微帶型行波管外平衡器的計(jì)算機(jī)輔助設(shè)計(jì)和實(shí)驗(yàn)研究
CAD AND EXPERIMENTAL RESEARCH OF THE MICROSTRIP EQUALIZER FOR TWT AMPLIFIER
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摘要: 利用微帶電路作成的行波管外平衡器的理論研究和實(shí)驗(yàn)工作已經(jīng)完成。為了進(jìn)一步改進(jìn)行波管的性能,本文對(duì)平衡器的設(shè)計(jì)計(jì)算方法進(jìn)行了討論,改進(jìn)設(shè)計(jì)了一個(gè)單級(jí)平衡器,使在2.87.0GHz的頻帶內(nèi)增益起落從11.6dB降為2.74dB。同時(shí)提出不對(duì)稱(chēng)增益特性的雙級(jí)復(fù)式補(bǔ)償平衡器的概念和方法,設(shè)計(jì)和研制了一個(gè)雙級(jí)平衡器。利用計(jì)算機(jī)對(duì)微波電路參量進(jìn)行了優(yōu)選調(diào)整后,在2.57.5GHz的頻帶內(nèi),增益起落從13.6dB降為2.73dB。實(shí)驗(yàn)結(jié)果的變動(dòng)量為5dB。
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關(guān)鍵詞:
- 行波管; 平衡器; 反射電路; 插入損耗; 增益頻率特性
Abstract: Theoretical and experimental research have been done for external TWT equalizer by using microstrip circuit. In order to further improve the performance of TWT, a CAD method is employed to optimize the circuit parameters, and then the gain variation can be reduced from 11.2 dB to 2.74 dB at a bandwidth of 2.8-7.0 GHz. A two-stage equalizer has been also tested. After adjusting six parameters in the microstrip circuit by the use of computer, the gain variation could be reduced from 13.6 dB to 2.73 dB at a bandwith of 2.5--7.5 GHz. But the experimental results is about 5 dB. The deviation between them is analyzed qualitatively. -
張國(guó)興,遲鏡瑩,行波管用微帶型外平衡器,南京工學(xué)院學(xué)報(bào),1986年,第1期, 第71頁(yè).[2]Fulvio Ananasso, Microwaves, 18(1978)11, 108-113.[3]C.T.Edwards.[J].Fundations for Microwave Circuit Design, John Willey Sons.1981,:-[4]A. Presser, IEEE Trons. on MTT,MTT-26(1978)10, 801-805. -
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