US 2025/0192812 A1Published application

Phase characteristic measurement device, signal generator and signal analyzer having same, and phase characteristic measurement method

AssigneeAnritsu Corporation

InventorsHiroto FUJISAKI, Takashi MORI

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Abstract

A phase characteristic measurement device includes a first detector 11 that receives and detects two patterns of three-tone signals of a first three-tone signal obtained by combining the three waves of angular frequencies ω1, ω2, ω3 (wherein ω2−ω1=ω3−ω2=Δω) and a second three-tone signal obtained by changing a phase of one tone out of the first three-tone signal, a BPF 12 that allows only a beat component of an angular frequency difference Δω of adjacent waves of the three-tone signal from the signal output from the first detector to pass therethrough, a second detector 13 that detects power of the beat component that has passed through the BPF 12, a voltmeter 14 that measures the voltage of the signal output from the second detector, and a phase calculator 15 that calculates the phase based on the measured voltage value.

Claims18

Dependent claims

A phase characteristic measurement device comprising:

a first detector that receives and detects a first three-tone signal obtained by combining three waves e1, e2, e3 expressed by Expression (1) and a second three-tone signal obtained by combining three waves e′, e′2, e′3 expressed by Expression (2);
a bandpass filter that, from the signal output from the first detector, passes a frequency component of the angular frequency difference Δω and blocks a frequency component twice the angular frequency difference Δω and a direct current component;
a second detector that detects the signal that has passed through the bandpass filter;
a voltmeter that measures a voltage of the signal output from the second detector;
and
a phase calculator that calculates a phase φ2″ expressed by Expression (3),
e
i
=
cos
⁢
(
ω
i
⁢
t
+
ϕ
i
)
,
i
=
1
,
2
,
3
(
1
)
(where ωi represents an angular frequency, φi represents a phase, t represents time, and ω2−ω1=ω3−ω2=Δω)
e
1
′
=
cos
⁢
(
ω
1
⁢
t
+
ϕ
1
)
e
2
′
=
sin
⁢
(
ω
2
⁢
t
+
ϕ
2
)
e
3
′
=
cos
⁢
(
ω
3
⁢
t
+
ϕ
3
)
(
2
)
ϕ
2
″
=
d
2
⁢
ϕ
d
⁢
ω
2
❘
"\[LeftBracketingBar]"
ω
=
ω
2
=
ϕ
3
-
2
⁢
ϕ
2
+
ϕ
1
Δ
⁢
ω
2
=
2
Δ
⁢
ω
2
⁢
tan
-
1
(
±
E
beat
′
E
beat
)
(
3
)
(where Ebeat represents a value proportional to power of the signal that has passed through the bandpass filter, the value being obtained from a voltage value measured by the voltmeter when the first detector receives the first three-tone signal, and E′beat represents a value proportional to power of the signal that has passed through the bandpass filter, the value being obtained from a voltage value measured by the voltmeter when the first detector receives the second three-tone signal).

132 more elements

A phase characteristic measurement device comprising:

a first detector that receives and detects three-tone signals obtained by combining three waves e1, e2, e3 expressed by Expression (4);
a bandpass filter that, from the signal output from the first detector, passes a frequency component of the angular frequency difference Δω and blocks a frequency component twice the angular frequency difference Δω and a direct current component;
a second detector that detects the signal that has passed through the bandpass filter;
a voltmeter that measures a voltage of the signal output from the second detector;
and
a phase calculator that calculates a phase φ2″ expressed by Expression (5),
e
1
=
a
1
⁢
cos
⁢
(
ω
1
⁢
t
+
ϕ
1
)
e
2
(
ψ
)
=
a
2
⁢
cos
⁢
(
ω
2
⁢
t
+
ϕ
2
-
ψ
/
2
)
e
3
=
a
3
⁢
cos
⁢
(
ω
3
⁢
t
+
ϕ
3
)
(
4
)
(where a1, a2, a3 represent amplitudes, ω1, ω2, ω3 represent angular frequencies, φ1, φ2, φ3, ψ represent phases, t represents time, ψ=0, π/2, π, and ω2−ω1=ω3−ω2=Δω)
ϕ
2
″
=
1
Δ
⁢
ω
2
⁢
tan
-
1
(
E
beat
(
0
)
-
2
⁢
E
beat
(
π
/
2
)
+
E
beat
(
π
)
E
beat
(
0
)
-
E
beat
(
π
)
)
(
5
)
(where Ebeat(0) represents a value proportional to power of the signal that has passed through the bandpass filter, the value being obtained from a voltage value measured by the voltmeter when the first detector receives the three-tone signal when ψ=0, Ebeat(π/2) represents a value proportional to power of the signal that has passed through the bandpass filter, the value being obtained from a voltage value measured by the voltmeter when the first detector receives the three-tone signal when ψ=π/2, and Ebeat(π) represents a value proportional to power of the signal that has passed through the bandpass filter, the value being obtained from a voltage value measured by the voltmeter when the first detector receives the three-tone signal when ψ=π).

