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首页> 外文期刊>Microwaves, Antennas & Propagation, IET >Compact cross-coupled filters based on isosceles right triangular and equilateral triangular SIW cavities
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Compact cross-coupled filters based on isosceles right triangular and equilateral triangular SIW cavities

机译：基于等腰的紧凑型交叉耦合滤波器右三角形和等边三角形SIW腔

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摘要

Two kinds of classical triangular metric resonant cavities including the isosceles right triangular and equilateral triangular metric cavities are investigated carefully. A comprehensive and rigorous derivation process of these two resonant cavities is proposed. Based on this, the mode function and the transverse field components for the modes in the triangular substrate-integrated waveguide (SIW) cavities can be provided. Then the resonant frequency of both kinds of triangular SIW cavities can be calculated. Combined it with the coupling matrix, a fourth-degree filter implemented of isosceles right triangular SIW cavities and a sixth-degree filter formed by equilateral triangular SIW cavities are designed, fabricated and measured in detail. The measured results are in line with the simulated ones. The frequency responses of both filters show a pair of transmission zeroes at each side of the pass band due to the cross-coupling structure. It also verifies the validity of the derivation in this study. Compared with the rectangular and circular resonant ones, the construct of the triangular cavity has the advantage of much more compact. Besides, the proposed filters based on the triangular cavity also have their own advantages of low cost, good selectivity and easy integration with other planar circuits.
机译：小心地研究了包括等腰右三角形和等边三角形度量空腔的两种经典三角形度谐振腔。提出了这两个共振腔的全面且严谨的衍生过程。基于此，可以提供三角形基板 - 集成波导（SiW）空腔中模式的模式功能和横向场分量。然后可以计算两种三角形SiW腔的谐振频率。将其与耦合矩阵结合在一起，通过等边三角形SIW空腔形成的等四度过滤器，并详细地设计，制造和测量由等边三角形SIW空腔形成的六度过滤器。测量结果符合模拟的结果。由于交叉耦合结构，两个过滤器的频率响应在通带的每一侧都显示了一对传输零。它还验证了这项研究中的衍生的有效性。与矩形和圆形共振器相比，三角形腔的构造具有更紧凑的优点。此外，基于三角形腔的提出过滤器还具有低成本，良好选择性和与其他平面电路轻松集成的优势。

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