LTCC Distributed-Element Bandpass Filter with Multiple Transmission Zeros Using Non-Resonating Node
Keywords:
Bandpass filter (BPF), low temperature co-fired ceramic (LTCC), non-resonating node (NRN), transmission zeros (TZ)Abstract
A distributed-element low temperature co-fired ceramic (LTCC) bandpass filter (BPF) with multiple transmission zeros using non-resonating node (NRN) is proposed. By fully taking advantage of the LTCC technology in 3-dimentional (3-D) environment, the employed dual-mode stub-loaded stepped-impedance resonator (SIR) and the NRN are reasonably folded, and miniature circuit size can be obtained. Meanwhile, four transmission zeros are produced in both sides of the passband to realize sharp rejection skirts. For demonstration, a four-pole LTCC BPF using the NRN centered at 3.65 GHz is designed, fabricated and measured. Simulated and measured results are presented, showing good agreement.
Downloads
References
M. Salehi and L. Noori, “Miniaturized microstrip bandpass filters using novel stub loaded resonator,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 30, no. 6, pp. 692-697, June 2015.
A. Boutejdar, N. M. Eltabit, A. A. Ibrahim, E. P. Burte, and M. A. Abdalla, “New compact dual bandpass filter using coupled double-ring resonators and DGS-technique,” Applied Computational Electro-magnetics Society (ACES) Journal, vol. 31, no. 2, pp. 132-137, Feb. 2016.
K. Ma, L. Fan, and S. Zhang, “Compact multilayer self-packaged filter with surface-mounted packaging,” Electron. Lett., vol. 51, no. 7, pp. 564- 566, Apr. 2015.
J.-X. Chen, Y. Zhan, and Q. Xue, “Novel LTCC distributed-element wideband bandpass filter based on the dual-mode stepped-impedance resonator,” IEEE Trans. Compon. Packag. Manuf. Technol., vol. 5, no. 3, pp. 372-380, Mar. 2015.
J.-X. Chen, C. Shao, and Q.-Y. Lu, “Compact LTCC balanced bandpass filter using distributedelement resonator,” Electron. Lett., vol. 49, no. 5, pp. 354-356, Feb. 2013.
H. Tang, J.-X. Chen, Y. Ge, Q.-Y. Lu, J. Shi, and Z.-H. Bao, “Novel LTCC switchable bandpass filter using vertically short-ended sir,” Microwave Opt. Technol. Lett., vol. 56, no. 4, pp. 999-1002, Apr. 2014.
J.-X. Chen, Y. Ge, H. Tang, L.-H. Zhou, J. Shi, and Z.-H. Bao, “Compact LTCC dual-band bandpass filter with high selectivity using the vertical sshaped short-ended SIR,” Microwave Opt. Technol. Lett., vol. 55, no. 6, pp. 1345-1348, June 2013.
M. Makimoto and S. Yamashita, Microwave Resonators and Filter for Wireless Communication: Theory, design and application, Berlin, Germany: Springer-Verlag, 2001.
W. Shen, X.-W. Sun, W.-Y. Yin, J.-F. Mao, and Q.-F. Wei, “A novel single-cavity dual mode substrate integrated waveguide filter with nonresonating node,” IEEE Microw. Wirel. Compon. Lett., vol. 19, no. 6, pp. 368-370, June 2009.
G. Macchiarella, “Generalized coupling coefficient for filters with nonresonant nodes,” IEEE Microw. Wirel. Compon. Lett., vol. 18, no. 12, pp. 773-775, Dec. 2008.
L.-S. Wu, X.-L. Zhou, W.-Y. Yin, L. Zhou, and J.-F. Mao, “A substrate-integrated evanescentmode waveguide filter with nonresonating node in low-temperature co-fired ceramic,” IEEE Trans. Microwave Theory & Tech., vol. 58, no. 10, pp. 2654-2662, Oct. 2010.
H. Chu, Y. X. Guo, and X. Q. Shi, “60 GHz LTCC 3D cavity bandpass filter with two finite transmission zeros,” Electron. Lett., vol. 47, no. 5, pp. 324-326, Mar. 2011.
S.-R. Manuel and G.-G. Roberto, “A class of high-selectivity microstrip transversal bandpass filter using non-resonating nodes,” Proceedings of the 40th European Microwave Conference, pp. 292-295, 2010.
