1.8 nH
1.2 pF
2.7 nH
1.2 pF
110 Ohm
.03 λ
50 Ohm
.02 λ
50 Ohm
.02 λ
110 Ohm
.03 λ
RF Output
RF Input
DUT
15 nH
47 nH
15 Ohm
2.2 µF
Drain
DC Supply
2.2 µF
Gate
DC Supply
Figure 7. Simplified schematic of production test board. Primary purpose is to show 15 Ohm series resistor placement in
gate supply. Transmission line tapers, tee intersections, bias lines and parasitic values are not shown.
Gamma Load and Source at Optimum OIP3 and P1dB Tuning Conditions
The device’s optimum OIP3 and P1dB measurements were determined using a load pull system at 4.5V,
200 mA quiesent bias:
Optimum OIP3
Freq
(GHz)
Gamma Source
Gamma Load
Mag Ang
OIP3
(dBm)
Gain
(dB)
P1dB
(dBm)
PAE
(%)
Mag
Ang
0.9
2.0
2.4
3.9
0.776
0.872
0.893
0.765
152
0.549
0.683
0.715
0.574
-178
-179
-174
-144
43.3
43.1
42.8
41.7
17.94
15.06
14.03
9.47
29.63
30.12
29.90
29.02
63.8
66.8
64.5
52
-171
-162
-132
Optimum P1dB
Freq
(GHz)
Gamma Source
Gamma Load
Mag Ang
OIP3
(dBm)
Gain
(dB)
P1dB
(dBm)
PAE
(%)
Mag
Ang
0.9
2.0
2.4
3.9
0.773
0.691
0.797
0.602
153
147
164
-163
0.784
0.841
0.827
0.794
-173
-166
-166
-155
38.0
36.4
36.2
35.4
19.28
10.34
8.43
31.9
31.4
31.2
31
54.23
38.15
37.38
32.72
7.03
4
AGILENT [ AGILENT TECHNOLOGIES, LTD. ]
