Artificial Ceramic Metamaterial with Meshed Grid Structure for Radome Application

Zhang, Xian Gao; Miao, Xigeng; Fang, Xiao Wei; Wang, Hai Lian; Zhang, Ling; Zhao, Zhiqin; Liu, Ruo Peng

doi:10.4028/www.scientific.net/amr.893.11

Cited by 2 publications

(3 citation statements)

References 8 publications

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“…Fused silica ceramics and composites [1] have excellent thermal, biological, and electromagnetic properties and have potential applications for radomes, microwave devices, implantable sensors, etc. With the emergence of metamaterials, there is a strong interest in fabricating ceramic based metamaterials to broaden the frequency range of transmitting microwaves [2]. Ceramic metamaterials are actually laminated composites with a passive component of conductive networks/arrays.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of Low-Temperature Co-Firable Green Tapes for Making Fused Silica Laminated Composites

Miao

Zhu

et al. 2014

AMM

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For achieving high-temperature resistance and a broadband of microwave transmission, ceramic metamaterials consisting of fused silica ceramic substrates and electrically conductive networks/ arrays are desirable. A new strategy of fabricating the fused silica metamaterials is to combine the low temperature co-fired ceramic (LTCC) technique with a method of ceramic joining via green tapes. The important part of the new strategy lies in the preparation of suitable green tapes that are co-firable with a conductive silver-based film/strip and have a strong affinity to the fused silica substrates. Therefore, in this paper, three green tape materials were prepared and intensively characterised using scanning electron microscopy, x-ray diffraction, dilatometry, dielectric measurement, etc. It was found that the tape materials were based on dielectric glasses and crystalline phases of major eulytite and minor cristobalite, leading to rather low levels of dielectric constant (<6) and loss tangent (in the order of 10-3). The three tape materials also had different levels of thermal expansion coefficients, co-firability with a conductive silver-based paste, and bondability to the fused silica substrates. These findings suggest that one can achieve desirable ceramic matematerials with well-controlled shapes and dimensions of the condutive networks/arrays after properly laminating the green tapes between the fused silica substrates.

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Section: Introductionmentioning

confidence: 99%

Characterisation of Low-Temperature Co-Firable Green Tapes for Making Fused Silica Laminated Composites

Miao

Zhu

et al. 2014

AMM

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“…(9) A structure suitable for high temperatures is described in [80]. It consists of an Ag (silver) microstructure pressed between two layers of quartz glass.…”

Section: Designmentioning

confidence: 99%

“…[70] (2) Omega and reversed-omega elements in the unit cell, improved transmission between 13 and 17 GHz [72] (3) DPS and DNG media, gain increase to 6 dBi, beamwidth reduction by 37.5% [73] (4) Highly transparent at normal incidence, reduced reflection at oblique incidence, no phase change upon transmission [74] (5) Gain enhancement through 9 subwavelength holes by about 3.4 dB [75] (6) A 4-dB improvement in radiation pattern for blind spot angle, wide-angle impedance matching, blind spot mitigation [3] (7) DPS and DNG layers, gain increase by 3.45 dB, increase in the directivity by 2.9 dB, bandwidth improvement [78] (8) Refractive index smaller than unity, CP antenna, 3-dB improvement of the gain, increase of the bandwidth [79] (9) Heat-resistant structure, stable transmission at different incident angles, bandwidth increase from 10 GHz to 12 GHz by changing the size of unit cells [80] (10) Uniaxial medium with large permittivity along the anisotropy axis, operation on the near field, TM polarization transparent, broader radiation pattern, nearly eliminated interference within the cavity [81] (11) Polarization-and frequency-selective metasheets in X and Ka bands [82] (12) Disc-shaped electrically large metasheet, a hybrid approach (PO/FEM) to calculation of transmission [8] …”

Section: Designmentioning

confidence: 99%

Metamaterials for Microwave Radomes and the Concept of a Metaradome: Review of the Literature

Özis

Osipov

Eibert

2017

International Journal of Antennas and Propagation

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A radome is an integral part of almost every antenna system, protecting antennas and antenna electronics from hostile exterior conditions (humidity, heat, cold, etc.) and nearby personnel from rotating mechanical parts of antennas and streamlining antennas to reduce aerodynamic drag and to conceal antennas from public view. Metamaterials are artificial materials with a great potential for antenna design, and many studies explore applications of metamaterials to antennas but just a few to the design of radomes. This paper discusses the possibilities that metamaterials open up in the design of microwave radomes and introduces the concept of metaradomes. The use of metamaterials can improve or correct characteristics (gain, directivity, and bandwidth) of the enclosed antenna and add new features, like band-pass frequency behavior, polarization transformations, the ability to be switched on/off, and so forth. Examples of applications of metamaterials in the design of microwave radomes available in the literature as well as potential applications, advantages, drawbacks, and still open problems are described.

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Artificial Ceramic Metamaterial with Meshed Grid Structure for Radome Application

Cited by 2 publications

References 8 publications

Characterisation of Low-Temperature Co-Firable Green Tapes for Making Fused Silica Laminated Composites

Characterisation of Low-Temperature Co-Firable Green Tapes for Making Fused Silica Laminated Composites

Metamaterials for Microwave Radomes and the Concept of a Metaradome: Review of the Literature

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