116 more elements

A phase characteristic measurement device comprising:

a first detector that receives and detects three-tone signals obtained by combining three waves e1, e2, e3 expressed by Expression (6);
a bandpass filter that, from the signal output from the first detector, passes a frequency component of the angular frequency difference Δω and blocks a frequency component twice the angular frequency difference Δω and a direct current component;
a second detector that detects the signal that has passed through the bandpass filter;
a voltmeter that measures a voltage of the signal output from the second detector;
and
a phase calculator that calculates a phase φ2″ expressed by Expression (7),
e
1
=
a
1
⁢
cos
⁢
(
ω
1
⁢
t
+
ϕ
1
)
e
2
(
ψ
)
=
a
2
⁢
cos
⁢
(
ω
2
⁢
t
+
ϕ
2
-
ψ
/
2
)
e
3
=
a
3
⁢
cos
⁢
(
ω
3
⁢
t
+
ϕ
3
)
(
6
)
(where a1, a2, a3 represent amplitudes, ω1, ω2, ω3 represent angular frequencies, φ1, φ2, φ3, ψ represent phases, t represents time, ψ=0, π/2, π, and ω2−ω1=ω3−ω2=Δω)
ϕ
2
″
=
1
Δ
⁢
ω
2
⁢
a
⁢
tan
⁢
2
⁢
(
E
beat
(
0
)
-
2
⁢
E
beat
(
π
/
2
)
+
E
beat
(
π
)
,
E
beat
(
0
)
-
E
beat
(
π
)
)
(
7
)
(where Ebeat(0) represents a value proportional to power of the signal that has passed through the bandpass filter, the value being obtained from a voltage value measured by the voltmeter when the first detector receives the three-tone signal when ψ=0, Ebeat(π/2) represents a value proportional to power of the signal that has passed through the bandpass filter, the value being obtained from a voltage value measured by the voltmeter when the first detector receives the three-tone signal when ψ=π/2, and Ebeat(π) represents a value proportional to power of the signal that has passed through the bandpass filter, the value being obtained from a voltage value measured by the voltmeter when the first detector receives the three-tone signal when ψ=π).

120 more elements

A phase characteristic measurement method comprising:

a first three-tone signal generation step of generating a first three-tone signal obtained by combining three waves e1, e2, e3 expressed by Expression (8);
a first detection step of detecting the first three-tone signal;
a first bandpass filter step of, from the signal obtained in the first detection step, passing a frequency component of the angular frequency difference Δω and blocking a frequency component twice the angular frequency difference Δω and a direct current component;
a second detection step of detecting the signal passed in the first bandpass filter step;
a first voltage measurement step of measuring a voltage of the signal obtained in the second detection step;
a second three-tone signal generation step of generating a second three-tone signal obtained by combining three waves e′1, e′2, e′3 expressed by Expression (9);
a third detection step of detecting the second three-tone signal;
a second bandpass filter step of, from the signal obtained in the third detection step, passing a frequency component of the angular frequency difference Δω between tones with adjacent frequencies of the second three-tone signal, and blocking a frequency component twice the angular frequency difference Δω and a direct current component;
a fourth detection step of detecting the signal passed in the second bandpass filter step;
a second voltage measurement step of measuring a voltage of the signal obtained in the fourth detection step;
and
a phase calculation step of calculating a phase φ2″ expressed by Expression (10) from a voltage value measured in the first voltage measurement step and a voltage value measured in the second voltage measurement step,
e
i
=
cos
⁢
(
ω
i
⁢
t
+
ϕ
i
)
,
i
=
1
,
2
,
3
(
8
)
(where ωi represents an angular frequency, Φi represents a phase, t represents time, and ω2−ω1=ω3−ω2=Δω)
e
1
′
=
cos
⁢
(
ω
1
⁢
t
+
ϕ
1
)
e
2
′
=
sin
⁢
(
ω
2
⁢
t
+
ϕ
2
)
e
3
′
=
cos
⁢
(
ω
3
⁢
t
+
ϕ
3
)
(
9
)
ϕ
2
″
=
d
2
⁢
ϕ
d
⁢
ω
2
❘
"\[LeftBracketingBar]"
ω
=
ω
2
=
ϕ
3
-
2
⁢
ϕ
2
+
ϕ
1
Δ
⁢
ω
2
=
2
Δ
⁢
ω
2
⁢
tan
-
1
(
±
E
beat
′
E
beat
)
(
10
)
(where Ebeat represents a value proportional to power of the signal that has passed in the first bandpass filter step, the value being obtained from the voltage value measured in the first voltage measurement step, and E′beat represents a value proportional to power of the signal that has passed in the second bandpass filter step, the value being obtained from the voltage value measured in the second voltage measurement step).

