Compact Diversity Antennas for Wireless Communications
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DOWNLOAD EBOOKHKUST Call Number: Thesis ELEC 2000 Ko.
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Compact Antennas for Wireless Communications and Terminals
Author: Jean-Marc Laheurte
Publisher: John Wiley & Sons
Published: 2012-12-27
Total Pages: 264
ISBN-13: 1118603400
DOWNLOAD EBOOKCompact Antennas for Wireless Communications and Terminals deals with compact microwave antennas and, more specifically, with the planar version of these antennas. Planar antennas are the most appropriate type of antenna in modern communication systems and more generally in all applications requiring miniaturization, integration and conformation such as in mobile phone handsets. The book is suitable for students, engineers and scientists eager to understand the principles of planar and small antennas, their design and fabrication issues, and modern aspects such as UWB antennas, reconfigurable antennas and diversity issues.
MIMO Antennas for Wireless Communication
Author: Leeladhar Malviya
Publisher: CRC Press
Published: 2020-12-15
Total Pages: 220
ISBN-13: 1000294951
DOWNLOAD EBOOKThe desired objective of this book is to investigate diversity and mutual coupling effects on MIMO antenna designs for WLAN/WiMAX/LTE applications, controlled with diversity and ground modification techniques including equivalent circuit diagrams. Diversity techniques in MIMO antennas leading to the performance improvement ratings are demonstrated and deliberated. The book contributes towards the development of 2:1 VSWR MIMO antennas with diversity techniques for indoor/outdoor applications for high data rate, QOS, and SNR. The improved MIMO antenna structures are investigated and presented in this book including part of massive MIMO to provide the important aspects of emerging technology. Aimed at researchers, professionals and graduate students in electrical engineering, electromagnetics, communications and signal processing including antenna theory and design, smart antennas, communication systems, this book: Investigates real time MIMO antenna designs for WLAN/WiMAX/LTE applications. Covers effects of ECC, MEG, TARC, and equivalent circuit. Addresses the coupling and diversity aspects of antenna design problem for MIMO systems. Focus on the MIMO antenna designs for the real time applications. Exclusive chapter on 5G Massive MIMO along with case studies throughout the book.
Diversity Antennas for Wireless LAN and Mobile Communication Handsets
Author: Ali Khaleghi
Publisher:
Published: 2006
Total Pages: 278
ISBN-13:
DOWNLOAD EBOOKHigh signal to noise ratio (SNR) levels are required to provide high data rate transmission for the next generation of mobile and wireless devices. In order to provide high SNR and to cope with the environmental impacts on the data transmission, diversity techniques are used. This thesis investigates the performance enhancement that can be delivered by including more antennas in the system. The performance enhancement is dependent on the characteristics of the antennas and on the wave propagation environment. Different mobile propagation channels are investigated and a fading simulator is improved. The fading simulator is combined with the spherical models for the field angle of arrivals to be able to calculate the performance of wireless terminals with multiple antennas. The verification of the computations is performed by measurements conducted in Supelec reverberation chamber. Furthermore, the statistical characteristics of the multipath fading signals in the reverberation chamber are investigated in detail.Using the proposed methods, the antenna diversity performance enhancements in relation to the relative displacement and orientation of the antennas and various spherical field models are studied. Furthermore the gain improvements for the channels with correlated signals and unbalanced powers are investigated. Antenna diversity is studied for two parallel dipole antennas in relation to the separation distance by the simulations and measurements in reverberation chamber. Radiation pattern phase diversity is depicted for the coupled antennas. A simple and compact mobile phone antenna diversity system is developed and the performance including phantom human head model is investigated through mean effective gain, signals correlation coefficient and diversity gain.Four different and compact antenna diversity systems are designed, simulated and manufactured for wireless LAN applications. The antennas make use of polarization, pattern and phase diversities for signals reception in multipath channels. The performance enhancement of the antenna systems are explored by the simulations and the measurements.
