Groningen, 1-2 February 2001

FPU Preliminary Design Review 1

First Stage Cryogenic IF First Stage Cryogenic IF AmplifierAmplifier

Centro Astronómico de YebesCentro Astronómico de Yebes

Observatorio Astronómico NacionalObservatorio Astronómico Nacional

SPAINSPAIN

Groningen, 1-2 February 2001

FPU Preliminary Design Review 2

Centro Astronómico de YebesObservatorio Astronómico Nacional

SPAIN

• DM Program– New Devices

– New Design

– Results

• QM & FM Programs: Fabrication by the Industry– Transfer to Industry

– Processes

– Components

• Summary of critical items

• Planning

CONTENTSCONTENTS

Groningen, 1-2 February 2001

FPU Preliminary Design Review 3

Centro Astronómico de YebesObservatorio Astronómico Nacional

SPAIN

DM PROGRAMDM PROGRAM

Groningen, 1-2 February 2001

FPU Preliminary Design Review 4

Centro Astronómico de YebesObservatorio Astronómico Nacional

SPAIN

DM PROGRAMDM PROGRAM

Groningen, 1-2 February 2001

FPU Preliminary Design Review 5

Centro Astronómico de YebesObservatorio Astronómico Nacional

SPAIN

DM PROGRAMDM PROGRAM

Groningen, 1-2 February 2001

FPU Preliminary Design Review 6

Centro Astronómico de YebesObservatorio Astronómico Nacional

SPAIN

DM PROGRAMDM PROGRAM

Groningen, 1-2 February 2001

FPU Preliminary Design Review 7

Centro Astronómico de YebesObservatorio Astronómico Nacional

SPAIN

DM PROGRAMDM PROGRAM

Groningen, 1-2 February 2001

FPU Preliminary Design Review 8

Centro Astronómico de YebesObservatorio Astronómico Nacional

SPAIN

DM PROGRAMDM PROGRAM

3 4 5 6 7 8 90

5

10

15

20

25

30

YCF 2010Low Power (1.1 mW < P

stage < 1.5 mW)

ETH 200 ETH 150 TRW 200 B TRW 200 S

Gai

n (d

B)

Freq. (GHz)

0,0

2,5

5,0

7,5

10,0

12,5

15,0

Tn (

K)

ETH 200 ETH 150 TRW 200 B TRW 200 S

Groningen, 1-2 February 2001

FPU Preliminary Design Review 9

Centro Astronómico de YebesObservatorio Astronómico Nacional

SPAIN

DM PROGRAMDM 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 (582910.5mm)– 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 10

Centro Astronómico de YebesObservatorio Astronómico Nacional

SPAIN

DM PROGRAMDM PROGRAM

DM 2001

DM 5001

623512mm582910.5mm

Groningen, 1-2 February 2001

FPU Preliminary Design Review 11

Centro Astronómico de YebesObservatorio Astronómico Nacional

SPAIN

DM PROGRAMDM PROGRAM

Groningen, 1-2 February 2001

FPU Preliminary Design Review 12

Centro Astronómico de YebesObservatorio Astronómico Nacional

SPAIN

DM PROGRAMDM PROGRAM

• Results

Critical Issues: Output Reflection, Gain Stability and Oscillations.

DevicePower

Dissipation

AverageNoise Temp.

AverageGain and ripple

MinimumOutput Ref.

GainStability

PD [mW]/Stg. Tn [K] Gav (dB) G (dB) out [dB]

G Hz-1/2 (@1Hz)

Goal 2 5 22 1.5 15 1.410-4

YCF 5001 TRW 2 3.9 26.8 1.32 14 310-5-210-4

YCF 200x ETH 1.25 5.3-5.8 21.7-22.61.2-1.7 13.5-16.5 110-4

Groningen, 1-2 February 2001

FPU Preliminary Design Review 13

Centro Astronómico de YebesObservatorio Astronómico Nacional

SPAIN

QM & FM PROGRAMS: FABRICATION BY THE INDUSTRYQM & 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 14

Centro Astronómico de YebesObservatorio Astronómico Nacional

SPAIN

QM & FM PROGRAMS: FABRICATION BY THE INDUSTRYQM & 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 15

Centro Astronómico de YebesObservatorio Astronómico Nacional

SPAIN

SUMMARY OF CRITICAL ITEMSSUMMARY 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