Compact dual-mode loop resonators for microwave triplexer applications

Jia-Lin Li; Peng Liu; Jun-Hao Ye

doi:10.2478/jee-2023-0034

Abstract

In this paper, we study meandered topologies of a dual-mode loop resonator for microwave multiplexer applications. Compact channel filter structures that characterize controllable transmission zeros locating simultaneously at the lower stopband or upper stopband are, for the first time, investigated for such a kind of resonators and based on this, a microstrip triplexer is proposed. The studied triplexer uses one of the filter structures to realize the middle channel, and the rest structure to realize the upper and lower channels. The center frequencies of the three channels are 1.8 GHz, 2.0 GHz and 2.2 GHz, and the 3-dB fractional bandwidths are 3.6%, 3.6% and 4.1%, respectively. The developed triplexer features high channel-isolations of over 40 dB as a result of the controllable transmission zeros of the channel filters.

References

G. L. Matthaei and E. G. Cristal, “Multiplexer channel-separating units using interdigital and parallel-coupled filters,” IEEE Transactions on Microwave Theory and Techniques, vol. 13, no. 3, pp. 328-334, May 1965.
Search in Google Scholar Back to article
R. J. Wendel, “Printed-circuit complementary filters for narrow bandwidth multiplexers,” IEEE Transactions on Microwave Theory and Techniques, vol.16, no. 3, pp. 147-157, March 1968.
Search in Google Scholar Back to article
T. Kojima, A. Gonzalez, S. Asayama and Y. Uzawa, “Design and development of a hybrid-coupled waveguide multiplexer for a multiband receiver,” IEEE Transactions on Terahertz Science and Technology, vol. 7, no. 1, pp. 10-19, Jan. 2017.
Search in Google Scholar Back to article
Y. Feng, B. Zhang, Y. Liu, Z. Niu, Y. Fan and X. Chen, “A D-band manifold triplexer with high isolation utilizing novel waveguide dual-mode filters,” IEEE Transactions on Terahertz Science and Technology, vol. 12, iss. 6, pp. 678 – 681, Nov. 2022.
Search in Google Scholar Back to article
Y. Yang, M. Yu and Q. Wu, “Expanding the working bandwidth of the manifold coupled multiplexers,” in IEEE MTT-S International Microwave Symposium (IMS), 2021, pp. 154-157.
Search in Google Scholar Back to article
D. M. Martínez, S. Bila, F. Seyfert, M. Olivi, O. Tantot and L. Carpentier, “Synthesis method for manifold-coupled multiplexers,” in 49th European Microwave Conference (EuMC), 2019, pp. 308-311.
Search in Google Scholar Back to article
J. H. Park, E. S. Choi, D. K. Baek and P. Y. Lee, “A circulator coupled 8-channel Ka-band input multiplexer design of communication satellites,” in International Symposium on Antennas and Propagation (ISAP), 2018, pp. 1-2.
Search in Google Scholar Back to article
C. W. Tang and C. T. Tseng, “Design of a packaged microstrip triplexer with star-junction topology,” in 42nd European Microwave Conference, 2012, pp. 459-462.
Search in Google Scholar Back to article
J. Xu, Z. Y. Chen and H. Wan, “Lowpass–bandpass triplexer integrated switch design using common lumped-element triple-resonance resonator technique,” IEEE Transactions on Industrial Electronics, vol. 67, no. 1, pp. 471-479, Jan. 2020.
Search in Google Scholar Back to article
W. Li, X. Ye and H. Ma, “Design of microstrip triplexer with new miniature resonator,” in 5th Global Symposium on Millimeter-Waves, 2012, pp. 641-643.
Search in Google Scholar Back to article
M. Q. Dinh and M. Thuy Le, “Triplexer-based multiband rectenna for RF energy harvesting from 3G/4G and WiFi,” IEEE Microwave and Wireless Components Letters, vol. 31, no. 9, pp. 1094-1097, Sept. 2021.
Search in Google Scholar Back to article
Z. L. Zhu, and J. L. Li, “Design of dual-mode loop resonator-based microwave diplexers with enhanced performance,” Radioengineering, vol. 31, no. 4, pp. 527-532, Dec. 2022.
Search in Google Scholar Back to article

Compact dual-mode loop resonators for microwave triplexer applications

Abstract

Paradigm

My account