Novel compact quasi-elliptic SIW filter based on quarter-mode cavities

S. Moscato, C. Tomassoni, M. Bozzi, L. Perregrini
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引用次数: 5

Abstract

This paper presents a novel substrate integrated waveguide (SIW) filter, based on quarter-mode cavities, which permits to obtain a transmission zero close to the passband. The use of quarter-mode cavities provides a significant size reduction compared to regular SIW cavities, while preserving most of the advantages. The proposed filter comprises four side-coupled cavities, and the use of cross-coupling permits to introduce the transmission zero. The cross-coupling is due to thin metal strip outside the cavities, and it can be easily controlled to locate the transmission zero at the desired frequency. A four-pole filter operating at frequency of 4 GHz, with a transmission zero very close to the passband, was fabricated and measured. The proposed filter has a footprint of 41×28.5 mm2, corresponding to 0.55 λ0×0.38 λ0, where λ0 is the wavelength in vacuum at 4 GHz.
基于四分之一模腔的新型紧凑准椭圆SIW滤波器
本文提出了一种基于四分之一模腔的新型基片集成波导(SIW)滤波器,该滤波器允许在接近通带的地方获得传输零。与常规SIW腔相比,四分之一模腔的使用大大减小了尺寸,同时保留了大多数优点。所提出的滤波器包括四个侧耦合腔,并且使用交叉耦合允许引入传输零点。交叉耦合是由于腔外的薄金属带,它可以很容易地控制,以定位在所需的频率传输零点。制作并测量了一个工作频率为4ghz、传输零点非常接近通带的四极滤波器。该滤波器的占地面积为41×28.5 mm2,对应于0.55 λ0×0.38 λ0,其中λ0为真空中4 GHz的波长。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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