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2007 6th International Conference on Antenna Theory and Techniques

17-21 Sept. 2007

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Displaying Results 1 - 25 of 154
  • [Front cover]

    Publication Year: 2007, Page(s): c1
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  • [Title page]

    Publication Year: 2007, Page(s): i
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  • [Copyright notice]

    Publication Year: 2007, Page(s): 2
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  • List staff

    Publication Year: 2007, Page(s):3 - 4
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  • Welcome

    Publication Year: 2007, Page(s): 5
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  • Table of contents

    Publication Year: 2007, Page(s):6 - 14
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  • Microwave spherical focusing systems

    Publication Year: 2007, Page(s):15 - 19
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (317 KB) | HTML iconHTML

    Microwave focusing systems of spherical shape (constant K-lens, Luneberg lens and spherical reflector antenna) are investigated. The corresponding wave scattering problems are treated as classical boundary value problems for Maxwell's equations. The systems are illuminated by an electromagnetic plane wave (receiving) and by a complex-point huy-gens source producing a Gaussian beam-like radiation (... View full abstract»

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  • The family of atomic functions and digital signal processing in synthetic aperture radar

    Publication Year: 2007, Page(s):20 - 25
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (379 KB) | HTML iconHTML

    The report consists of two parts. In the first part, the sampling analysis of weight windows is conducted on the basis of atomic functions (AF) and their application in problems of the classical method of synthetic aperture radar (SAR) is considered. The second part contains fundamentals of a modified method of synthetizing the aperture. The modified ambiguity function for different signals is pro... View full abstract»

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  • Microwave scattering on atmospheric particles

    Publication Year: 2007, Page(s):26 - 31
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (406 KB) | HTML iconHTML

    The models of microwave scattering on atmospheric particles are presented. Shape, size, material, and other properties of scatterers are taken into account at different wave polarizations. Results are important for remote recognition of hydrometeor types, radar and telecommunications. View full abstract»

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  • Adaptive techniques of the wavefield formation in random-inhomogeneous multimode propagation channels by the use of large arrays

    Publication Year: 2007, Page(s):32 - 36
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (229 KB) | HTML iconHTML

    We address the source array synthesis problem in a random propagation channel under the different optimization criteria specified for the remote receiving array, namely, the criteria of (i) the output SNR and (ii) the array gain. For the first step, we discuss the optimal schemes for the source excitation and array beamforming by using a general technique of the eigenvalue-eigenvector expansion as... View full abstract»

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  • EBG resonator antennas: State of the art and prospects

    Publication Year: 2007, Page(s):37 - 43
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (858 KB) | HTML iconHTML

    This article presents the recent developments on electromagnetic band gap (EBG) resonator antennas. After reminding the working principles of such radiating devices, a state of the art is presented to show main applications of these antennas including high directivity solutions, multiband devices, omnidirectionnal coverages, focal feeds for reflector and tuning. Finally, some prospects are given f... View full abstract»

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  • Recent progress in development of multiband feed horns (Review)

    Publication Year: 2007, Page(s):44 - 50
    Cited by:  Papers (4)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1087 KB) | HTML iconHTML

    This paper proposes overview of the multiband feed system for reflector-type antennas. Coaxial, multimode Potter's type structures, multiband corrugated and dielectric loaded feed horns is discussed below. View full abstract»

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  • Minimization of phase noise in scaled device coupled mode oscillators

    Publication Year: 2007, Page(s):51 - 56
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2053 KB) | HTML iconHTML

    The performance of the electronic system strongly depends on the speed of devices, and device scaling has driven this momentum towards achieving faster speed and high level of integration. This paper describes the impact of phase noise in scaled SiGe HBTs coupled mode oscillators topology, which has recently emerged as a strong contender for RF and mixed signal applications. The relative contribut... View full abstract»

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  • VLBI-observation of ‘Huygens’ probe

    Publication Year: 2007, Page(s):57 - 58
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB) | HTML iconHTML

    JIVE -Joint Institute for Very Long Baseline Interferometry (VLBI) in Europe -has managed under ESA contract the VLBI data acquisition of a stabile carrier-signal from Huygens' probe during landing on Titan in January 2004, using ~17 radio telescopes. Evaluation and investigation of the data is included in the same ESA contract. The scenario was described in a previous ICATT Conference (van 't Klo... View full abstract»

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  • Diffraction radiation antennas for SHF and EHF radiosystems

    Publication Year: 2007, Page(s):59 - 64
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (936 KB) | HTML iconHTML

    Diffraction radiation antennas are described, consisting of a dielectric waveguide and a diffraction grating. A wide variety of antennas models are presented, a number of them have been used in SHF and EHF radiosystems. Among them: antenna for 8 mm satellite radiometer, linear antennas for airborne side looking radars, antennas with cosecant-type radiation pattern, planar and linear scanning anten... View full abstract»

