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Journal of Ceramic Science and Technology

The Journal of Ceramic Science and Technology publishes original scientific articles on all topics of ceramic science and technology from all ceramic branches. The focus is on the scientific exploration of  the relationships between processing, microstructure and properties of sintered ceramic materials as well as on new processing routes for innovative ceramic materials. The papers may have either theoretical or experimental background. A high quality of publications will be guaranteed by a thorough double blind peer review process.

The Journal is published by Göller Verlag GmbH on behalf of the Deutsche Keramische Gesellschaft (DKG). Edited by Yu-Ping Zeng, Shanghai Institute of Ceramics, Chinese Academy of Sciences, China.

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Impact Factor: 1,220
Impact Factor without Journal Self Cites: 1,060
5 Year Impact Factor: 0,818

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Articles

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Miniature Low-Pass Filters in Low-Loss 9k7 LTCC

Steve Dai, Lung-Hwa Hsieh

Sandia National Laboratories, P. O. Box 5800, MS 0959, Albuquerque, NM 87185 – 1349, USA

received Juli 10, 2015, received in revised form August 21, 2015, accepted September 30, 2015

Vol. 6, No. 4, Pages 325-328   DOI: 10.4416/JCST2015-00033

Abstract

DuPont 9k7 low-temperature cofired ceramic (LTCC) is a low-loss, or high-quality-factor Q, tape system targeting at radio frequency (RF) applications. This paper reports on the effect of a critical process parameter, the heating rate, on the densification and dielectric properties of the 9k7 LTCC. The role of competing densification and crystallization during the sintering of 9k7 is discussed. The high Q of DuPont 9K7 can be used to improve RF system performance, for example a better receiver noise figure, by designing embedded passive RF components such as inductors, capacitors and filters. Miniaturized multilayer low-pass filters (LPF) with a wide stopband were fabricated to showcase the technology.

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Keywords

Low-temperature cofired ceramics (LTCC), multilayer, miniature low-pass filter.

References

1 Chen, G.H., Liu, X.Y.: Low-Temperature-sintering and characterization of Glass-Ceramic composites, J. Mater. Sci.: Mater. El., 17, 877 – 82, (2006).

2 Nair, K.M., McCombs, M.F., Souders, K.E., Parisi, J.M., Hang, K.H., Nair, D.M., Beers, S.C.: DuPontTM Green TapeTM 9K7 Low Temperature Co-fired Ceramic (LTCC) Low Loss Dielectric System for High Frequency Microwave Applications, Advances in Electroceramic Materials II, Volume 221. Wiley, Dec 7, 2010.

3 Niu, L., Shi, H., Liu, Z., Jiang, Y., Zhang, A.: A LTCC filter using multi-layered stepped impedance resonators, Microw. Opt. Techn. Let., 55, 2003 – 2006, (2013).

4 Meng, F., Ma, K., Yeo, K.S., Boon, C.C., Xu, S., Lim, W.M., Do, M.A.: A compact coupling controllable elliptical filter based on multilayer LTCC, Microw, Opt. Techn. Let., 55, 1789 – 1792, (2012).

5 Lu, H.-C., Chao, T.W., Chang, Y.L., Chan, T.B., Chou, Y.T.: LTCC layer-to-layer misalignment-tolerant coupled inductors and their application to bandpass filter and helical inductors, IEEE Trans. Compon. Pack., 1, [10], 1608 – 1615, (2011).

6 Yeap, S.B., Chen, Z.N., Qing, X.: Gain-enhanced 60-GHz LTCC antenna array with open air cavities, IEEE Trans. Antenn. Propag., 59, [9], 3470 – 3473, 2011.

7 Hsieh, L.-H., Chang, K.: Compact elliptic-function low-pass filters using microstrip stepped-impedance hairpin resonators, IEEE T. Microw. Theory, 51, [1], 193 – 199, (2003).

8 Kim, K., Kim, Y., Na, H., Lee, J., Park, S., Lim, Y.: Stack lowpass filter using LTCC technology, Microwave and millimetre wave technology, ICMMT 2008, 29 – 32, 2008.

9 Zhao, Y., Li, Y., Xing, M.: A miniaturized multi-layer lowpass filter for microwave application, Electronic packing technology & high density packaging (ICEPT-HDP), pp. 856 – 859, 2010.

10 Dai, S.: Densification and crystallization in crystallizable low temperature Co-fired ceramics, J. Mater. Sci., 47, 4579 – 4584, (2012).

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