The unguided transmission of information using electromagnetic waves
at radio frequency (RF) is often referred to as wireless communications,
the first demonstration of which took place at the end of the 19th cen-
tury and is attributed to Hertz. The technology was, shortly thereafter,
commercialised by, amongst others, Marconi in one of the first wire-
less communication systems, i.e., wireless telegraphy. In the first half of
the 20th century the technology was developed further to enable more
than the mere transmission of Morse code. This first resulted in uni-
directional radio broadcasting and several years later also in television
broadcasting.
資源簡介:The unguided transmission of information using electromagnetic waves at radio frequency (RF) is often referred to as wireless communications, the first demonstration of which took place at the end of the 19th cen- tury and is attributed to ...
上傳時間: 2020-06-01
上傳用戶:shancjb
資源簡介:Bluetooth RF測試-正確的無線電設計測試
上傳時間: 2013-04-15
上傳用戶:eeworm
資源簡介:專輯類-超聲-紅外-激光-無線-通訊相關專輯-183冊-1.48G Bluetooth-RF測試-正確的無線電設計測試-9頁-0.6M.pdf
上傳時間: 2013-04-24
上傳用戶:cxy9698
資源簡介:本文以f1禁系統的可靠性和低成本為立足點,提出了一種基于AT89C2051單片機的RF卡門禁系統設 系計方法。首先簡單介紹了組成這個系統的非接觸式IC卡,然后詳細描述了其軟硬件設計的過程。在實際的應用
上傳時間: 2013-06-13
上傳用戶:lansedeyuntkn
資源簡介:印刷線路板制作技術大全-RF產品設計過程中降低信號耦合的PCB布線技巧
上傳時間: 2013-07-08
上傳用戶:小碼農lz
資源簡介:Abstract: A digital RF modulator, an integrated solution that satisfies stringent DOCSIS RF-peRFormancerequirements, takes advantage of modern technologies like high-peRFormance wideband digital-to-analogconversion and CMOS technology scali...
上傳時間: 2013-10-20
上傳用戶:drink!
資源簡介: RF前置放大電路即讀取光碟片射頻信號的放大電路.其放大電路性能的好壞會直接影響到DVD-ROM產品性能的好壞.其主要功能如下: (1)對鐳射二極體供電進行控制.并產生參考 電壓. (2)對從光感檢測器輸出的微弱電流信號轉成 電壓信號進行...
上傳時間: 2013-11-22
上傳用戶:linlin
資源簡介:? Designers of signal receiver systems often need to peRFormcascaded chain analysis of system peRFormancefrom the antenna all the way to the ADC. Noise is a criticalparameter in the chain analysis because it limits theoverall sensitivity...
上傳時間: 2014-12-05
上傳用戶:cylnpy
資源簡介:Abstract: Impedance mismatches in a radio-frequency (RF) electrical transmission line cause power loss andreflected energy. Voltage standing wave ratio (VSWR) is a way to measure transmission line ImpeRFections. Thistutorial defines VSWR an...
上傳時間: 2013-10-19
上傳用戶:yuanwenjiao
資源簡介:本文以f1禁系統的可靠性和低成本為立足點,提出了一種基于AT89C2051單片機的RF卡門禁系統設 系計方法。首先簡單介紹了組成這個系統的非接觸式IC卡,然后詳細描述了其軟硬件設計的過程。在實際的應用 統設過程中已經驗證了該設計方法的合理性。
上傳時間: 2013-10-15
上傳用戶:takako_yang
資源簡介:作者RICHARD CHI-HSI LI,結合自己20年RF設計經驗,整理的RF設計技術與經驗,工程性很強,從最基本的LNA、MIXERS、差分對等講起,涉及到阻抗匹配,接地,天線設計,RF系統分析,是一本很不錯的書。英文版
上傳時間: 2013-10-30
上傳用戶:ve3344
資源簡介:手機RF知識講座
上傳時間: 2013-10-25
上傳用戶:黑漆漆
資源簡介:The CC1101 is a low-cost sub- 1 GHztransceiver designed for very low-powerwireless applications. The circuit is mainlyintended for the ISM (Industrial, Scientific andMedical) and SRD (Short Range Device)frequency bands at 315, 433, 868, and...
