2000, volume 5, № 1

THE VERTICAL ELECTRIC DIPOL FIELD IN THE PRESENCE OF A SPHERE WITH A CIRCULAR APERTURE

Yu. V. Svishchov

7-14

The initial boundary value problem is reduced to the system of linear algebraic equations (I+H)x=b, where l₂, H is a compact operator. The spectra of natural frequencies (which are corresponded to axisymmetric oscillations of electric type) of a sphere with a circular aperture has been calculated. The influence of resonance conditions (in particularly, of transformation modes) of considered structure on its scattering features has been investigated.

ABOUT AN APPROACH TO SOLUTION OF THE PROBLEM OF WAVE SCATTERING ON A SYSTEM OF STRIPS

G. I. Koshevoy

15-19

The problem of scattering the E-polarized plane wave at the system of N noncomplanar ribbons is converted to the system of singular integral equations of the first kind. The approach for transformation this system to the system of the second kind is presented. The obtained system is more convenient for applying numerical methods and obtaining asymptotics. The asymtotical expressions for density of the surface current are adduced in case when the length of the incident wave is large compared to the cross-sectional dimension of ribbons. These expressions allow possible matching with known classic outcomes. The obtained formulas can be directly applied to the calculation of other characteristics and the examination of mutual influence of separate ribbons. 

ABSORPTION OF ENERGY OF A PLANE ELECTROMAGNETIC WAVE BY A FRACTAL CONDUCTING SURFACE

V. M. Onufriyenko

20-23

The integrodifferential characteristics of a component electromagnetic field are applied to the description of an absorption of energy of a plane wave by a fractal conducting surface. Is entered in reviewing complex scaling index, which is applied to calculation of power losses on actual boundary undressed of the environments. The dependence complex scaling index and power of losses from frequency of oscillations and structure of a fractal interface of the environments is investigated. 

AN OPEN RESONATOR WITH A "NOT-FOCUSING" REFLECTOR

P. N. Melezhik

24-30

The analytical regularization method was used to develop a rigorous mathematical model of an open resonator with a "not-focusing" reflector. Its eigen oscillation spectrum was analyzed and it was shown that one resonance with a quite good Q-factor within an octave frequency band can be obtained by a proper selection of geometric parameters of such open resonator. 

MICROWAVE RADIATOR NEAR-FIELD VISUALIZATION BY MEANS OF A VIBRATING STRING

A. Ya. Kirichenko, O. A. Suvorova

31-35

The paper presents a device for examining microwave near field of radiator based on perturbation principle of field by small test body. The metal vibrating string is used as a weekly perturbative body. String oscillation realizes both displasment of test body in the field under cosideration and modulation of measured signal. The device allows to observe in real time the elecrtomagnetic field distribution in free space and to notice the field features that results from change of signal characteristics or peculiarity of radiation system. The possibilities of usage of described device in physical experiments are shown at some examples.

WAVEGUIDE - DIELECTRIC RESONATOR PROPERTIES ON SYMMETRICAL H OSCILLATIONS MODES

R. I. Belous, Yu. G. Makeev, A. P. Motornenko

36-41

Expressions which make it possible to calculate resonance frequencies and Q - factor of WDR based on circular evanescent waveguide with a dielectric element and short - circuit plunger for the case of symmetrical H types of oscillations have been presented. The computer results have been obtained for the basic H₀₁₁ oscillation type depending on sizes of the resonance structure and dielectric parameters in sm and mm bands. A comparison of WDR characteristics of symmetrical H₀₁₁ and asymmetrical H₁₁₁ of oscillations types have been made. 

RADIATION OF A DIPOLE ANTENNA ON THE SURFACE OF PARTIALLY SCREENED LAYERED SPHERE:

AXIALLY SYMMETRIC CASE

V. V. Radchenko, A. I. Nosich, S. S. Vinogradov, J.-P. Daniel

42-48

In this paper, the problem of radiation of a dipole antenna on the surface of partially screened layered dielectric sphere is considered. We present an accurate modeling method based on the usage of analytical regularization which reduces the problem to an infinite-matrix equation of the Fredholm second kind. Efficient numerical algorithm is presented. Numerical results for some basic antenna characteristics are demonstrated. 

NUMERICAL ANALYSIS OF A DIELECTRIC DISK ANTENNA

N. Yu. Bliznyuk, A. I. Nosich

49-54

In the design of microstrip monolithic integrated circuits and millimeter-wave printed antennas, accurate numerical modeling becomes important as the operating frequency becomes higher. Besides of metallic patches, dielectric antennas are actively studied as alternative radiating elements. Our solution of the scattering by a circular dielectric patch is based on the Method of Regularization combined with the Galerkin’s Method, in the Hankel-transform domain. This technique has a controlled accuracy in the resonant range, and a much smaller matrix size in comparison to solutions obtained by direct applications of the Method of Moments. 

