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：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.

公开(公告)号：US11218199B2

公开(公告)日：2022-01-04

申请号：US17084601

申请日：2020-10-29

Applicant: University of Electronic Science and Technology of China

Inventor： Zhi Chen ,  Xinying Ma ,  Wenjie Chen

IPC: H04B7/0456 ,  H04B7/06 ,  H04B7/145 ,  H04L29/06

Abstract: A design method for an intelligent reflecting surface (IRS) aided terahertz secure communication system is provided. The IRS aided terahertz multi-input single-output (MISO) system includes a base station (BS) equipped with NBS antennas, an IRS equipped with NIRS reflecting elements, a single-antenna user and a single-antenna eavesdropper. The BS transmits signals by the active hybrid beamforming to the relay of the IRS, and the IRS adjusts the signals and reflects the signals to the mobile user, which suppresses the received signal of the eavesdropper. The present invention maximizes the downlink secrecy rate by establishing a joint optimization function and maximizes the system data transmission rate by a cross-entropy based search method.

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.