1. Low-Noise Wide-Band Cooled amplifiers with InP Transistors
Juan Daniel Gallego Puyol
Francisco Colomer
Isaac López Fernández
Alberto Barcia
26/04/2004
Oxford

2. OUTLINE Previous experience Technical details Deliverables Schedule
Manpower
26/04/2004
Oxford

3. Experience in Cryogenic Amplifiers (1)
More than 150 cryogenic LNAs for different applications:
IRAM: Grenoble, PdB interferometer, 30m (IF amplifiers)
HERSCHEL:
DMs for mixer groups (CALTECH, DEMIRM, IRAM, JPL, KOSMA, SRON)
DMs Delivered (QMs, FMs, FSs in ALCATEL)
ALMA: Development of 4-8 and 4-12 GHz amplifiers
CFA: Harvard, USA SMA
ARECIBO, Puerto Rico
BORDEAUX Observatory
EMCOR (Atmospheric sensing)
PRONAOS (mm receiver in stratospheric balloon)
CAY: VLBI receivers (X and K band)
ESOC: X-band for Deep Space Antennas
26/04/2004
Oxford

4. Experience in Cryogenic Amplifiers (2)
Wide experience with HEMT devices
More than 30 batches of commercial GaAs transistors tested
Several models of InP transistors measured
JPL-TRW (CHOP program): 14 batches, 9 models
ETH Zurich: 7 batches, 4 models
HRL: 2 batches, 3 models
Chalmers University: 1 batch
26/04/2004
Oxford

5. Transistors TRW T-42 CRYO3 Best performance TRW T-45 CRYO4
ETH T-35
200×0.2 μm gate
Experimental transistor
Design by request
TRW T-45 CRYO4
200×0.1 μm gate
Used in DMs
Space qualified, to be used in HIFI
CHOP developed
TRW T-42 CRYO3
Best performance
0.19 mm
Transistors
0.22 mm
26/04/2004
Oxford

6. Bias cavity with biasing circuits
Transistor area detail. See source
inductive feedback and drain
resistive loading
ETH transistor with bonding wires
MICROTECH
DC connector
Bias cavity with biasing circuits 1 2 3
SMA connector
Input matching circuit
Interstage matching circuits
Output matching circuit
26/04/2004
Oxford

7. YCA 2000 (4-8 GHz)
26/04/2004
Oxford

8. YCA 2000 (4-8 GHz)
26/04/2004
Oxford

9. AMSTAR Deliverables Amplifier for 2.1.1 80-116 GHz 3mm mixers (IRAM)
One unit
IF=4-8 GHz, 3 stages
Due mid 2005
Amplifier for mm mixer (SRON-TuD)
Amplifier for pixel 3 mm test array (IRAM-RAL)
One unit ? (re-use of 2.1.1)
26/04/2004
Oxford

10. AMSTAR Schedule and Milestones
26/04/2004
Oxford

11. AMSTAR Manpower
26/04/2004
Oxford