Download PDR_February_2001

Centro Astronómico de Yebes
Observatorio Astronómico Nacional
SPAIN
First Stage Cryogenic IF
Amplifier
Groningen, 1-2 February
2001
FPU Preliminary Design Review
1
Centro Astronómico de Yebes
Observatorio Astronómico Nacional
SPAIN
CONTENTS
• DM Program
– New Devices
– New Design
– Results
• QM & FM Programs: Fabrication by the Industry
– Transfer to Industry
– Processes
– Components
• Summary of critical items
• Planning
Groningen, 1-2 February
2001
FPU Preliminary Design Review
2
Centro Astronómico de Yebes
Observatorio Astronómico Nacional
SPAIN
DM PROGRAM
ETH 2000.2 m
Groningen, 1-2 February
2001
Gain:
~11 dB/stg.
Tn:
~5.5 K
Power:
1.25 mW/stg.
G:
710-5 Hz-1/2 (@1 Hz)
Reliability:
Non passivated
Poor pad adhesion
Only two “batches”
tested
Availability:
?
Space Q.
TBD for HIFI
FPU Preliminary Design Review
3
Centro Astronómico de Yebes
Observatorio Astronómico Nacional
SPAIN
DM PROGRAM
TRW 2000.1 m (Big)
Gain:
~13 dB/stg.
Tn:
~5.0 K
Power:
1.25 mW/stg.
G:
210-5-1.410-4 Hz-1/2
(@1 Hz)
Reliability:
Good!
Oscillations?
Baseline for FIRST
Availability: 41 for DM
Space.Q.
Groningen, 1-2 February
2001
In 2001 for Plank.
FPU Preliminary Design Review
4
Centro Astronómico de Yebes
Observatorio Astronómico Nacional
SPAIN
DM PROGRAM
ETH 1500.2 m
Groningen, 1-2 February
2001
Gain:
~13.5 dB/stg.
Tn:
~ 4.6 K
Power:
1.1 mW/stg.
G:
<610-5 Hz-1/2 (@1 Hz)
Reliability:
Non passivated
Availability:
Not available for DM
Space.Q.
TBD for HIFI
FPU Preliminary Design Review
5
Centro Astronómico de Yebes
Observatorio Astronómico Nacional
SPAIN
DM PROGRAM
TRW 2000.1 m (Small)
Gain:
~14 dB/stg.
Tn:
~4.0 K
Power:
1.5 mW/stg.
G:
-
Reliability:
Very Small
Difficult to bond
DSN (Not available for FIRST)
Availability: Demo
Space.Q.
Groningen, 1-2 February
2001
-
FPU Preliminary Design Review
6
Centro Astronómico de Yebes
Observatorio Astronómico Nacional
SPAIN
DM PROGRAM
ETH 2000.2m
TRW 2000.1m (Big)
ETH 1500.2m
TRW 2000.1m (Small)
Gain
~11 dB/stg.
~13 dB/stg.
~13.5 dB/stg.
~14 dB/stg.
Tn
~5.5 K
~5.0 K
~ 4.6 K
~ 4.0 K
Power
1.25 mW/stg.
1.25 mW/stg.
1.1 mW/stg.
1.5 mW/stg.
G
710-5 Hz-1/2 (@1 Hz)
210-5-1.410-4 Hz-1/2
<610-5 Hz-1/2 (@1 Hz)
-
(@1 Hz)
Non passivated
Good!
Poor pad adhesion
Oscillations?
Only two “batches”
tested
Baseline for FIRST
Availability
?
41 for DM
Not available for DM
Demo
Space Q.
TBD for HIFI
In 2001 for Plank.
TBD for HIFI
-
Reliability
Groningen, 1-2 February
2001
Non passivated
FPU Preliminary Design Review
Very Small
Difficult to bond
DSN (Not available for
FIRST)
7
Centro Astronómico de Yebes
Observatorio Astronómico Nacional
SPAIN
DM PROGRAM
ETH 200
ETH 150
TRW 200 B
TRW 200 S
YCF 2010
Low Power (1.1 mW < Pstage < 1.5 mW)
30
15,0
25
12,5
20
10,0
15
7,5
10
5,0
5
2,5
0
Tn (K)
Gain (dB)
ETH 200
ETH 150
TRW 200 B
TRW 200 S
0,0
3
4
5
6
7
8
9
Freq. (GHz)
Groningen, 1-2 February
2001
FPU Preliminary Design Review
8
Centro Astronómico de Yebes
Observatorio Astronómico Nacional
SPAIN
DM PROGRAM
• New Design
–
–
–
–
–
–
–
–
–
–
–
First prototype using InP TRW 200 devices in both stages
Oscillations?
Substrate glued to the box using epoxy instead solder
MDM connector for the bias circuit
Gate voltage divider included in the bias circuit
Smaller size (582910.5mm)
Mechanical interface with mixer sub-assembly
SMA connectors with “O ribbon” connection (Pending due to delivery of connectors)
Final decision for ESD protection: LEDs or big capacitors (Pending)
EMC filtering (Pending)
Bias circuit in the QM and FM different from that in the DM
Groningen, 1-2 February
2001
FPU Preliminary Design Review
9
Centro Astronómico de Yebes
Observatorio Astronómico Nacional
SPAIN
DM PROGRAM

