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This paper presents a systematic investigation of quarter-mode filters in substrate integrated waveguide (SIW) technology. This class of filters is particularly convenient because it combines the features of SIW structures with the improvement of size reduction. After a thorough analysis of the quarter-mode SIW cavity, this paper presents different coupling mechanisms and feeding techniques for the...
This paper presents a novel substrate integrated waveguide (SIW) filter topology, based on mushroom-shaped resonators. By exploiting non-resonant nodes, this structure allows the coupling between non adjacent nodes, resulting in the presence of transmission zeros with in-line geometry. This filter exhibits a very compact footprint and requires a double-layer configuration. The operation principle...
A novel active antenna array, based on substrate integrated waveguide technology, is designed and demonstrated. The array is based on cavity-backed antenna oscillators, and the coupling is obtained by properly connecting the cavities. Accurate control of both amplitude and phase of the coupling is achieved. The most significant result of this novel array is the possibility to obtain beam-scanning...
This paper presents the design of a reflectarray based on coupled oscillators, whose elements are active cavity-backed antenna oscillators. The cavity backed topology, implemented in Substrate Integrated Waveguide (SIW) technology, allows for a compact, single substrate implementation, and provides a means for the suppression of the undesired surface-wave modes and for heat dissipation. The coupling...
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