上傳時間: 2013-11-12
上傳用戶:363186
資源簡介:過去,RF功率的性能完全取決于線性效率。如今,開發者遇到更加復雜的挑戰:需要滿足多種標準、信號變化和嚴格的帶寬要求等。針對這一問題,飛思卡爾半導體(NYSE:FSL)日前推出新型硅片RF LDMOS功率晶體管AiRFast RF功率解決方案,將性能和能效提升至新的高度...
上傳時間: 2013-11-25
上傳用戶:drink!
資源簡介:The main objective of this book is to present all the relevant informationrequired for RF and micro-wave power amplifier design includingwell-known and novel theoretical approaches and practical design techniquesas well as to suggest optimu...
上傳時間: 2013-12-22
上傳用戶:vodssv
資源簡介:When I started writing the first edition of RF Power Amplifiers for Wireless Communications,some time back in 1997, it seemed that I was roaming a largely uninhabitedlandscape. For reasons still not clear to me there were few, if any, other...
上傳時間: 2013-11-12
上傳用戶:YYRR
資源簡介:RF circuit design theory and application(射頻電路設計)
上傳時間: 2014-12-30
上傳用戶:aeiouetla
資源簡介:Linear Technology offers some of the highest peRFormance RF and signal chain solutions for wireless and cellularinfrastructure. These products support worldwide standards including, LTE, WiMAX, GSM,W-CDMA, TD-SCDMA,CDMA, and CDMA2000. Other...
上傳時間: 2013-11-04
上傳用戶:kiklkook
資源簡介:本技術文章將介紹如何運用 NI LabVIEW FPGA 來設計並客製化個人的 RF 儀器,同時探索軟體設計儀器可為測試系統所提供的優勢。
上傳時間: 2013-11-24
上傳用戶:toyoad
資源簡介: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 si...
上傳時間: 2013-11-02
上傳用戶:yph853211
資源簡介: 概覽 通過與傳統的儀器進行比較,了解軟件定義的PXI RF儀器在速度上的優勢。如WCDMA測量結果所示,基于多核處理器并行執行的labview測量算法與傳統儀器相比可以實現明顯的速度提升。 介紹 你在早晨7:00伴著搖滾音樂的聲音醒來,收音機...
上傳時間: 2013-10-09
上傳用戶:wangrong
資源簡介:在 PADS2007 中,增加一部分專門針對射頻(RF)設計的功能模塊,包括前面介紹的通過AutoCAD 的DXF 文件導入,來建立一個特殊形狀的器件管腳。下面我們來介紹一下在高速或者高頻電路板設計中,如何在PCB 板邊,或者高速、高頻信號線周圍,或者PCB 板上的空余區域...
上傳時間: 2013-11-19
上傳用戶:haohao
資源簡介:werwe r werwef wer fe wf ewRF ew RF ew fewRFwefewRFyhjyujuyj yu j k77 5j cx zxc
上傳時間: 2013-12-26
上傳用戶:黃華強
資源簡介:讀取RF射頻卡源代碼(C51)
上傳時間: 2013-12-30
上傳用戶:wmwai1314
資源簡介:The CC1000 RF transceiver is very easy to inteRFace with a microcontroller. The chip is configured using a three-wire bus, comprising of PCLK, PDATA and PALE signals.
上傳時間: 2014-01-04
上傳用戶:c12228
資源簡介:我自己寫的一個已知RF的L.C計算諧振頻率的計算,用VB編寫。
上傳時間: 2015-04-12
上傳用戶:jqy_china
資源簡介:CC1000為RF芯片,作為無線通信處理芯片,本程序是基于PIC72作為處理器。頻段為433.92M,具有多種通信方式,通信速度可達到65K。
上傳時間: 2015-04-19
上傳用戶:leixinzhuo
資源簡介:nRF24E1作為 RF處理芯片,內帶51處理器,其頻段處于ISM頻段,通信速度可以達到1M,可以進行跳頻處理,在短距離高速度通信上有非常良好的功能。
上傳時間: 2013-12-18
上傳用戶:yt1993410
資源簡介:由PHILIPS LPC系列單片機完成的可以讀RF卡的匯編程序,可以在C中直接調用.(用片內默認時鐘:7.373MHz)
上傳時間: 2015-04-28
上傳用戶:CSUSheep
資源簡介:這是利用Mifare SDK開發的讀寫基于ISO14443標準RF卡的程序。
上傳時間: 2015-05-03
上傳用戶:ynsnjs