Miniature coaxial resonator and related bandpass filter with ultra-wide stopband

被引：4
|
作者：
Belyaev, B. A. [1 ]
Serzhantov, A. M.
Tyurnev, V. V.
Leksikov, A. A.
Leksikov, An. A.
机构：
[1] Russian Acad Sci, Siberian Branch, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia
来源：
TECHNICAL PHYSICS LETTERS | 2012年 / 38卷 / 01期
关键词：
Technical Physic Letter; Ceramic Tube; Metal Case; Resonator Filter; Quarter Wave Resonator;
D O I：
10.1134/S106378501201004X
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Resonator of a new type is described, which is formed by two coaxial conductors applied onto the internal and external surfaces of a ceramic tube arranged in a metal case. An equation for the resonant frequencies is derived. In comparison to a standard coaxial quarter-wave resonator, the proposed device has a shorter length and manifold increased ratio of frequencies of the second resonance to the first resonance. The new resonator can be used for the creation of bandpass filters with ultra-wide stopband. The frequency response of a working prototype four-resonator filter is presented, in which the stopband at a -90 dB level extends up to a frequency that is 47 times greater than the central frequency of the passband.
引用
收藏
页码：47 / 50
页数：4
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