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 10 May 2007 ver 1

AP601

High Dynamic Range 1.8W 28V HBT Amplifier

1930-1990 MHz Application Circuit (AP601-PCB1960)

Typical WCDMA Performance at 25

°C

at a channel power of +24 dBm

Frequency

1960 MHz

W-CDMA Channel Power

+24 dBm

Power Gain

15 dB

Input Return Loss

11 dB

Output Return Loss

10 dB

ACLR

-49 dBc

IMD3 @ +24 dBm PEP

-62 dBc

Operating Current, Icc

52 mA

Collector Efficiency

17 %

Output P1dB

+32.7 dBm

Quiescent Current, Icq

40 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 L3 is placed at 0.035” (3.0

° @ 1960 MHz) from the center of C5.

4. The center of C5 is placed at 0.085” (7.3

° @ 1960 MHz) from the edge of the AP601 (U1).

5. The center of C19 is placed at 0.755” (64.5

° @ 1960 MHz) from the edge of the AP601 (U1).

6. The center of C18 is placed at 0.300” (25.6

° @ 1960 MHz) from the center of C19.

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 location L3 for this particular reference design.

1930-1990 MHz Application Circuit Performance Plots

Gain vs. Output Power vs. Frequency

CW tone, Vcc = 28V, Icq = 40 mA, 25 ˚C

11

12

13

14

15

16

23

25

27

29

31

33

Output Power (dBm)

1930 MHz

1960 MHz

1990 MHz

S11, S22 vs. Frequency

Vcc = 28V, Icq = 40 mA, 25 ˚C

-25

-20

-15

-10

-5

0

1.8

1.85

1.9

1.95

2

2.05

2.1

Frequency (GHz)

S11

S22

Efficiency vs. Output Power vs. Frequency

CW tone, Vcc = 28V, Icq = 40 mA, 25 ˚C

0

10

20

30

40

50

18

22

26

30

34

Output Power (dBm)

1930 MHz

1960 MHz

1990 MHz

ACLR1 vs. Output Power vs. Frequency

Vcc = 28V, Icq = 40 mA, 25 ˚C

-65

-60

-55

-50

-45

-40

16

18

20

22

24

26

Average Output Power (dBm)

1930 MHz

1960 MHz

1990 MHz

WCDMA 3GPP TM 1+64DPCH,

60% clipping, PAR = 8.6 dB

IMD vs. Output Power

CW 2-tone signal, 940 MHz, ∆f = 1 MHz, 28V, 40 mA Icq, 25 ˚C

-80

-70

-60

-50

-40

22

24

26

28

30

32

Output Power, PEP (dBm)

IMD3L

IMD3U

IMD5

ACPR vs. Output Power vs. Frequency

IS-95A, 9 Ch. Fwd, 1960 MHz, Vcc = 28V, Icq = 40 mA, 25 ˚C

-80

-70

-60

-50

-40

17

19

21

23

25

27

Average Output Power (dBm)

C5

2.2pF

See note 4

4.7 nH

See note 3

C19

2.4pF

See note 5

C28

0.8pF

See note 6

C7

1000pF

C27

0.1μF

W = .030”

L = .980”