Xem 1-9 trên 9 kết quả Microwave components
  • Microwaves are generally considered to be a specific part of the wide radio frequency spectrum. The band from 300 MHz to 30 GHz is typically considered to be “microwaves,” for example by the Institute of Electrical end Electronics Engineers (IEEE), although many of us prefer to set the lower limit somewhat higher—perhaps at 1 or even 3 GHz. Above 30 GHz, the term “millimeter waves” is used. High school physics suggests that we are talking about wavelengths ranging from about 30 cm down to 10 mm...

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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....

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  • This book is based on recent research work conducted by the authors dealing with the design and development of active and passive microwave components, integrated circuits and systems. It is divided into seven parts. In the first part comprising the first two chapters, alternative concepts and equations for multiport network analysis and characterization are provided. A thru-only de-embedding technique for accurate on-wafer characterization is introduced.

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  • In instructional materials, the term simple is often tossed around loosely. Sometimes it may mean that fewer equations are used than in a typical textbook or paper. Other times, it may mean that the subject is easily understood by the author. But what does simple really mean? If you looked up the term in a dictionary, you might find this definition: “not complex or complicated; easily understood; intelligible, clear.”

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  • Attenuators are used in a wide variety of applications and can satisfy almost any requirement where a reduction in power is needed. Attenuators are used to extend the dynamic range of devices such as power meters and amplifiers, reduce signal levels to detectors, match circuits and are used daily in lab applications to aid in product design. Attenuators are also used to balance out transmission lines that otherwise would have unequal signal levels. MECA offers a wide selection of attenuators designed to exceed commercial specifications.

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  • With the rapid implementation of Intelligent Transportation System (ITS) applications throughout the world, the surface transportation system has become more complex and dependent on an extensive grid of roadways, computing devices, and wireless and wired communication networks. Authors from several countries have contributed chapters that focus on different components of ITS and their applications.

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  • High integration and low power consumption 15 radio carriers at the Abis sharing an E1 for transmission (15:1) Support various transmission modes and complex topologies, e.g. SDH, E1, microwave, satellite etc. 1-minute fast startup Support GSM900,DCS1800,EGSM and RGSM Support GSM PHASE 1、PHASE 2 and PHASE 2+ Support GPRS and EDGE Support baseband hopping and RF hopping Support FR, HR, EFR and AMR Support A5/1 and A5/2 encryption/decryption

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  • Various Components and Their System Parameters An RF and microwave system consists of many different components connected by transmission lines. In general, the components are classified as passive components and active (or solid-state) components. The passive components include resistors, capacitors, inductors, connectors, transitions, transformers, tapers, tuners, matching networks, couplers, hybrids, power dividers=combiners, baluns, resonators, filters, multiplexers, isolators, circulators, delay lines, and antennas. ...

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  • Antenna Systems The study of antennas is very extensive and would need several texts to cover adequately. In this chapter, however, a brief description of relevant performances and design parameters will be given for introductory purposes. An antenna is a component that radiates and receives the RF or microwave power. It is a reciprocal device, and the same antenna can serve as a receiving or transmitting device. Antennas are structures that provide transitions between guided and free-space waves. ...

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