US Patent No. 9,529,027

METHOD FOR ESTIMATING PCB RADIATED EMISSIONS


Patent No. 9,529,027
Issue Date December 27, 2016
Title Method For Estimating Pcb Radiated Emissions
Inventorship Tzyy-Sheng Horng, Kaohsiung (TW)
Cheng-Yu Ho, Kaohsiung (TW)
Kai-Syuan Chen, Kaohsiung (TW)
Assignee NATIONAL SUN YAT-SEN UNIVERSITY, Kaohsiung (TW)

Claim of US Patent No. 9,529,027

1. A method for estimating PCB radiated emissions including:
providing a BCI (Bulk Current Injection) probe and a vector network analyzer, wherein the BCI probe comprises an inducting
portion, a measuring space surrounded by the inducting portion and a measuring port coupled to the inducting portion, the
vector network analyzer comprises a signal output port, a probe-measuring port and a signal input port;

performing a calibration step for providing a clamping device having a chamber, a first calibration port and a second calibration
port, wherein the BCI probe is disposed in the chamber, the signal output port of the vector network analyzer is coupled to
the first calibration port, the probe-measuring port is coupled to the measuring port of the BCI probe, the signal input port
is coupled to the second calibration port, wherein a calibration signal is outputted from the signal output port of the vector
network analyzer to the first calibration port to make the BCI probe output an induction signal transmitted to the probe-measuring
port of the vector network analyzer for obtaining a transfer impedance of the BCI probe;

performing a measurement step for proving an object having at least one input port and at least one output port, wherein the
object is disposed in the measuring space, the signal output port is coupled to the at least one input port of the object,
the probe-measuring port is coupled to the measuring port of the BCI probe, the signal input port is coupled to the at least
one output port of the object, wherein a test signal is outputted from the signal output port of the vector network analyzer
to the at least one input port of the object to make the BCI probe output a power signal transmitted to the probe-measuring
port of the vector network analyzer, wherein an output signal is outputted from the at least one output port to the signal
input port of the vector network analyzer for measuring a measurement-input transfer function between the power signal and
the test signal and an output-input transfer function between the output signal and the test signal; and

performing an estimation step for estimating radiated emissions of the object based on the measurement-input transfer function,
the output-input transfer function and the transfer impedance.