Post on 01-Mar-2022
Paul Scherrer Institut • 5232 Villigen PSI 12th ESLS - Diamond - 10/2008 M. Gaspar
500 MHZ Solid State Amplifier Design Results of the 4KW Prototype
M. Gaspar, M. Pedrozzi
Paul Scherrer Institut • 5232 Villigen PSI 12th ESLS - Diamond - 10/2008 M. Gaspar
4KW Validation Prototype – Components Produced and Tested
PC Master Controller: 2 Available and Already Tested (PSI Design)
Power Supply Controller:
25 Boards Available (Programmed and Tested) (PSI Design)
Power Splitter:
2 8-Way Prototypes Working (PSI Design)
New 18-way Design in Progress (PSI Design)
250W Amplifier Module:
22 Modules Available (Assembled and Tested) (PSI Design)
High Power Coupler: 1 Piece Available and Calibrated. Tested OK @ Pout=4KW (Industry)
New Design in Progress (PSI Design)
Output Power Combiner: 2 18-Way Combiners Ready (Finished and Tested)
(PSI Design)
Also Successfully Tested under Maximum Output Power
Paul Scherrer Institut • 5232 Villigen PSI 12th ESLS - Diamond - 10/2008 M. Gaspar
4KW Amplifier Configuration
Paul Scherrer Institut • 5232 Villigen PSI 12th ESLS - Diamond - 10/2008 M. Gaspar
4KW Basic Components( 3D Conceptual View – Not To Scale )
+
+
2x
18x
18x
+
+
=4.5KW max!
Paul Scherrer Institut • 5232 Villigen PSI 12th ESLS - Diamond - 10/2008 M. Gaspar
250W Amplifier Module
Key Performance Parameters
3D-View of 500MHz Amplifier Module
Output Power(with Circulator)
250W 280W
Gain 22dB 20dBEfficiency ~ 54% ~ 50%
Operation Max
Pout(W) vs Pin(W)
0
50
100
150
200
250
300
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2Pin(W)
Pout
(W)
Pout (dBm)
Phase(S21) (°) vs Pout(W)
80.00
90.00
100.00
110.00
120.00
130.00
140.00
150.00
0 50 100 150 200 250 300Pout(W)
Phas
e(S2
1) (°
)
Phase (°)
Paul Scherrer Institut • 5232 Villigen PSI 12th ESLS - Diamond - 10/2008 M. Gaspar
250W Amplifier Module
Output Power versus Input Power Efficiency versus Output Power
Performance of all available RF Modules
Pout(W) x Pin(W)
0
50
100
150
200
250
300
0 0.5 1 1.5 2 2.5Pin(W)
Pout
(W)
M#1
M#2
M#3
M#4
M#5
M#6
M#7
M#8
M#9
M#10
M#11
M#18
M#19
M#20
M#13
M#16
M#12
M#21
M#17
M#15
M#0
Efficiency(%) x Pout(W)
0.0
10.0
20.0
30.0
40.0
50.0
60.0
0 50 100 150 200 250 300
Pout(W)
Effic
ienc
y(%
)
M#1
M#2
M#3
M#4
M#5
M#6
M#7
M#8
M#9
M#10
M#11
M#18
M#19
M#20
M#13
M#16
M#12
M#21
M#17
M#15
M#0
Paul Scherrer Institut • 5232 Villigen PSI 12th ESLS - Diamond - 10/2008 M. Gaspar
250W Amplifier Module
Gain versus Output Power Phase Delay versus Output Power
Performance of all available RF Modules
Mag(S21) (dB) x Pout(W)
0
5
10
15
20
25
0 50 100 150 200 250 300Pout(W)
Mag
(S21
) (dB
)
M#1
M#2
M#3
M#4
M#5
M#6
M#7
M#8
M#9
M#10
M#11
M#18
M#19
M#20
M#13
M#16
M#12
M#21
M#17
M#15
M#0
Phase(S21) (°) x Pout (W)
0
20
40
60
80
100
120
140
160
180
200
0 50 100 150 200 250 300
Pout (W)P
hase
(S21
) (°)
M#1
M#2
M#3
M#4
M#5
M#6
M#7
M#8
M#9
M#10
M#11
M#18
M#19
M#20
M#13
M#16
M#12
M#21
M#17
M#15
M#0
Paul Scherrer Institut • 5232 Villigen PSI 12th ESLS - Diamond - 10/2008 M. Gaspar
250W Amplifier Module
Pout(W) x Vdd(V)
150
170
190
210
230
250
270
290
22 24 26 28 30 32 34
Vdd(V)
Pout
(W)
Pin=1.77WPin=1.65W
Phase(S21) (°) x Vdd(V)
120121122123124125126127128129130
22 24 26 28 30 32 34
Vdd(V)
Phas
e(S
21) (
°)
Pin=1.77WPin=1.65W
Output Power Variation due to Forced Compression Phase Delay Variation due to Forced Compression
1.
