Developments in Antenna Analysis and Design: Volume 1最新文献

Reconfigurable high-gain antennas for wireless communications 用于无线通信的可重构高增益天线

Developments in Antenna Analysis and Design: Volume 1 Pub Date : 2018-11-28 DOI: 10.1049/SBEW543F_CH6

Y. Guo, P. Qin, R. Mittra

{"title":"Reconfigurable high-gain antennas for wireless communications","authors":"Y. Guo, P. Qin, R. Mittra","doi":"10.1049/SBEW543F_CH6","DOIUrl":"https://doi.org/10.1049/SBEW543F_CH6","url":null,"abstract":"In this chapter, an overview of the recent development of reconfigurable high-gain antennas is presented. These antennas range from reconfigurable Yagi antennas, reconfigurable reflectarrays and reconfigurable transmitarrays to reconfigurable PRS antennas. It is demonstrated that PRS antennas are able to reconfigure their frequency, polarization and radiation patterns with high realized gains. Compared with RA arrays, reconfigurable reflectarrays and transmitarrays, it is much easier for reconfigurable PRS antennas to achieve various reconfigurations with a simpler biasing network. In order to fully exploit the diversities of antennas in wireless communication and radar systems, compound reconfigurations of two or three antenna parameters are highly desired. However, there have been no reported products employing such combined RAs. Since PRS antennas have more freedom of parameters (a single feeding source/feeding source arrays and a PRS structure), the above challenge could be addressed by allocating different reconfigurations to different parts. As this work progresses, there is no doubt that fully reconfigurable PRS antennas will deliver significant benefits to practical wireless systems in future.","PeriodicalId":403273,"journal":{"name":"Developments in Antenna Analysis and Design: Volume 1","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114407890","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

Applications of the characteristic mode theory to antenna design 特征模理论在天线设计中的应用

Developments in Antenna Analysis and Design: Volume 1 Pub Date : 2018-11-28 DOI: 10.1049/SBEW543F_CH1

Ting-Yen Shih, N. Behdad

{"title":"Applications of the characteristic mode theory to antenna design","authors":"Ting-Yen Shih, N. Behdad","doi":"10.1049/SBEW543F_CH1","DOIUrl":"https://doi.org/10.1049/SBEW543F_CH1","url":null,"abstract":"In this article discusses the characteristic mode analysis was done to identify and select two eigen-modes of the antenna that are significant (MS > 0.707) and to obtain information on the phase difference of these modes. With this knowledge, antennas with circularly polarized patterns can be designed by combining the two orthogonal characteristic modes with a 90° phase difference. In the wideband antenna case, the MSs of the antenna's characteristic modes were examined to find modes that are significant over a wide bandwidth. Subsequently, the eigen-currents and the eigen-fields of the wideband modes were evaluated to find modes that possess omni-directional radiation patterns, which is an essential property of ultrawideband antennas. In the example of chassis antenna design, two significant chassis modes were excited using the same set of capacitive coupling elements. This was accomplished by understanding the MSs and the eigen-current distributions of the two desired modes, and by placing the capacitive coupling elements at the locations where the magnitudes of the eigen-currents are the weakest for these modes. Loop antennas were mainly used as inductive coupling elements to excite a desired mode of a metallic platform, and a systematic approach to enhance the bandwidth of the platform-based antenna was demonstrated. This approach employed the characteristic mode theory to examine the MSs and the eigen-current distributions of the platform modes, and to calculate the maximum available bandwidth that the desired characteristic mode could offer. The characteristic mode theory can be used as a tool to aid antenna design by allowing engineers to interpret the physical characteristics of the radiator(s).","PeriodicalId":403273,"journal":{"name":"Developments in Antenna Analysis and Design: Volume 1","volume":"171 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126114126","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: 1

Advancements in MIMO antenna systems MIMO天线系统的进展

Developments in Antenna Analysis and Design: Volume 1 Pub Date : 2018-11-28 DOI: 10.1049/SBEW543F_CH4

M. Sharawi

引用次数: 6

Wearable technology and mobile platform for wearable antennas for human health monitoring 用于人体健康监测的可穿戴式天线可穿戴技术及移动平台

