Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
Hongting Jia Last modified date:2018.06.07

Associate Professor / Center for Japan-Egypt Cooperation in Science and Technology(E-JUST Center)


Papers
1. Ahmed Gadallah, Adel Abdel-Rahman, Ahmed Allam, Jia Hongting and Ramesh Pokharel, A high-efficiency, low-power 2.4 GHz class AB PA for WBAN applications using load pull, Japan-Africa conference on Electronics, Communications, and computers, 2017.12.
2. Lingsheng Yang, Biyu Cheng, and Hongting Jia, Frequency Reconfigurable Antenna for Deca-Band 5G/LTE/WWAN Mobile Terminal Applications, Frequenz Journal of RF-Engineering and Telecommunications, https://doi.org/10.1515/freq-2016-0368, 2017.06.
3. Sherif Hekal, Adel B. Abdel-Rahman, Hongting Jia, Ahmed Allam, Adel Barakat, Ramesh Kumar Pokharel, A novel technique for compact size wireless power transfer application using defected ground structures, Transactions on Microwave Theory and Techniques, 10.1109/TMTT.2016.2618919, 65, 2, 591-599, 2017.02, This paper presents a novel technique for high efficiency and compact size wireless power transfer (WPT) systems. These systems are based on coupled defected ground structures (DGS) resonators. Two types of DGSs (H-shape and semi-H-shape) are proposed. The semi-H-shaped DGS realizes larger inductance value, and this results in higher WPT efficiency. Instead of using an inductive-fed resonant coupling, we propose capacitive-fed resonant coupling, which reduces the design complexity and enhances the efficiency further. The DGS resonator of both the systems is loaded by chip capacitors for miniaturization. An equivalent circuit using approximate quasi-static modeling is extracted. An analytical design procedure is developed to calculate the optimum design parameters for the proposed WPT systems. The optimized structures are fabricated and measured. The simulation and measurement results are in good agreement. The proposed semi-H-shaped DGS WPT system has a peak efficiency of 73% at a transmission distance of 25 mm. In turn, the figure of merit becomes the highest among the WPT systems proposed so far..
4. Sherif Hekal, Abdel-Rahaman Adel B, Allam Ahmed, Adel Barakat, Hongting Jia, Ramesh Kumar Pokharel, Asymmetric Strongly Coupled Printed Resonators for Wireless Charging Applications, 2016 IEEE 17TH ANNUAL WIRELESS AND MICROWAVE TECHNOLOGY CONFERENCE (WAMICON), 2016.04, This paper presents a simple compact design for wireless charging applications using asymmetric strongly coupled printed resonators (SCPR). The proposed resonators are further loaded by surface mounted (SMD) capacitors for miniaturization. The system consists of two substrates. The first transmitting substrate contains a driving loop on the top layer and the high Q-resonator on the bottom layer. Similarly, the second substrate contains the high Q-resonator as the receiver and a loop as the load. An equivalent circuit model is extracted. An analytic design method is proposed to get a high wireless power transfer (WPT) efficiency. Good agreement between electromagnetic simulations, circuit simulations, and measurements was achieved. The proposed system achieves a measured WPT efficiency of 60% at 100 MHz using a receiving resonator of size 20 mm × 20 mm away for a transmission distance of 35 mm from the transmitting resonator of size 30 mm × 30 mm..
5. Sherif Hekal, Abdel-Rahaman Adel B, Hongting Jia, Adel Barakat, Ahmed Allam, Kaho Takano, Ramesh Kumar Pokharel, Compact Wireless Power Transfer System Using Defected Ground Bandstop Filters, IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, 10.1109/LMWC.2016.2601300, 26, 10, 849-851, 2016.10, This letter presents a new design for wireless power transfer (WPT) applications using two coupled bandstop filters (BSF). The stopband is created by etching a defected structure on the ground plane, and the power is transferred through electromagnetic (EM) resonant coupling when the two BSFs are coupled back to back. An equivalent circuit model of the proposed WPT system is extracted. Verification of the proposed design is performed through a good agreement between the EM simulation, circuit simulation, and measurement results. The proposed system achieves a measured WPT efficiency of 68.5% at a transmission distance of 50 mm using a compact size (40×40mm2). This results in a figure of merit of the proposed system to be 0.856 and the ratio of transmission distance/lateral size is 1.25 that is the highest among the WPT systems proposed so far using planar structures..