Since our Power Supply Controllers allow the Power Supply Voltage (Vdd) to be changed remotely we use Forced Compression to equalize the output powers of all amplifiers and then maximize the Combining Efficiency.
2.
Notice that the Phase Delay is not very much influenced by variations in Power Supply Voltage. So Forced Compression is a viable method.
Forced Compression as a Useful Method
Paul Scherrer Institut • 5232 Villigen PSI 12th ESLS - Diamond - 10/2008 M. Gaspar
250W Amplifier Module
• Total 22 Modules Produced Now (18 for Amplifier, 4 Spares).
• All Modules Fully Assembled and Tested.
• Performance Agrees With Previous Results from Prototype.
• Remote Monitoring Working all right.
Paul Scherrer Institut • 5232 Villigen PSI 12th ESLS - Diamond - 10/2008 M. Gaspar
18 Way Combiner – 500MHz
BW > 10MHz (S11 < -30dB)
Precision Required for 18 Ways Realized with no Extra Costs
Efficiency > 99.6% (Overall Loss < 20W @ Pout=4.5KW)
Key Performance Parameters
Measurement
HFSS Simulation
PSI development
Inner Conductor Temperature @ Pout=4KW = 65°C (estimated)
Outter Conductor Temperature @ Pout=4KW = 43°C
High Power Temperature Measurement Results
Paul Scherrer Institut • 5232 Villigen PSI 12th ESLS - Diamond - 10/2008 M. Gaspar
Power Supply Controller (and Complete Monitoring System)
RS485Network
Power SupplyOutput
AmplifierMonitoring
Extra DigitalI/Os
Extra AnalogI/Os
DC/DC Converter
High Voltage Input and Filtering
Output Power:
600W
Output Voltage Range:
16.7V to 33.5V
Input Voltage Range:
200V to 400V
Efficiency:
~ 90%
Can be Remotely Programmed and Monitored
Extra Analog and Digital I/Os
Multi-tasking Script Operating System (SOS)
Interlock Reaction Time: ~ 1uS
Full Monitoring Loop Time:
~ 150mS
Main Features
25 Pieces Available Now
19 Pieces – No Failures in Long Duration Tests
LEDs for Interlock and operation
Design Finished
Paul Scherrer Institut • 5232 Villigen PSI 12th ESLS - Diamond - 10/2008 M. Gaspar
• Total 25 Boards Produced (18 for Amplifier, 7 Spares).
• Operating System Installed.
• All Tests Completed (Power and Monitoring).
• 19 Boards Passed Initial Long Duration Tests without Failures.
Power Supply Controller
Paul Scherrer Institut • 5232 Villigen PSI 12th ESLS - Diamond - 10/2008 M. Gaspar
Output Power versus Input Power Overall Efficiency versus Output Power
Measurement Results
4KW Solid-State Power Amplifier
Pout[W] x Pin[W]
0
500
1000
1500
2000
2500
3000
3500
4000
4500
0 5 10 15 20 25 30 35
Pin[W]
Pout
[W]
Efficiency[%] x Pout[W]
0
5
10
15
20
25
30
35
40
45
50
0 500 1000 1500 2000 2500 3000 3500 4000 4500
Pout[W]
Effic
ienc
y[%
]
Paul Scherrer Institut • 5232 Villigen PSI 12th ESLS - Diamond - 10/2008 M. Gaspar
SOSDAQ
Linux Data Acquisition and Monitoring Software
Results @ Pout=4KW
Client-Server Design
Graphical User Interface provided by Web-Browser
Data Interpolation, Translation and Interlock Checks Easily Configurable.
Hardware and Software Devices Allowed.
Easily Expandable for Larger Installation.
Main Features
Paul Scherrer Institut • 5232 Villigen PSI 12th ESLS - Diamond - 10/2008 M. Gaspar
4KW Solid-State Power Amplifier Teststand in SLS
Monitoring PC (Linux)
4KW Solid-State Power Amplifier
22KW Water Cooler
Interlocks Plus Low Level RF
Water Flux Measurement
Water Temperature Sensors
Paul Scherrer Institut • 5232 Villigen PSI 12th ESLS - Diamond - 10/2008 M. Gaspar
Conclusions
• 18 RF Modules Successfully Combined and Tested Under High Power.
• Very Stable Operation. About more than a Month of Operation and
Tests.
• All Produced Modules showed very Similar Performance as the First Prototype RF Module.
•
Forced Compression Proven to be Easy and Useful Method to Improve Amplitude Equalization of all RF Modules and to Optimize Overall Efficiency. At Pout=4KW the Output Power of all Modules could be Equalized to about +/-5% around the Average value.
• Power Supply Controller Heavily Tested. Monitoring and Data Acquisition Concept Proven.
• 18-Way Power Combiner Successfully Tested under High RF Power.
• Long Duration Tests in Preparation.
• Complete Amplifier proven to be Very Compact and Light.