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www.ASB.co.kr

June 2003

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

an input shunt capacitor (C2) and inductor (L2) along an input transmission line.

2) OIP3 is measured with two tones at an output power of +8 dBm/tone

separated by 1 MHz.

Application Circuit: 2000 MHz

Typical Performance

S-parameters

Frequency

2000 MHz

Magnitude S21

10.5 dB

Magnitude S11

1)

-20 dB

Magnitude S22

1)

-15 dB

Output P1dB

24 dBm

Output IP3

2)

40 dBm

Noise Figure

3.5 dB

Supply Voltage

6 V

Current

110 mA

Schematic

ASG304

Board Layout (FR4, 40x40 mm

Gain vs. Temperature

ASG304

C1=10 pF

C2=2.7 pF

GND

L2=3.3 nH

5 mm

RF IN

50

Ω

C3=5 pF

RF OUT

8.75 mm

R1=7.5 k

Ω

L1=56 nH

Vcc=6 V

C5=

1000 pF

C4=

100 pF

C6=

0.1

µF

1800

1900

2000

2100

2200

-60

-40

-20

0

20

85

25

-40

Frequency (MHz)

1800

1900

2000

2100

2200

-30

-25

-20

-15

-10

85

25

-40

Frequency (MHz)

1800

1900

2000

2100

2200

0

5

10

15

20

85

25

-40

Frequency (MHz)

1800

1900

2000

2100

2200

-30

-20

-10

0

10

85

25

-40

Frequency (MHz)

-60

-40

-20

0

20

40

60

80

100

10

11

12

13

14

Frequency=2 GHz

Temperature (