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highest-performance

射頻和微波系統的建模與仿真

Abstract: This application note describes system-level characterization and modeling techniques for radio frequency (RF) and microwavesubsystem components. It illustrates their use in a mixed-signal, mixed-mode system-level simulation. The simulation uses an RF transmitterwith digital predistortion (DPD) as an example system. Details of this complex system and performance data are presented.

標簽： 射頻仿真微波系統建模

上傳時間： 2013-12-18

上傳用戶：onewq
如何優化ISM無線電頻率(RF)系統

Abstract: With industrial/scientific/medical (ISM) band radio frequency (RF) products, often times users are new to the structure of Maxim's low pin-count transmitters andfully integrated superheterodyne receivers. This tutorial provides simple steps that can be taken to get the best performance out of these transmitters and receivers whileproviding techniques to measure the overall capability of the design.

標簽： ISM RF 無線電頻率

上傳時間： 2013-11-02

上傳用戶：yph853211
路燈電力線通信自動化系統討論

Abstract: This article discusses the benefits of a G3-PLC-based automation system and presents a real-world example of a systemfor reducing energy usage and lowering maintenance costs in tunnels. The basic system design is explained and key performance

標簽： 路燈電力線通信自動化系統

上傳時間： 2013-10-29

上傳用戶：康郎
MAX16948雙遙控天線LDO開關

Abstract: This application note helps system designers choose the correct external components for use with the MAX16948 dualremote antenna LDO/switch, thus ensuring that automobile-regulated phantom antenna supply and output-current-monitoring circuitrymeet performance objectives. An electronic calculator is provided that helps specify the critical external components for theMAX16948, thus reducing design time. The calculator also determines the device's analog output voltage, output current-limitthreshold, and output current-sensing accuracies. The calculator includes new automatic Step By Step feature that assists designerswith component choice. To use the new automatic feature, click on the Step By Step button relative to the desired section.

標簽： 16948 MAX LDO 遙控天線

上傳時間： 2013-11-04

上傳用戶：lhll918
智能天線技術在基站中的應用

為了能夠滿足基站易于選址、優質快速的建站要求和易維護、低成本、高可靠的運行要求，本文對以方艙來實現一體化結構基站做出一番探討。從系統設計的觀點闡述了移動通信高性能基站天線設計的幾個關鍵問題，介紹了智能天線技術在基站中的應用，并且用HFSS軟件仿真了一種新型的對稱陣子天線，該天線駐波比小于2的帶寬可以達到60%，具有良好的寬頻帶特性。 Abstract: In order to meet the station construction requirement of easy site selection and fast base station， and meet the operational requirement of easy maintenance， low cost and high reliability， this paper discussed the unified architecture base station using shelter. Several key problems of high performance mobile communication base station antenna were illustrated from the view of system design， the application of smart antenna in base station was also introduced. And a novel dipole antenna was simulated by using HFSS， the VSWR of the antenna is less than 2， and the bandwidth was reach to 60%. So it has good broadband properties.

標簽： 智能天線基站中的應用

上傳時間： 2013-11-20

上傳用戶：linlin
快速跳頻通信系統同步技術研究

同步技術是跳頻通信系統的關鍵技術之一，尤其是在快速跳頻通信系統中，常規跳頻通信通過同步字頭攜帶相關碼的方法來實現同步，但對于快跳頻來說，由于是一跳或者多跳傳輸一個調制符號，難以攜帶相關碼。對此引入雙跳頻圖案方法，提出了一種適用于快速跳頻通信系統的同步方案。采用短碼攜帶同步信息，克服了快速跳頻難以攜帶相關碼的困難。分析了同步性能，仿真結果表明該方案同步時間短、虛警概率低、捕獲概率高，同步性能可靠。 Abstract: Synchronization is one of the key techniques to frequency-hopping communication system， especially in the fast frequency hopping communication system. In conventional frequency hopping communication systems， synchronization can be achieved by synchronization-head which can be used to carry the synchronization information， but for the fast frequency hopping， Because modulation symbol is transmitted by per hop or multi-hop， it is difficult to carry the correlation code. For the limitation of fast frequency hopping in carrying correlation code， a fast frequency-hopping synchronization scheme with two hopping patterns is proposed. The synchronization information is carried by short code， which overcomes the difficulty of correlation code transmission in fast frequency-hopping. The performance of the scheme is analyzed， and simulation results show that the scheme has the advantages of shorter synchronization time， lower probability of false alarm， higher probability of capture and more reliable of synchronization.

