Jacob Trevithick | IMS 2020 MicroApps Presentation · Outline Marki Microwave Inc. © (2) 1. Simple...
Transcript of Jacob Trevithick | IMS 2020 MicroApps Presentation · Outline Marki Microwave Inc. © (2) 1. Simple...
Jacob Trevithick | IMS 2020 MicroApps Presentation
Outline
(2)Marki Microwave Inc. ©
1. Simple techniques to optimize your phase noise measurement floor
2. Amplifier specific phase noise considerations
3. Amplifier vs. oscillator phase noise, which has more impact?
Holzworth HA7062C Phase
Noise Analyzer• Real-time, cross correlation phase
noise analyzer
• Allows for accurate measurement of
system noise floor
Source: http://www.holzworth.com/Spec_sheets/HA7062C_Web_Datasheet.pdf
Absolute Vs. Residual Phase noise Test setups
(3)Marki Microwave Inc. ©
Residual Phase Noise Basic Test SetupAbsolute Phase Noise Basic Test SetupH
olzw
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HA
70
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C P
hase N
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OSC. Power Supply
DUT Input
LO1
LO2
Driver Amp
Variable Phase Shifter
3-way Power Divider Variable
Phase Shifter
Source Oscillator
DUT
Holzw
orth
HA
70
62
C
Phase N
ois
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DUT Power Supply
DUT Input
DUT
• Measures phase noise of everything in the
DUT pathway, including the input tone• Mostly cancels out source and driver
amplifier phase noise to measure DUT
contribution
Unoptimized noise floor is not desirable
(4)Marki Microwave Inc. ©
• Without using simple techniques to reduce phase noise in the signal
path, the measurement’s noise floor is too high to reasonably measure
any low phase noise component.
Holzw
orth
HA
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62
C P
hase N
ois
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nalyze
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OSC. Power Supply
DUT Input
LO1
LO2
Driver Amp
Variable Phase Shifter
3-way Power Divider Variable
Phase Shifter
Source Oscillator
DUT
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10 100 1,000 10,000 100,000
Resid
ual P
hase N
ois
e F
loor
(dB
c/H
z)
Offset Frequency (Hz)
Residual Phase Noise Floor (dBc/Hz) vs. Offset Frequency,2 GHz Crystek Oscillator, APM-6849PA Driver Amplifier
No optimization
Filters will reduce measurement noise floor
(5)Marki Microwave Inc. ©
• Filtering unwanted oscillator spurs and harmonics drastically reduces noise floor.
• Even Crystal oscillators can produce high level spurs that decrease measurement
accuracy
Holzw
orth
HA
70
62
C P
hase N
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nalyze
r
OSC. Power Supply
DUT Input
LO1
LO2
Variable Phase Shifter
3-way Power Divider
Variable Phase Shifter
Source Oscillator
DUT
Diplexer/LPF
50 Ω
Dip
lexe
r/LP
F
50 Ω
Driver Amp
Diplexer/HPF
LPF
Addition of Filters
50 Ω
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10 100 1,000 10,000 100,000
Resid
ual P
hase N
ois
e F
loor
(dB
c/H
z)
Offset Frequency (Hz)
Residual Phase Noise Floor (dBc/Hz) vs. Offset Frequency,2 GHz Crystek Oscillator, APM-6849PA Driver Amplifier
No optimization
Filters used in Signal Path
Reducing Power supply noise
(6)Marki Microwave Inc. ©
• Minor Improvements can be made by reducing power supply noise
with a Low Noise Voltage Regulator, or with excess bypass
capacitance.
Holzw
orth
HA
70
62
C P
hase N
ois
e A
nalyze
r
OSC. Power Supply
DUT Input
LO1
LO2
Variable Phase Shifter
3-way Power Divider
Variable Phase Shifter
Source Oscillator
DUT
Diplexer/LPF
50 Ω
Dip
lexe
r/LP
F
50 Ω
Driver Amp
Diplexer/HPF
LPF
50 Ω
LNVR used to reduce Power Supply Noise on Driver Amp
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10 100 1,000 10,000 100,000
Resid
ual P
hase N
ois
e F
loor
(dB
c/H
z)
Offset Frequency (Hz)
Residual Phase Noise Floor (dBc/Hz) vs. Offset Frequency,2 GHz Crystek Oscillator, APM-6849PA Driver Amplifier
No optimization
Filters Used in Signal Path
Filters+LNVR
RF Isolators to increase spur suppression
(7)Marki Microwave Inc. ©
• RF isolators reduce reflections and isolate the desire signal frequency.
Isolators are used here to clean up LO reference paths.
Holzw
orth
HA
70
62
C P
hase N
ois
e A
nalyze
r
OSC. Power Supply
DUT Input
LO1
LO2
Variable Phase Shifter
3-way Power Divider
Variable Phase Shifter
Source Oscillator
DUT
Diplexer/LPF
50 Ω
Dip
lexe
r/LP
F
50 Ω
Driver Amp
Diplexer/HPF
LPF
50 Ω
2 GHz 2-Port Isolators
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10 100 1,000 10,000 100,000
Resid
ual P
hase N
ois
e F
loor
(dB
c/H
z)
Offset Frequency (Hz)
Residual Phase Noise Floor (dBc/Hz) vs. Offset Frequency,2 GHz Crystek Oscillator, APM-6849PA Driver Amplifier
No optimization
Filters Used in Signal Path
Filters+LNVR
Filters+LNVR+Isolators
Amplifiers add 1/f Flicker PM noise
8Marki Microwave Inc. ©
• Amplifier phase noise contribution negligible
outside ~1kHz-100kHz frequency offset.
