公开(公告)号：US20170201225A1

公开(公告)日：2017-07-13

申请号：US14992315

申请日：2016-01-11

Applicant: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： YEONG-HER WANG ,  CHUN-CHI SU ,  EN-YANG LIN ,  MING-WHAY LAI

IPC: H03H7/20 ,  H03H7/19

CPC classification number: H03H7/20 ,  H03H7/19

Abstract: An all-pass wideband phase shifter is introduced. Series connections in parallel between two 3 dB hybrid couplers include combining two 90-degree phase shifters and two attenuators to form a novel phase shifter framework. Under specific controls of continuous 90-degree phase shifters and attenuators in four quadrants, 360-degree all-pass phase shifting is effected by phase shifting and vector composition.

公开(公告)号：US20170201020A1

公开(公告)日：2017-07-13

申请号：US14990931

申请日：2016-01-08

Applicant: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： HSI-TSENG CHOU ,  DUN-YUAN CHENG ,  KUNG-YU LU ,  NAN-WEI CHEN ,  MING-WHAY LAI

IPC: H01Q3/34

Abstract: A method for correcting antenna phases includes a beam angle calculating step, beam angle adjusting step, antenna emission measuring step and beam angle correcting step. The method involves comparing a difference between the ideal antenna phase value and the measured beam angle value, determining according to the difference that the beam direction of the antenna needs to be corrected, and adding the difference to a current ideal antenna phase value in the algorithm to calculate another ideal antenna phase value for being sent to the phase control circuit and used in executing the beam angle adjusting step in a next instance of measurement process until the beam angle correcting step finds the difference which requires no correction of the beam direction of the antenna. Therefore, temperature-dependent errors do not occur to beam directions, thereby enhancing the communication efficiency of an antenna system.