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

April 2002

Dual Push-Pull Circuit: 50-860 MHz

Performance Charts

Typical Performance (75 Ohm System)

Frequency

50 MHz

450 MHz

750 MHz 860 MHz

Magnitude S21

13.3 dB

13.3 dB

12.5 dB

12.3 dB

Magnitude S11

-21.0 dB

-18.0 dB

-21.0 dB

-16.2 dB

Magnitude S22

-16.4 dB

-18.2 dB

-20.2 dB

-17.1 dB

OIP2

73.0 dBm

72 dBm

75 dBm

76 dBm

OIP3

45.0 dBm

49 dBm

46 dBm

47 dBm

Bias

Vds = 5 V, Id = 600 mA

FR4 Board Layout (T = 28 Mils to ground plane)

Schematic

RF OUT

DC +5 V

DC +5 V

RF IN

L = 3.3 nH

L = 3.3 nH

C = 100 pF

C = 1000 pF

C = 1000 pF

C = 1000 pF

C = 1000 pF

R = 560

L = 470 nH

L = 470 nH

6 turns bifilar

wire around

ferrite core

6 turns bifilar

wire around

ferrite core

or

MaCOM

ETCI-1-13

Surface Mount

balun

Interior Trans. Lines Z = 37.5 Ohm

Note: Balun and board losses have not been extracted but typically account for 0.4 dB loss midband and 1.1 dB loss at 860 MHz.

0603 Package

L = 3.3 nH

0603 Package

L = 3.3 nH

0603 Package

R = 560 ohm

0603 Package

R = 560 ohm

0603 Package

C = 1000 pF

0603 Package

C = 1000 pF

0603

Package

C = 100 pF

0603

Package

C = 100 pF

0603 Package

C = 1000 pF

0603 Package

C = 1000 pF

L = 470 nH

Coilcraft

1008 Package

L = 470 nH

Coilcraft

1008 Package

+5 V

+5 V

C = 100 pF

R = 560

GND

8 or more Via

Grounds req.

Core: TDK H5C2-T3.1-1.3-1.3

Wire: MWS B2383211

AH22

AH22

Frequency (MHz)

0

100 200

300 400 500

600

700 800

900 1000

S-Parameters

15

10

5

0

-5

-10

-20

-25

-15

S11

Frequency (MHz)

0

100 200

300 400 500

600 700 800

900 1000

Linearity vs. Frequency

80

70

60

40

50

30

20

V = 5 V

I = 600 mA

OIP3

OIP2

S21

S22