Patent ID: 11971451
Assignee: THE 13TH RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method comprising:
constructing an on-wafer calibration piece model set, the on-wafer calibration piece model set comprising one or more on-wafer calibration piece models used in a Terahertz frequency band, wherein each of the one or more on-wafer calibration piece models has a corresponding on-wafer calibration piece;
selecting an on-wafer calibration piece model from the on-wafer calibration piece model set;
in the Terahertz frequency band, using a multi-thread Thru-Reflect-Line (TRL) calibration method to calibrate an on-wafer S parameter measurement system and obtaining a calibrated on-wafer S parameter measurement system, using the calibrated on-wafer S parameter measurement system to measure the on-wafer calibration piece of the selected on-wafer calibration piece model, and obtaining an S parameter of the on-wafer calibration piece;
calculating an admittance of the on-wafer calibration piece according to the S parameter of the on-wafer calibration piece;
determining, according to the on-wafer calibration piece model, an admittance formula corresponding to the on-wafer calibration piece model;
calculating, according to the admittance and the admittance formula, a target parameter in the on-wafer calibration piece model, the target parameter representing crosstalk of the on-wafer calibration piece of the selected on-wafer calibration piece model; and
calibrating, using the on-wafer calibration piece of the selected on-wafer calibration piece model having the target parameter, an on-wafer S parameter measurement system to be calibrated; and
wherein constructing the on-wafer calibration piece model set comprises:
connecting, in parallel, a circuit to two ends of an end surface in an original calibration piece model, the circuit being formed by connecting, in series, two elements that represent the crosstalk of the on-wafer calibration piece, and wherein:
the one or more on-wafer calibration piece models comprise a first load calibration piece model, a first open circuit calibration piece model, and a first short circuit calibration piece model;
the corresponding on-wafer calibration piece of the first load calibration piece model is a first load calibration piece;
the corresponding on-wafer calibration piece of the first open circuit calibration piece model is a first open circuit calibration piece;
the corresponding on-wafer calibration piece of the first short circuit calibration piece model is a first short circuit calibration piece;
the first load calibration piece model comprises a load calibration piece inductor, a load calibration piece direct-current resistor, a first resistor and a first capacitor, wherein both the first resistor and the first capacitor represent crosstalk of the first load calibration piece; a first end of the load calibration piece inductor is connected to a first end of the first resistor to form a first end of a single port of the first load calibration piece model; and a second end of the load calibration piece inductor is connected to a first end of the load calibration piece direct-current resistor, a second end of the first resistor is connected to a first end of the first capacitor, and a second end of the first capacitor is connected to a second end of the load calibration piece direct-current resistor, to form a second end of the single port of the first load calibration piece model;
the first open circuit calibration piece model comprises an open circuit calibration piece capacitor, a second resistor and a second capacitor, wherein both the second resistor and the second capacitor represent crosstalk of the first open circuit calibration piece; a first end of the open circuit calibration piece capacitor is connected to a first end of the second resistor, to form a first end of a single port of the first open circuit calibration piece model; and a second end of the second resistor is connected to a first end of the second capacitor, and a second end of the second capacitor is connected to a second end of the open circuit calibration piece capacitor, to form a second end of the single port of the first open circuit calibration piece model; and
the first short circuit calibration piece model comprises a short circuit calibration piece inductor, a third resistor and a third capacitor, wherein both the third resistor and the third capacitor represent crosstalk of the first short circuit calibration piece; a first end of the short circuit calibration piece inductor is connected to a first end of the third resistor, to form a first end of a single port of the first short circuit calibration piece model; and a second end of the third resistor is connected to a first end of the third capacitor, and a second end of the third capacitor is connected to a second end of the short circuit calibration piece inductor, to form a second end of the single port of the first short circuit calibration piece model.