ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364)

14-16 Sept. 2000

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  • ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364)

    Publication Year: 2000
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    Freely Available from IEEE
  • Discussion on operator theory of electromagnetic field

    Publication Year: 2000, Page(s):P24 - P28
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    The difficulties of classical electromagnetic theory is discussed and the operator theory is suggested for overcome these difficulties in this paper. The applications of the operator theory in boundary value problems of electromagnetic field are also discussed. View full abstract»

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  • Effects of nonlinear capacitance on soliton wave propagation in NLTLs for millimeter wave multiplication

    Publication Year: 2000, Page(s):485 - 488
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (310 KB)

    On the basis of a model to study solitary wave propagation in periodically loaded nonlinear transmission lines, we have studied the influence of device nonlinearity on soliton behaviour. In this work we present the effects of varying device nonlinearity by tailoring the width of a symmetric C-V characteristic, preserving the equilibrium capacitance. The results can be useful to understand soliton-... View full abstract»

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  • Author index

    Publication Year: 2000, Page(s):720 - 724
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    Freely Available from IEEE
  • A new linearity enhancing technique for ultra-wide dynamic range low noise amplifiers

    Publication Year: 2000, Page(s):150 - 152
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    This paper presents a new linearity enhancing technique for design of LNAs (Low Noise Amplifiers) which require high linearity and low power consumption for CDMA mobile station applications. In order to verify the feasibility of the proposed scheme over the conventional scheme, four different low noise amplifiers for 9000 MHz and 1.85 GHz applications have been designed, fabricated and measured us... View full abstract»

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  • An improvement of horn-gain formula

    Publication Year: 2000, Page(s):349 - 352
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    A new formula was derived for the far field and gain of the pyramidal horn, open-ended rectangular waveguide (0EG) and E-plane sectoral horn. In this new formula the concept of phase base marker plane for horn antennas was firstly proposed; the edge effect of the apertures was taken into account at the same time, the approximation of the path length was avoided by direct numerical integration for ... View full abstract»

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  • Internal waveform probing of MMIC power amplifiers

    Publication Year: 2000, Page(s):638 - 641
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    A microwave waveform internal probing technique for MMICs under normal CW or pulsed operation is described. The application to HBT and HEMT power amplifiers are demonstrated. The present high-impedance probing approach is compared to optical probing techniques View full abstract»

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  • Electromagnetic pollution and its control

    Publication Year: 2000, Page(s):461 - 464
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    Electromagnetic pollution is getting more and more severe nowadays. In this paper the characteristics and effects of electromagnetic radiation on organisms are discussed. Thermal effects and non-thermal effects of electromagnetic radiation on living things are also presented. Then a series of suggestions to diminish electromagnetic pollution are put forward. With the rapid development of electroni... View full abstract»

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  • A new node architecture for scalable wavelength label switching networks using MPLS

    Publication Year: 2000, Page(s):331 - 334
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    This paper presents a novel approach integrating recent advances in multiprotocol label switching (MPLS) traffic engineering with wavelength switch/routing technologies to achieve optical interconnect for IP-centric Data Networks. A new node architecture for scalable wavelength label switching networks (WLSnet) is proposed, which supports label switching and wavelength routing. This paper shows th... View full abstract»

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  • The impregnated cathode for high power klystron

    Publication Year: 2000, Page(s):146 - 149
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    This article reviews the state-of-the-art in cathodes for high power klystron. The main requirements of the cathodes performance are: current density over 30 A/cm2 and a life of over 10000 hours View full abstract»

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  • Corrugated beat-wave TE0n/TE11 mode converters

    Publication Year: 2000, Page(s):623 - 625
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (180 KB)

    High power linearly polarized corrugated waveguide mode converters have been developed to transform the high-order TE0n mode output wave from a gyrotron into the fundamental waveguide mode TE11 mode. The converter consists of rippled wall perturbations of a cylindrical waveguide. The bandwidth is predicted to be inversely promotional to the period number. A four-period TE View full abstract»

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  • Bias field/frequency characteristic of millimeter wave semiconductor resonators at 77°K

    Publication Year: 2000, Page(s):514 - 517
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    Axially magnetized planar gyroelectric resonators are characterized for both InSb and GaAs semiconductors at 77°K. The calculations assume that these materials are represented by the tensor permittivity derived from the Drude model of cyclotron motion in a plasma. Modal information is presented in terms of bias field and signal frequency. Resonance and loss regions are identified. The dependen... View full abstract»

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  • Microwave power dependence of surface resistance in BSCCO superconductors

    Publication Year: 2000, Page(s):108 - 111
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    The effect of silver and microwave power dependence of surface resistance in BiSrCaCuO (BSCCO) superconductors are the subject of interest of this paper. Many interesting features such as low temperature and high temperature peaks and nonlinear power dependence of surface resistance are seen in the experimental results and discussed here briefly View full abstract»

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  • Combination of FDTD and beam simulation method to compute EM scattering from rough surfaces

