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Antennas & Propagation Conference, 2009. LAPC 2009. Loughborough

Date 16-17 Nov. 2009

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Displaying Results 1 - 25 of 202
  • [Front cover]

    Publication Year: 2009, Page(s): c1
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  • [Title page]

    Publication Year: 2009, Page(s): 1
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  • [Copyright notice]

    Publication Year: 2009, Page(s): 1
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  • Welcome message

    Publication Year: 2009, Page(s): 1
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  • LAPC Conference Committee

    Publication Year: 2009, Page(s):ii - iv
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  • Invited speakers

    Publication Year: 2009, Page(s): v
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (35 KB)

    Provides an abstract for each of the invited presentations and a brief professional biography of each presenter. The complete presentations were not made available for publication as part of the conference proceedings. View full abstract»

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  • Keeping a low profile: The history of microstrip antennas

    Publication Year: 2009, Page(s): vi
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (242 KB)

    Summary form only given. The microstrip antenna was conceived in the mists of the early cold war years and slowly but surely became a revolutionary technology the spawned a whole generation of research and researchers. But despite its appealing claims for low profile and low cost, there were battles won and battles lost, as the potential and limitations became clear. This dinner lecture will look ... View full abstract»

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  • Sponsors & exhibitors

    Publication Year: 2009, Page(s): vii
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  • Table of contents

    Publication Year: 2009, Page(s):viii - xx
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  • Bounding the performance limitations of small antennas — Taking a new look at an old problem and interpreting the knowledge gained from the viewpoint of an antenna designer

    Publication Year: 2009, Page(s):2 - 9
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1240 KB) | HTML iconHTML

    In this paper, we describe a new way to estimate the bounds on the performance metrics of small antennas that embellish the Chu-Harrington limit commonly used for the same purpose. The underlying concept is base on the use of dipole moment representations of small antennas and analytic continuations of these representations. View full abstract»

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  • Metamaterials for lenses and cloaking from DC to optics

    Publication Year: 2009, Page(s):10 - 13
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (780 KB) | HTML iconHTML

    I review the development of metamaterials, artificial media engineered to have effective permittivity and permeability values that may not be available in naturally occurring materials, and discuss their use to control electromagnetic fields, and thus to make lenses with sub-wavelength resolution and a cloak of invisibility. View full abstract»

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  • Designing FSS for wireless propagation control within buildings

    Publication Year: 2009, Page(s):14 - 17
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (290 KB) | HTML iconHTML

    This paper reports some of the findings in a collaborative project between the Universities of Kent and Manchester in the UK and Auckland in New Zealand. An objective of the work has been to establish how to create FSS capable of influencing signal strength within buildings, especially if the FSS panel is small with respect to the total wall area, and also finite with respect to wavelength. Result... View full abstract»

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  • Miniaturised periodic structures with antenna applications

    Publication Year: 2009, Page(s):18 - 21
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (575 KB) | HTML iconHTML

    This paper gives a summary of research to date at the University of Sheffield on the miniaturisation of periodic surfaces for use in antenna applications. The paper discusses the use of lumped inductors and capacitors in Frequency Selective Surfaces (FSS) and unit cell sizes of ¿/36 are demonstrated through simulation and measurement. Initial results of a distributed design with no components are... View full abstract»

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  • Measurement based investigations for future communication system performance evaluation

    Publication Year: 2009, Page(s):23 - 30
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (625 KB) | HTML iconHTML

    This paper gives an overview of recently published results related to modeling the radio channel and performance evaluation including the radio channel. For small handheld devices the human hand often has large influence on the performance and therefore must be included in design and validation. An investigation methodology was therefore developed for the study of mobile-phone grip styles over a s... View full abstract»

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  • Real-time propagation forecasting for Earth-space communication

    Publication Year: 2009, Page(s):31 - 35
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (581 KB) | HTML iconHTML

    The use of frequencies in excess of 20 GHz for Earth-space communications is significantly impaired by the effects of the weather phenomena in the troposphere. The main contributing factor is attenuation due to rainfall but at higher frequencies (Q- and V-band 40/50 GHz) cloud attenuation can also be significant. Although small fades can be overcome by adapting the physical layer through changes t... View full abstract»

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  • Delivering live-action to handheld devices: Experimental results and recommendations

    Publication Year: 2009, Page(s):36 - 41
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (956 KB) | HTML iconHTML

    This paper addresses the multicast capabilities of WiFi systems transmitting to handheld devices in outdoor public spaces. The analysis includes a comparison of access point antennas in terms of received signal strength for different conditions and handset orientations. An H.264 AVC encoder and IP packetisation unit is used to multicast IP video streams to WiFi enabled mobile clients. Measurement ... View full abstract»

