ECG055C
InGaP HBT Gain Block
Recommended Application Circuit
Vcc
Icc = 65 mA
R4
Bias
Resistor
C4
Bypass
Capacitor
C3
0.018 µF
L1
RF Choke
RF IN
ECG055
C1
Blocking
Capacitor
C2
Blocking
Capacitor
RF OUT
Reference
Designator
L1
C1, C2, C4
50
820 nH
.018 µF
Recommended Component Values
Frequency (MHz)
500
900
1900
2200
220 nH
68 nH
27 nH
22 nH
1000 pF
100 pF
68 pF
68 pF
2500
18 nH
56 pF
3500
15 nH
39 pF
1. The proper values for the components are dependent upon the intended frequency of operation.
2. The following values are contained on the evaluation board to achieve optimal broadband performance:
Ref. Desig.
L1
C1, C2
C3
C4
R4
Value / Type
39 nH wirewound inductor
56 pF chip capacitor
0.018
µF
chip capacitor
Do Not Place
18
Ω
1% tolerance
Size
0603
0603
0603
0805
Recommended Bias Resistor Values
Supply
R1 value
Size
Voltage
6V
18.5 ohms
0805
7V
33.8 ohms
1210
8V
49 ohms
1210
9V
65 ohms
2010
10 V
80 ohms
2010
12 V
111 ohms
2512
The proper value for R1 is dependent upon the supply
voltage and allows for bias stability over temperature.
WJ recommends a minimum supply bias of +6 V. A
1% tolerance resistor is recommended.
Typical Device S-Parameters
S-Parameters (V
device
= +4.8 V, I
CC
= 65 mA, T = 25°C, calibrated to device leads)
Freq (MHz)
S11 (dB)
S11 (ang)
S21 (dB)
S21 (ang)
S12 (dB)
S12 (ang)
S22 (dB)
S22 (ang)
50
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
5500
6000
-38.17
-30.35
-26.51
-23.32
-22.01
-21.87
-21.62
-23.63
-26.77
-31.76
-32.57
-24.49
-18.97
9.34
38.64
30.55
16.54
8.06
-3.80
-11.61
-13.22
-23.25
-20.76
122.50
133.61
125.72
20.30
20.11
19.67
19.00
18.39
17.62
16.91
16.27
15.65
15.09
14.65
14.16
13.73
178.31
161.09
143.04
126.43
111.18
96.71
83.83
71.31
59.48
47.94
36.34
24.39
13.11
-22.39
-22.33
-22.23
-22.09
-21.81
-21.55
-21.16
-20.78
-20.29
-19.79
-19.25
-18.78
-18.29
0.12
0.74
1.87
2.57
3.37
3.41
3.82
3.21
2.65
1.21
-0.79
-3.46
-6.40
-22.58
-23.00
-22.48
-21.21
-20.79
-19.71
-18.27
-17.28
-15.32
-14.24
-12.75
-11.56
-10.39
-1.41
-29.41
-50.33
-77.23
-101.82
-119.95
-141.35
-155.62
-170.83
174.50
163.59
150.73
140.55
Device S-parameters are 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 3 of 4
April 2007
WJCI [ WJ COMMUNICATION. INC. ]
