公开(公告)号：US20210104601A1

公开(公告)日：2021-04-08

申请号：US17084665

申请日：2020-10-30

Applicant: University of Electronic Science and Technology of China

Inventor： Qian LUO ,  Xuanqing JIANG ,  Houdong WEN ,  Siyuan MENG

IPC: H01L29/06 ,  H01L29/778 ,  H01L29/66

Abstract: A high-voltage n-channel high electron mobility transistor (HEMT) device is provided. In view of a relatively high process difficulty in preparing super junctions on heterojunction devices such as HEMT, the high-voltage n-channel HEMT device provides a surface super junction structure for an n-channel HEMT device. A comb-finger-shaped p-type semiconductor strip block is prepared on a surface of a drift region of the high-voltage n-channel HEMT device, and the p-type semiconductor strip block is electrically connected to a source electrode, so that large-range depletion of a channel of the drift region is realized under a turn-off condition, and a depletion region tolerates a high voltage, thus enhancing a breakdown characteristic of the high-voltage re-channel HEMT device.

公开(公告)号：US20210092648A1

公开(公告)日：2021-03-25

申请号：US16756128

申请日：2018-10-18

Applicant: University of Electronic Science and Technology of China

Inventor： Guolin SUN ,  Kun XIONG

IPC: H04W28/26 ,  H04L5/00 ,  H04W72/04 ,  H04W72/12

Abstract: A method for reserving and allocating resources for an ultra-low-latency uplink service flow based on an air interface slice includes: virtualizing an air interface resource of a base station side into an ultra-low-latency slice resource and a non-ultra-low-latency slice resource; recording a collision situation on reserved resources in each retry window, and dynamically adjusting a size of the reserved ultra-low-latency slice resource; after detecting that a terminal transmits ultra-low-latency data on the ultra-low-latency slice resource, performing a resource reallocation and determining whether an idle resource is presented; if presented, allocating the idle resource to the terminal transmitting the ultra-low-latency data and returning the borrowed non-ultra-low-latency slice resource after transmitting the ultra-low-latency data; and if not presented, borrowing the non-ultra-low-latency slice resource allocated to a non-ultra-low-latency terminal and returning the borrowed non-ultra-low-latency slice resource after transmitting the ultra-low-latency data.

公开(公告)号：US10944483B2

公开(公告)日：2021-03-09

申请号：US16925340

申请日：2020-07-10

Applicant: University of Electronic Science and Technology of China

Inventor： Shuqiang Chen ,  Shiwen Jin ,  Yuanyuan Jiang ,  Miao Yan

IPC: H04B10/00 ,  H04B10/61 ,  H04J14/00

Abstract: A reflection-type coherent optical communication system combined with unidirectional optical signal amplification, comprises a polarization controller, a polarization beam splitter, a polarization maintaining optical circulator, an In-line polarizer, an optical modulator, a photoelectric converter, an electrical comparator, an optical amplifier, a laser, a coupler, a reflection end and a coherent receiver. A light source is disposed at a receiving end, and the laser emits an optical carrier. The optical carrier is transmitted through the coupler and an optical fiber. Thereafter, the polarization state of the optical carrier is controlled by two ways, the optical carrier passes through the polarization controller in a first way, and two beams of light are output by the polarization beam splitter. A beam of light with high-power is modulated through a first branch, and the modulation signal is returned along an original optical path.

公开(公告)号：US20210043098A1

公开(公告)日：2021-02-11

申请号：US16672434

申请日：2019-11-02

Applicant: University of Electronic Science and Technology of China

Inventor： Yulin Wang ,  Yu Luo ,  Siyu Zhan ,  Pengfei Liu

IPC: G08G5/04 ,  G08G5/00 ,  G05D1/10

Abstract: Methods and systems of active discovery and collaborative collision avoidance are described for aircrafts. Specifically, an aircraft predicts firstly the four-dimensional information of its short future flight path based on existing information, then shares the information actively among its adjacent aircrafts, realizes finally collaborative collision avoidance based on the future flight paths of adjacent aircrafts. The described methods contain the following steps: prediction and broadcast of short future flight path, broadcast reception and analysis and collision avoidance, and resumption of planned path and state. According to the methods, a system is also described to implement the above method and it contains seven corresponding modules. Since sharing the future information rather than the past information among aircrafts, the advantage of this intervention is strong real-time, low computation complexity, low cost, and more aircrafts accommodated in the same space.

公开(公告)号：US20210002177A1

公开(公告)日：2021-01-07

申请号：US16712960

申请日：2019-12-12

Applicant: University of Electronic Science and Technology of China

Inventor： Enzhu LI ,  Hongcheng YANG ,  Chengli SUN ,  Chaowei ZHONG ,  Shuren ZHANG

IPC: C04B35/495 ,  C04B35/626 ,  C04B35/64 ,  C04B35/634

Abstract: A ceramic material, including: BaWO4-xM2CO3-yBaO-zB2O3-wSiO2, where x=0-0.2 mole, y=0-0.05 mole, z=0-0.2 mole, w=0-0.1 mole, M represents an alkali metal ion selected from Li+, K+, Na+, and x, y, z, and w are not zero at the same time.

