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ASB Inc.

 sales@asb.co.kr  Tel: +82-42-528-7225

April 2017

AST54S

High Gain, Low Noise Amplifier

1) OIP3 is measured with two tones at an output power of +4 dBm/tone separated by 1MHz.

Schematic

S-parameters & K-factor

APPLICATION CIRCUIT

Note: 1) The length of the strip line P1 is given as below at

the PCB with Er = 4.5 and T = 0.8 mm.

P1 Length: 2.0 mm, Width: 0.3 mm

2) Gain and S11 are in trade-off and varied with the length of P1

Bottom

Top

Parameter

Symbol

Test Conditions

MIN.

TYP.

MAX.

Unit

Power Gain

F = 1575 MHz

14.5

dB

Noise Figure

NF

F = 1575 MHz

0.5

dB

Input Return Loss

F = 1575 MHz

-18

dB

Output Return Loss

F = 1575 MHz

-10

dB

1 dB Gain Compression

Output Power

F = 1575 MHz

17.5

dBm

OIP3

F = 1575 MHz

28

dBm

Circuit Current

F = 1575 MHz

Non-RF

18

mA

C1=100 pF

C2=100 pF

RF OUT

AST54S

C4=1 nF

RF IN

L2=8.2 nH

*P1

R1=820



C5=1 uF

*P1

VDD

R2=5.1 k



L1=3.9 nH

R3=10



C3=0.75 pF

0

500

1000

1500

2000

2500

3000

-30

-25

-20

-15

-10

-5

0

5

Frequency (MHz)

0

500

1000

1500

2000

2500

3000

0

5

10

15

20

Frequency (MHz)

0

500

1000

1500

2000

2500

3000

-20

-15

-10

-5

0

5

Frequency (MHz)

0

500

1000

1500

2000

2500

3000

0

1

2

3

4

5

Frequency (MHz)

GPS,GLONASS,Galileo,Compass

1559 ~ 1610 MHz

+3 V, 18 mA