Developments in Antenna Analysis and Design: Volume 1 Pub Date : 2018-11-28 DOI: 10.1049/SBEW543F_CH9

V. Varadan, P. Rai, Sechang Oh, P. Kumar, Mouli Ramasamy, R. Harbaugh

{"title":"Wearable technology and mobile platform for wearable antennas for human health monitoring","authors":"V. Varadan, P. Rai, Sechang Oh, P. Kumar, Mouli Ramasamy, R. Harbaugh","doi":"10.1049/SBEW543F_CH9","DOIUrl":"https://doi.org/10.1049/SBEW543F_CH9","url":null,"abstract":"Health and long-term care is a growth area for wearable heath monitoring systems. Wearable diagnostic and therapeutic systems can contribute to timely point-of-care (POC) for patients with chronic health conditions, especially chronic neurological disorders, cardiovascular diseases and strokes that are leading causes of mortality worldwide. Diagnostics and therapeutics for patients under timely POC can save thousands of lives. However, lack of access to minimally intrusive monitoring systems makes timely diagnosis difficult and sometimes impossible. Existing ambulatory recording equipment is incapable of performing continuous remote patient monitoring (RPM) because of the inability for conventional silver-silver-chloride-gel-electrodes to perform long-term monitoring, non-reusability, lack of scalable-standardized wireless communication platforms, and user-friendly design. Recent progress in nanotextile biosensors and mobile platforms has resulted in novel wearable health monitoring systems for neurological and cardiovascular disorders. This chapter discusses nanostructured-textile-based dry electrodes that are better suited for long-term measurement of electrocardiography (ECG), electroencephalography (EEG), electrooculography (EOG), electromyography (EMG), and bioimpedance with very low baseline noise, improved sensitivity, and seamless integration into garments of daily use. It discusses bioelectromagnetic principles of origination and propagation of bioelectric signals and nanosensor functioning, which provide a unique perspective on the development of novel wearable systems that harness their potential. Combined with state-of-the-art embedded wireless network devices and printable fractal antenna to communicate with smartphone, laptop, or directly to remote server through mobile network (GSM, 4G-LTE, GPRS), they can function as wearable wireless health diagnostic systems that are more intuitive to use.","PeriodicalId":403273,"journal":{"name":"Developments in Antenna Analysis and Design: Volume 1","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134473219","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

Reconfigurable leaky-wave antennas 可重构漏波天线

Developments in Antenna Analysis and Design: Volume 1 Pub Date : 2018-11-28 DOI: 10.1049/SBEW543F_CH5

Y. Guo, D. Karmokar, T. Bird

{"title":"Reconfigurable leaky-wave antennas","authors":"Y. Guo, D. Karmokar, T. Bird","doi":"10.1049/SBEW543F_CH5","DOIUrl":"https://doi.org/10.1049/SBEW543F_CH5","url":null,"abstract":"In this chapter, an overview of the recent development of reconfigurable high-gain antennas is presented. These antennas range from reconfigurable Yagi antennas, reconfigurable reflectarrays and reconfigurable transmitarrays to reconfigurable PRS antennas. It is demonstrated that PRS antennas are able to reconfigure their frequency, polarization and radiation patterns with high realized gains. Compared with RA arrays, reconfigurable reflectarrays and transmitarrays, it is much easier for reconfigurable PRS antennas to achieve various reconfigurations with a simpler biasing network. In order to fully exploit the diversities of antennas in wireless communication and radar systems, compound reconfigurations of two or three antenna parameters are highly desired. However, there have been no reported products employing such combined RAs. Since PRS antennas have more freedom of parameters (a single feeding source/feeding source arrays and a PRS structure), the above challenge could be addressed by allocating different reconfigurations to different parts. As this work progresses, there is no doubt that fully reconfigurable PRS antennas will deliver significant benefits to practical wireless systems in future.","PeriodicalId":403273,"journal":{"name":"Developments in Antenna Analysis and Design: Volume 1","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126318065","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

Flexible and wearable antennas 柔性可穿戴天线

Developments in Antenna Analysis and Design: Volume 1 Pub Date : 2018-11-28 DOI: 10.1049/SBEW543F_CH8