• Higher order phase noise contributions are not
present in amplifier phase noise profile
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Phase N
ois
e (dB
c/H
z)
Offset Frequency (Hz)
Typical Phase Noise Sources for Oscillators and Amplifiers
Typical Oscillator Phase Noise Trend
Typical Amplifier Phase Noise Trend
-10 dB/dec,
Flicker PM,
-20 dB/dec,
White FM,
-30 dB/dec,
Flicker FM,
-40 dB/dec,
Random Walk FM,
0 dB/dec,
White PM,H
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HA
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Phase N
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nalyze
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DUT Power Supply
DUT Input
Source Oscillator
Amplifier
Atten.
Holzw
orth
HA
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C
Phase N
ois
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nalyze
r
DUT Power Supply
DUT Input
Source Oscillator
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-90
10 100 1,000 10,000 100,000 1,000,000
Phase N
ois
e (dB
c/H
z)
Offset Frequency (Hz)
Phase noise (dBc/Hz) vs. Offset Frequency, 1 GHz Carrier Frequency
1 GHz Wenzel Source Absolute Phase Noise
1 GHz Wenzel Source + ADM10026PA Absolute PhaseNoise
ADM1-0026PA Residual Phase Noise
Amplifier dut compression level optimization
(9)Marki Microwave Inc. ©
5
10
15
20
25
30
35
-10 -5 0 5 10 15
Outp
ut
Pow
er
(dB
m)
Input Power (dBm)
Output Power (dBm) vs. Input power, ADM10026PA, +7V/-0.3V Bias
ADM10026PA
Ideal
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Resid
ual P
hase N
ois
e (dB
c/H
z)
Offset Frequency (Hz)
ADM1-0026PA Residual Phase Noise (dBc/Hz) vs. Offset Frequency, 7V/-0.3V, F = 1 GHz
0 dBm Input
+3 dBm Input
+7 dBm Input
+13 dBm Input
5
10
15
20
25
30
35
-10 -5 0 5 10 15 20
Outp
ut
Pow
er
(dB
m)
Input Power(dBm)
Output Power (dBm) vs. Input Power, APM-7098PA 8V/8V Bias
APM-7098PAIdeal
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Resid
ual P
hase N
ois
e (dB
c/H
z)
Offset Frequency (Hz)
APM-7098PA Residual Phase Noise (dBc/Hz) vs. Offset Frequency, 8V/8V, F = 1 GHz
+10 dBm Input
+5 dBm Input
Series vs. Parallel amplifier phase noise
(10)Marki Microwave Inc. ©
• Amplifier phase noise adds in series and
subtracts in parallel
• 2 amps
• Parallel: -3dB
• Series: +3dB
• 4 amps
• Parallel: -6dB
• Series: +6dB
Atten.Atten.
ADM1
4-Way Power Divider
4-Way Power Divider
Parallel Config: DUT
ADM1
Atten.Atten.
ADM1 ADM1
Atten.Atten.
ADM1
Series Config: DUT
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100 1,000 10,000 100,000 1,000,000
Resid
ual P
hase N
ois
e (dB
c/H
z)
Offset Frequency (Hz)
Residual Phase Noise vs. Offset Frequency, Single ADM1, 4 in Series, and 4 in Parallel; F = 1 GHz
Single ADM1
4 ADM1s in Series
4 ADM1s in Parallel
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10 100 1,000 10,000 100,000 1,000,000
Phase N
ois
e (dB
c/H
z)
Offset Frequency (Hz)
Phase Noise (dBc/Hz) vs. Offset Frequency, F = 1 GHz
Crystek 1GHz Osc. + ADM10026PAAbsolute Phase Noise
Crystek 1GHz Osc. Absolute Phase Noise
Oscillators typically dominate phase noise
(11)Marki Microwave Inc. ©
• Oscillator phase noise dominates signal phase noise in most cases, except
in ultra low phase noise applications like FMCW radar.
• Amplifier phase noise contribution is negligible unless oscillator PN is
within ~10dB of the amplifier PN.
Holzw
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HA
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C
Phase N
ois
e A
nalyze
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DUT Power Supply
DUT Input
Source Oscillator
Amplifier
Atten.
Holzw
orth
HA
70
62
C
Phase N
ois
e A
nalyze
r
DUT Power Supply
DUT Input
Source Oscillator
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-100
-90
-80
-70
10 100 1,000 10,000 100,000 1,000,000
Phase N
ois
e (dB
c/H
z)
Offset Frequency (Hz)
Phase noise (dBc/Hz) vs. Offset Frequency, F = 1 GHz
1 GHz Wenzel Source Absolute Phase Noise
1 GHz Wenzel Source + ADM10026PAAbsolute Phase NoiseADM1-0026PA Residual Phase Noise
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10 100 1,000 10,000 100,000 1,000,000
Phase N
ois
e (dB
c/H
z)
Offset Frequency (Hz)
Phase Noise (dBc/Hz) vs. Offset Frequency, F = 1 GHz
Wiltron 69347A Absolute PhaseNoiseWiltron 69347A + ADM10026PAAbsolute Phase Noise
Object 1 at
Object 2 at Mag
nit
ud
e
Frequency
FMCW Spectrum of Two Objects at Small
Marki Microwave’s Low Phase noise amplifiers
Marki Microwave Inc. © 12
Empower our customers to design faster, simplify production, eliminate complexity, and shatter
performance barriers
Positive Only Low Phase Noise Amps• High power for high linearity
• High gain
• Surface mount, bare die, and connectorized module For More Information• Tech Notes
• Videos
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Offset Frequency (Hz)
Phase Noise (dBc/Hz) vs. Offset Frequency; 4 GHz Carrier Frequency, 6V/6V Bias, +15 dBm Input Power
-170 dBc/Hz @ 10 kHz Offset
NEW APM-7098 and
APM-7099!
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