#電子元件 #雷達 #安防 #航空控制 #天氣預測 #汽車電子

【電子小常識之二：雷達】

雷達是二次大戰期間開始發展的「無線電偵測及測距」 (Radio Detection and Ranging) 技術，現已普遍應用在安防、航空控制、天氣預測及智能汽車領域。其工作原理是傳送一個特定波形的電磁訊號，然後雷達接收端會偵測到從目標物體反射出的訊號並加以分析，進而提取想要的資訊，例如：距離、航向和角速度等。設計系統須考慮的關鍵因素有：

◆距離：為了盡可能拉長可視範圍，高功率、高效率的放大器為必備。
◆解析度：為了更貼近物體以找出感興趣的目標資訊，擁有足夠大頻寬是關鍵。
◆可靠性：在工業應用尤其重要。減少「放大級數」(amplification stage) 可簡化複雜度並改善可靠性；採用先進半導體製程以降低高效放大器的散熱需求，則是另一個途徑。綜合兩者，系統器件的尺寸和重量亦可隨之縮減。

想進一步了解什麼是「下世代雷達訊號鏈」？什麼是「超外差」(super-heterodyne) 接收架構？這裡有更多介紹。有興趣的朋友可自行下載相關資料，完全免費。
http://compotechasia.com/microsite/ADI/radar.html

【Workshop】THz Workshop：Virginia Diodes, Inc.
This workshop is free of charge, and all people are welcome to join it.

時 間：2013/11/14(Thur) 10:00~15:00

地 點：國立交通大學工程四館EDB07

講 者：
Stephen H. Jones, Chief Operations Officer, Virginia Diodes, Inc.
Cliff M. Rowland, Engineer, Virginia Diodes, Inc.

報 名：http://goo.gl/UfQ54h 或 交大307實驗室網頁查詢

Abstract:

This workshop will focus on the development of Schottky diode based solid-state THz sourcesand transceivers with state-of-the-art sensitivity. Schottky diodes have long been used to extendthe capabilities of MMIC-based microwave technology into the THz. The use of microwavesynthesizers combined with a heterodyne system architecture allows for measurement systemswith 150 dB of dynamic range at 100 GHz and 100 dB at 750 GHz. This high dynamic range is akey enabling technology for a wide variety of R&D applications as well as general THz test andmeasurement. The workshop will consist of three parts, a talk given Stephen Jones, VDI COO, alive hardware demonstration by Cliff Rowland, VDI Engineer, and an open session for hands-onaccess to equipment.