沙龙时间：2022年10月18日（周二）
上午9：30
沙龙地点：学科2号楼 N201
腾讯会议：138-616-539
报告信息：
报告人 | 工作单位 | 报告题目 |
张庆乐 | 英飞凌香港 | Microwave to THz Antenna Designs Based on Spoof Surface Plasmon Polariton |
罗皓瑞 | 新加坡国立大学 | Advanced Modeling of Gallium Nitride High Electron Mobility Transistors |
段俊冰 | 澳门大学 | Research on the Pin-Loaded EH0-Mode Microstrip Leaky Wave Antennas |
邓辉 | 澳门大学 | Advanced Decoupling Techniques in Patch Antennas for Wireless Application |
报告摘要：
Title: Microwave to THz Antenna Designs Based on Spoof Surface Plasmon Polariton
Speaker: Qingle Zhang
Abstract—This presentation presents some novel antennas based on spoof surface plasma polaritons (SPPs) at microwave, millimeter-wave and terahertz frequencies. Since the spoof SPPs usually have strong field confinement characteristics with single-layer structure, three planar leaky-wave antennas are proposed to achieve linearly-polarized and circularly-polarized scanning beams with high efficiencies at microwave frequencies. With the quick development of commercial 3D printing technologies, it provides the low-cost and high-resolution fabrication solution for millimeter-wave and terahertz antennas with complex geometries. Due to the unique dispersions and field distributions of 3D SPP, several millimeter-wave and terahertz antennas based on SPP are developed and fabricated, which achieve wideband, high gain and low cross-polarizations.
Title: Advanced Modeling of Gallium Nitride High Electron Mobility Transistors
Speaker: Haorui Luo
Abstract—Microwave transistors, including the gallium nitride high electron mobility transistors (GaN HEMTs), are widely used in monolithic microwave integrated circuit (MMIC) applications, such as power amplifiers. Accurate and reliable models are necessary for circuit design and simulation analysis based on electronic design automation (EDA) technology. This presentation includes some of the recent advances in GaN HEMT modeling. Various modeling approaches, including the empirical model, physical model and artificial neural network (ANN)-based model will be covered as well.
Title: Research on the Pin-Loaded EH0-Mode Microstrip Leaky Wave Antennas
Speaker: Junbing Duan
Abstract—Microstrip leaky wave antennas (LWAs) have acquired extensive attention, due to its low profile, simple structure, easy integration, and frequency-dependent beam scanning characteristics. The pin-loaded EH0-mode microstrip LWAs contain the above merits of traditional higher order mode microstrip ones, and can realize the radiation in the fundamental mode of the transmission line without limitation on the antenna width. However, the split dual-beam pattern in the transversal plane may become its main restriction for various application, such as the employment in two-dimensional antenna array. Hence, this report will introduce some recent exploration works about the pattern conversion methods of the pin-loaded EH0-mode microstrip LWAs, based on our proposed SOL de-embedding methods for antenna dispersion analysis.
Title: Advanced Decoupling Techniques in Patch Antennas for Wireless Application
Speaker: Hui Deng
Abstract – Mutual coupling is an exchange of energy between multiple antennas or multiple ports of a single antenna, which occurs severely when the antenna elements are very closely spaced or different ports share the same radiator. Unfortunately, this undesired correlation severely deteriorates the independence and performance of the antenna, such as reduced gain and efficiency, distortion of the radiation patterns, and mismatch of the ports. On the other hand, since the intrinsic advantages of low profile, lightweight, and easy fabrication, microstrip patch antennas (MPAs) have become an increasingly popular form of antenna element in multiple antenna systems. Therefore, this report will introduce a series of advanced decoupling techniques in patch antennas, including two scenarios: port isolation enhancement between the two-port single patch antenna and decoupling between closely spaced patch antennas.