by Xiaojun Bi (Author), Qiang Ma (Author), Zilan Cao (Author) Background of Multi-band Microwave Circuit.- Analysis of Resonator based on the Microstrip Line.- Multi-band Bandpass Filter with High Selectivity.- Reflectionless Multi-band BPF with Reused Resonances.- Slotline based Multi-band Balun Filter.- High Suppressed Balanced Filter.- Switchable Filtering Diplexer based on Reused L-shape Resonator.- Conclusion. Back Jacket The book systematically introduces the design theory and method of multi-band RF filtering circuits for the modern wireless communication systems or radar systems, which are required to operate at multi-bands. These multi-band filtering RF circuits have drawn more and more attention from the engineers and scientists in the field of RF circuits design. The book proposes the detailed theoretical analysis and abundant experimental data of multi-mode resonators, multi-band bandpass filter with high selectivity, reflectionless multi-band bandpass filter, balanced filter with high suppression, slotline based multi-band balun filter, switchable filtering diplexer based on reused L-shape resonator and miniaturized 55-/95-GHz on-chip dual-band bandpass Filter. The book is intended for undergraduate and graduate students who are interested in filtering circuits design, researchers who are investigating RF & microwave systems, as well as design engineers who are working in the RF & microwave circuits field. Readers can get an in-depth understanding about the multi-band RF filtering circuits design theory and method. Author Biography Dr. Xiaojun Bi is a full professor of School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China. He received the B.S. and M.S. degrees from Huazhong University of Science and Technology (HUST), Wuhan, China, in 2005 and 2007, respectively, and Ph.D. degree from the National University of Singapore (NUS), Singapore in 2013. From 2007 to 2008, he worked as a research associate in the Institute of Micro-electronics, Chinese Academy of Sciences (IMECAS), Beijing, China. From 2009 to 2013, he was a research scholar with NUS and Institute of Micro-electronics (IME), Agency for Science, Technology and Research (A*STAR) engaged in silicon-based millimeter-wave ICs for THz imaging and Gb/s wireless communication. From 2013 to 2015, he was a research scientist with IME, A*STAR and worked on high-speed IC design. In Dec.2014, he joined the School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China as an associate professor, where he has been a Full Professor since Nov.