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  • Modelling for vehicle to vehicle applications

    Publication Year: 2009, Page(s):42 - 48
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (527 KB) | HTML iconHTML

    Rapid growth of personal communications has led to the development of many wireless systems, competing for radio bandwidth. In the vehicular environment, there is recognition of the importance of communications, and therefore the ability to model these channels is important. This paper addresses this issue through the exploration of both vehicle to roadside (VTR) and vehicle to vehicle (VTV) commu... View full abstract»

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  • MIMO antenna design challenges

    Publication Year: 2009, Page(s):50 - 56
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (363 KB) | HTML iconHTML

    This paper provides a brief introductions into the challenges involved when designing antenna for MIMO (Multiple Input Multiple Output) systems on small terminals. The investigation is based on the fundamental parameter of cross-correlation of the antenna transfer functions. Some considerations on the correlation of antennas implemented on small terminals are undertaken. It is shown that the corre... View full abstract»

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  • Design of multi-antenna systems for UMTS mobile phones

    Publication Year: 2009, Page(s):57 - 64
    Cited by:  Papers (8)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (559 KB) | HTML iconHTML

    In this paper, we focus on multiple antenna-systems for portable UMTS devices. First, we perform a state-of-the art review of the best solutions developed all around the world. Then, we present all the UMTS multi-antenna systems designed at the LEAT of the University of Nice-Sophia Antipolis since 2004. We especially describe the neutralization technique dedicated to enhance the total efficiency o... View full abstract»

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  • ESA measurements using the Hybrid Fibre-Optic Reflection Measurement System

    Publication Year: 2009, Page(s):793 - 796
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (310 KB) | HTML iconHTML

    Since the introduction of the wheeler cap method to measure the radiation efficiency of an electrically small antenna (ESA), there have been several techniques presented in literature that have either enhanced on the method or provided an alternative technique. This paper presents measurements of the radiation efficiency of an electrically small monopole using the hybrid fibre-optic RF reflection ... View full abstract»

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  • Multiport antennas for MIMO-systems

    Publication Year: 2009, Page(s):65 - 70
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1363 KB) | HTML iconHTML

    A very promising method to enlarge the radio channels capacity is the use of MIMO (multiple input multiple output) systems. The need to deploy more than one antenna leads to the problem of the restricted available area surface reserved for the antennas, especially on the terminals. In this paper, a concept for a compact multiport antenna is presented, which provides a sufficient decoupling between... View full abstract»

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  • Challenges in complex transmitter development in view of the increasing RF requirements (OTA, SAR, HAC)

    Publication Year: 2009, Page(s):72 - 75
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (455 KB) | HTML iconHTML

    With the continuous trend towards smaller mobile devices with sophisticated functionality and multiple wireless bands, concerns about possible insufficient over-the-air (OTA) performance and increased Specific Absorption Rate (SAR) values are growing within the wireless-telephone industry. These new phones must also comply with the hearing aid compatibility (HAC) standards. The aim of this paper i... View full abstract»

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  • A stable near-field antenna hyperthermia applicator for various tissue types and topologies

    Publication Year: 2009, Page(s):76 - 79
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (222 KB) | HTML iconHTML

    In an expanding number of worldwide clinical trials, conventional loop, dipole and square-patch antennas perform as external hyperthermia applicators for the adjunct treatment of cancer cells at superficial depths inside the human body. A smaller patch design in very close proximity with various phantom tissue models produces focused specific absorption rate (SAR) patterns without significant freq... View full abstract»

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  • A subject-specific radio propagation study in wireless body area networks

    Publication Year: 2009, Page(s):80 - 83
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (302 KB) | HTML iconHTML

    This paper presents a study of subject-specific radio channels in wireless body area networks (WBANs). The simulation tool is based on a parallel finite-difference time-domain method (FDTD) and is well suited to model radio propagations around complex, inhomogeneous objects including human bodies in WBAN. It is found from our study that radio channel characteristics in WBAN are subject specific wh... View full abstract»

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  • Imaging and sensing from 100GHz to 1THz

    Publication Year: 2009, Page(s):84 - 88
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (185 KB) | HTML iconHTML

    This paper discusses the merits of different antenna designs for security applications when operating in the 100 GHz to 1 THz region. Designs are required which are lightweight with an f/number of ~1 and mirror systems are preferred. Lenses have been used for smaller systems (150 mm diameter) but the mass and loss are prohibitive for larger diameters. The propagation of radiation through the atmos... View full abstract»

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