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ASB Inc.

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

April 2017

AST54S

High Gain, Low Noise Amplifier

C1=22 pF

C2=22 pF

RF OUT

AST54S

C4=1 nF

RF IN

L2=15 nH

*P1

R1=820



C5=1 uF

*P1

VDD

R2=5.1 k



L1=8.2 nH

R3=43



C6=0.5 pF

=27



@ 40mA

@ 60mA

C3=0.75 pF

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

WiMAX, LTE

2300 ~ 2700 MHz

+5 V

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: 0.5 mm, Width: 0.3 mm

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

Bottom

Top

Parameter

Symbol

Unit

Frequency

Frequency

2300

2700

2300

2700

Power Gain

dB

13.6

12.3

14.0

12.7

Noise Figure

NF

dB

0.60

0.65

0.65

0.70

Input Return Loss

dB

-17

-18

-18

-18

Output Return Loss

dB

-10

-10

-10

-10

1 dB Gain Compression

Output Power

dBm

18.5

19.5

20.5

20.5

OIP3

dBm

32

33

35

35

Circuit Current

mA

40

40

60

60

2200

2300

2400

2500

2600

2700

2800

0

5

10

15

20

Frequency (MHz)

2200

2300

2400

2500

2600

2700

2800

-25

-20

-15

-10

-5

0

Frequency (MHz)

2200

2300

2400

2500

2600

2700

2800

-20

-15

-10

-5

0

Frequency (MHz)

0

500

1000

1500

2000

2500

3000

3500

0

1

2

3

4

5

Frequency (MHz)