DEVELOPMENT OF A TECHNIQUE FOR A RADIOWAVE CONTROL OF PARAMETERS OF PHYSICAL STATE OF MEDIA, FUNCTIONAL MATERIALS AND COATINGS ON THE BASIS OF SLIT TYPE RESONANCE FRAMES

V. N. Koshpare`nok, Yu. V. Majstrenko

55-60

The operation is devoted to development of the practical applications of the theory of an electromagnetic interaction of internal fields of open slit type lines and resonators with boundary in layers of physical environments, dielectric materials and coatings. Is obtained and is numerical the secular equation circumscribing electromagnetic interaction of the barrel with a longitudinal slot with a demarcation of two environments is parsed. The current-wave-length characteristics of the system for some actual functional materials are reduced. 

CALCULATION OF LOOP ANTENNAS WITH REACTIVE LOADS

V. V. Ovsianikov

61-63

The method of evaluation of principal features of the loop small sized and broad band loop antennas with the reactive loads is proposed. These antennas may be used in the devices of mobile radio communication. The synthesis of the reactive loads and its approximate evaluation of the input impedance is carried out by means of equivalent line and superposition. 

METHODS OF CALCULATING THE THERMAL REGIME OF THIN-WALL MICROWAVE TRANSMISSION LINES

Vl. M. Volkov

64-71

One of the actual modern radiophisics tasks is considered in the article - the most effective microwave thin-wall waveguide heating research methods analysis. One of the mismatch 120 - 57 mm² waveguide with H₁₀ and average power 20 kW constantan 20 mm narrow wall static temperature field determination practical tasks was solved. There are Fourier method, Laplace transforms, variational, numerical and finite integral transforms. The achivement and drawback of each of them was given, that is necessary take into consideration in passing power sensor optimal design. 

AN AVERAGE ELECTROMAGNETIC FIELD SCATTERED BY STATISTICALLY ROUGH WALLS OF A SPHERICAL WAVEQUIDE

A. S. Bryukhovetski

72-76

Using Bourret's approximation, the Fourier expansion in the longitudinal operator eigenfunctions for the mean electromagnetic field is determined in spherical wavequide. The statistically rough wavequide walls have small impedances and . The reflection coefficients are calculated for spherical waves in the mean expansion. They are expressed by means of the effective impedance for spherical multipole waves. The transition to the case of solitary sphere, which is studied earlier, is investigated. 

FREQUENCY DEPENDENCIES OF OBJECT SCATTERING MATRIXES IN THE RESONANCE AREA

V. I. Lutsenko, S. U. Tolstel

77-82

The outcomes of experimental researches of frequency depends of matrixes of scattering of wire, plate-like and volumetric models of small-size objects are indicated. The existence of resonance’s stipulated by polarizing effects of mutual overflow of currents vertically and horizontally oriented elements of configuration items is revealed that by selection of a wavelength of an irradiating field approximately twice exceeding the vertical sizes of object results to essential increase it cross-section (RCS) at vertical polarization of radiation and reception, up to sizes, commensurable with RCS of a resonant half-wave dipole. It is necessary to taking into acount this effect for the creation of radars of a ground wave of HF range. Is established, that at horizontal polarization of a field, irradiating the target, and vertical polarization of a reception, RCS of the target has the approximately same size, as well as at horizontal polarization of radiation and reception, and is commensurable with RCS of a resonant dipole. It is necessary to taking into account this effect at creation bistatic radars of HF range with illumination through an ionosphere. 

IMPROVEMENT OF THE EFFICIENCY OF DETECTING THE ABOVE-WATER OBJECTS IN THE NON-COHERENT RADAR

V. A. Kirichenko, V. I. Lutsenko

83-91

The opportunity of the utilization of the radar echo from the waves generated by the moving vessel on the water surface for the radar detection of such vessels are discussed in the paper. This question is actual for the work with the small vessel with high speed because the detection of such objects on the background of the sea clutter is very difficult. 

SCHUMANN RESONANCE AND LIGHTNING STROKES IN MESOSPHERE

A. P. Nickolaenko

92-107

We analyze the electromagnetic radiation of lightning strokes. Its low frequency component increases with an extension of the channel length. This effect is conditioned by finite speed of motion of the current wave along the channel. The motion combined with the bending of the channel (staircase stroke) produce an increase in the number of radiated pulses. Electric field in the vicinity of a stroke rotates itself in longitudinal and transverse directions. Therefore, the electric vector “scans” the sky facilitating a focusing of free charged particles. The effects vanish at the ground surface and in the air right above the stroke. They may be observed in the air at a few kilometers distance from the stroke. A conclusion is made that the strokes causing optical emissions and powerful electromagnetic LF pulses should belong to the staircase lightning strokes, i.e., they must have a great length and multiply bent channel. Finally it is shown that initially multiple pulses radiated by such strokes rapidly become a single waveform when propagating in the Earth-ionosphere duct. Therefore a remote observer cannot resolve single pulses from energetic lightning strokes from the series of pulses produced by staircase strokes. 

