chatwounitthree上課定(編輯修改稿)
2025-06-20 00:47 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 ion in the vertical radiation device. Because of lacking experimental verification, this suppose by Heaviside and Kennelly could not be valued enough in this period. ? 1919年，在研究無線電波在垂直輻射器中的傳播時(shí)，英國(guó)物理學(xué)家、雷達(dá)專家沃森 ?瓦特，從理論上間接證明了大氣層上空存在一個(gè)導(dǎo)電的氣層。由于沒有經(jīng)過實(shí)驗(yàn)驗(yàn)證，亥維賽及肯內(nèi)利有關(guān)帶電粒子層反射電磁波的假設(shè)，在這一段時(shí)間沒有得到人們足夠的重視。 ? British famous physicist Appleton found in 1926 the Appleton ionosphere (Fionosphere), who won Nobel Prize④ in 1947 because of this contribution. ? 1926年 ， 英國(guó)著名物理學(xué)家阿普爾頓發(fā)現(xiàn)了阿普爾頓電離層 (F電離層 )。 由于這一突出貢獻(xiàn) ， 1947年他榮獲諾貝爾物理學(xué)獎(jiǎng) 。 ? 1930, British physicist Walson Watt named this conductive particle layer on the atmosphere as ionosphere formally. ? 1930年 ， 英國(guó)物理學(xué)家沃森 瓦特正式把存在于高空大氣層中的帶電粒子層命名為“ 電離層 ” 。 ? Radio wave transmitted by shortwave, named shortwave munication, was transmitting through skywave and groundwave. Skywave was transmitted by ionosphere’s reflection. For less depletion, little power and light cost, it can play munication and broadcast in long distance. Shortwave was a major method in the international broadcast, which was also usual wave band in the modern amateur radio telemunication. ? 用短波進(jìn)行的無線電通信，稱為短波通信，它主要靠天波和地波兩種方式傳播。天波傳播正是靠電離層的反射進(jìn)行的，它的傳播衰耗小，因此用較小的功率、較低的成本，就能進(jìn)行遠(yuǎn)距離的通信和廣播。短波廣播至今仍是國(guó)際廣播的主要手段，短波波段也是現(xiàn)代業(yè)余無線電通信常用的波段。 ? The former Soviet Union built up a shortwave broadcast station with 120kilowatt in 1938, which had the biggest power in the world at that time. ? 1938年，前蘇聯(lián)建成了一個(gè)功率為 120千瓦的短波無線電廣播電臺(tái) PB?6，它是當(dāng)時(shí)世界上功率最大的一個(gè)電臺(tái)。 ? In fact, from American chemist Lan Mauer invented vacuum electronic tube in 1912, which was put into practice. And set up in 1921, Radio Corporation of America⑤ put related tubes and radio ponents together, which authorized by Marconi, Bell Telephone, and General Electric Corporations. So these products began to be manufactured in massive scale, and electronics became an independent industry. Not only development of radio broadcast and telemunication industry was promoted, but also huge
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