26/04/2004 Oxford 1

FG-IGNCentro Astronómico de Yebes

AMSTARCAY

Low-Noise Wide-Band Cooled amplifiers with InP Transistors

Juan Daniel Gallego PuyolFrancisco Colomer

Isaac López FernándezAlberto Barcia

26/04/2004 Oxford 2

FG-IGNCentro Astronómico de Yebes

AMSTARCAY

OUTLINE

• Previous experience• Technical details• Deliverables• Schedule• Manpower

26/04/2004 Oxford 3

FG-IGNCentro Astronómico de Yebes

AMSTARCAY

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)– CAY: VLBI receivers (X and K band)– ESOC: X-band for Deep Space Antennas

26/04/2004 Oxford 4

FG-IGNCentro Astronómico de Yebes

AMSTARCAY

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

FG-IGNCentro Astronómico de Yebes

AMSTARCAY

3 4 5 6 7 8 90

5

10

15

20

25

30

YCF 2 InP devices comparisonOptimum noise bias

ETH T-35 TRW T-45 TRW T-42

Gai

n (d

B)

Freq. (GHz)

0.0

2.5

5.0

7.5

10.0

12.5

15.0

Tn (K

)

ETH T-35 TRW T-45 TRW T-42

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 200×0.1 μm gate Best performance

0.22 mm

0.19

mm Transistors

26/04/2004 Oxford 6

FG-IGNCentro Astronómico de Yebes

AMSTARCAY

Interstage matching circuits

MICROTECHDC connector

SMA connector

Bias cavity with biasing circuits

Transistor area detail.See sourceinductive feedbackand drainresistive loading

ETH transistorwith bonding wires

1 2 3

Input matching circuit Output matching circuit

26/04/2004 Oxford 7

FG-IGNCentro Astronómico de Yebes

AMSTARCAY

YCA 2000 (4-8 GHz)

26/04/2004 Oxford 8

FG-IGNCentro Astronómico de Yebes

AMSTARCAY

YCA 2000 (4-8 GHz)

3 4 5 6 7 8 90

5

10

15

20

25

30

35

40

G

Gai

n [d

B]

f [GHz]

0

2

4

6

8

10

12

14

16

Tn

YCA 2011 1 0703PD<9 mW, T=14 K

Noi

se T

empe

ratu

re [K

]

26/04/2004 Oxford 9

FG-IGNCentro Astronómico de Yebes

AMSTARCAY

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 2.1.3 0.5 mm mixer (SRON-TuD)– One unit– IF=4-8 GHz, 3 stages– Due mid 2005

• Amplifier for 2.4.1 4-pixel 3 mm test array (IRAM-RAL)– One unit ? (re-use of 2.1.1)

26/04/2004 Oxford 10

FG-IGNCentro Astronómico de Yebes

AMSTARCAY

AMSTAR Schedule and Milestones

26/04/2004 Oxford 11

FG-IGNCentro Astronómico de Yebes

AMSTARCAY

AMSTAR Manpower