Compact dual-band LTCC filter using folded resonators

Fangzhou Guo, L. Xia, R. Xu
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Abstract

This paper presents a dual-band bandpass compact low temperature co-fired ceramic (LTCC) filter using folded resonators. The passband of the proposed filter centred at 2.45 GHz and 5.2 GHz, and three transmission zeroes are generated. It is easy to couple the Π-type resonators of the proposed structure compared with the planar form. The filter is miniaturized by using the LTCC multilayers structure, and the size of the circuit is 5.5× 5.1 × 2.3 mm3.
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采用折叠谐振器的紧凑双带LTCC滤波器
提出了一种采用折叠谐振腔的双带通低温共烧陶瓷(LTCC)滤波器。该滤波器的通带集中在2.45 GHz和5.2 GHz,并产生了三个传输零点。与平面结构相比,该结构的Π-type谐振器易于耦合。滤波器采用LTCC多层结构实现小型化,电路尺寸为5.5× 5.1 × 2.3 mm3。
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