2.2 pF
3.3 pF
50 Ohm
.02
λ
22 nH
15 Ohm
100 pF
2.2
µF
110 Ohm
.03
λ
110 Ohm
.03
λ
50 Ohm
.02
λ
4.7 pF
RF Input
DUT
12 nH
RF Output
Gate
DC Supply
Drain
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 Tuning Conditions
The device’s optimum OIP3 measurements were determined using a Maury load pull system at 4V, 135 mA
quiesent bias. The gamma load and source over frequency are shown in the table below:
Freq
(GHz)
0.9
2.0
3.9
5.8
Gamma Source
Mag
Ang
0.616
0.310
0.421
0.402
-37.1
34.5
167.5
-162.8
Gamma Load
Mag
Ang
0.249
0.285
0.437
0.418
130.0
168.3
-161.6
-134.1
OIP3
(dBm)
40.3
41.5
41.5
41.0
Gain
(dB)
16.5
13.4
10.5
7.9
P1dB
(dBm)
23.4
24.8
24.7
24.7
PAE
(%)
43.2
51.9
42.8
36.6
4
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