公开(公告)号：WO2018182508A1

公开(公告)日：2018-10-04

申请号：PCT/SG2018/050132

申请日：2018-03-23

Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH

Inventor： SHI, Bo ,  LEONG, Siew Weng ,  LUO, Bin ,  WANG, Wenjiang

IPC: H03F1/32

CPC classification number: H03F1/3247 ,  H03F1/3276 ,  H03F1/3282 ,  H03F1/3294 ,  H03F3/19 ,  H03F3/245 ,  H03F2200/192 ,  H03F2200/451 ,  H03F2201/3233

Abstract: An apparatus for optimizing the bias setting of a RF predistortion linearizer for a power amplifier to operate across different frequency channels is provided. The apparatus may include a radio frequency power amplifier. The apparatus may include a radio frequency predistortion linearizer that predistorts a radio frequency signal and passes the predistorted radio frequency signal to the radio frequency power amplifier for amplification. The radio frequency predistortion linearizer may be configured based on a set of bias control settings for different operating frequencies. The apparatus may include a filtering and detection component configured to monitor performance of the radio frequency power amplifier and fine-tune the set of bias control settings based on the monitored performance of the radio frequency power amplifier.

公开(公告)号：WO2022211734A1

公开(公告)日：2022-10-06

申请号：PCT/SG2022/050176

申请日：2022-03-29

Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH

Inventor： CHIN, Po Shin Francois ,  NASIMUDDIN, - ,  SHI, Bo ,  QING, Xianming

IPC: H01Q21/06 ,  H01Q3/34 ,  H01Q21/29 ,  H01Q5/42 ,  H01Q3/24 ,  H01Q23/00

Abstract: There is provided a phased array antenna, including: a receiver antenna array including one or more groups of receiver radiating elements, each group of receiver radiating elements including a first receiver subarray of receiver radiating elements and a second receiver subarray of receiver radiating elements; a plurality of receiver core chips, including, for each of the one or more groups of receiver radiating elements, a first receiver core chip associated with the first receiver subarray and a second receiver core chip associated with the second receiver subarray; and a plurality of receiver feeding networks, including, for each of the one or more groups of receiver radiating elements, a first receiver feeding network including a plurality of first feed lines and a second receiver feeding network including a plurality of second feed lines. In particular, for each of the one or more groups of receiver radiating elements, a first receiver radiating element of the first receiver subarray and the second receiver core chip associated with the second receiver subarray are arranged at least substantially at or along a center of the second receiver subarray and a first receiver radiating element of the second receiver subarray and the first receiver core chip associated with the first receiver subarray are arranged at least substantially at or along a center of the first receiver subarray such that the plurality of first feed lines and the plurality of second feed lines have at least substantially equal length.