Design and Evaluation of Diversity Antennas and Slot Arrays
Author: Maryam Razmhosseini
Publisher:
Published: 2021
Total Pages: 0
ISBN-13:
DOWNLOAD EBOOKThe increasing frequencies used in wireless communications now allow multi-element antennas (MEAs) to be physically small enough to fit on hand-held terminals. The role of the antenna is to transform between free-space waves and electronic signals, and its critical importance is that this transformation is the biting constraint for the performance of the entire wireless system. For example, two basic resources for wireless communications arebandwidth and spatial support (size of the terminal), and the electrical size of the antenna fundamentally governs the tradeoff between these. Especially for mobile communications, the need for compact terminals and the demand for spectral and power efficiencies have been drivers of the adoption of MEAs for diversity and other multiple-input, multipleouput (MIMO) techniques. However, a methodology for the general design and evaluation for MEAs is not yet well established. This thesis addresses the evaluation of MEAs for diversity/MIMO, and also investigates single-port MEA designs comprising slotted waveguide arrays. The first part reviews techniques for antenna diversity/MIMO. It presents discussion and interpretation of the still-evolving diversity metrics, and benchmark antenna designs with new numerical and physical results for better understanding the evaluation processes. Pattern measurement is particularly challenging, but patterns are critical antenna parameters and are used in diversity performance metrics. The practical accuracy of pattern measurements is therefore included in the thesis. The second part looks into slot antennas for MEAs which strive to be compact, wideband, high efficiency and have low-cost integration with the terminal. Some applications call for antennas on, or within, an electrically small, curved metallic platform, such as a mast, or the struts of unmanned aerial vehicles, drones and bicycle frames. New designs of slotted coaxial waveguide antennas are presented which are more compact and have wider bandwidth than previously known designs.
Antenna Systems for Modern Wireless Devices
Author: Shiban K Koul
Publisher: Springer
Published: 2024-08-11
Total Pages: 0
ISBN-13: 9789819733682
DOWNLOAD EBOOKThis book presents up-to-date information about WLAN antenna designs for students, researchers, and professionals who want to design radiating systems to be deployed for practical coverage. The book primarily focuses on pattern diversity antennas. Pattern diversity antennas are very vital in wireless communication. High correlation between multiple signals can result in low data throughput which can be solved by using antennas with pattern diversity. Beam scanning antennas and their variants are also described in detail. Pattern diversity antenna systems with multiport feeds are also comprehensively discussed in this book. For a multiport system to maintain a reasonable link budget, equal antenna gains are preferred for the required antenna coverage. The book further describes the latest techniques to enhance and equalize the antenna gain within a compact radiating system. With increasing demand for faster connectivity with minimum path loss, the demand for high-gain antennas is rapidly increasing. Thereby a detailed discussion on gain enhancement with the latest high-gain antenna designs is requisite while describing WLAN antennas. Some antenna designs discussed in the book are based on additive manufacturing for their design and fabrication. Additive manufacturing is a much sought-after technology today that allows rapid development of antennas at an affordable cost. Many recent WLAN antennas make use of this technology to develop versatile antenna designs. Finally, the book includes a section on wide-band antenna designs. Antenna designs that reduce the scanning loss are also discussed.
Printed Antennas for Wireless Communications
Author: Rod Waterhouse
Publisher: John Wiley & Sons
Published: 2008-03-11
Total Pages: 472
ISBN-13: 9780470512258
DOWNLOAD EBOOKPrinted antennas, also known as microstrip antennas, have a variety of beneficial properties including mechanical durability, conformability, compactness and cheap manufacturing costs. As such, they have a range of applications in both the military and commercial sectors, and are often mounted on the exterior of aircraft and spacecraft as well as incorporated into mobile radio communication devices. Printed Antennas for Wireless Communications offers a practical guide to state-of-the-art printed antenna technology used for wireless systems. Contributions from renowned global experts within both academia and industry enable the reader to design printed antennas and associated technologies, and offer valuable insights into important breakthroughs in these areas. Divided into 3 sections covering fundamental wideband printed radiating elements for wireless systems, small printed antennas for wireless systems, and advanced concepts and applications in wireless systems. Provides experimental data and applies theoretical models to present design performance trends and to give the reader an in-depth coverage of the area. Presents summaries of different approaches used in solving wireless systems such as WPAN (wireless personal area network) and MIMO (multi-input/ multi-output), offering the reader an overall perspective of the pros and cons of each. Focuses on practical design, examples and ‘real world’ solutions. Printed Antennas for Wireless Communications offers an excellent insight on printed antennas from the theoretical to the practical; hence it will appeal to practicing design engineers within commercial and governmental/ military organistations, as well as postagraduate students and researchers in communications technology
Compact Antennas for High Data Rate Communication
Author: Jagannath Malik
Publisher: Springer
Published: 2017-08-01
Total Pages: 114
ISBN-13: 3319631756
DOWNLOAD EBOOKThis book discusses the development of promising technologies for compact antennas for high data-rate communications. It discusses and analyzes the design of compact ultra-wideband (UWB) and multiple input, multiple output (MIMO) antennas, providing essential know-how for designers, practicing engineers and scientists. These wireless communication technologies enable consumers to have convenient access to a wide range of services – anytime, anywhere. And the introduction of wireless mobile access points eliminates the limitations to communication imposed by geographical location. The Internet has allowed people to access and share information much more rapidly, but in order to achieve higher data rates with the limited available resources and imposed constraints, wireless communication technology needs to be pushed beyond the physical limits of the propagation channel. This book contributes to achieving this goal.