ACCELERATING OF THE CONVERGENCE OF THE TIME DOMAIN SOLUTION FOR LIGHTING STROKE ELF PULSES

A. P. Nikolaenko, L. M. Rabinowicz

108-112

The problem had been solved in the time domain of propagation of natural electromagnetic pulse in the Earth-ionosphere cavity. An algorithm is described of accelerating the convergence of the series that present the formal solution for the pulsed waveform. Compact formulae are given for the signals and the computational results are shown for a set of the source-observed distances. 

ELF TOMOGRAPHY FOR THE WORLDWIDE THUNDERSTORM ACTIVITY

A. V. Shvets

113-118

A technique of tomographic reconstruction of the worldwide lightning activity is proposed. The technique is based on measurement of average Schumann Resonance (SR) spectra from different distant receiving stations distributed over the globe. Distance profiles of lightning intensity recovered from average spectra measured at each station are used for tomographic reconstruction. An effective algorithm for tomographic reconstruction has been developed to reduce required computational resources. It is shown that characteristic structure presented by the world thunderstorm centers can be resolved by only few distant optimally placed observation stations. A possibility of reconstruction of global lightning spatial distribution by application data from existing SR field sites is numerically studied. 

ETHER-DRIFT EFFECTS IN ТНЕ EXPERIMENTS ON RADIO WAVE PROPAGATION

Yu. M. Galaev

119-132

Experimental check of the hypothesis on the existence in nature of such material medium as ether has been carried out in the 8-mm radio wave band, by the phase method. The results of systematic measurements correspond to rules of the initial hypothesis and can be considered as experimental acknowledgment of ideas about existence of ether in nature as material medium. 

TEMPERATURE DEPENDENCE OF ELECTRO-ACOUSTIC CONVERSION EFFECT IN HETEROSTRUCTURES WITH A QUANTUM WELL

V. I. Khizhnyi

133-136

For the case of low temperatures the account of temperature dependence of direct linear conversion efficiency of a high-frequency electrical field into a longitudinal acoustic wave for semiconductor heterostructures with a quantum well is carried out. 

RESONANT FREQUENCIES OF AZIMUTHAL - UNIFORM OSCILLATIONS IN ANISOTROPIC SPHERE

Yu. F. Filipov, Z. E. Eremenko

137-141

The single crystal of quartz, ruby, leikosapphire are used for the fabrication of high Q-factor resonators and they have the anisotropy of dielectric permittivity. In this paper are shown the anisotropy of parameters affects only to the resonance oscillations of TM mode. It is carried out the numerical investigation of the obtained characteristic equations for the case of the resonant oscillations with high polar indexes. It is found out the anisotropy affects to the appearance of two TM modes at the given value of the polar index. They have different frequencies, Q-factor, and radial wave vector components. 

INFLUENCE OF THE CAPACITANCE OF p⁺-n-n⁺ n⁺-p-p⁺ GERMANIUM DIODES ON THE RADIATION ABSORPTION

OF 54-78 GHz RANGE

N. A. Shekhovtsov

142-146

For germanium p⁺-n-n⁺ and n⁺-p-p⁺ diodes with a weakly doped n- and p-regions the radiation absorption of 54-78 GHz range is decreasing, or in beginning is increasing and after is decreasing, or the strong increasing of absorption is changing by weak absorption at injection current growth. It was shown, that the changing of radiation absorption dependence upon injection current stipulated in the last two cases by the changing of positive capacitance on negative. 

HOLE-ELECTRON PROCESSES IN THE p⁺-p DIODE

A. N. Shekhovtsov, N. A. Shekhovtsov

147-153

The energy conditions of dynamic equilibrium of p⁺-p junction are determined. The volt-ampere equation of p⁺-p junction and p⁺-p diode is obtained. The dependence of differential capacity of p⁺-p junction and p⁺-p diode upon voltage is obtained. It is shown, that the capacity of p⁺-p junction is changing the sign from positive to negative under the increasing of reverse voltage.