6. Hamed Mosalam, A. Allam, Hongting Jia, 金谷 晴一, Adel B. Abdel-Rahman, Ramesh Kumar Pokharel, Low Power, Low Group delay CMOS Power Amplifier for 3.0 to 7.0 GHz UWB Applications, Progress In Electromagnetics Research, 2016.04.
7. K. Yousef, Hongting Jia, A. Allam, Ramesh Kumar Pokharel, M. Ragab, Keiji Yoshida, A 2-16 GHz Current Reuse Cascaded Ultra-wideband Low Noise Amplifier, Saudi International Electronics, Communications and Photonics Conference, 377-381, 2011.04.
8. K. Yousef, Hongting Jia, A. Allam, Ramesh Kumar Pokharel, M. Ragab, Keiji Yoshida, Design of 3D Integrated Inductor for RFICs, 2013 International Conference on Analog VLSI Circuits, 22-25, 2012.03.
9. Hamed Mosalam, A. Allam, Hongting Jia, Ramesh Kumar Pokharel, M. Ragab, Keiji Yoshida, A 4-9 GHz Excellent Gain flatteness CMOS Ultra-wideband Power Ampilifier, International Conference on Electronics, Communications and Control, 2012.10.
10. L. Abdalla, Hongting Jia, Ramesh Kumar Pokharel, A. Allam, M. Ragab, Haruichi Kanaya, Keiji Yoshida, A 0.18µm CMOS fully differential VGA with 47 dB dynamic range, 2013 International Conference on Analog VLSI Circuits, 13-16, 2013.10.
11. Hamed Mosalam, A. Allam, Hongting Jia, Ramesh Kumar Pokharel, M. Ragab, Keiji Yoshida, A 5-9 GHz CMOS Ultra-wideband Power Amplifier Design Using Load-Pull, 2013 IEEE International Conference on Ultra Wide-band, 13-16, 2013.12.
12. K. Yousef, Hongting Jia, Ramesh Kumar Pokharel, A. Allam, M. Ragab, Haruichi Kanaya, Keiji Yoshida, CMOS Ultra-Wideband Low Noise Amplifier (UWB-LNA) Using Symmetric 3D RF Integrated Inductor, 2013 IEEE International Conference on Ultra Wide-band, 273-275, 2013.12.
13. K. Yousef, Hongting Jia, Ramesh Kumar Pokharel, A. Allam, M. Ragab, Haruichi Kanaya, Keiji Yoshida, Low Power, Low Voltage CMOS Ultra-Wideband Low Noise Amplifier for Portable Devices, Second Japan-Egypt Conference on Electronics, Communications and Computers , 68-70, 2013.12.
14. K. Yousef, Hongting Jia, A. Allam, A. Awinash, Ramesh Kumar Pokharel, T. Kaho, Multi-Phase Ring Oscillator with Minimized Phase Noise for Ultra-Wideband Applications, IEEE International Conference on Ultra-Wideband , 1151-1153, 2014.04.
15. Adel Barakat, A. Allam, Hala Elsadek, Haruichi Kanaya, Hongting Jia, Kuniaki Yoshitomi, Ramesh Kumar Pokharel, Back radiation reduction of 60 GHz CMOS slot Antenna-on-Chip (AoC) using Artificial Dielectric Layer (ADL) for Area Reuse, 2014 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, 2014.07.
