公开(公告)号：US20230238997A1

公开(公告)日：2023-07-27

申请号：US17873134

申请日：2022-07-25

Applicant: University of Electronic Science and Technology of China

Inventor： Bo Zhang ,  Zhongqian Niu ,  Xiaobo Yang ,  Bingli Dai ,  Yi Hu ,  Jicong Zhang ,  Yong Fan ,  Ke Liu ,  Zhi Chen

IPC: H04B1/40 ,  H03D7/16

CPC classification number: H04B1/40 ,  H03D7/165

Abstract: The present disclosure provides a GaAs monolithic integrated terahertz low-noise communication system transceiver front-end, including an intermediate frequency circuit and a terahertz circuit. The terahertz circuit includes a local oscillator frequency tripler, a local oscillator unidirectional 3 dB filter coupler, a radio frequency 180° filter coupler, and two terahertz GaAs monolithic integrated subharmonic mixers. The local oscillator unidirectional 3 dB filter coupler and the radio frequency 180° filter coupler each include one ring-cylindrical resonant cavity and four rectangular waveguides. The ring-cylindrical resonant cavity is divided into four rectangular waveguides which are correspondingly connected to the four sector-annular resonant cavities, respectively. The present disclosure suppresses the local oscillator noise by adopting a local oscillator unidirectional 3 dB filter coupler and a radio frequency 180° filter coupler with both coupling and filtering functions, thereby achieving a low local oscillator noise transceiver front-end.

公开(公告)号：US12212357B2

公开(公告)日：2025-01-28

申请号：US17873134

申请日：2022-07-25

Applicant: University of Electronic Science and Technology of China

Inventor： Bo Zhang ,  Zhongqian Niu ,  Xiaobo Yang ,  Bingli Dai ,  Yi Hu ,  Jicong Zhang ,  Yong Fan ,  Ke Liu ,  Zhi Chen

IPC: H04B1/40 ,  H03D7/16

Abstract: The present disclosure provides a GaAs monolithic integrated terahertz low-noise communication system transceiver front-end, including an intermediate frequency circuit and a terahertz circuit. The terahertz circuit includes a local oscillator frequency tripler, a local oscillator unidirectional 3 dB filter coupler, a radio frequency 180° filter coupler, and two terahertz GaAs monolithic integrated subharmonic mixers. The local oscillator unidirectional 3 dB filter coupler and the radio frequency 180° filter coupler each include one ring-cylindrical resonant cavity and four rectangular waveguides. The ring-cylindrical resonant cavity is divided into four rectangular waveguides which are correspondingly connected to the four sector-annular resonant cavities, respectively. The present disclosure suppresses the local oscillator noise by adopting a local oscillator unidirectional 3 dB filter coupler and a radio frequency 180° filter coupler with both coupling and filtering functions, thereby achieving a low local oscillator noise transceiver front-end.

公开(公告)号：US20250022107A1

公开(公告)日：2025-01-16

申请号：US18647290

申请日：2024-04-26

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Jiang Qian ,  Xin Ye ,  Haitao Lyu ,  Xiaobo Yang

IPC: G06T5/60 ,  G06T5/30 ,  G06T5/73

Abstract: Provided is a fringe line detection and phase unwrapping method and system based on an FL-Net convolutional neural network. The method includes: constructing the FL-Net convolutional neural network; detecting fringe lines of an input image by using the FL-Net convolutional neural network to obtain an image with detected fringe lines; performing circulation integral on the detected fringe lines to repair the detected fringe lines to thereby obtain an image with repaired fringe lines; performing path integral on the repaired fringe lines to unwrap the repaired fringe lines to thereby obtain an image with unwrapped fringe lines; and identifying error points of the unwrapped fringe lines by using the FL-Net convolutional neural network; and processing the error points. Specifically, an HDC method is used to replace a down-sampling method to avoid the loss of resolution, and residual connection is used to prevent the network from being too deep.

公开(公告)号：US20230238998A1

公开(公告)日：2023-07-27

申请号：US17877896

申请日：2022-07-30

Applicant: University of Electronic Science and Technology of China

Inventor： Bo Zhang ,  Zhongqian Niu ,  Xiaobo Yang ,  Bingli Dai ,  Yi Hu ,  Jicong Zhang ,  Yong Fan ,  Ke Liu ,  Zhi Chen

IPC: H04B1/40 ,  H03D7/16

CPC classification number: H04B1/40 ,  H03D7/165

Abstract: The present disclosure provides a hetero-integrated terahertz low-noise miniaturized image frequency rejection transceiver front-end, including an intermediate frequency circuit and a terahertz circuit arranged up and down, where the terahertz circuit includes a local oscillator frequency tripler, a 135° 3 dB filter coupler, a radio frequency waveguide power divider, and two quartz hetero-integrated subharmonic mixers; resonant cavities of an input unit, a first output unit, an isolation unit, and a second output unit of the 135° 3 dB filter coupler are sequentially coupled through resonant grooves to form a ring structure, a cavity length of the resonant cavity of the input unit is twice that of the resonant cavities of the other three units, and an electrical length of a waveguide of the first output unit is 45° different from that of a waveguide of the second output unit.