Influence of inner-conductor radius on operation frequency of coaxial relativistic backward wave oscillator

被引：1

作者：

Ge X. ^{[1
]}

Zhong H. ^{[1
]}

Qian B. ^{[1
]}

Zhang J. ^{[1
]}

Yang Y. ^{[1
]}

Wang W. ^{[1
]}

机构：

[1] College of Optoelectronic Science and Engineering, National University of Defense Technology

来源：

Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | 2010年 / 22卷 / 05期

关键词：

Coaxial slow-wave structure; Frequency selection; High power microwave; Inner-conductor; Relativistic backward wave oscillator;

D O I：

10.3788/HPLPB20102205.1077

中图分类号：

学科分类号：

摘要：

The dispersion curves of the coaxial slow-wave structure(SWS) with the trapezoidal corrugation are obtained by numerical calculation. The electric field vector of π mode of the quasi-TEM mode and the influence of the inner-conductor radius on resonance frequency are calculated using the electromagnetic software Superfish. In addition, a compact L-band relativistic backward wave oscillator(RBWO) is investigated and optimized in detail with particle-in-cell(PIC) methods(Karat code) to explain effects of the inner-conductor radius. In experiment, the operation frequencies are 1.64 GHz, 1.63 GHz and 1.61 GHz when the inner-conductor radii are 0.50 cm, 0.75 cm and 1.00 cm respectiuely, which shows that the operation frequency decreases with the enlargement of the inner-conductor radius. To sum up, the experimental results are in good agreement with the results of the theoretical analysis.

引用

页码：1077 / 1080

页数：3