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Record-Breaking Frequency of 44 GHz Based on the higher order mode of Surface Acoustic Waves with LiNbO_(3)/SiO_(2)/SiC Heterostructures

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Engineering 2023年第1期20卷 112-119页

作者： Jian Zhou Dinghong Zhang Yanghui Liu Fengling Zhuo Lirong Qian Honglang Li Yong-Qing Fu Huigao Duan College of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082China Tianjin Key Laboratory of Film Electronic and Communication Devices School of Integrated Circuit Science and EngineeringTianjin University of TechnologyTianjin 30084China CAS Center for Excellence in Nanoscience National Center for Nanoscience and TechnologyBeijing 100190China Faculty of Engineering and Environment Northumbria UniversityNewcastle upon Tyne NE18STUK

Surface acoustic wave (SAW) technology has been extensively explored for wireless communication, sensors, microfluidics, photonics, and quantum information processing. However, due to fabrication issues, the frequencies of SAW devices are typically limited to within a few gigahertz, which severely restricts their applications in 5G communication, precision sensing, photonics, and quantum control. To solve this critical problem, we propose a hybrid strategy that integrates a nanomanufacturing process (i.e., nanolithography) with a LiNbO_(3)/SiO_(2)/SiC heterostructure and successfully achieve a record-breaking frequency of about 44 GHz for SAW devices, in addition to large electromechanical coupling coefficients of up to 15.7%. We perform a theoretical analysis and identify the guided higher order wave modes generated on these slow-on-fast SAW platforms. To demonstrate the superior sensing performance of the proposed ultra-high-frequency SAW platforms, we perform micro-mass sensing and obtain an extremely high sensitivity of approximately 33151.9 MHz·mm2·μg−1, which is about 1011 times higher than that of a conventional quartz crystal microbalance (QCM) and about 4000 times higher than that of a conventional SAW device with a frequency of 978 MHz.

关键词： Ultra-high frequency SAW higher order mode Hyper sensitive detection

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Beam breakup simulation study for a high energy ERL

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Chinese Physics C 2015年第1期39卷 98-102页

作者：陈思 M.Shimada N.Nakamura 黄森林刘克新陈佳洱 School of Physics University of Chinese Academy of Sciences State Key Laboratory of Nuclear Physics and Technology Institute of Heavy Ion PhysicsPeking University KEK Oho 1-1 TsukubaIbaraki 305-0801Japan

The maximum beam current that can be accelerated in an energy recovery linac （ERL） can be severely limited by the transverse multi-pass beam breakup instability （BBU）, especially in future ERL light sources with multi-GeV high energy beam energy and more than 100 mA average current. In this paper, the multi-pass BBU of such a high energy ERL is studied based on the simulation of a 3-GeV ERL light source that is proposed by KEK. This work is expected to provide a reference for future high energy ERL projects.

关键词： energy recovery linac beam breakup higher order mode

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mode THEORY OF MULTILAYER WAVEGUIDE STRUCTURE WITH DISCONTINUITIES

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Journal of Electronics(China) 2003年第3期20卷 237-240页

作者： Zong Weihua Liang Changhong (National Key Lab of Antenna and Microwave Technology, Xidian University, Xi’an 710071) National Key Lab of Antenna and Microwave Technology Xidian University Xi'an 710071

TEn mode (whose electric field is zero in the normal direction of the boundaries between layers) and TMn mode (whose magnetic field is zero in the normal direction of the boundaries between layers) are defined. Then conditions under which pure TEn (TMn) modes may exist in multilayer waveguide structure with discontinuities are presented. E (H) step wavguides, ridged wavguides, microstrip lines and fin lines all satisfy the conditions, and hold for TEn (TMn) mode. The conventional conclusion that ridged waveguides with inhomogeneous dielectric-slab loading, microstrip lines and fin lines only hold for hybrid modes is revised. Compared with hybrid modes, the number of unknown variations and matching equations is reduced by half for pure TEn (TMn) modes, and the computation cost is decreased dramatically.

关键词： Multilayer waveguide structure Discontinuity higher order mode TEn mode TMn mode

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Rectangular dielectric resonator antenna operating at TE151x mode with enhanced gain

Rectangular dielectric resonator antenna operating at TE151x...

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2019年全国天线年会

作者： ZOU Meng CAO Lei PAN Jin Huawei Technologies Co. Ltd. University of Electronic Science & Technology of China

A rectangular dielectric resonator antenna(DRA) operating at TE mode is designed to achieve an enhanced gain in this *** TE mode is excited by a slot located at the centre of the DRA.A prototype antenna is designed,fabricated and *** measured results demonstrate broadside patterns with a maximum gain of 13.6 *** an average gain of more than 13 dBi across the impedance bandwidth is achieved.

关键词： dielectric resonator antenna higher order mode high gain

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