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ASB Inc.

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

February 2017

AST163

High Gain, Low Noise Amplifier

1) OIP3 is measured with two tones at an output power of -5 dBm/tone

separated by 1MHz.

2) It is the test result when the R1 value is 1.1 kohm. A user can easily increase

an operating current by choosing R1 value.

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Schematic

S-parameters & Noise Figure

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: 3.5 mm, Width: 0.3 mm

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

1400

1450

1500

1550

1600

1650

1700

1750

1800

0

5

10

15

20

Frequency (MHz)

-40

25

85

1400

1450

1500

1550

1600

1650

1700

1750

1800

-20

-15

-10

-5

0

5

Frequency (MHz)

-40

25

85

1400

1450

1500

1550

1600

1650

1700

1750

1800

-25

-20

-15

-10

-5

0

Frequency (MHz)

-40

25

85

0

500

1000

1500

2000

2500

3000

3500

0

1

2

3

4

5

Frequency (MHz)

Frequency (MHz)

1575

Magnitude S21 (dB)

13.5

14

Magnitude S11 (dB)

-10

-12

Magnitude S22 (dB)

-10

-14

Output P1dB (dBm)

10

10

16

18

Noise Figure (dB)

1.10

0.95

Supply Voltage (V)

+3

+3

Current (mA)

3.7

6.0

APPLICATION CIRCUIT

GPS

1575 MHz

+3 V

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