Ridge Waveguides and Passive Microwave Components

Ridge Waveguides and Passive Microwave Components PDF

Author: J. Helszajn

Publisher: IET

Published: 2000-06-30

Total Pages: 342

ISBN-13: 0852967942

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This book collects much of Helszajn's work (formerly, Heriot-Watt University) and includes closed-form and finite element calculations of the propagation constant, attenuation and mode spectrum for the ridge waveguide, and power-current and power-voltage definitions of impedance. Circular polarization is also treated. Propagation properties where the waveguide has a dielectric filler are calculated. The treatment is then extended to more complex designs, including quadruple ridge waveguides with and without a gyromagnetic filler. The text includes descriptions of many of the passive devices which can be realized using these waveguides, including isolators, phase shifters, and circulators. c. Book News Inc.

Broadband Ridge Waveguides and Components

Broadband Ridge Waveguides and Components PDF

Author: Philip Levine

Publisher:

Published: 1961

Total Pages: 104

ISBN-13:

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The design and development are presented of microwave components in double rounded ridge waveguide for the 11.0 to 26.5 gc frequency range. The components developed operate over the frequency range now covered by portions of 3 standard rectangular waveguides namely RG52/U, 11.0 to 12.4 gc; RG-91/U, 12.4 to 18 gc; and RG-53/U, 18 to 26.5 gc. The components developed are comparable in performance to rectangular waveguide components and may be used for test or systems application. Theoretical and empirical design procedures are discussed for the various components and their final performance data is given.

Analysis and Design of Microwave Devices Based on Ridge Gap Waveguide Technology

Analysis and Design of Microwave Devices Based on Ridge Gap Waveguide Technology PDF

Author: Shokry I. Shamseldin

Publisher:

Published: 2016

Total Pages: 199

ISBN-13:

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The usage of high frequency microwave devices is rapidly increasing with the advances achieved in the communication systems. However, the standard guiding structures have high losses such as microstrip technology, or difficulty in manufacturing such as in the case of waveguides. The newly developed ridge gap waveguide (RGW) technology resolves the problems above as it has low losses and does not require electrical contacts as required in the waveguides. The concept of RGW is simple as it allows the wave propagations in the guiding part and eliminates the leakage in all other directions. The region that surrounds the ridge consists of two parallel surfaces; one is a perfect electric conductor (PEC) and the second is a perfect magnetic conductor (PMC). The gap between the two surfaces should be less than a quarter wavelength. Periodic conducting nails realize the PMC that practically has a possible bandwidth 2.5:1 and in some cases exceeds 3:1. Usually, the design of these surfaces relies on the unit cell analysis that is based on determining its band gap, the estimation of the band gap is performed numerically. The band gap of the cell is the operating bandwidth of the complete structure. For the first time, we presented a method to measure the band gap from s-parameter measurements. Utilization of the broadband characteristics strongly depends on the proper design of the transition between the RGW and the standard guiding structures and connectors. Most of the available transitions make use of around one-third of the possible bandwidth. Therefore, we present new transitions that utilize the whole possible bandwidth of the RGW. The presented work can be divided into four major parts. Several microwave components are designed based on the RGW such as power divider, hybrid couplers, and a circulator. New methods are presented for efficient and accurate design of these components. One of the main contributions is related to the RGW circulator design; it's an accurate design procedure that can be used with other technologies as well. In addition, a new setup to measure the low relative permittivity of thin materials such as fabrics is presented. An example of a leaky wave antenna using split slot arrays is presented. These studies highlight the RGW advantages and can be considered as a step towards the standardization of this technology.

Passive Microwave Components and Antennas

Passive Microwave Components and Antennas PDF

Author: Vitaliy Zhurbenko

Publisher: BoD – Books on Demand

Published: 2010-04-01

Total Pages: 568

ISBN-13: 9533070838

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Modelling and computations in electromagnetics is a quite fast-growing research area. The recent interest in this field is caused by the increased demand for designing complex microwave components, modeling electromagnetic materials, and rapid increase in computational power for calculation of complex electromagnetic problems. The first part of this book is devoted to the advances in the analysis techniques such as method of moments, finite-difference time- domain method, boundary perturbation theory, Fourier analysis, mode-matching method, and analysis based on circuit theory. These techniques are considered with regard to several challenging technological applications such as those related to electrically large devices, scattering in layered structures, photonic crystals, and artificial materials. The second part of the book deals with waveguides, transmission lines and transitions. This includes microstrip lines (MSL), slot waveguides, substrate integrated waveguides (SIW), vertical transmission lines in multilayer media as well as MSL to SIW and MSL to slot line transitions.

