US 12,451,869 B2
Phase shifter, driving method for the phase shifter and antenna system
Zongmin Liu, Beijing (CN); Wei Li, Beijing (CN); Junwei Guo, Beijing (CN); Xichao Fan, Beijing (CN); Feng Qu, Beijing (CN); and Biqi Li, Beijing (CN)
Assigned to Beijing BOE Technology Development Co., Ltd., Beijing (CN)
Appl. No. 17/786,213
Filed by Beijing BOE Technology Development Co., Ltd., Beijing (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Sep. 26, 2021, PCT No. PCT/CN2021/120618
§ 371(c)(1), (2) Date Jun. 16, 2022,
PCT Pub. No. WO2023/044847, PCT Pub. Date Mar. 30, 2023.
Prior Publication US 2024/0162607 A1, May 16, 2024
Int. Cl. H03H 11/16 (2006.01)
CPC H03H 11/16 (2013.01) 18 Claims
OG exemplary drawing
 
1. A phase shifter, comprising: a control module, a digital-to-analog conversion module and a phase shift structure, wherein
the control module is configured to generate a plurality of correction signals according to phase shift degrees of the phase shift structure;
the digital-to-analog conversion module is configured to generate a driving signal according to the correction signals;
the phase shift structure is configured to shift a phase of a microwave signal passing therethrough according to the driving signal, and
a data generation module configured to generate a data signal according to status data of the phase shifter; the digital-to-analog conversion module comprises: a resistor string and a switch group; the resistor string is divided into a plurality of resistor sub-strings connected in series, and each resistor sub-string comprises a plurality of resistors connected in series; the switch group comprises a plurality of switches, and at least one resistor is connected between every two adjacent switches; and the switches are configured to electrically connect the resistor string to the phase shift structure, wherein
a voltage across each resistor sub-string is set to be a voltage difference between different correction signals; and the driving signal is set to be a sum of voltages of the plurality of resistors; and
the switches are configured to transmit the driving signal to the phase shift structure under control of the data signal.