外文翻譯---微波低噪聲放大器分析-其他專業(yè)-wenkub.com
2025-01-15 09:33 本頁(yè)面
【正文】 因此，在計(jì)算機(jī)技術(shù)高度發(fā)展的今天，利用 ADS 等微波電路仿真軟件進(jìn)行低噪聲放大器等有源軟件的研究和開(kāi)發(fā)，可以有效的提高設(shè)計(jì)精度，縮短研發(fā)周期。 隨著計(jì)算機(jī)技術(shù)的高度發(fā)展，應(yīng)用于微博電路設(shè)計(jì)的仿真軟件也層出不窮。而各種通信系統(tǒng)中最關(guān)鍵的電路之一就是放大器。國(guó)外發(fā)達(dá)國(guó)家的微波中繼通信在長(zhǎng)途通信網(wǎng)中所占的比例高達(dá) 50%以上。由于其通信的容量大而投資費(fèi)用?。s占電纜投資的五分之一），建設(shè)速度快，抗災(zāi)能力強(qiáng)等優(yōu)點(diǎn)而取得迅速的發(fā)展。例如，中波主要沿地面?zhèn)鞑?，繞射能力強(qiáng)，適用于廣播和海上通信。 20 世紀(jì) 20 年代初人們發(fā)現(xiàn)了短波通信，直到 20 世紀(jì) 60 年代衛(wèi)星通信的興起，它一直是國(guó)際遠(yuǎn)距離通信的主要手段，并且對(duì)目前的應(yīng)急和軍事通信仍然很重要。s satellite munication, mobile munications, digital HDTV transmission, general highspeed cable/wireless access, and high quality of the magic recording and many other fields of signal design and signal processing applications, which plays an important role. In developed countries in the microwave relay munication long distance munication work the proportion of as much as 50% or more. According to statistics, the United States is 66%, Japan is 50%, and the French for 54%. Since 1956, our country from east Germany introduced the first set of microwave munication equipment since, after the duplication and spontaneous development process, have made great achievements. In recent years, microwave munication systems have been huge development, thus result in microwave rf circuit performance had very great progress. And all kinds of munication system is the most critical circuit is one of the amplifier. Due to the development of semiconductor technology in the development of the amplifier is very quickly. In recent years many use microwave appeared hybrid integrated technology and single piece of microwave integrated technology of the production process of the sup
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