138 more elements

A phase characteristic measurement method comprising:

a three-tone signal generation step of generating a three-tone signal obtained by combining three waves e1, e2, e3 expressed by Expression (11);
a first detection step of detecting the three-tone signal;
a bandpass filter step of, from the signal obtained in the first detection step, passing a frequency component of the angular frequency difference Δω and blocking a frequency component twice the angular frequency difference Δω and a direct current component;
a second detection step of detecting the signal passed in the bandpass filter step;
a voltage measurement step of measuring a voltage of the signal obtained in the second detection step;
and
a phase calculation step of setting a phase y in Expression (11) to 0, π/2, and π, and calculating a phase φ2″ expressed by Expression (12) from each voltage value measured by executing the three-tone signal generation step, the first detection step, the bandpass filter step, the second detection step, and the voltage measurement step, respectively,
e
1
=
a
1
⁢
cos
⁢
(
ω
1
⁢
t
+
ϕ
1
)
e
2
(
ψ
)
=
a
2
⁢
cos
⁢
(
ω
2
⁢
t
+
ϕ
2
-
ψ
/
2
)
e
3
=
a
3
⁢
cos
⁢
(
ω
3
⁢
t
+
ϕ
3
)
(
11
)
(where a1, a2, a3 represent amplitudes, ω1, ω2, ω3 represent angular frequencies, φ1, φ2, φ3, ψ represent phases, t represents time, ψ=0, π/2, π, and ω2−ω1=ω3−ω2=Δω)
ϕ
2
″
=
1
Δ
⁢
ω
2
⁢
tan
-
1
(
E
beat
(
0
)
-
2
⁢
E
beat
(
π
/
2
)
+
E
beat
(
π
)
E
beat
(
0
)
-
E
beat
(
π
)
)
(
12
)
(where Ebeat(0) represents a value proportional to power of the signal that has passed in the bandpass filter step, the value being obtained from the voltage value measured in the voltage measurement step when ψ=0, Ebeat(π/2) represents a value proportional to power of the signal that has passed in the bandpass filter step, the value being obtained from the voltage value measured in the voltage measurement step when ψ=π/2, and Ebeat(π) represents a value proportional to power of the signal that has passed in the bandpass filter step, the value being obtained from the voltage value measured in the voltage measurement step when ψ=π).

117 more elements

A phase characteristic measurement method comprising:

a three-tone signal generation step of generating a three-tone signal obtained by combining three waves e1, e2, e3 expressed by Expression (13);
a first detection step of detecting the three-tone signal;
a bandpass filter step of, from the signal obtained in the first detection step, passing a frequency component of the angular frequency difference Δω and blocking a frequency component twice the angular frequency difference Δω and a direct current component;
a second detection step of detecting the signal passed in the bandpass filter step;
a voltage measurement step of measuring a voltage of the signal obtained in the second detection step;
and
a phase calculation step of setting a phase y in Expression (13) to 0, π/2, and π, and calculating a phase φ2″ expressed by Expression (14) from each voltage value measured by executing the three-tone signal generation step, the first detection step, the bandpass filter step, the second detection step, and the voltage measurement step, respectively,
e
1
=
a
1
⁢
cos
⁢
(
ω
1
⁢
t
+
ϕ
1
)
e
2
(
ψ
)
=
a
2
⁢
cos
⁢
(
ω
2
⁢
t
+
ϕ
2
-
ψ
/
2
)
e
3
=
a
3
⁢
cos
⁢
(
ω
3
⁢
t
+
ϕ
3
)
(
13
)
(where a1, a2, a3 represent amplitudes, ω1, ω2, ω3 represent angular frequencies, φ1, φ2, φ3, ψ represent phases, t represents time, ψ=0, π/2, π, and ω2−ω1=ω3−ω2=Δω)
ϕ
2
″
=
1
Δ
⁢
ω
2
⁢
a
⁢
tan
⁢
2
⁢
(
E
beat
(
0
)
-
2
⁢
E
beat
(
π
/
2
)
+
E
beat
(
π
)
,
E
beat
(
0
)
-
E
beat
(
π
)
)
(
14
)
(where Ebeat(0) represents a value proportional to power of the signal that has passed in the bandpass filter step, the value being obtained from the voltage value measured in the voltage measurement step when ψ=0, Ebeat(π/2) represents a value proportional to power of the signal that has passed in the bandpass filter step, the value being obtained from the voltage value measured in the voltage measurement step when ψ=π/2, and Ebeat(π) represents a value proportional to power of the signal that has passed in the bandpass filter step, the value being obtained from the voltage value measured in the voltage measurement step when ψ=π).

121 more elements

Dependencies are inferred from the claim text.