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2008 International Conference on Microwave and Millimeter Wave Technology

21-24 April 2008

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Displaying Results 1 - 25 of 146
  • International conference on microwave and millimeter wave technology, 2008

    Publication Year: 2008, Page(s): c1
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  • Schedule for ICMMT2008/GSMM2008

    Publication Year: 2008
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  • 2008 international conference on microwave and millimeter wave technology proceedings Volume 4

    Publication Year: 2008, Page(s): ii
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  • [Copyright notice]

    Publication Year: 2008, Page(s): iii
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  • Program

    Publication Year: 2008
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  • Session I24P1 PBG and metamaterials (II)

    Publication Year: 2008, Page(s): 1601
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  • Performance improvement of microstrip patch antenna and array with electromagnetic bandgap structure

    Publication Year: 2008, Page(s):1602 - 1605
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (590 KB) | HTML iconHTML

    A microstrip patch antenna with the EBG structure is proposed. The performance improvement of the antenna demonstrates that the EBG structure has effects on surface wave suppression and broadside radiation power reduction. 4 columns of EBG structure are embedded between array elements for mutual coupling reduction. An 12 dB mutual coupling reduction is achieved significantly. View full abstract»

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  • Locating the operation-band of PBG waveguide using LHM concept

    Publication Year: 2008, Page(s):1606 - 1608
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (405 KB) | HTML iconHTML

    This paper presents an approach to locate the operation-band of a quasi TEM waveguide loaded PBG with the uniform electric field distribution along the waveguide cross section by using left-handed material performance of the PBG waveguide. We first measure the S-parameter of the PBG waveguide, and then extract the refraction index, effective permittivity and effective permeability from these S-par... View full abstract»

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  • A novel broadband EBG using multi-period mushroom-like structure

    Publication Year: 2008, Page(s):1609 - 1612
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (429 KB) | HTML iconHTML

    A novel broadband electromagnetic band-gap (EBG) structure is presented using multi-period mushroom-like structure with different patch size cascaded. Direct transmission method is used to determine the band-gap of the EBG structure. The effects of the unit number and patch size on the mushroomlike EBG structure are investigated. Two kinds of unit with different patch size are cascaded to enlarge ... View full abstract»

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  • A novel metamaterial-inspired electrically small antenna fed by CPW

    Publication Year: 2008, Page(s):1613 - 1616
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (469 KB) | HTML iconHTML

    This article presents the design of an inexpensive, efficient, and electrically small antenna based on metamaterial- inspired structure fed by the coplanar waveguide (CPW). The size of the proposed antenna is 12 mm x 12 mm with the resonant frequency of 1.47 GHz. Details of the proposed antenna are presented, with full-wave simulation results to support the design. View full abstract»

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  • A planar microstrip implementation of dual-composite right/left handed transmission line

    Publication Year: 2008, Page(s):1617 - 1619
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (393 KB) | HTML iconHTML

    In this paper, a planar microstrip dual-composite right/left-handed transmission line (D-CRLH TL) is proposed. It only includes interdigital capacitor and simple strip elements, which can be easily designed and applied to microwave devices and systems. An effective model is also presented to show its characteristics. This model is more exact than the ideal one. The balanced condition is valid in t... View full abstract»

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  • Coupling characteristics between composite right-/left-handed transmission line and conventional transmission line

    Publication Year: 2008, Page(s):1620 - 1623
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (414 KB) | HTML iconHTML

    The coupling characteristics between a composite right/left-handed transmission line (CRLH TL) with lumped-elements and a conventional right-handed transmission line (RH TL), is studied. It is theoretically shown that tight coupling is obtained when the product of the average permittivity and average permeability is negative (epsiv macr ldr mu macr < 0), at the same time the CRLH TL is still in... View full abstract»

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  • Peculiar radar cross section properties of metamaterials with zero index of refraction

    Publication Year: 2008, Page(s):1624 - 1626
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (366 KB) | HTML iconHTML

    In this paper, based on peculiar electromagnetic characteristics of metamaterials, peculiar radar cross section properties of metamaterials with zero index of refraction are discussed. These results provide some interested insights for potential applications in radar. View full abstract»

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  • Slow and frozen waves in a planar air waveguide with anisotropic metamaterial cladding

    Publication Year: 2008, Page(s):1627 - 1630
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (503 KB) | HTML iconHTML

    We have studied the wave guiding properties of a planar air waveguide with anisotropic metamaterial cladding. Through complete analysis of the guiding modes for different cladding metamaterials, we demonstrate that slow and even frozen electro-magnetic wave can be supported by such an air waveguide. We have also proposed practical realization of the metamaterial by multilayer structure consisting ... View full abstract»

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  • Magnetic resonance leads to negative refraction

    Publication Year: 2008, Page(s):1631 - 1633
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB) | HTML iconHTML

