AP602
Frequency
W-CDMA Channel Power
Power Gain
Input Return Loss
Output Return Loss
ACLR
IMD3 @ +27 dBm PEP
Operating Current, Icc
Collector Efficiency
Output P1dB
Quiescent Current, Icq
Vpd, Vbias
Vcc
High Dynamic Range 4W 28V HBT Amplifier
869-960 Application Circuit (AP602-PCB900)
Typical WCDMA Performance at 25
°C
at a channel power of +27 dBm
940 MHz
+27 dBm
15.5 dB
11 dB
6.4 dB
-50 dBc
-50 dBc
103 mA
17 %
+35.7 dBm
80 mA
+5 V
+28 V
V
PD
GND
V
BIAS
V
CC
C15
100pF
C30
100pF
W = .030”
L = 1.570”
C7
1000pF
2 Ohm
See note 4
L10
8.2 nH
See note 5
C19
0.4 pF
See note 6
C30
C24
L3
L10
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. C20 is not required in the final design if there is no DC signal present at the output of the
amplifier circuit.
4. The center of C24 is placed at 0.280” (11.5° @ 940 MHz) from the edge of the AP602 (U1).
5. The center of L10 is placed at 0.570” (23.4° @ 940 MHz) from the edge of the AP602 (U1).
6. The center of C19 is placed at 0.050” (2.1° @ 940 MHz) the center of L10.
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.
869-960 MHz Application Circuit Performance Plots
Gain vs. Frequency
Vcc = 28V, Icq = 80 mA, 25
˚C
S11, S22 vs. Frequency
Vcc = 28V, Icq = 80 mA, 25
˚C
Efficiency vs. Output Power vs. Frequency
CW tone, Vcc = 28V, Icq = 80 mA, 25
˚C
18
17
S11, S22 (dB)
0
50
Collector Efficiency (%)
920 MHz
-5
-10
-15
-20
-25
40
30
20
10
0
940 MHz
960 MHz
Gain (dB)
16
15
14
13
0.8
0.84
0.88
0.92
Frequency (GHz)
0.96
1
S11
S22
0.8
0.85
0.9
0.95
1
1.05
1.1
18
22
26
30
34
Frequency (GHz)
Output Power (dBm)
ACLR1 vs. Output Power vs. Frequency
-42
-46
ACLR1 (dBc)
WCDMA, Vcc= 28V, Icq = 40mA, 25
o
C
IMD vs. Output Power
CW 2-tone signal, 940 MHz,
∆f
= 1 MHz, 28V, 80 mA Icq, 25
˚C
Efficiency vs. Output Power vs. Frequency
WCDMA, Vcc = 28V, Icq = 80 mA, 25
˚C
IMD3L
IMD3U
IMD5
Collector Efficiency (%)
869MHz
894MHz
940MHz
880MHz
920MHz
960MHz
WCDMA 3GPP TM 1+64 DPCH;
PAR = 8.6 @0.01%
60% clipping, Ch. BW = 3.84 MHz;
-40
-50
IMD (dBc)
25
920 MHz
20
15
10
5
0
940 MHz
960 MHz
-50
-54
-58
-62
18
20
22
24
26
28
Output Power (dBm)
-60
-70
-80
22
24
26
28
30
32
Output Power, PEP (dBm)
18
20
22
24
26
28
Average Output Power (dBm)
Unconditionally stable version of this application circuit is available for download off of the website at: http://www.wj.com
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 4 of 11 May 2007 ver 1
WJCI [ WJ COMMUNICATION. INC. ]
