Feeding antennas with proper signals can be difficult. The signal is often described as a voltage, and voltages are not well defined in electromagnetic wave formulations. There are several tricks to model voltage generators in such situations, and one is the magnetic frill. This model shows the basic steps of defining a magnetic frill voltage generator for a dipole antenna, and it also compares the resulting antenna impedance with known results.
標簽： difficult described antennas Feeding
上傳時間： 2013-12-25
上傳用戶：yulg
Feeding antennas with proper signals can be difficult. The signal is often described as a voltage, and voltages are not well defined in electromagnetic wave formulations. There are several tricks to model voltage generators in such situations, and one is the magnetic frill. This model shows the basic steps of defining a magnetic frill voltage generator for a dipole antenna, and it also compares the resulting antenna impedance with known results.
標簽： difficult described antennas Feeding
上傳時間： 2013-12-21
上傳用戶：GavinNeko
一種雙頻微帶天線方案的分析與設計
標簽： antenna
上傳時間： 2015-05-05
上傳用戶：puzzle0612
各種 AND 與門 ANTENNA 天線 BATTERY 直流電源 BELL 鈴,鐘 BVC 同軸電纜接插件 BRIDGE 1 整流橋(二極管) BRIDGE 2 整流橋(集成塊) BUFFER 緩沖器 BUZZER 蜂鳴器 CAP 電容 CAPACITOR 電容 CAPACITOR POL 有極性電容 CAPVAR 可調電容 CIRCUIT BREAKER 熔斷絲 COAX 同軸電纜 CON 插口 CRYSTAL 晶體振蕩器
上傳時間： 2017-04-27
上傳用戶：韓亞楠999
Firstly, this book is set at a level suitable for senior undergraduate and postgraduate students who wish to understand the fundamentals and applications of adaptive array antenna systems. Array fundamentals are described in the text, and examples which demonstrate theoretical concepts are included throughout the book, as well as summaries and questions at the end of each chapter.
標簽： Applications Fundamentals Adaptive Systems Array and
上傳時間： 2020-05-26
上傳用戶：shancjb
In this paper, we consider the channel estimation problem in Millimeter wave (mmWave) wireless systems with large antenna arrays. By exploiting the inherent sparse nature of the mmWave channel, we develop a novel rate-adaptive channel estimation (RACE) algorithm, which can adaptively adjust the number of required channel measurements based on an expected probability of estimation error (PEE).
標簽： Estimation Millimeter Adaptive Approach Channel Systems Rate MIMO Wave for
上傳時間： 2020-05-26
上傳用戶：shancjb
This book gives a comprehensive overview of the technologies for the advances of mobile radio access networks. The topics covered include linear transmitters, superconducting filters and cryogenic radio frequency (RF) front head, radio over fiber, software radio base stations, mobile terminal positioning, high speed downlink packet access (HSDPA), multiple antenna systems such as smart antennas and multiple input and multiple output (MIMO) systems, orthogonal frequency division multiplexing (OFDM) systems, IP-based radio access networks (RAN), autonomic networks, and ubiquitous networks.
標簽： Advances Networks Access Mobile Radio in
上傳時間： 2020-05-26
上傳用戶：shancjb
This book has grown out of my teaching and research at the University of Surrey and out of my previous experiences in companies such as Philips, Ascom and Motorola. It is primarily intended for use by students in master’s level and enhanced final-year under- graduate courses who are specialising in communication systems and wish to understand the principles and current practices of the wireless communication channel, including both antenna and propagation aspects
標簽： Propagation Antennas
上傳時間： 2020-05-26
上傳用戶：shancjb
When we started thinking about writing the first edition of this book a few years ago, we had been working together for more than five years on the borderline between propagation and signal processing. Therefore, it is not surprising that this book deals with propagation models and design tools for MIMO wireless communications. Yet, this book should constitute more than a simple combination of these two domains. It hopefully conveys our integrated understanding of MIMO, which results from endless controversial discussions on various multi-antenna related issues, as well as various interactions with numerous colleagues. Obviously, this area of technology is so large that it is beyond our aim to cover all aspects in details. Rather, our goal is to provide researchers, R&D engineers and graduate students with a comprehensive coverage of radio propagation models and space–time signal processing techniques for multi-antenna, multi-user and multi-cell networks.
上傳時間： 2020-05-28
上傳用戶：shancjb
Due to the asymmetry between the amount of data traffic in the downlink and uplink direction of nowadays and future wireless networks, a proper design of the transceivers in the broadcast channel is inevitable in order to satisfy the users’ demands on data rate and transmission quality. This book deals with the optimi- zation-based joint design of the transmit and receive filters in a MIMO broadcast channel in which the user terminals may be equipped with several antenna ele- ments.
上傳時間： 2020-05-28
上傳用戶：shancjb
