High-Q sapphire-rutile frequency-temperature compensated microwave dielectric resonators

被引：45

作者：

Tobar, ME ^{[1
]}

Krupka, J ^{[1
]}

Hartnett, JG ^{[1
]}

Ivanov, EN ^{[1
]}

Woode, RA ^{[1
]}

机构：

[1] Univ Western Australia, Dept Phys, Nedlands, WA 6907, Australia

来源：

IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL | 1998年 / 45卷 / 03期

基金：

澳大利亚研究理事会;

关键词：

D O I：

10.1109/58.677747

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

A sapphire-rutile composite resonator was constructed from a cylindrical sapphire monocrystal with two thin disks of monocrystal rutile held tightly against the ends. Because rutile exhibits low loss and an opposite temperature coefficient of permittivity to sapphire, it is an ideal material for compensating the frequency-temperature dependence of a sapphire resonator. Most of the electromagnetic modes in the composite structure exhibited turning points (or compensation points) in the frequency-temperature characteristic. The temperatures of compensation for the WG quasi TM modes were measured to be below 90 K with Q-factors of the order of a few million depending on the mode. For WG quasi TE modes, the temperatures of compensation were measured to be between 100 to 160 K with Q-factors of the order of a few hundreds of thousands, depending on the mode. The second derivatives of the compensation points were measured to be of the order 0.1 ppm/K-2, which agreed well with the predicted values.

引用

页码：830 / 836

页数：7

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