在迴旋管諧振迴路中利用緩變橢圓截面過渡段來抑制雜模的探討
INVESTIGATION ON THE POSSIBILITY TO MAKE USE OF SLOWLY VARYIMG ELLIPTICAL TRANSITION REGION IN CAVITY OF GYROTRON TO SUPPRESS HIGH ORDER UNWANTED MODES
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摘要: 在迴旋管中圓截面諧振腔與圓環(huán)電子束相互作用是最合理的。但在這種腔中有與主模諧振頻率極接近的雜模存在,本文探討在相互作用區(qū)仍用圓截面諧振腔,而在互作用區(qū)外加進一段特殊設計的緩變橢圓過渡段用來抑制雜模的可能性。我們這樣設計,其雜模場強能夠延伸進過渡段而主模場強則不行;再在過渡段中加載,使其起到抑制雜模而保存主模(cTE0n和sTE1n)的作用。
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關(guān)鍵詞:
- 迴旋管; 雜模抑制; 緩變橢圓截面過渡段
Abstract: It is proposed to introduce a specially designed cavity: in the interaction region, the circular cross-section is kept, beyond which a slowly varying elliptical auxiliary transition section is used to suppress the unwanted modes. The cavity is so designed: the fields of unwanted modes can penetrate to the auxiliary section, but that of the operating mode can not. If we then load the auxiliary section, the unwanted modes can be attanuated but the operating mode (cTE0n and sTE1n) maintained. -
A.V. Gapnov, et al., Int. J. Electron, 51(1981), 277-302.[2]J. G. Kretzschmar, IEEE Trans. on MTT, MTT-18(1970), 547.[3]L. J. Chu, J. Appl. Phys, 9(1983), 583.[4]蔣曼英,祝西里,陸孝厚,丁耀根,電子科學學刊,7(1985), 450.[5]N. W, Mclachlan, Theory and Application of Mathieu Functions, Oxford Press, London, 1951. -
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