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  • Design and simulation of novel broadband antenna for mobile telecommunication

    Publication Year: 2007, Page(s):65 - 67
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (275 KB) | HTML iconHTML

    A novel broadband omnidirectional antenna is presented in this paper. The antenna is proposed for operating at mobile telephone bands. To achieve simple structure, the proposed antenna is composed of three monopoles in a plane. The impedance matching and bandwidth for the presented antenna are mainly affected by length and separation of the three monopoles. The theory of basic three monopoles ante... View full abstract»

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  • Microwave measurement of directories and foweve electronics & their applications

    Publication Year: 2007, Page(s):68 - 70
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    In the first part of presentation it is planned to present the wide review of all the method of microwave methods of measurements of linear dielectric and non-linear dielectrics as ferroelectrics. View full abstract»

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  • The reflectivity investigation of satellite and ground based antennas AT 100-380 GHZ and 80 K

    Publication Year: 2007, Page(s):71 - 75
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (627 KB) | HTML iconHTML

    The satellite and ground based antenna reflectivity investigations have been made. It was revealed that the reflective coverings of some composite carbon fibers antennas have inadmissibly more reflective losses which lead to the essential noise temperature increasing of high sensitive cooled receivers. The significant anisotropy of carbon fibres antenna covering have been found. Unexpected reflect... View full abstract»

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  • Beauty of fractals design of fractal antennas

    Publication Year: 2007, Page(s):76 - 81
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (673 KB) | HTML iconHTML

    In this paper, beauty of fractals, some bases of its, processes, parameters and pictures of Mandelbrot and Julia sets are represented. Algorithms of computer-aided design of the dipole and planar fractal antennas of different orders are described. Current distribution, characteristics of impedance, distribution of near electromagnetic field and radiation of the fractal antennas are analyzed. Repre... View full abstract»

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  • Effects of the element separation on the noise performance of receiving antenna arrays

    Publication Year: 2007, Page(s):82 - 86
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1296 KB) | HTML iconHTML

    Antenna arrays of closely separated elements can be used to achieve a large field of view of a radio telescope with highly efficient multiple beams. However, due to strong mutual coupling effects which exist in such dense arrays, the receiver noise can degrade. To reduce this noise degradation, the optimal noise match condition should be satisfied for all scan angles. This paper presents results o... View full abstract»

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  • Matrix theory of dissipative antenna arrays

    Publication Year: 2007, Page(s):87 - 92
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (317 KB) | HTML iconHTML

    A theory of a phased antenna array with lossy radiating elements is elaborated. The theory is based on representation of a radiating system as the equivalent multi-port linking amplitudes of traveling waves in transmission lines with amplitudes of spherical waves in free space. Relations for calculation of blocks of a scattering matrix, that defines parameters of this multiport, are obtained under... View full abstract»

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  • Asymptotic wave-like modeling of dielectric lenses

    Publication Year: 2007, Page(s):93 - 98
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    We propose asymptotic wave-like approximations for the accurate modeling of dielectric lenses used in quasi-optical systems of millimeter, submillimeter, and infrared wave applications. For the comparison, we obtain an exact full-wave solution of two-dimensional focusing lens problem and use it as a benchmark for testing and validation of asymptotic models being proposed. View full abstract»

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  • Antenna beam scanning via aperture synthesis

    Publication Year: 2007, Page(s):99 - 103
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1356 KB) | HTML iconHTML

    A new concept for scanning antennas design is suggested. The concept is based upon a combination of a single radiating element movement with antenna aperture synthesizing. The radiator movement may be implemented either in direct way or virtually via switching of feeding circuitry of the antenna ID array. The latter may be done either electro-mechanically or electronically. In the paper, the case ... View full abstract»

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  • Electric characteristics of a skin layer of a plasma jet generated as a result of the blank cartridge explosion in a free space

    Publication Year: 2007, Page(s):104 - 106
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (310 KB) | HTML iconHTML

    Complex impedance of an electrically excited skin of the radiating plasma jet generated using an explosive method in free space is estimated for the main stage of the jet existence. The analytical expressions describing the frequency dependence of the complex impedance of a skin layer of the plasma jet have been obtained. The measured characteristics of the plasma are used to calculate the resista... View full abstract»

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  • Forming and radiation of high-power short radio pulses

    Publication Year: 2007, Page(s):107 - 109
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB) | HTML iconHTML

    An algorithm of synthesis of energy compressors and radiators of high-power short radio pulses has been developed and implemented for the first time on the level of complete electrodynamic models. View full abstract»

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