標簽： 快速跳頻同步技術通信系統

上傳時間： 2013-11-23

上傳用戶：mpquest
CF卡技術資料

The information in this specification is subject to change without notice.Use of this specification for product design requires an executed license agreement from the CompactFlashAssociation.The CompactFlash Association shall not be liable for technical or editorial errors or omissions contained herein; norfor incidental or consequential damages resulting from the furnishing, performance, or use of this material.All parts of the CompactFlash Specification are protected by copyright law and all rights are reserved. Thisdocumentation may not, in whole or in part, be copied, photocopied, reproduced, translated, or reduced to anyelectronic medium or machine readable form without prior consent, in writing, from the CompactFlash Association.The CFA logo is a trademark of the CompactFlash Association.Product names mentioned herein are for identification purposes only and may be trademarks and/or registeredtrademarks of their respective companies.© 1998-99, CompactFlash Association. All rights reserved.

標簽： 技術資料

上傳時間： 2013-10-08

上傳用戶：stewart·
RT9018,RT9018AB-05 datasheet pdf

The RT9018A/B is a high performance positive voltage regulator designed for use in applications requining very low Input voltage and very low dropout voltage at up to 3A(peak).

標簽： 9018 datasheet RT

上傳時間： 2013-10-10

上傳用戶：geshaowei
Xilinx UltraScale：新一代架構滿足您的新一代架構需求（EN）

　　中文版詳情瀏覽：http://www.elecfans.com/emb/fpga/20130715324029.html 　　Xilinx UltraScale:The Next-Generation Architecture for Your Next-Generation Architecture 　　The Xilinx® UltraScale™ architecture delivers unprecedented levels of integration and capability with ASIC-class system- level performance for the most demanding applications. 　　The UltraScale architecture is the industr y's f irst application of leading-edge ASIC architectural enhancements in an All Programmable architecture that scales from 20 nm planar through 16 nm FinFET technologies and beyond, in addition to scaling from monolithic through 3D ICs. Through analytical co-optimization with the X ilinx V ivado® Design Suite, the UltraScale architecture provides massive routing capacity while intelligently resolving typical bottlenecks in ways never before possible. This design synergy achieves greater than 90% utilization with no performance degradation. 　　Some of the UltraScale architecture breakthroughs include: 　　• Strategic placement (virtually anywhere on the die) of ASIC-like system clocks, reducing clock skew by up to 50% 　　• Latency-producing pipelining is virtually unnecessary in systems with massively parallel bus architecture, increasing system speed and capability 　　• Potential timing-closure problems and interconnect bottlenecks are eliminated, even in systems requiring 90% or more resource utilization 　　• 3D IC integration makes it possible to build larger devices one process generation ahead of the current industr y standard 　　• Greatly increased system performance, including multi-gigabit serial transceivers, I/O, and memor y bandwidth is available within even smaller system power budgets 　　• Greatly enhanced DSP and packet handling 　　The Xilinx UltraScale architecture opens up whole new dimensions for designers of ultra-high-capacity solutions.

標簽： UltraScale Xilinx 架構

上傳時間： 2013-11-21

上傳用戶：wxqman
MAX20021,MAX20022示例PCB布局指南

Abstract: This application note explains how to layout the MAX20021/MAX20022 automotive quad powermanagementICs (PMICs) to maximize performance and minimize emissions. Example images of a fourlayerlayout are provided.

標簽： MAX 20021 20022 PCB

上傳時間： 2013-10-10

上傳用戶：dljwq