Metal‐only Fresnel zone plate antenna for millimetre‐wave frequency bands

Gómez, Josefa; Tayebi, Abdelhamid; Lucas, Jesús de; Cátedra, M.F.

doi:10.1049/iet-map.2013.0196

Cited by 12 publications

(4 citation statements)

References 22 publications

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“…An eight‐level FZP reflector was designed firstly by Malliot [19]. Tayebi et al [20–22] proposed a modified phase‐correcting FZP reflector for broadband operation. The shaped surface is modelled by parametric surfaces named non‐uniform rational B‐spline.…”

Section: Introductionmentioning

confidence: 99%

W band axially displaced monopulse dual‐reflector antenna for inter‐satellite communications

Wang

2016

IET Microwaves, Antennas & Propagation

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An axially displaced monopulse dual‐reflector antenna operating at W band is proposed in this study. The antenna configuration consists of a hyperboloid as the subreflector, a combination of series of paraboloids with different focal length as the main reflector and a low‐loss sum‐and‐difference network, which is based on waveguide magic Ts and bent waveguides. Compared with traditional dual‐reflector antenna, axial size and weight of this novel antenna can be reduced to a certain extent. Measured results show that the gain is 40.1 dBi, the sidelobe is <−19.7 dB and the null‐depth is <−27.7 dB at the central frequency. The radiation patterns remain almost the same in the bandwidth. It is demonstrated that this antenna exhibits good radiation performances and is suitable for inter‐satellite systems.

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Section: Introductionmentioning

confidence: 99%

W band axially displaced monopulse dual‐reflector antenna for inter‐satellite communications

Wang

2016

IET Microwaves, Antennas & Propagation

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“…In recent years, ultrawideband (UWB) system is a hot research topic owe to its wide bandwidth, high data rate, and so forth. Several MIMO antennas designed for UWB systems are reported [3][4][5]. However, few of them can achieve high isolation…”

Section: Introductionmentioning

confidence: 99%

“…They collimate the incoming beam, from the far‐field into a focal point, where the concentrated energy can then be extracted by another antenna, with an overall higher gain. Among typical applications of lens antennas, the use for higher microwave and millimeter waves is particularly attracting, as they can present competitive features, namely low‐profile and gain, in comparison to alternatives like parabolic reflectors . Radars can also benefit from the focusing properties of lenses, where the direction of arrival can be directly determined from an array of detector antennas placed along the focal points of a lens .…”

Section: Introductionmentioning

confidence: 99%

X‐band printed fresnel zone plate antenna: Design, simulation, and field measurements

Perotoni

Junqueira

2015

Micro & Optical Tech Letters

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Design, simulation, and measurements of a horn‐fed X‐Band Fresnel Lens antenna is presented. The influence of the number of rings, substrate of choice and the respective near and far‐field measurements are shown. The antenna is designed to be used in a free‐space materials measurement setup, as a low cost and rugged alternative to dielectric horn antennas, therefore its focal area is defined and characterized. Measurements confirmed the simulation evaluations. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2604–2609, 2015

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“…As described in chapter 4, passive reflectors have been extensively studied to optimize the communication links [122] and radars [123], [124], whereas to the best of our knowledge there are no publications on the design and application of millimeter-wave reflectors. In [122] the concave parabolic reflector geometry is adapted to an irregular planar surface, based on the low-profile Fresnel zonal plate antenna (FZP) [125] and also called reflectarray. The resulting reflector retains almost the same efficiency and performance, but its volume is much smaller.…”

Section: Introductionmentioning

confidence: 99%

Human Body Scattering Effects at Millimeter Waves Frequencies for Future 5G Systems and Beyond

Peña¹

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Future mobile communications are expected to experience a technical revolution that goes beyond Gbps data rates and reduces data rate latencies to levels very close to a millisecond. New enabling technologies have been researched to achieve these demanding specifications. The utilization of mmWave bands, where a lot of spectrum is available, is one of them.Due to the numerous technical difficulties associated with using this frequency band, complicated channel models are necessary to anticipate the radio channel characteristics and to accurately evaluate the performance of cellular systems in mmWave. In particular, the most accurate propagation models are those based on deterministic ray tracing techniques. But these techniques have the stigma of being computationally intensive, and this makes it difficult to use them to characterize the radio channel in complex and dynamic indoor scenarios. The complexity of characterizing these scenarios depends largely on the interaction of the human body with the radio environment, which at mmWaves is often destructive and highly unpredictable.On the other hand, in recent years, the video game industry has developed powerful tools for hyper-realistic environments, where most of the progress in this reality emulation has to do with the handling of light. Therefore, the graphic engines of these platforms have become more and more efficient to handle large volumes of information, becoming ideal to emulate the radio wave propagation behavior, as well as to reconstruct a complex interior scenario. Therefore, in this Thesis one has taken advantage of the computational capacity of this type of tools to evaluate the mmWave radio channel in the most efficient way possible. This Thesis offers some guidelines to optimize the signal propagation in mmWaves in a dynamic and complex indoor environment, for which three main objectives are proposed.The first objective has been to evaluate the scattering effects of the human body when it interacts with the propagation channel. Once evaluated, a simplified mathematical and geometrical model has been proposed to calculate this effect in a reliable and fast way. Another objective has been the design of a modular passive reflector in mmWaves, which optimizes the coverage in indoor environments, avoiding human interference in the propagation, in order to avoid its harmful scattering effects. And finally, a real-time predictive beam steering system has been designed for the mmWaves radiation system, in order to avoid propagation losses caused by the human body in dynamic and complex indoor environments.

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Metal‐only Fresnel zone plate antenna for millimetre‐wave frequency bands

Cited by 12 publications

References 22 publications

W band axially displaced monopulse dual‐reflector antenna for inter‐satellite communications

W band axially displaced monopulse dual‐reflector antenna for inter‐satellite communications

X‐band printed fresnel zone plate antenna: Design, simulation, and field measurements

Human Body Scattering Effects at Millimeter Waves Frequencies for Future 5G Systems and Beyond

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