强激光与粒子束2012，Vol.24Issue(2)：445-448,4.DOI:10.3788/HPLPB20122402.0445
D波段双球镜准光系统测量低耗介质
Biconcave quasi-optical resonator system for low loss dielectric measurements at millimeter wave D band
高源慈 1余国芬 2李恩 1郭高凤 1Charles R.Jones3
作者信息
- 1. 电子科技大学电子工程学院,成都611731
- 2. 芬德雷大学,俄亥俄州 芬德雷45840,美国
- 3. 北卡罗来纳中央大学,北卡罗来纳州 德汉姆27707,美国
- 折叠
摘要
Abstract
For the determination of dielectric properties of low-loss materials in millimeter wave band, this paper describes a biconcave quasi-optical resonator with the Q factor over 0. 8 million, which enables the determination of loss tangents down to the 10-5 range. The biconcave resonator system utilizes a phase-locked loop with harmonic mixer to synchronize a backward wave os-cillator source and a microwave spectrum analyzer. The spectrum analyzer acquires high-resolution scan of the resonance curve. The Q factor of the cavity is calculated by performing a non-linear least squares fit to a Lorentzian line shape or by the resonance curve area method. The test results of quartz, CVD diamond and sapphire at ambient temperature are close to the data in the liter-atures, and the permittivity of 4H-SiC at 132. 07 GHz are measured to be 9. 598 and the loss tangent to be 6. 1× 10-5关键词
准光学开放腔/锁相返波管/损耗角正切/高功率真空输出窗Key words
Quasi-optical resonator/phase-locked loop backward wave oscillator/ loss tangent/ high power microwave vacuum output window分类
信息技术与安全科学引用本文复制引用
高源慈,余国芬,李恩,郭高凤,Charles R.Jones..D波段双球镜准光系统测量低耗介质[J].强激光与粒子束,2012,24(2):445-448,4.