Compact Multifunctional Antennas for Wireless Systems
Author: Eng Hock Lim
Publisher: John Wiley & Sons
Published: 2012-05-22
Total Pages: 244
ISBN-13: 0470407328
DOWNLOAD EBOOKOffers an up-to-date description of modern multifunctional antenna systems and microwave components Compact multifunctional antennas are of great interest in the field of antennas and wireless communication systems, but there are few, if any, books available that fully explore the multifunctional concept. Divided into six chapters, Compact Multifunctional Antennas for Wireless Systems encompasses both the active and passive multifunctional antennas and components for microwave systems. It provides a systematic, valuable reference for antenna/microwave researchers and designers. Beginning with such novel passive components as antenna filters, antenna packaging covers, and balun filters, the book discusses various miniaturization techniques for the multifunctional antenna systems. In addition to amplifying and oscillating antennas, the book also covers design considerations for frequency- and pattern-reconfigurable antennas. The last chapter is dedicated to the field of solar cell integrated antennas. Inside, readers will find comprehensive chapters on: Compact Multifunctional Antennas in Microwave Wireless Systems Multifunctional Passive Integrated Antennas and Components Reconfigurable Antennas Receiving Amplifying Antennas Oscillating Antennas Solar cell integrated Antennas Aimed at professional engineers and researchers designing compact antennas for wireless applications, Compact Multifunctional Antennas for Wireless Systems will prove to be an invaluable tool.
Next-Generation Antennas
Author: Prashant Ranjan
Publisher: John Wiley & Sons
Published: 2021-07-19
Total Pages: 306
ISBN-13: 1119792746
DOWNLOAD EBOOKNEXT-GENERATION ANTENNAS: ADVANCES AND CHALLENGES The first book in this exciting new series, written and edited by a group of international experts in the field, this exciting new volume covers the latest advances and challenges in the next generation of antennas. Antenna design and wireless communication has recently witnessed their fastest growth period ever in history, and these trends are likely to continue for the foreseeable future. Due to recent advances in industrial applications as well as antenna, wireless communication, and 5G technology, we are witnessing a variety of developing and expanding new technologies. Compact and low-cost antennas are increasing the demand for ultra-wide bandwidth in next-generation (5G) wireless communication systems and the Internet of Things (IoT). Enabling the next generation of high-frequency communication, various methods have been introduced to achieve reliable high data rate communication links and enhance the directivity of planar antennas. 5G technology can be used in many applications, such as in smart city applications and in smartphones. This technology can satisfy the fast rise in user and traffic capacity in mobile broadband communications. Therefore, different planar antennas with intelligent beamforming capability play an important role in these areas. The purpose of this book is to present the advanced technology, developments, and challenges in antennas for next-generation antenna communication systems. This book covers advances in next-generation antenna design and application domain in all related areas. It is a detailed overview of cutting-edge developments and other emerging topics and their applications in all areas of engineering that have achieved great accuracy and performance with the help of the advancement and challenges in next-generation antennas. This outstanding new volume: Covers all the latest developments and future aspects of antenna communication Is concisely written, lucid, and comprehensive, practical application-based, with many informative graphics and schematics Will help students, researchers, as well as systems designers to understand fundamental antenna design and wireless communication Compares different approaches in antenna design
