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Distributed Transformers for Broadband Monolith...
41,00 € *
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Distributed Transformers for Broadband Monolithic Millimeter-Wave Integrated Power Amplifiers ab 41 € als Taschenbuch: Dissertationsschrift. Aus dem Bereich: Bücher, Wissenschaft, Technik,

Anbieter: hugendubel
Stand: 25.05.2020
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Distributed Transformers for Broadband Monolith...
41,00 € *
ggf. zzgl. Versand

Distributed Transformers for Broadband Monolithic Millimeter-Wave Integrated Power Amplifiers ab 41 EURO Dissertationsschrift

Anbieter: ebook.de
Stand: 25.05.2020
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Phase Array Antenna on Silicon
49,00 € *
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Demand for broadband wireless communication serviceshas been increasing explosively, driving the surge ofresearch and development activities for futurewireless communication systems with higher data ratesand increased functionality. During the past fewyears, smart (or adaptive) antenna systems adoptingthese array systems have been developed forcommercial as well as military use to suppressmultipath fading, delay spread and cochannelinterferences, resulting in better quality ofservices. However, traditional hybrid array antennasmay be not appropriate for constructing a largephased array antenna since it generally requiresseveral thousand elements fed by a phase shifter aswell as a switch for every antenna element, which iscomplex in nature. This book places emphasis on theimplementation of a phased array antenna system onsilicon utilizing the monolithic microwave integratedcircuit (MMIC) technology. This new approach to theintegration of a phase array antenna system shouldprovide professionals in MMIC and Silicon Technologyfields with a basic view for realizing smart antennasystems with an excellent performance

Anbieter: Dodax
Stand: 25.05.2020
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Broadband Transceiver Circuits for Millimeter-W...
39,00 € *
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In the present work, broadband millimeter wave (mmW) receiver and transmitter circuits for wireless communication in the frequency range around 240 GHz are investigated. The absolute available bandwidths in the mmW frequency range allow high data rates and thus potentially close the technological gap between fast but wired and the comparatively slow and wireless communication. For this purpose, monolithic integrated millimeter wave mixer circuits (MMICs) are designed and analyzed, based on the metamorphic high electron mobility transistor, developed at the Fraunhofer Institute for Applied Solid State Physics (IAF). To simplify the signal generation of the local oscillator, subharmonic mixer circuits are of special interest. Together with other building blocks, these circuits are then integrated in multifunctional receiver and transmitter MMICs for wireless digital communication. These active transmitter and receiver MMICs form the functional core of a 240 GHz radio link, which is able to transmit data with up to 40 Gbit/s in a single-input single-output configuration. As part of a long range demonstrator, they allowed the transmission of up to 24 Gbit/s over a distance of 1.1 km.

Anbieter: Dodax
Stand: 25.05.2020
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Nulling Interferometers for Space-based High-Co...
185,00 CHF *
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High-contrast astronomical imaging has progressed significantly in the past decade. Many of these techniques have been laboratory demonstrated to perform at contrast levels adequate for the detection of Solar System-like planets and dust around nearby stars. None of them, however, have been demonstrated in space. The state of the art in high-contrast imaging systems that have been built for space-based observation, the environment best suited for spectroscopic study of exo-Earths, is the nulling interferometer that was flown on the Planetary Imaging Concept Testbed Using a Rocket Experiment (PICTURE). The PICTURE nulling interferometer, built from multiple optical elements, relies on the incorporation of additional dispersive components in order to deliver the broadband performance preferred for faint object imaging. These elements add to the cost, complexity, and misalignment risk of the instrument. The Monolithic Achromatic Nulling Interference Coronagraph (MANIC) Brian Hicks describe in this thesis the first optic of its kind. He has taken the multiple optical element concept described in earlier works from theory to a flyable monolithic optic. Brian has advanced the state of the art in nulling interferometers by improving optical stability and robustness. Following application of the fabrication method described in this work, the design of MANIC also allows for broader band performance at higher contrast than that achieved with the PICTURE nulling interferometer.

Anbieter: Orell Fuessli CH
Stand: 25.05.2020
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Schwantuschke, D: Modeling of Dispersive Millim...
64,90 CHF *
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In recent years, monolithic integrated power amplifiers based on gallium nitride (GaN) have become an ideal candidate to meet the increasing demand for high solid-state power levels of today's and future millimeter-wave (mm-wave) systems. The heterostructure aluminum gallium nitride/gallium nitride (AlGaN/GaN) high electron mobility transistor devices outperform comparable state-of-the-art semiconductor technologies due to their superior fundamental properties regarding high-power and high-frequency applications. Therefore, a 100 nm AlGaN/GaN technology was developed by the Fraunhofer IAF which is intended for the realization of high-frequency transistors as well as high-power amplifiers for mm-wave frequency applications. The computer-aided design of such power amplifiers requires a scalable nonlinear model of the active transistor devices. Thereby, the nonlinear model must be capable to take low-frequency dispersion and memory effects into account, which are present in the considered mm-wave GaN technology. An elegant way to describe such dispersive devices is a state-space modeling approach. Therefore, this thesis addresses the development of a scalable state-space transistor model and its verification and applicability in terms of the design of two power amplifiers, a broadband and a high-power amplifier.