16. K. Yousef, Hongting Jia, Ramesh Kumar Pokharel, A. Allam, M. Ragab, Haruichi Kanaya, A 0.18 µm CMOS Current Reuse Ultra-Wideband Low Noise Amplifier (UWB-LNA) with Minimized Group Delay Variations, 2014 Eurpean Microwave Conference , 2014.10.
17. K. Yousef, Hongting Jia, A. Allam, A. Awinash, Ramesh Kumar Pokharel, T. Kaho, An Eight Phase CMOS Injection Locked Ring Oscillator with Low Phase Noise,, IEEE International Conference on Ultra-Wideband , 2014.09.
18. I. L. Abdalla, A. Allam, Ramesh Kumar Pokharel, Hongting Jia, A DC-2.5 GHz variable voltage attenuator in 0.18 um CMOS technology, IEEE Asia Pacific Conference of Circuits and System, 352-355, 2014.11.
19. H. Mosalam, A. Allam, Hongting Jia, A. B. Abdel-Rahman, Ramesh Kumar Pokharel, 4.0 to 9.0 GHz 0.18 um CMOS power amplifier for UWB applications, Third International Japan-Egypt Conference on Electronics, Communications and Computers, 70-71, 2015.05.
20. Ran Song, Haruichi Kanaya, Hongting Jia, A double-sided printed compact UWB antenna, Third International Japan-Egypt Conference on Electronics, Communications and Computers, 18-19, 2015.05.
21. Sherif Hekal, A. B. Abdel-Rahman, A. Allam, Ramesh Kumar Pokharel, Haruichi Kanaya, Hongting Jia, Strong resonant coupling for short-range wireless power transfer using defected ground structures, Third International Japan-Egypt Conference on Electronics, Communications and Computers, 100-101, 2015.05.
22. Ahmed Gadallah, A. Allam, Hongting Jia, A. B. Abdel-Rahman, Ramesh Kumar Pokharel, A low power, high efficiency CMOS power amplifier for IEEE 802.15.6 applications, Third International Japan-Egypt Conference on Electronics, Communications and Computers, 20-21, 2015.05.
23. H. Mosalam, A. Allam, Hongting Jia, Haruichi Kanaya, A. B. Abdel-Rahman, Ramesh Kumar Pokharel, 5.0 to 10.6 GHz 0.18 um CMOS power amplifier with excellent group delay for UWB applications, IEEE MTT International Microwave Symposium, 2015.05.
24. K. Yousef, Hongting Jia, Ramesh Kumar Pokharel, A. Allam, M. Ragab, Haruichi Kanaya, Keiji Yoshida, CMOS Ultra-Wideband Low Noise Amplifier Design, International Journal of Microwave Science and Technology, vol.2013, Artical ID 328406, pages 6, 2013.04.
25. Hongting Jia, An exact analysis of coplanar waveguides and strip lines with full-wave method, IEEE Applied Electromagnetics Conference and URSI Commission B meeting, no.MWT-01,pp.1-4(CDROM), 2009.12.
26. Hongting Jia, A new analysis of scattering problems for electromagnetic crystals consisting of inhomogeneous dielectric materials and conductors, Asia-Pacific Microwave Conderence, no.1618(WE2d-4),PP.1-4(CDROM), 2009.12.
27. Dan Zhang, Hongting Jia and Kiyotoshi Yasumoto, Numerical analysis of microcavities on two-dimensional photonic crystals, International Journal of Infrared and Millimeter Waves, vol.28, no.11,(Nov. 2007), pp.1003-1010, 2007.11.
28. 張 丹、賈 洪廷, Numerical analysis of leaky modes in two-dimensional photonic crystal waveguides using Fourier series expansion method with perfectly matched layer, IEICE Transaction on Electronics, E90-C巻, 第3号, 613-622頁, 2007.03.
29. Hongting Jia and Kiyotoshi Yasumoto, Rigorous analysis of photonic crystals with periodic defects, Microwave and Optical Technology Letters, 10.1002/mop.21140, 47, 3, 256-261, vol.47, No.3, pp.256-261, Nov. 2005, 2005.11.
