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Compact, Efficient, and Wideband Near-Field Resonant Parasitic Filtennas 紧凑，高效，宽带近场共振寄生滤波器
Electromagnetic Materials and Devices Pub Date : 2018-12-04 DOI: 10.5772/INTECHOPEN.82305
M. Tang, Yang Wang, Ting Shi
{"title":"Compact, Efficient, and Wideband Near-Field Resonant Parasitic Filtennas","authors":"M. Tang, Yang Wang, Ting Shi","doi":"10.5772/INTECHOPEN.82305","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.82305","url":null,"abstract":"As a hybrid component in RF front-end systems, filtennas possess the distinctive advantages of simultaneously combining filtering and radiating performance characteristics. Consequently, filtennas not only save space and costs but also reduce transmission losses. In this chapter, three sorts of filtennas have been proposed: the first sort is band-pass/band-stop filtennas, which are mainly realized by assembling band-pass/band-stop filters and antennas to achieve the combined functions; the second sort is multi-resonator-cascaded filtennas, which are obtained by altering the coupled-resonators in the last stage of the filters to act as the radiating elements; and the third sort is near-field resonant parasitic, bandwidth-enhanced filtennas, which are accomplished through organically combining radiator and filtering structures. For the second and third sorts, it is worth noting that the design methods witness significant electrical size reduction without degrading the radiation performance of the filtennas in general.","PeriodicalId":247660,"journal":{"name":"Electromagnetic Materials and Devices","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128725076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Lightweight Electromagnetic Interference Shielding Materials and Their Mechanisms 轻型电磁干扰屏蔽材料及其机理
Electromagnetic Materials and Devices Pub Date : 2018-12-02 DOI: 10.5772/INTECHOPEN.82270
Liying Zhang, S. Bi, Ming Liu
{"title":"Lightweight Electromagnetic Interference Shielding Materials and Their Mechanisms","authors":"Liying Zhang, S. Bi, Ming Liu","doi":"10.5772/INTECHOPEN.82270","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.82270","url":null,"abstract":"Motivated by the increase of stress over electromagnetic pollution issues arising from the fast-growing development and need for electronic and electrical devices, the demand for materials with high electromagnetic interference (EMI) shielding performance has become more urgently. Considering the energy consumption in real applications, lightweight EMI shielding materials has been attentive in this field of research. In this chapter, first of all, the EM theory will be briefly discussed. Secondly, the EMI shielding performance and corresponding mechanisms of three categories of lightweight materials, such as polymer-based composites, foams and aerogels, are reviewed. Finally, the summary and conclusions of this field will be addressed.","PeriodicalId":247660,"journal":{"name":"Electromagnetic Materials and Devices","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130424020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 27
Phase-Shift Transmission Line Method for Permittivity Measurement and Its Potential in Sensor Applications 介电常数测量的相移传输线法及其在传感器中的应用潜力
Electromagnetic Materials and Devices Pub Date : 2018-11-15 DOI: 10.5772/INTECHOPEN.81790
V. Radonić, N. Cselyuszka, V. Crnojević-Bengin, G. Kitic
{"title":"Phase-Shift Transmission Line Method for Permittivity Measurement and Its Potential in Sensor Applications","authors":"V. Radonić, N. Cselyuszka, V. Crnojević-Bengin, G. Kitic","doi":"10.5772/INTECHOPEN.81790","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.81790","url":null,"abstract":"This chapter offers a detailed insight into a dielectric characterization of the materials based on the phase-shift measurements of the transmission signal. The chapter will provide in-depth theoretical background of the phase-shift transmission line measurement in the microstrip architecture and determination of dielectric permittivity of design under test for several measurement configurations. Potential of the phase-shift method will be demonstrated through applications in the characterization of an unknown dielectric constant in multilayered structure, realization of the soil moisture sensor, and sensor for determination of the dielectric constant of a fluid in microfluidic channel. Moreover, specific techniques for increasing the phase shift based on the electromagnetic bandgap structure, the aperture in the ground plane and the left-handed effect will be presented. In the end, the realization of simple in-field detection device for determination of permittivity based on the phase-shift measurement will be demonstrated.","PeriodicalId":247660,"journal":{"name":"Electromagnetic Materials and Devices","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124027506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Optical Propagation in Magneto-Optical Materials 磁光材料中的光传播
Electromagnetic Materials and Devices Pub Date : 2018-11-09 DOI: 10.5772/INTECHOPEN.81963
L. Alcantara
{"title":"Optical Propagation in Magneto-Optical Materials","authors":"L. Alcantara","doi":"10.5772/INTECHOPEN.81963","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.81963","url":null,"abstract":"Magneto-optical materials present anisotropy in the electrical permittivity controlled by a magnetic field, which affects the propagation characteristics of light and stands out in the design of nonreciprocal devices, such as optical isolators and circulators. Based on Maxwell ’ s equations, this chapter focuses on the wave propagation in magneto-optical media. The following cases are covered: The propagation of a plane wave in an unbounded magneto-optical medium, where the phenomenon of Faraday rotation is discussed, and the guided propagation in planar magnetooptical waveguides with three and five layers, highlighting the phenomenon of nonreciprocal phase shift and its potential use on the design of nonreciprocal optical devices.","PeriodicalId":247660,"journal":{"name":"Electromagnetic Materials and Devices","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122975102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The Influence of the Dielectric Materials on the Fields in the Millimeter and Infrared Wave Regimes 介电材料对毫米波和红外光场的影响
Electromagnetic Materials and Devices Pub Date : 2018-11-05 DOI: 10.5772/INTECHOPEN.80943
Z. Menachem
{"title":"The Influence of the Dielectric Materials on the Fields in the Millimeter and Infrared Wave Regimes","authors":"Z. Menachem","doi":"10.5772/INTECHOPEN.80943","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.80943","url":null,"abstract":"This chapter presents the influence of the dielectric materials on the output field for the millimeter and infrared regimes. This chapter presents seven examples of the discontinuous problems in the cross section of the straight waveguide. Two different geometrical of the dielectric profiles in the cross section of the straight rectangular and circular waveguides will be proposed to understand the behavior of the output fields. The two different methods for rectangular and circular waveguides and the techniques to calculate any geometry in the cross section are very important to understand the influence of the dielectric materials on the output fields. The two different methods are based on Laplace and Fourier transforms and the inverse Laplace and Fourier transforms. Laplace transform on the differential wave equations is needed to obtain the wave equations and the output fields that are expressed directly as functions of the transmitted fields at the entrance of the waveguide. Thus, the Laplace transform is necessary to obtain the comfortable and simple input-output connections of the fields. The applications are useful for straight waveguides in the millimeter and infrared wave regimes.","PeriodicalId":247660,"journal":{"name":"Electromagnetic Materials and Devices","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132415760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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