1. Zhou, Y., P. C. M. van Zijl, X. Xu, et al. "Magnetic resonance imaging of glycogen using its magnetic coupling with water," Proceedings of the National Academy of Sciences, Vol. 117, No. 6, 3144-3149, 2020.
doi:10.1073/pnas.1909921117
2. Zhou, B., W. Sheng, and Y. Zheng, "Miniaturized and wideband lumped LTCC branch-line coupler for dozens of megahertz applications," Microw. Opt. Technol. Lett., Vol. 56, No. 9, 2001-2005, 2014.
doi:10.1002/mop.28548
3. Zhu, L., "Miniaturized lumped coupler with low frequency signals suppression," 2019 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference (CSQRWC), 1-3, Taiyuan, China, 2019.
4. Wang, Y., K. Ma, and S. Mou, "A compact branch-line coupler using substrate integrated suspended line technology," IEEE Microwave and Wireless Components Letters, Vol. 26, No. 2, 95-97, 2016.
doi:10.1109/LMWC.2016.2517158
5. Zhou, B., X. Li, C. Li, L. Qian, and Z. Cai, "Broadband 180° hybrid for 5G applications," 2019 IEEE CPMT Symposium Japan (ICSJ), 195-199, Kyoto, Japan, 2019.
6. Ahn, H., I. Nam, and O. Lee, "An integrated lumped-element quadrature coupler with impedance transforming," IEEE Microwave and Wireless Components Letters, Vol. 30, No. 2, 152-155, 2020.
doi:10.1109/LMWC.2019.2963178
7. Frye, R. C., S. Kapur, and R. C. Melville, "A 2-GHz quadrature hybrid implemented in CMOS technology," IEEE Journal of Solid-State Circuits, Vol. 38, No. 3, 550-555, 2003.
doi:10.1109/JSSC.2002.808287
8. Kazan, O., O. Memioglu, F. Kocer, A. Gundel, and C. Toker, "A lumped-element wideband 3-dB quadrature hybrid," IEEE Microwave and Wireless Components Letters, Vol. 29, No. 6, 385-387, 2019.
doi:10.1109/LMWC.2019.2911648
9. Pan, L., Y. Wu, W. Wang, Y. Zheng, and Y. Liu, "A symmetrical broadband tight-coupled directional coupler with high directivity using three-folded-coupled lines," IEEE Transactions on Circuits and Systems II: Express Briefs, Vol. 69, No. 9, 3744-3748, 2022.
doi:10.1109/TCSII.2022.3169160
10. Hou, J.-A. and Y.-H. Wang, "A compact quadrature hybrid based on high-pass and low-pass lumped elements," IEEE Microwave and Wireless Components Letters, Vol. 17, No. 8, 595-597, 2007.
doi:10.1109/LMWC.2007.901775
11. Microwave Office, Cadence Corporation, , El Segundo, CA.
12. Cadence Analyst, Cadence Corporation, , El Segundo, CA.