Specifications and information are subject to change without notice

WJ Communications, Inc

• Phone 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: sales@wj.com • Web site: www.wj.com

Page 5 of 14 May 2007 ver 1

AP603

High Dynamic Range 7W 28V HBT Amplifier

920-960 MHz Application Circuit (AP603-PCB900)

Typical WCDMA Performance at 25

°C

at a channel power of +30 dBm

Frequency

940 MHz

W-CDMA Channel Power

+30 dBm

Power Gain

17 dB

Input Return Loss

11 dB

Output Return Loss

5.5 dB

ACLR

-52 dBc

IMD3 @ +30 dBm PEP

-52 dBc

Operating Current, Icc

217 mA

Collector Efficiency

16.6 %

Output P1dB

+38.5 dBm

Quiescent Current, Icq

160 mA

Vpd, Vbias

+5 V

Vcc

+28 V

Notes:

1. The primary RF microstrip line is 50

Ω.

2. Components shown on the silkscreen but not on the schematic are not used.

3. The center of C24 is placed at 0.245” (10.0

° @ 940 MHz) from the center of C5.

4. The center of C5 is placed at .060” (2.5

° @ 940 MHz) from the edge of the AP603 (U1).

5. The center of L4 is placed at 0.170” (7.0

° @ 940 MHz) from the edge of the AP603 (U1). L4

is required to be an AVX 0805 type.

6. The center of C25 is placed at 0.480” (19.7

° @ 940 MHz) from the center of L4.

7. The bold-faced RF trace is for the DC bias feed. The stub’s length is approximately a ¼ λ.

8. The main RF trace is cut at component L3 and L4 for this particular reference design.

920-960 MHz Application Circuit Performance Plots

W-CDMA 3GPP Test Model 1+64 DPCH, 60% clipping, PAR = 8.6 dB @ 0.01% Probability, 3.84 MHz BW

Gain vs. Output Power vs. Frequency

CW tone, Vcc = 28V, Icq = 160 mA, 25 ˚C

13

14

15

16

17

18

30

32

34

36

38

40

Output Power (dBm)

920 MHz

940 MHz

960 MHz

S11, S22 vs. Frequency

Vcc = 28V, Icq = 160 mA, 25 ˚C

-25

-20

-15

-10

-5

0

0.8

0.85

0.9

0.95

1

1.05

1.1

Frequency (GHz)

S11

S22

Efficiency vs. Output Power vs. Frequency

CW tone, Vcc = 28V, Icq = 160 mA, 25 ˚C

0

10

20

30

40

50

14

18

22

26

30

34

38

Output Power (dBm)

920 MHz

940 MHz

960 MHz

ACLR1 vs. Output Power vs. Frequency

WCDMA, Vcc = 28V, Icq = 160 mA, 25 ˚C

-65

-60

-55

-50

-45

-40

22

24

26

28

30

32

Average Output Power (dBm)

920 MHz

940 MHz

960 MHz

IMD vs. Output Power

CW 2-tone signal, 940 MHz, ∆f = 1 MHz, 28V, 160 mA Icq, 25 ˚C

-75

-70

-65

-60

-55

-50

26

28

30

32

34

36

Output Power, PEP (dBm)

IMD3L

IMD3U

IMD5

Efficiency vs. Output Power vs. Frequency

WCDMA, Vcc = 28V, Icq = 160 mA, 25 ˚C

0

5

10

15

20

25

22

24

26

28

30

32

Average Output Power (dBm)

920 MHz

940 MHz

960 MHz

5.6pF

See note 3

See note 4

See note 5

See note 6

1.8 Ohm

C7

1000pF

L3

C5