High-Q whispering modes in empty spherical cavity resonators

被引：10

作者：

Tobar, ME ^{[1
]}

Anstie, JD ^{[1
]}

Hartnett, JG ^{[1
]}

机构：

[1] Univ Western Australia, Dept Phys, Nedlands, WA 6009, Australia

来源：

IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL | 2003年 / 50卷 / 11期

关键词：

D O I：

10.1109/TUFFC.2003.1251123

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

This work presents the study of high-order modes in spherical cavity resonators. In general there are resonant mode families, degenerate in frequency, that "whisper" around the spherical surface. We call these whispering spherical (WS) mode sets. Each set includes the well-known whispering gallery (WG) mode, which propagates like a ray around the azimuth. Also, we identify a new mode, which we label the whispering longitudinal (WL) mode. This mode propagates as a wave front along the longitudinal direction. The rest of the degenerate set propagates like a combination of the WG and WL modes. We show that transverse electric WS modes have high geometric factors, greater than 2000, which increase linearly with frequency. This is an order of magnitude greater than that of a TM010 cylindrical resonator. Also, Q-factors as high as 65,000 at 13.3 GHz were measured at room temperature.

引用

页码：1407 / 1413

页数：7

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