DM 2001
582910.5mm
623512mm
DM 5001
Groningen, 1-2 February
2001

FPU Preliminary Design Review
10
Centro Astronómico de Yebes
Observatorio Astronómico Nacional
SPAIN
DM PROGRAM
YCF 2 vs YCF 5
YCF 2
YCF 5
Low Power (1.25 mW < Pstage < 1.5 mW)
30
15,0
25
12,5
20
10,0
15
7,5
10
5,0
5
2,5
0
Tn (K)
Gain (dB)
YCF 2
YCF 5
0,0
3
4
5
6
7
8
9
Freq. (GHz)
Groningen, 1-2 February
2001
FPU Preliminary Design Review
11
Centro Astronómico de Yebes
Observatorio Astronómico Nacional
SPAIN
DM PROGRAM
• Results
Device
Goal
Power
Dissipation
Average
Noise Temp.
PD [mW]/Stg.
Tn [K]
2
5
Average
Gain and ripple
Minimum
Output Ref.
Gain
Stability
out [dB]
G Hz-1/2 (@1
Hz)
22 1.5
15
1.410-4
Gav (dB)  G (dB)
YCF 5001
TRW
2
3.9
26.8 1.32
14
310-5-210-4
YCF 200x
ETH
1.25
5.3-5.8
21.7-22.61.2-1.7
13.5-16.5
110-4
Critical Issues: Output Reflection, Gain Stability and Oscillations.
Groningen, 1-2 February
2001
FPU Preliminary Design Review
12
Centro Astronómico de Yebes
Observatorio Astronómico Nacional
SPAIN
QM & FM PROGRAMS: FABRICATION BY THE INDUSTRY
• Transfer to Industry
– Industry: Inexperience in space projects at cryogenic temperatures
– CAY:  Distribution of QA responsibilities.
 Difficulties of small groups in dealing with documentation.
• Processes
– Epoxies (EPOTEK H20E, ABLEFILM 5025)
– “O ribbon” connection for SMA connectors
– Bonding
Groningen, 1-2 February
2001
FPU Preliminary Design Review
13
Centro Astronómico de Yebes
Observatorio Astronómico Nacional
SPAIN
QM & FM PROGRAMS: FABRICATION BY THE INDUSTRY
• Components
– Passive Components
1.- Components are not qualified at cryogenic temperatures
2.- Chip resistors from SOTA, size 0302, only available as commercial
part.
– LEDs or big capacitors for ESD protection
– InP Transistors: Supplying and qualification  JPL
– Isolators: Supplying and qualification  Pamtech delays
– SMA Connectors: Pin orientation
Groningen, 1-2 February
2001
FPU Preliminary Design Review
14
Centro Astronómico de Yebes
Observatorio Astronómico Nacional
SPAIN
SUMMARY OF CRITICAL ITEMS
• Output reflection
• Gain stability
• Oscillations (change of device?)
• ESD Protection: LEDs or big capacitors
• EMC filtering
• Passive components at cryogenic temperature
• Chip resistors from SOTA, size 0302
• Qualification and procurement of Isolators from Pamtech
• SMA Connectors for “O ribbon” connection
Groningen, 1-2 February
2001
FPU Preliminary Design Review
15