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www.ASB.co.kr

March. 2004

1) S11 & S22 can be improved, at a specific frequency, by moving

an input shunt capacitor (C2) along an input transmission line.

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

separated by 1 MHz.

ASG101

Application Circuit: 900 MHz

Typical Performance

S-parameters

Frequency

900 MHz

Magnitude S21

22 dB

Magnitude S11

1)

-16 dB

Magnitude S22

1)

-19 dB

Output P1dB

18 dBm

Output IP3

2)

31 dBm

Noise Figure

3.0 dB

Supply Voltage

4.5 V

Current

55 mA

Board Layout (FR4, 40x40 mm

Schematic

Gain vs. Temperature

L2=10nH

R1=10 k

Ω

L1=22 nH

C3=100pF

Vs=4.5V

RF IN

RF OUT

C4=

100 pF

C5=

1000 pF

C1=6 pF

50

Ω

ASG101

5.5 mm

C2=5.6 pF

50

Ω

4.5 mm

C6=

1

µF

-60

-40

-20

0

20

40

60

80

100

16

18

20

22

24

26

28

Frequency = 900MHz

600

700

800

900

1000

1100

1200

-35

-30

-25

-20

-15

-10

-5

0

Frequency (MHz)

600

700

800

900

1000

1100

1200

-35

-30

-25

-20

-15

-10

-5

0

Frequency (MHz)