EXPERIMENTAL INVESTIGATION OF THE STATIC PULSATION OF THE STRIP BEAMS IN THE DEVICES

OF THE SHORT-WAVELENGTH PART OF MM RANGE

E. V. Belousov, V. G. Korzh

154-159

The influence of electric field transversal components caused by the features of the cathode unit and observed near the cathode of a diode gun on the level of pulsation of the tape shape beams is investigated in this work. The experimental result of studied dependences of the beam pulsations amplitude from the cathode - anode distance and magnetic field induction are represented. Several practical recommendations on improving of the beam structure in the drift zone of millimeter wave band generators are given using the information obtained. 

WAVEGUIDE HCN-LASER WITH LOW-FREQUENCY PUMPING

Yu. E. Kamenev

160-162

Pumping type electric discharge HCN-laser with 50 Hz a.c. discharge has been investigated, with the electrodes being made in the form of two identical glasses of tantalum. An influence on generation characteristics of mutual direction of pumping and discharge polarity has been found. 

STATISTIC ERROR OF THE RANGE MEASUREMENT USING THE SPECTRAL INTERFEROMETRY METHOD

A. Mogila, K. Lukin, V. Kulik

163-170

The statistic errors of the range measurements are determined and analyzed using the method of one- or two-scale spectral interferometry with and without taking into account inherent noises of the meter. The relations of the statistic errors with the reference-to-reflected signal level ratio as well as with the signal-to-noise spectral density ratio on the meter output are obtained. The formulas for calculation of the potential measurement error are given for both methods. The measurement error is shown to determine with a normalized mean square error of the spectral density estimation. The measurement precision using the method of two-scale spectral interferometry is established to be well above of the one-scale one. That allows the former to apply for precision range measurement. 

A BROADBAND MICROWAVE-THERAPY FOR COMPREHENSIVE TREATMENT OF THE ATEROSCLEROSIS DISCIRCULATORY ENCEPHALOPATHOLOGY AT THE INITIAL STAGE

B. M. Bulgakov, V. A. Malakhov, V. A. Yavorskaya, O. I. Belous, S. P. Sirenko, A. I. Fisun, G. I. Doroshenko, I. N. Pasyura

171-173

Effect of the broadband SHF-radiation was investigated as a medicinal means for arteriosclerosis diseases. It was observed that the improvement of neuralgic status, artery pressure, and biology activity of the brein are increased after the SHF-radiation action of 38 to 80 GHz. 

THE INFLUENCE OF ELECTROMAGNETIC RADIATION AND TEMPERATURE ON THE WHEAT SEEDS LIFE- ABILITY

V. G. Shakhbazov, N. N. Grygoryeva, L. M. Chеpel, S. P. Sirenko, T. M. Tchecshko, V. I. Kiyko, N. N. Gorobets

174-178

The influence of electromagnetic radiation (ER) of sm range ( wave-length - 1.6 sm, power - 14 mW, power flow density (PFD) - 700 mW/sm² ), mm range ( wave-length - from 5 to 8 mm, PFD - 10 mW/sm² ) and He-Ne laser rays ( power - 20 mW, PFD - 2.5 mW/sm² ) on the thermal stability of wheat seeds was investigated. The energetic doze density was common for all the types of radiation which made 840 mJ/sm² and 126 mJ/sm² in different series of the experiment. The seeds were warmed-up in a water thermostat at 52 degrees Celsius for 20 min. The ER influence before and after warming-up of seeds in different periods of time (5, 60 min and 24 hours) between the activity of the factors given was investigated. The percentage of growing showed the reaction of seeds. The results obtained show the ER ability to modify the thermal stability of wheat seeds. Protecting effect could be observed when the seeds were radiated after warming-up. In some particular cases of radiation of seeds before warming-up caused the effect of sensibilization. The similarity of reaction of the seeds to ER of different wave-length within the same energetic doze density could be observed. 

MICROWAVE RADIATION IMPACT ON BIOLOGICAL SYSTEMS

Y. G. Shckorbatov, V. G. Shakhbazov

179-185

In this review the results of investigations of low energy microwave electromagnetic fields (EMF) influence on biological systems are presented. The EMF effects are analyzed on molecular, submolecular and cellular levels. Some results concerning the EMF influence on organism level are presented too. The distinct EMF effects were revealed at all the mentioned levels of organization of biological systems. Authors suppose that in eukaryotic organisms cell nucleus plays the main role in cell reaction to microwave irradiation. One of the review authors suggested that cell reactions to EMF are connected with interfierence between the EMF generated by cell nucleus and the external EMF. 

INTERFEROMETRIC METHOD OF FORMING IMAGES AND OPTIMIZATION OF THE INTERFEROMETER APERTURES

Yu. V. Kornienko

186-190

The mathematical statement of the optimization problem for the input and output apertures of a multibeam interferometer is presented that can be applied to the interferometric method of forming images in the millimeter and shorter wavelength bands. The results obtained by the method of random searching are demonstrated.