公开(公告)号：US11742594B2

公开(公告)日：2023-08-29

申请号：US17569503

申请日：2022-01-06

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Quan Xue ,  Wenquan Che ,  Siyu Li ,  Shaowei Liao

IPC: H01Q21/24 ,  H01Q9/04

CPC classification number: H01Q21/24 ,  H01Q9/0421

Abstract: A low-profile circularly polarized isoflux antenna module is provided, which relates to the field of microelectronic antennas, and provides a solution to solve the contradiction between size and gain in conventional technology. The antenna module includes an antenna array, a substrate, a connection plate, and a feeding plate that are stacked in sequence. The feeding network on the feeding plate is electrically connected to the antenna array through probe passing through the connection plate and the substrate. The antenna array includes two or more concentrically distributed antenna elements, and each antenna element forms mutually independent concentric circularly polarized apertures through feed control. The structure is simple to assemble and easy to process, light in weight, small in size, and low in profile.

公开(公告)号：US11245359B2

公开(公告)日：2022-02-08

申请号：US17138916

申请日：2020-12-31

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Chao Li ,  Quan Xue ,  Liang Wu ,  Shaowei Liao

IPC: H03B5/12 ,  H03B27/00

Abstract: A quadrature voltage-controlled oscillator circuit with phase shift includes two voltage-controlled oscillators with the same structure, wherein the two voltage-controlled oscillators are connected to each other through input and output ports, and the two voltage-controlled oscillators respectively include a cross-coupled oscillating circuit, an injection locking circuit, a resonant circuit and a voltage-controlled current source circuit which are electrically connected to each other; and signals are injected through the injection locking circuit and coupled with the oscillating circuit, so as to output a quadrature signal. An oscillator is enabled to operate stably in one mode by means of a simple circuit structure, and a good phase shift can be provided for the resonant circuit in a lower frequency band; and meanwhile, a tuning range of the oscillator is improved without increasing phase noise.

公开(公告)号：US11600927B2

公开(公告)日：2023-03-07

申请号：US17243607

申请日：2021-04-29

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Wenquan Che ,  Wanchen Yang ,  Lizheng Gu ,  Quan Xue ,  Shaowei Liao

IPC: H01Q1/48 ,  H01Q9/04 ,  H01Q3/30

Abstract: A coupling-offset path branch and a high-isolation millimeter-wave phased array antenna based on the same. The high-isolation millimeter-wave phased array antenna includes a plurality of radiating stacked microstrip patch elements, a shielding metal wall, several coupling-offset path branches, a metal ground plane, a feeding network layer, several ports, wherein the first port is excited, energy of the feeding network layer is coupled to a corresponding radiating stacked microstrip patch element through an I-shaped slot, and the energy is transmitted to the second port adjacent to the first port through an inherent coupling path portion; the coupling-offset path branch is introduced to offset the inherent coupling, thus achieving a high-isolation performance between the first port and the second port. By adopting the simple decoupling branch, the invention can achieve a high-isolation effect in a wide band, improve an active standing-wave ratio and a scanning capability of the array antenna.