Observation of Excitation of Eigenmodes in Surface-Wave Resonators Having the Cylindrical Geometry

IF 0.8 4区地球科学 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Radiophysics and Quantum Electronics Pub Date : 2023-10-10 DOI:10.1007/s11141-023-10271-x

V. Yu. Zaslavsky, M. D. Proyavin, D. I. Sobolev, I. V. Zheleznov, A. M. Malkin, A. S. Sergeyev, V. E. Kotomina, A. A. Orlovsky, N. S. Ginzburg

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Abstract

We present the results of theoretical and experimental studies of the surface-wave K_a-band resonators which are formed by sections of cylindrical waveguides with single-period wall corrugations. The electrodynamic characteristics of such resonance cavities are analyzed within the quasioptical approach and three-dimensional simulation by the finite-difference time-domain method. The results of the theoretical analysis agree quite well with the experimentally measured frequency dependences of the reflection coefficients, which demonstrate the existence of surface modes with different numbers of longitudinal field variations. The measured Q-factors and frequencies of the above-specified modes corresponded well to the calculated values. In order to perform “cold” electrodynamic tests, wideband waveguide converters of the TE mode of the standard rectangular waveguide to the TM mode of an oversized cylindrical waveguide, which have a sufficiently low level of ohmic loss at a conversion efficiency exceeding 95% in the 34–40 GHz frequency range, were manufactured by the the 3D printing method.

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圆柱形表面波谐振器本征模激发的观测

我们介绍了由具有单周期壁波纹的圆柱形波导截面形成的表面波Ka波段谐振器的理论和实验研究结果。采用准光学方法和时域有限差分法进行三维模拟，分析了这种谐振腔的动力学特性。理论分析的结果与实验测量的反射系数的频率依赖性非常一致，这表明存在具有不同数量纵向场变化的表面模式。上述指定模式的测量Q因子和频率与计算值很好地对应。为了进行“冷”电动测试，通过3D打印方法制造了标准矩形波导的TE模式到超大圆柱形波导的TM模式的宽带波导转换器，该转换器在34–40 GHz频率范围内的转换效率超过95%时具有足够低的欧姆损耗。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Radiophysics and Quantum Electronics ENGINEERING, ELECTRICAL & ELECTRONIC-PHYSICS, APPLIED

CiteScore

1.10

自引率

12.50%

发文量

审稿时长

6-12 weeks

期刊介绍： Radiophysics and Quantum Electronics contains the most recent and best Russian research on topics such as: Radio astronomy; Plasma astrophysics; Ionospheric, atmospheric and oceanic physics; Radiowave propagation; Quantum radiophysics; Pphysics of oscillations and waves; Physics of plasmas; Statistical radiophysics; Electrodynamics; Vacuum and plasma electronics; Acoustics; Solid-state electronics. Radiophysics and Quantum Electronics is a translation of the Russian journal Izvestiya VUZ. Radiofizika, published by the Radiophysical Research Institute and N.I. Lobachevsky State University at Nizhnii Novgorod, Russia. The Russian volume-year is published in English beginning in April. All articles are peer-reviewed.