Muhammad M. Tahseen, A. Kishk

引用次数: 0

Microfluidically reconfigurable antennas 微流体可重构天线

Developments in Antenna Analysis and Design: Volume 1 Pub Date : 2018-11-28 DOI: 10.1049/SBEW543F_CH7

G. Mumcu

引用次数: 3

Back Matter 回到问题

Developments in Antenna Analysis and Design: Volume 1 Pub Date : 2018-11-28 DOI: 10.1049/sbew543f_bm

引用次数: 0

Design of antennas mounted on complex platforms using the characteristic mode (CM) and characteristic basis (CB) function methods 基于特征模和特征基函数方法的复杂平台天线设计

Developments in Antenna Analysis and Design: Volume 1 Pub Date : 2018-11-28 DOI: 10.1049/SBEW543F_CH2

R. Mittra, Ashwani Kumar, C. Li

{"title":"Design of antennas mounted on complex platforms using the characteristic mode (CM) and characteristic basis (CB) function methods","authors":"R. Mittra, Ashwani Kumar, C. Li","doi":"10.1049/SBEW543F_CH2","DOIUrl":"https://doi.org/10.1049/SBEW543F_CH2","url":null,"abstract":"In this chapter, we will discuss two types of antenna design strategies, tailored for two different categories of antenna design problems. First of these will address the well-known problem of designing a multiband antenna, to be mounted on a mobile phone platform, to simultaneously cover the typical communication bands, for example, LTE, GSM, Bluetooth, WiMax, etc., with only a single antenna tailored for the platform, as is usually the requirement, except for MIMO applications. Next, we will turn to the problem of designing a plurality of antennas to be located on a complex platform to achieve certain radiation characteristics deemed desirable by the user, in order to receive the desired signals while suppressing the interfering ones. While several methods for radiation pattern synthesis of antennas exist in literature, They are only applicable to specific antenna geometries and they typically do not handle complex structures. The pattern synthesis problem is of great interest in many practical applications, for example, global positioning system (GPS) antenna design, and locating multiple antennas mounted on the rooftop of a large vehicle, or on the topside of a ship.","PeriodicalId":403273,"journal":{"name":"Developments in Antenna Analysis and Design: Volume 1","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132775816","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

Meta-atoms and artificially engineered materials for antenna applications 天线应用的元原子和人工工程材料

Developments in Antenna Analysis and Design: Volume 1 Pub Date : 2018-11-28 DOI: 10.1049/SBEW543F_CH10

R. Arya, Shiyu Zhang, Shaileshachandra Pandey, Ashwani Kumar, Y. Vardaxoglou, W. Whittow, R. Mittra

{"title":"Meta-atoms and artificially engineered materials for antenna applications","authors":"R. Arya, Shiyu Zhang, Shaileshachandra Pandey, Ashwani Kumar, Y. Vardaxoglou, W. Whittow, R. Mittra","doi":"10.1049/SBEW543F_CH10","DOIUrl":"https://doi.org/10.1049/SBEW543F_CH10","url":null,"abstract":"In this article chapter, we discuss different ways to mitigate some of the problems encountered with MTMs, and present strategies for artificially synthesizing dielectric materials that are broadband as well as low-loss; hence, they are useful for real-world antenna applications involving low-profile flat lenses and reflectarrays, for example. The key to circumventing the difficulties with MTM, which we have identified above, is to steer clear of the common practice of using resonant inclusions or “particles”to achieve extreme material properties, negative index; and, zero index. Our strategy is to develop antenna designs that only call for material parameters that are realistic, so that they can either be acquired off-the-shelf, or by slightly tweaking the available materials by embedding small patches or apertures, often referred to as “particles”, whose dimensions are far removed from the resonance range. This obviates the problems of dispersion, narrow bandwidths and losses that plague the MTMs, at least those that fall in the “exotic”category, for example, the doublenegative or DNG type. Although the RO approach leads to dielectric-only designs that do not need to use magnetic materials, these designs still typically require dielectric materials that may not be available off-the-shelf.","PeriodicalId":403273,"journal":{"name":"Developments in Antenna Analysis and Design: Volume 1","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132047628","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: 4