含鐵氧體的均勻波導(dǎo)或諧振器內(nèi)的對(duì)稱引入模式特性
SYMMETRY-INDUCED MODAL CHARACTERISTICS IN UNIFORM WAVEGUIDES OR RESONATORS CONTAINING FERRITE RODS
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摘要: 本文對(duì)把對(duì)稱分析技術(shù)用于含鐵氧體的均勻波導(dǎo)或諧振器進(jìn)行了論述。對(duì)稱分析能了解到模式電磁場(chǎng)的以下特性:模式分類、模式簡(jiǎn)并、模式場(chǎng)的方位角對(duì)稱性和每一模式類中所有模式的最小波導(dǎo)扇面角。文中首先簡(jiǎn)述了對(duì)稱分析的基本要點(diǎn);接著談到了對(duì)電磁場(chǎng)進(jìn)行對(duì)稱運(yùn)算的幾個(gè)問(wèn)題;重點(diǎn)討論了分析含有鐵氧體的結(jié)構(gòu)內(nèi)的模式場(chǎng)的實(shí)際問(wèn)題;根據(jù)給出的分析處理過(guò)程,對(duì)含有鐵氧體的Cn和Cnv對(duì)稱性均勻波導(dǎo)和Dnh對(duì)稱性諧振器內(nèi)的模式場(chǎng)進(jìn)行了具體分析.最后給出了這些結(jié)構(gòu)內(nèi)的對(duì)稱引入模式特性:模式分類、簡(jiǎn)并情況、縱向電磁場(chǎng)分量的方位角對(duì)稱性和每一模式類的最小波導(dǎo)扇面角。
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關(guān)鍵詞:
Abstract: A technique of symmetry analysis for modal characteristics in uniform waveguides or resonators with ferrite rods is presented here. Symmetry analysis provides basic imformation coneerning modal characteristics, such as mode classification, mode degeneracies between mode classes, the azimuthal symmetries of the modal electromagnetic fields in each mode class, and specifying minimum waveguide sectors for each mode class which completely determine the modes of that mode class. After summarizaing of the basic points of symmetry analysis, some problems concerning symmetry operations are discussed, especially on modal electromagnetic fields in uniform waveguides containing ferrites. Then the given process of symmetry analysis is applied to the structures, i.e. uniform waveguides with Cn symmetry or Cnv symmetry and resonators with Dnh symmetry in which exist longitudinally magnetized ferriet rods. Finally, the analytical results are given in four tables. -
P. R. McIsaac, IEEE Trans. on MTT, MTT-23(1975), 462.[4]M. L. Kales, J. Appl. Phys., 24(1953), 604. -
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