30. Hongting Jia and Kiyotoshi Yasumoto, Rigorous analysis of guided modes of two-dimensional metallic electromagnetic crystal waveguides, Journal of Electromagnetic Waves and Applications, 10.1163/156939305775570620, 19, 14, 1919-1933, vol.19, No.14, pp.1919-1933, 2005, 2005.10.
31. Kiyotoshi Yasumoto, Hongting Jia, and Kai Sun, Rigorous analysis of two-dimensional photonic crystal waveguides, Radio Science, 10.1029/2004RS003192, 40, 6, vol.40, RS6S02(pp.1-7), Sep. 2005, 2005.09.
32. Hongting Jia and Kiyotoshi Yasumoto, Rigorous mode analysis of coupled cavity waveguides in two-dimensional photonic crystals, International Journal of Infrared and Millimeter Waves, 10.1007/s10762-005-7604-7, 26, 9, 1291-1306, vol.26, No.9, pp.1291-1306, Sep. 2005, 2005.09.
33. Kiyotoshi Yasumoto, Hongting Jia, and Hiroshi Toyama, Analysis of two-dimensional electromagnetic crystals consisting of multilayered periodic arrays of circular cylinders, Electronics and Communications in Japan, Part II: Electronics, 10.1002/ecjb.20182, 88, 9, 19-28, vol.88, No.9, pp.19-28, Sep. 2005, 2005.09.
34. Hongting Jia and Kiyotoshi Yasumoto, Scatteration and absorption characteristics of multilayered gratings embedded in a dielectric slab, International Journal of Infrared and Millimeter Waves, 10.1007/s10762-005-7271-8, 26, 8, 1111-1126, vol.26, No.8, pp.1111-1126, Aug. 2005, 2005.08.
35. Hongting Jia, Dan Zhang, and Kiyotoshi Yasumoto, Fast analysis of optical waveguides using an improved Fourier series method with perfectly matched layer, Microwave and Optical Technology Letters,, 10.1002/mop.20961, 46, 3, 263-268, vol.46, No.3, pp.263-268, Aug. 2005, 2005.08.
36. Hongting Jia, Kiyotoshi Yasumoto, and Hiroshi Toyama, Reflection and transmission properties of layered periodic arrays of circular cylinders embedded in magnetized ferrite slab, IEEE Transactions on Antennas and Propagation, 53, 3, 1145-1153, Vol.3, No.3, pp.1145-1153, 2005.03.
37. Analysis of two-dimensional electromagnetic crystals consisting of multilayered periodic arrays of circular cylinders.
38. Kiyotoshi Yasumoto, Hongting Jia, and Hiroshi Toyama, Electromagnetic scattering by multilayered periodic arrays of circular cylinders, 電気学論文誌A, Vol.124, No.12, pp.1141-1147, 2004, 2004.12.
39. Hongting Jia and Kiyotoshi Yasumoto, A novel formulation of the Fourier model method in S-matrix form for arbitrary shaped gratings, International Journal of Infrared and Millimeter Waves, 10.1023/B:IJIM.0000047450.11515.4a, 25, 11, 1591-1609, Vol.25, No.11, pp.1591-1609, 2004., 2004.11.
40. Hongting Jia and Kiyotoshi Yasumoto, S-matrix solution of electromagnetic scattering
from periodic arrays of metallic cylinders with arbitrary cross section, IEEE Antennas and Wireless Propagation Letters, 10.1109/LAWP.2004.827894, 3, 41-44, Vol.3, pp.41-44, issue 3 2004, 2004.01.
41. Hongting Jia, Kiyotoshi Yasumoto, and Kuniaki Yoshitomi, Analysis of rectangular groove
waveguides using Fourier transform technique, Microwave and Optical Technology Letters, 10.1002/mop.20148, 41, 5, 388-392, Vol.41, No.5, pp.388-392, June 5 2004, 2004.05.