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 5 June 2006
AG403-89
InGaP HBT Gain Block Product Information
Application Circuit
Recommended Component Values
Reference Frequency (MHz)
Designator 50 500 900 1900 2200 2500 3500
L1 820 nH 220 nH 68 nH 27 nH 22 nH 18 nH 15 nH
C1, C2, C4 .018 µF 1000 pF 100 pF 68 pF 68 pF 56 pF 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. Value / Type Size
L1 39 nH wirewound inductor 0603
C1, C2 56 pF chip capacitor 0603
C3 0.018 PF chip capacitor 0603
C4 Do Not Place
R1 18.2 : 1% tolerance 0805
Recommended Bias Resistor Values
S upply
Voltage R1 value S ize
6 V 18.2 ohms 0805
7 V 34.8 ohms 1206
8 V 52 ohms 1210
9 V 68 ohms 1210
10 V 85 ohms 2010
12 V 118 ohms 2010
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 Data
S-Parameters (Vdevice = +4.91 V, ICC = 60 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 -19.61 177.23 21.83 177.04 -24.78 -0.17 -22.82 -6.34
250 -19.53 164.13 21.76 166.28 -24.78 -0.67 -22.85 -36.76
500 -19.98 148.98 21.50 152.58 -24.76 -1.94 -20.98 -67.92
750 -19.59 135.77 21.14 139.87 -24.70 -3.15 -19.68 -95.98
1000 -19.32 125.81 20.75 127.26 -24.57 -4.60 -18.20 -118.01
1250 -19.04 114.76 20.24 115.54 -24.48 -5.94 -17.02 -138.28
1500 -18.89 106.30 19.78 104.52 -24.31 -7.30 -15.72 -153.58
1750 -18.90 99.82 19.22 93.67 -24.21 -8.91 -14.97 -167.98
2000 -18.45 93.74 18.67 83.89 -23.99 -10.68 -13.99 177.86
2250 -17.82 89.28 18.15 74.12 -23.73 -13.06 -13.14 164.91
2500 -17.41 85.22 17.63 64.90 -23.54 -14.80 -12.33 152.53
2750 -16.98 83.90 17.08 55.77 -23.30 -17.90 -11.50 142.75
3000 -16.65 81.71 16.59 47.05 -23.10 -20.41 -10.88 133.20
3250 -16.05 78.22 16.05 38.38 -22.77 -23.59 -10.41 123.51
3500 -15.32 73.05 15.59 30.02 -22.50 -27.27 -9.74 114.72
3750 -14.91 70.48 15.13 21.97 -22.35 -30.55 -9.16 106.63
4000 -14.26 66.47 14.66 13.47 -22.14 -34.47 -8.70 98.83
4250 -13.66 64.93 14.18 5.51 -21.84 -38.64 -8.19 91.89
4500 -12.96 61.21 13.76 -2.89 -21.69 -43.24 -7.71 84.22
4750 -12.24 56.96 13.25 -10.44 -21.43 -47.17 -7.30 76.68
5000 -11.68 53.26 12.76 -18.40 -21.30 -51.83 -6.78 69.88
5250 -11.13 47.25 12.26 -25.99 -21.15 -56.25 -6.55 62.72
5500 -10.19 43.57 11.70 -33.42 -21.05 -61.19 -6.04 56.01
5750 -9.56 40.23 11.32 -40.21 -20.83 -65.84 -5.62 51.16
6000 -9.31 35.79 10.88 -48.95 -20.57 -71.02 -5.50 44.91
Device S-parameters are available for download off of the website at: http://www.wj.com
C1
Blocking
Capacitor
RF OUT
L1
RF Choke
C3
0.018 µF
R1
Resistor
C4
C2
Vcc
Icc = 60 mA
AG403-89