WJ Communications, Inc. • Phone: 1-800-WJ1-4401 • FAX: 408-577-6620 • e-mail: sales@wj.com • Web site: www.wj.com

April 2002

AM1

Application Circuit: 0.8 to 2.6 GHz (AM1-PCB)

50

75

100

125

150

175

200

Temperature (

°C)

MTBF vs. Temperature

Junction

Ground Tab

Frequency (MHz)

500

1000

1500

2000

3000

2500

S-Parameters

20

10

0

-10

-20

-30

Typical Specifications

Frequency

0.9 GHz

1.9 GHz

2.4 GHz

Magnitude S21

13.4 dB

12.2 dB

11.5 dB

Magnitude S11

-12.5 dB

-13.2 dB

-11.4 dB

Magnitude S22

-21.2 dB

-17.8 dB

-17.3 dB

OIP3

37.0 dBm

37 dBm

37 dBm

Noise Figure

2.4 dB

2.6 dB

2.8 dBm

Bias

Vds = 4.5 V, Id = 75 mA

FR4 Board Layout (T = 14 Mils)

Schematic

S21

S11

S22

AM1

C = 56 pF

RF OUT

RF IN

DC 4.5 V

C = 56 pF

L = 12 nH

L = 10 nH

GND

0603 Package

C = 56 pF

0603 Package

C = 56 pF

0603 Package

L = 12 nH

0603 Package

C = 56 pF

0603 Package

L = 10 nH

+4.5 V

INPUT

OUTPUT

C = 56 pF

3 or more Via

Grounds req.

All Trans. Lines Z = 50 Ohm

GND

NOTE: The application circuit is designed for wide bandwidth. For narrow band applications, S11 and S21 can be improved with an input shunt microstrip element to ground.

20

15

10

5

0

0

500

1000 1500

2000

Frequency (MHz)

2500

3000

3500

4000

0

0

-5

-10

-15

-20

-25

-30

-35

500

1000 1500

2000

Frequency (MHz)

-5

0

5

10

15

20

25

0

5

10

15

20

Input Power (dBm)

2500

3000

3500

4000

Gain vs. Frequency

Input/Output Return Loss

Gain and Output Power vs. Input Power

Vds = 4.5 V

Id = 65 mA

Vds = 4.5 V

Id = 65 mA

Output Power (dBm)

Frequency = 1.9 GHz

Vds = 4.5 V

Id = 69 mA

S11

S22

Gain (dB)

Thermal Specifications

Parameter

Rating

Operating Case Temperature

-40 to +85°C

Thermal Resistance (Maximum)

88°C/W

Junction Temperature

+155°C

(Recommended Maximum)

Notes:

1. Thermal Resistance determined at Maximum Tab Temperature and Maximum Power

Dissipation.

2. Recommended Maximum Junction Temperature insures a MTBF of 1 million hours.

3. Refer to WJ Application Note “AM1 Temperature Effects on Reliability” for more information.