Anbieter: Orell Fuessli CH
Stand: 25.05.2020
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Nulling Interferometers for Space-based High-Co...
128,90 CHF *
ggf. zzgl. Versand

High-contrast astronomical imaging has progressed significantly in the past decade. Many of these techniques have been laboratory demonstrated to perform at contrast levels adequate for the detection of Solar System-like planets and dust around nearby stars. None of them, however, have been demonstrated in space. The state of the art in high-contrast imaging systems that have been built for space-based observation, the environment best suited for spectroscopic study of exo-Earths, is the nulling interferometer that was flown on the Planetary Imaging Concept Testbed Using a Rocket Experiment (PICTURE). The PICTURE nulling interferometer, built from multiple optical elements, relies on the incorporation of additional dispersive components in order to deliver the broadband performance preferred for faint object imaging. These elements add to the cost, complexity, and misalignment risk of the instrument. The Monolithic Achromatic Nulling Interference Coronagraph (MANIC) Brian Hicks describe in this thesis the first optic of its kind. He has taken the multiple optical element concept described in earlier works from theory to a flyable monolithic optic. Brian has advanced the state of the art in nulling interferometers by improving optical stability and robustness. Following application of the fabrication method described in this work, the design of MANIC also allows for broader band performance at higher contrast than that achieved with the PICTURE nulling interferometer.

Anbieter: Orell Fuessli CH
Stand: 25.05.2020
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Broadband Opto-Electrical Receivers in Standard...
150,90 CHF *
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Broadband Opto-Electrical Receivers in Standard CMOS starts from the basic fundamentals necessary for the design of opto-electronic interface circuits. The book continues with an in-depth analysis of the photodiode, transimpedance amplifier (TIA) and limiting amplifier (LA). To thoroughly understand the light detection mechanisms in silicon, first a one-dimensional and second a two-dimensional model is developed. Analytical design equations are derived to guide the design of the amplifying circuits. For the TIA, the focus is on the sensitivity-speed trade-off. For the LA, a high gain-bandwidth is pursued. Several practical design examples reveal the subtleties and challenges encountered during the design of high-performance analog circuits. Broadband Opto-Electrical Receivers in Standard CMOS covers the total design flow of monolithic CMOS optical receivers. All material is experimentally verified with several CMOS implementations, with ultimately a fully integrated Gbit/s optical receiver front-end including photodiode, TIA and LA. TOC:From the contents Preface. List of Abbreviations and Symbols.- 1 Introduction.- 2 Optical Receiver Fundamentals.- 3 Standard CMOS Photodiodes. 4 Transimpedance Amplifier Design.- 5 Post-Amplifier Design.- 6 CMOS Realizations.- 7 Conclusions.- References. Index.

Anbieter: Orell Fuessli CH
Stand: 25.05.2020
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Nulling Interferometers for Space-based High-Co...
134,99 € *
ggf. zzgl. Versand

High-contrast astronomical imaging has progressed significantly in the past decade. Many of these techniques have been laboratory demonstrated to perform at contrast levels adequate for the detection of Solar System-like planets and dust around nearby stars. None of them, however, have been demonstrated in space. The state of the art in high-contrast imaging systems that have been built for space-based observation, the environment best suited for spectroscopic study of exo-Earths, is the nulling interferometer that was flown on the Planetary Imaging Concept Testbed Using a Rocket Experiment (PICTURE). The PICTURE nulling interferometer, built from multiple optical elements, relies on the incorporation of additional dispersive components in order to deliver the broadband performance preferred for faint object imaging. These elements add to the cost, complexity, and misalignment risk of the instrument. The Monolithic Achromatic Nulling Interference Coronagraph (MANIC) Brian Hicks describe in this thesis the first optic of its kind. He has taken the multiple optical element concept described in earlier works from theory to a flyable monolithic optic. Brian has advanced the state of the art in nulling interferometers by improving optical stability and robustness. Following application of the fabrication method described in this work, the design of MANIC also allows for broader band performance at higher contrast than that achieved with the PICTURE nulling interferometer.

Anbieter: Thalia AT
Stand: 25.05.2020
Zum Angebot