    Publication Year: 2000, Page(s):367 - 370
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    FDTD in combination with beam simulation is employed to compute the EM scattering from rough surfaces to enlarge the rough surfaces size that FDTD can deal with. The efficiency of this technique is demonstrated with numerical results View full abstract»

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  • Design study for base station transceiver of wideband CDMA system

    Publication Year: 2000, Page(s):235 - 238
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    An experimental implementation of the base station transceiver for a wideband CDMA system is presented in this paper. The whole design can be divided into three main parts: transmitter, receiver and frequency synthesizer. Commercial RF ICs are adopted in the circuit design thus making the system small enough to fit onto a single PCB. The RF direct modulation technique eliminated the intermediate f... View full abstract»

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  • Active integrated antennas using planar quasi-Yagi radiators

    Publication Year: 2000, Page(s):P1 - P4
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    This paper reviews the development of several types of active integrated antennas at the authors group based on a novel planar quasi-Yagi structure which has broad bandwidth (>50%), high efficiency (>93%), low cross-polarization (<-13 dB), good front-to-back ration (>13 dB) and extremely compact size. The basic performances of the elementary quasi-Yagi antenna is first described, follo... View full abstract»

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  • Semi-disc microstrip patch antenna with dual-frequency operation

    Publication Year: 2000, Page(s):345 - 348
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    A modified semi-disc microstrip patch antenna with dual-frequency operation is addressed. Incorporating two symmetrical thin slots and a shorting-pin, this novel antenna achieves both compactness and dual-frequency operation with wide impedance bandwidth at each resonance. The design and characteristics of the antenna are presented and discussed. Comparison with a normal shorted semi-disc MPA with... View full abstract»

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  • Frequency and power governing nonlinear magnetic waves

    Publication Year: 2000, Page(s):634 - 637
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    In this paper we investigate the properties of nonlinear magnetic TM waves in the infrared frequency region on a plane interface between two uniaxial antiferromagnets. From the theoretical analysis and the numerical simulation, we find in this new guiding structure that there exist two thresholds: the frequency threshold and power threshold. All the incident waves should satisfy the two thresholds... View full abstract»

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  • Design of hexagonal planar arrays using genetic algorithms for performance improvement

    Publication Year: 2000, Page(s):455 - 460
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    The concept of optimization of the field pattern of a given equally spaced array realization by thinning it represents a very challenging problem having considerable practical advantages. This paper presents the application of genetic algorithms in design of hexagonal planar arrays View full abstract»

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  • High stability microwave-millimeter wave receiver without PLLs

    Publication Year: 2000, Page(s):327 - 330
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    A high stability microwave-millimeter wave receiver without any phase-locked loops (PLLs) configured to measure magnitude and phase in a signal transmitted from a microwave or millimeter wave source is presented in this paper. It can be applied in measurements of transmission, return loss, radiation and scattering. Compared with traditional amplitude-phase measurement systems and network analyzers... View full abstract»

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  • XC automatic equipment identification (AEI) system

    Publication Year: 2000, Page(s):176 - 179
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    XC AEI system that is researched and manufactured by Lanzhou Yuanwang IT Co. Ltd. is presented. This system has mainly been developed for the automatic electronic identification of freight cars and locomotives on railroads. Its composition, main specifications and technical innovations are introduced in this paper View full abstract»

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  • Classification of forest types on the basis of analysis of radar images

    Publication Year: 2000, Page(s):583 - 586
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    The paper presents the normalised radar cross sections σ0 of different forests (coniferous, mixed and deciduous) in the Moscow region. The measurements were carried out by SIR C SAR for different combinations of receiving/transmitting polarisations (HH, VV and HV) in different frequency bands (L and C) at the number of observation angles (210 and 630). The mo... View full abstract»

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  • A multi-octave five-bit MMIC phase shifter with compatible different control signals [using MESFETs]

    Publication Year: 2000, Page(s):142 - 145
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    Design, fabrication and performance of a multi-octave five-bit MMIC phase shifter with compatible different control signals is described. 22.5° and 11.25° phase shift bits are a topology of a sharing Lange coupler. High performance (low peak phase error: ⩽6° for 180°, 90° and 45° phase shift bits, low VSWR: ⩽1.9, low insertion loss variations: ⩽15±0.8 dB ... View full abstract»

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  • Mobile IP2

    Publication Year: 2000, Page(s):403 - 407
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    Internet traffic is growing at an exponential rate and more and more people's lives are tightly coupled with the Internet. The ability to keep connected with the Internet while on the move is highly desirable in an increasingly mobile environment. In this proposal, we present a mean for ubiquitous network access for consumers in both wired and wireless environments. We introduce the concept of mul... View full abstract»

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  • The dispersion characteristics of asymmetric supported broadside-coupled coplanar waveguides

    Publication Year: 2000, Page(s):619 - 622
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    In this paper, using electric and magnetic decoupling modeling the dispersion characteristics of asymmetric supported broadside-coupled coplanar waveguides are analyzed by the use of the method of lines. It is found that these kind of coupled transmission lines have weak dispersions in a wide frequency band View full abstract»

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