pattern. The ways of solving the problem of electromagnetic compatibility of radio electronic means located in a limited volume on the surface of the mobile object and integrating the **antenna** into the flat surfaces ...

#### On the possibility of improving the physical parameters of the receiving and transmitting **antenna** system

The paper considers ways to improve antenna-feeder devices in order to improve their weight and size characteristics, which is most important in order to ensure communication with remote mobile objects. Giving a certain configuration to the **antenna** vibrators while using several coplanar lines and ensuring the joint operation of several **antenna** emitters allows you to significantly reduce the overall size of the structure while ensuring high power output. The construction of a radio frequency ...

#### Model researches of a single-mirror **antenna** with a dual-band log-periodic irradiator directional properties in MathCAD

The results of single-mirror **antenna** with a dual-band log-periodic irradiator geometric parameters optimization and model researches of it’s range properties in MathCAD are presented in this article. The model of the mirror **antenna** radiation field used by the authors is based ...

#### A. About the method of optimizing the parameters of **antenna** systems

The article is devoted to the development of methods for optimizing the structural parameters of **antenna** systems, performed in order to improve the basic performance characteristics. Models are considered and estimated calculations are carried out for structures implemented using symmetric vibrators. Conclusions about the feasibility of changing ...

#### Receiving **antenna** system of a mobile object

The article describes the development of the structure and functional nodes of the receiving **antenna** of the short-wave range for moving objects. The authors define the ways to solve the problem of improving the range properties, increasing the sensitivity of the radio reception and ensuring the electromagnetic compatibility of radio electronic ...

#### Model studies of the optimization procedure for the design parameters of the log-periodic C-band **antenna**

An optimization procedure for constructive parameters of the log-periodic C-band **antenna** developed in the patent No. 2571607 “Microstrip logoperiodic **antenna**” is investigated. The electrodynamic model of the log-periodic microstrip- type **antenna** for the C-band has been developed.
1. Петров Б. М. Логопериодические ...

#### The transmitting **antenna** system of moving object

Presents the development of the transmitting **antenna** system has advantages when used in a ship: the constancy of the **antenna** current is independent of the operating frequency, reduced size and weight, reduce the impact of radiation on the electromagnetic environment of the ship, simplifying the ...

#### Way of shortening the inclusion of **antennas** of the transducer of the impedance shoulder vibrator

A method is proposed shortening of vibrator **antenna**. Capacitive reactance is compensated offset by the inclusion of the extension of the inductance coil in the shoulders vibrator. This interpretation of the short tape **antenna** gives the opportunity to increase the power of the radiation virtually ...

#### A shortwave **antenna** module

This article presents the methods to improve the weight and size charac-teristics of a universal transmitting shortwave radio **antenna**. The proposed version of a shortened **antenna** with a performance management system can significantly increase the radiation power provided the inductive element is of high quality and losses are minimal.
1. Гончаренко И. В. Антенны ...

#### Ship frequency independent **antenna** of the VHF band

The article is devoted to the development of small-sized **antenna** systems to ensure stable radio communication on ships in a complex electromagnetic environment, when a large number of radio-electronic devices must be located in a limited area of the deck space. The proposed **antenna** structures have positive ...

#### Optimization of parameters of **antenna** systems for radiofrequency irradiation of polycrystalline compounds

This work is related to the field of applied electrodynamics and is devoted to the improvement of transmitting **antenna** systems used in radio frequency methods of substance research. The operation of search and other devices in remote mode imposes certain conditions on the parameters of transmitting contours, which must be taken into account when building them....

#### Ship transmitting **antenna** system

The article is devoted to the development of a transmitting **antenna** system, characterized by an increased coefficient of the traveling current wave, realizing one of the ways to create phased **antenna** arrays of the short wave and ultrashort wave bands, in the conditions of the limited surface of their placement ...

#### Employment of the method of equivalent circuits to investigate a leaky wave **antenna**

The resistive-capacitive electric circuit is obtained to describe the processes of the wave transmission and of radiation in the **antenna** of leaky wave. The equivalent electric parameters of the circuit are estimated. The system of equations is composed to describe the electric processes in the equivalent circuit To study the balance of the wave power in the **antenna** of leaky wave,...

#### Transmitting **antenna** system for radio frequency methods of substance research

The paper considers the design of the transmitting **antenna** system intended for use in the technique of radio-frequency methods of substance research and justifies its advantages. It is advisable to use the device when studying objects located outside the receiving and transmitting circuits. At the ...

#### Improving the design of low-frequency transmitting **antenna** systems

The requirements for medium-and long-wave **antenna** systems imply further improvement of their electrodynamic and structural properties, which is primarily related to the specifics of using this range to provide communication with mobile objects, including surface ships, radio broadcasting, transmit ...

#### About opportunity of integration of **antenna** systems into bearing constructive elements of mobile objects

Possibility of use in **antenna** systems of an additional dielectric layer is considered. At the expense of use of the phenomenon of «shortening» of an electromagnetic wave in environments with high dielectric permeability there is a possibility of creation of the integrated ...

#### Search on a regime of processing of leaky wave **antenna**

An expression for the radiated power through the slit of the constructed system leaky wave **antenna** is obtained. The equation of balance of power in the waveguide is evolved. The loss of the wave power from the waveguide through the slit is taken into account. To calculate the damping factor, the equation is obtained. The possibility of an approximate ...

#### Optimization of the parameters of transmitting **antenna** systems of the SDV- and DV-bands

This work is related to the field of radio engineering and is devoted to the search for ways to improve the transmission **antennas** of the SDV- and DV- bands based on the study of electrodynamic properties with the possibility of improving their design, mass-dimensional and radiating parameters. These ranges are widely used for communication with mobile objects in areas with ...

#### About radio station with reverse connect in duplex regime

On the basis of the analysis of principles of duplex system, the model of radio system with reverse connect is obtained. It provide the work of ten duplex channels on one frequency at one **antenna** in programmable regime of radio-station frequency change.
1.
Гроднев И. И., Верник С. М.
Линии связи. М., 1992.
2.
Лукьянов Ю. М., Пониматкин В. Е., Шпилевой А. А.
Заявка ...

#### The decision of the problem of definition of angular coordinates of object by the method of the maximum credibility

... location systems is presented. It is based on positions of the theory of optimum reception. As the accepted message dependence of pressure on an exit radar-tracking the receiver from a corner of scanning is used by the diagramme of an orientation of **antenna** system. Theoretical positions and results of preliminary modeling calculations are resulted. Possibility of increase in the azimuthal permission of two purposes without change of spatial base of a signal is shown.
1.
Перов А.
И.
Статистическая ...

#### About radio transmit system work control on radiation

On the basis of the analysis of principles of **antennas**’ system work on radiation the way of their operative emergency definition taken as a principle the developed device is developed. Introduction of a quantitative estimation of transmit system efficacy, will allow to solve a problem of automatic ...