一支新型降壓收集極柵控脈沖行波管
A NEW DEPRESSED COLLECTOR GRID CONTROL PULSED TWT
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摘要: 正 本文介紹一支新研制的X波段、降壓收集極、柵控脈沖功率行波管。該管采用大電流密度鈧酸鹽陰極和小型化釤鈷PPM聚集。利用切斷慢波線(xiàn)縮短了管長(zhǎng)、提高了增益。采用新型散熱措施,在3％的工作比下,輸出功率達(dá)到千瓦級(jí)。用單柵,柵絲直徑為0.025 mm,其電流截獲率約為10％。采用單級(jí)降壓收集極,降壓度40％。電子注動(dòng)態(tài)流通率約為95％,圖1為降壓收集極的實(shí)驗(yàn)曲線(xiàn)。試驗(yàn)管用的是活動(dòng)收集極,其軸向位置可
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關(guān)鍵詞:
Abstract: A grid control pulsed TWT with depressed collector and PPM focusing system is reported in this paper. It operates at X-band and delivers peak output power of 1 kW with saturation gain of 47 dB. The duty cycle is 3%. The electron beam transmission is 95% with RF output at saturated condition. The efficiency is not less than 30% (excluding the heater power). -
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