    We report negative refraction observed in simulation of a prism comprised of modified split-ring resonators, which are well-known metamaterial particles with magnetic response to incident waves. Microscopic composition of the metamaterial prism is analyzed and negative refraction is explained by effective medium theory. View full abstract»

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  • A novel compact uni-planar electromagnetic band-gap (UC-EBG) structure

    Publication Year: 2008, Page(s):1634 - 1636
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB) | HTML iconHTML

    A novel uni-planar electromagnetic Band Gap (EBG) structure incorporated with spiral shape capacitor and meandered line inductor(SC-ML-EBG) is presented. This structure significantly enlarges the equivalent capacitance between neighboring elements, as well as increases the equivalent inductance. So, it becomes even more compact in size. A comparison has been carried out between this new structure ... View full abstract»

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  • A small dual-band EBG structure for microwave

    Publication Year: 2008, Page(s):1637 - 1639
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (402 KB) | HTML iconHTML

    A novel dual-band compact electromagnetic-bandgap (EBG) structure is presented. This structure introduces a interdigital-spiral shape stripline to enlarge the inductance effect, which can extremely reduce the period of the lattice. Further more, it utilizes concave patches and convex patches to arrange alternately for dual band purpose. It also can be applied to design a reconfigurable multiband E... View full abstract»

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  • Session I24P2 Microwave antennas (III)

    Publication Year: 2008, Page(s): 1640
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  • Fractaly terminated line-fed Microstrip slot antenna

    Publication Year: 2008, Page(s):1641 - 1643
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1047 KB) | HTML iconHTML

    In this paper a Microstrip slot antenna fed by a fractaly terminated line is proposed. The return loss, input impedance, and radiation pattern of such a structure were studied and the effect of the fractal iterations were compared to the traditional simple line fed microstrip slot antenna. It would be shown that the bandwidth of such a structure is more than 80% which is evidently more than triple... View full abstract»

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  • A compact square-ring printed monopole ultra wideband antenna

    Publication Year: 2008, Page(s):1644 - 1646
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (686 KB) | HTML iconHTML

    A simple and compact microstrip-fed ultra wideband (UWB) printed monopole antenna is proposed in this paper. The antenna is composed of a square ring and occupies about 7.91 GHz bandwidth covering 3.09-11 GHz. The experimental and simulated results exhibit good agreement. The characteristics of the proposed antenna are analyzed, and the geometry parameters for optimal performance are also investig... View full abstract»

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  • A microstrip-fed wide-band tapered slot antenna

    Publication Year: 2008, Page(s):1647 - 1650
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB) | HTML iconHTML

    Research on wide-band, low-profile antennas has been steadily increasing in the past several years due to more demanding requirements from the aerospace industry. This paper presents the simulation investigations of a printed microstrip slot antenna. It provides a wide impedance bandwidth adjustable by variation of its parameters, such as the relative permittivity and thickness of the substrate, w... View full abstract»

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  • Optimized desgin of circularly polarized wideband stacked microstrip antenna with single-fed

    Publication Year: 2008, Page(s):1651 - 1653
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB) | HTML iconHTML

    A method of developing the quality of circularly polarized microstrip antennas using the "almost square" patch is presented particularly. Antennas are designed and optimized with patches printed on foam and common dielectric substrate, which separately have over 17% and 14% 3 dB axial ratio (AR) bandwidth. The latter has been fabricated and measured, the measurements agree well with simulated resu... View full abstract»

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  • A UWB antenna with novel L branches on ground for band-notching application

    Publication Year: 2008, Page(s):1654 - 1657
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (921 KB) | HTML iconHTML

    In this paper, one L-branch-on-ground structure for band-notching UWB printed-elliptical-slot (PES) antenna is presented. The L branch is connected to the ground other than the antenna element. It is used for cutting the 5.8 GHz band. Compared with the U slot, T branch in the antenna element, L branch on ground is flexible because the point connecting to the ground can change in a big range. Becau... View full abstract»

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  • Analysis and design of novel directional ultra wide-band antennas

    Publication Year: 2008, Page(s):1658 - 1661
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (606 KB) | HTML iconHTML

    Ultra wide-band is one of the hottest issues in the current researches on antennas. The circular monopole antenna is a kind of ultra wide-band antennas with simple structure. Firstly a novel antenna was researched. Four circular disc monopoles were placed across each other. They were considered as the feedings, and the reflection plane was planar. It could achieve dual polarization characteristics... View full abstract»

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  • Design of broadband stacked E-shaped patch antenna

    Publication Year: 2008, Page(s):1662 - 1663
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1067 KB) | HTML iconHTML

    A low cost, compact stacked E-shaped patch antenna is presented and the simulation results of its performance are investigated. The antenna input impedance bandwidth is 45% (3.1-4.9 GHz), which is better than the square patch stacked E-shape patch antenna. The dimension and position of the rectangular patch as well as the shift of coaxial probe location have been optimized to achieve this wide ban... View full abstract»

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