Microwave and Millimetre-Wave Design for Wireless Communications

Microwave and Millimetre-Wave Design for Wireless Communications PDF

Author: Ian Robertson

Publisher: John Wiley & Sons

Published: 2016-06-29

Total Pages: 608

ISBN-13: 1118917308

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This book describes a full range of contemporary techniques for the design of transmitters and receivers for communications systems operating in the range from 1 through to 300 GHz. In this frequency range there is a wide range of technologies that need to be employed, with silicon ICs at the core but, compared with other electronics systems, a much greater use of more specialist devices and components for high performance – for example, high Q-factor/low loss and good power efficiency. Many text books do, of course, cover these topics but what makes this book timely is the rapid adoption of millimetre-waves (frequencies from 30 to 300 GHz) for a wide range of consumer applications such as wireless high definition TV, “5G” Gigabit mobile internet systems and automotive radars. It has taken many years to develop low-cost technologies for suitable transmitters and receivers, so previously these frequencies have been employed only in expensive military and space applications. The book will cover these modern technologies, with the follow topics covered; transmitters and receivers, lumped element filters, tranmission lines and S-parameters, RF MEMS, RFICs and MMICs, and many others. In addition, the book includes extensive line diagrams to illustrate circuit diagrams and block diagrams of systems, including diagrams and photographs showing how circuits are implemented practically. Furthermore, case studies are also included to explain the salient features of a range of important wireless communications systems. The book is accompanied with suitable design examples and exercises based on the Advanced Design System – the industry leading CAD tool for wireless design. More importantly, the authors have been working with Keysight Technologies on a learning & teaching initiative which is designed to promote access to industry-standard EDA tools such as ADS. Through its University Educational Support Program, Keysight offers students the opportunity to request a student license, backed up with extensive classroom materials and support resources. This culminates with students having the chance to demonstrate their RF/MW design and measurement expertise through the Keysight RF & Microwave Industry-Ready Student Certification Program. www.keysight.com/find/eesof-university www.keysight.com/find/eesof-student-certification

Thermal Microwave Radiation

Thermal Microwave Radiation PDF

Author: Institution of Engineering and Technology

Publisher: IET

Published: 2006-05-19

Total Pages: 583

ISBN-13: 0863415733

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Combines theoretical concepts with experimental results on thermal microwave radiation to increase the understanding of the complex nature of terrestrial media. Emphasising on radiative transfer models, this book covers the terrestrial aspects, from clear to cloudy atmosphere, precipitation, ocean and land surfaces, vegetation, snow and ice.

Advanced Electromagnetic Computation

Advanced Electromagnetic Computation PDF

Author: Dikshitulu K. Kalluri

Publisher: CRC Press

Published: 2017-11-28

Total Pages: 362

ISBN-13: 1498733417

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Advanced Electromagnetic Computation with MATLAB® discusses commercial electromagnetic software, widely used in the industry. Algorithms of Finite Differences, Moment method, Finite Element method and Finite Difference Time Domain method are illustrated. Hand-computed simple examples and MATLAB-coded examples are used to explain the concepts behind the algorithms. Case studies of practical examples from transmission lines, waveguides, and electrostatic problems are given so students are able to develop the code and solve the problems. Two new chapters including advanced methods based on perturbation techniques and three dimensional finite element examples from radiation scattering are included.

Optical Switching

Optical Switching PDF

Author: Dalia Nandi

Publisher: John Wiley & Sons

Published: 2022-07-06

Total Pages: 378

ISBN-13: 1119819253

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OPTICAL SWITCHING Comprehensive coverage of optical switching technologies and their applications in optical networks Optical Switching: Device Technology and Applications in Networks delivers an accessible exploration of the evolution of optical networks with clear explanations of the current state-of-the-art in the field and modern challenges in the development of Internet-of-Things devices. A variety of optical switches—including MEMS-based, magneto, photonic, and SOA-based—are discussed, as is the application of optical switches in networks. The book is written in a tutorial style, easily understood by both undergraduate and graduate students. It describes the fundamentals and recent developments in optical switch networks and examines the architectural and design challenges faced by those who design and construct emerging optical switch networks, as well as how to overcome those challenges. The book offers ways to assess and analyze systems and applications, comparing a variety of approaches available to the reader. It also provides: A thorough introduction to switch characterization, including optical, electro optical, thermo optical, magneto optical, and acoustic-optic switches Comprehensive explorations of MEMS-based, SOA-based, liquid crystal, photonic crystal, and optical electrical optical (OEO) switches Practical discussions of quantum optical switches, as well as nonlinear optical switches In-depth examinations of the application of optical switches in networks, including switch fabric control and optical switching for high-performance computing Perfect for researchers and professionals in the fields of telecommunications, Internet of Things, and optoelectronics, Optical Switching: Device Technology and Applications in Networks will also earn a place in the libraries of advanced undergraduate and graduate students studying optical networks, optical communications, and sensor applications.

Ultra-Wideband, Short-Pulse Electromagnetics 10

Ultra-Wideband, Short-Pulse Electromagnetics 10 PDF

Author: Frank Sabath

Publisher: Springer Science & Business Media

Published: 2014-02-07

Total Pages: 499

ISBN-13: 1461495008

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This book presents contributions of deep technical content and high scientific quality in the areas of electromagnetic theory, scattering, UWB antennas, UWB systems, ground penetrating radar (GPR), UWB communications, pulsed-power generation, time-domain computational electromagnetics, UWB compatibility, target detection and discrimination, propagation through dispersive media, and wavelet and multi-resolution techniques. Ultra-wideband (UWB), short-pulse (SP) electromagnetics are now being used for an increasingly wide variety of applications, including collision avoidance radar, concealed object detection, and communications. Notable progress in UWB and SP technologies has been achieved by investigations of their theoretical bases and improvements in solid-state manufacturing, computers, and digitizers. UWB radar systems are also being used for mine clearing, oil pipeline inspections, archeology, geology, and electronic effects testing. Like previous books in this series, Ultra-Wideband Short-Pulse Electromagnetics 10 serves as an essential reference for scientists and engineers working in these applications areas.