公开(公告)号：US20200270144A1

公开(公告)日：2020-08-27

申请号：US16871037

申请日：2020-05-10

Applicant: University of Electronic Science and Technology of China

Inventor： Deen Gu ,  Yatao Li ,  Yadong Jiang

IPC: C01G31/02 ,  C08L39/06

Abstract: A preparation method of a vanadium oxide powder with high phase-transition latent heat includes steps of taking vanadium pentoxide, oxalic acid and PVP as raw materials, preparing a B-phase VO2 nano-powder modified by the PVP, and then annealing the B-phase VO2 nano-powder modified by the PVP at high temperature in an oxygen atmosphere, and obtaining the vanadium oxide powder with high phase-transition latent heat which includes M-phase VO2 with a mass percentage in a range of 96-99% and V6O13 with a mass percentage in a range of 1-4%, and has the phase-transition latent heat larger than 50 J/g. Compared with the vanadium oxide powder prepared by a traditional method without PVP modification and using a vacuum annealing process, the phase-transition latent heat of the vanadium oxide powder provided by the present invention is increased by at least 60%.

公开(公告)号：US10730226B2

公开(公告)日：2020-08-04

申请号：US15893678

申请日：2018-02-11

Applicant: University of Electronic Science and Technology of China

Inventor： Weizhi Li ,  Jimeng Li ,  Yuming Wu ,  Xiaosong Du ,  Huiling Tai ,  He Yu

IPC: B29C55/04 ,  C08J5/18 ,  B29C41/00 ,  B29C41/02 ,  B29C41/46 ,  B29C55/00 ,  B29L7/00 ,  B29K27/00 ,  B29K105/00

Abstract: A method for preparing a pyroelectric polymer film based on a combined process of solution casting and uniaxial stretching is disclosed. The pyroelectric polymer film is firstly prepared by solution casting, afterwards, the casted film is subjected to uniaxial stretching when the film is in a semi-cured state (wet film). Thus a larger stretching ratio (>10) at a lower temperature (even at room temperature) is realized. Without undergoing a further poling process, the as-stretched film does have a fairly, good pyroelectric performance. Moreover, the surface of the stretched film is smoother and has fewer surface defects.

公开(公告)号：US10705205B2

公开(公告)日：2020-07-07

申请号：US16012791

申请日：2018-06-20

Applicant: University of Electronic Science and Technology of China

Inventor： Qun Wan ,  Yue Yang ,  Zhenzhu Zha ,  Jihao Yin ,  Lin Zou ,  Jie Zhuang ,  Xinyu Chen

IPC: G01S13/90 ,  G01S7/35

Abstract: The present invention relates to the technical field of synthetic aperture radar, and in particular to a ground-based interference synthetic aperture radar-based atmospheric phase compensation method. The present invention first uses the inverse fast Fourier transform algorithm to rapidly and effectively realize the focusing in the range and cross-range dimension. Then a triple threshold method which combines coherence coefficient, amplitude, and amplitude dispersion index is used to select reliable PS points. Finally, under a full consideration of the spatial correlation of the atmospheric phase, the atmospheric phase is estimated by using a two-dimensional-polynomial model. The present invention can rapidly and accurately estimate and compensate the atmospheric phase, is helpful in improving the accuracy of GB-InSAR real-time measurement, and valuable and universal in practical application.

公开(公告)号：US10608106B2

公开(公告)日：2020-03-31

申请号：US15955706

申请日：2018-04-18

Applicant: University of Electronic Science and Technology of China

Inventor： Ming Qiao ,  Zhengkang Wang ,  Ruidi Wang ,  Zhao Qi ,  Bo Zhang

IPC: H01L29/78 ,  H01L29/423 ,  H01L29/40 ,  H01L29/08 ,  H01L29/10 ,  H01L29/06

Abstract: A power semiconductor device including a first conductivity type semiconductor substrate, a drain metal electrode, a first conductivity type semiconductor drift region, and a second conductivity type semiconductor body region. The second conductivity type semiconductor body region includes a first conductivity type semiconductor source region and anti-punch-through structure; the anti-punch-through structure is a second conductivity type semiconductor body contact region or metal structure; the lower surface of the anti-punch-through structure coincides with the upper surface of the first conductivity type semiconductor drift region or the distance between the two is less than 0.5 μm, so that make the device avoid from punch-through. An anti-punch-through structure is introduced at the source end of the device to avoid punch-through breakdown caused by short channel and light-doped body region.

公开(公告)号：US20190226908A1

公开(公告)日：2019-07-25

申请号：US16289657

申请日：2019-03-01

Applicant: University of Electronic Science and Technology of China

Inventor： Yunjiang Rao ,  Yun Fu

IPC: G01H9/00 ,  G02B6/42 ,  H04J14/00

Abstract: A distributed acoustic sensing (DAS) system based on space-division multiplexing with multi-core fiber (MCF) is proposed. It relates to a technical field of distributed optical fiber sensing. The present invention maintains the advantage of single-ended measurement in the standard DAS system, and realizes the intensity accumulation of the Rayleigh backscattering light within each core of the MCF, which can greatly improve the strain resolution of DAS systems. Moreover, the introduction of optical switch can make different code sequences transmit in the different core of the MCF simultaneously, which can make the single-pulse response with coding gain demodulated without sacrificing the frequency responding bandwidth. Furthermore, the utilization of space-division multiplexing can make multiple pulses with precious time delay transmit in the MCF simultaneously, which can greatly improve the frequency responding bandwidth of DAS system.