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ASB Inc.

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

April 2017

AST54S

High Gain, Low Noise Amplifier

200

400

600

800

1000

1200

0

5

10

15

20

25

Frequency (MHz)

200

400

600

800

1000

1200

-30

-25

-20

-15

-10

-5

0

Frequency (MHz)

200

400

600

800

1000

1200

-25

-20

-15

-10

-5

0

Frequency (MHz)

0

500

1000

1500

2000

2500

3000

0

1

2

3

4

5

6

7

8

9

10

Frequency [MHz]

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

C1=100 pF

C2=100 pF

RF OUT

AST54S

C4=1 nF

RF IN

L3=22 nH

*P1

R1=820



C5=1 uF

*P1

VDD

R2=5.1 k



L2=100 nH

R3=43



L1=10 nH

R4=430



C3=1 nF

C6=0.75 pF

=27



@ 40mA

@ 60mA

*P1 Length : 3.0 mm width : 0.3mm

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: 3 mm, Width: 0.3 mm

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

Bottom

Parameter

Symbol

Unit

Frequency

Frequency

698

787

698

787

Power Gain

dB

19.0

18.0

19.5

18.5

Noise Figure

NF

dB

0.4

0.4

0.4

0.4

Input Return Loss

dB

-18

-18

-18

-18

Output Return Loss

dB

-10

-10

-10

-10

1 dB Gain Compression

Output Power

dBm

17

17

19

19

OIP3

dBm

30

31

33

33

Circuit Current

mA

40

40

60

60

Top

LTE 700

698 ~ 787 MHz

+5 V