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TetraFET
D1028UK
METAL GATE RF SILICON FET
MECHANICAL DATA
C (2 pls)
B
G (typ)
2 1
H D
3
P (2 pls) A
5
4
GOLD METALLISED MULTI-PURPOSE SILICON DMOS RF FET 300W - 28V - 175MHz PUSH-PULL
FEATURES
* SIMPLIFIED AMPLIFIER DESIGN
E (4 pls) F I
N
M
O
J
K
* SUITABLE FOR BROAD BAND APPLICATIONS
DRAIN 1 GATE 2
DR
PIN 1 PIN 3 PIN 5 SOURCE (COMMON) DRAIN 2 GATE 1 DIM A B C D E F G H I J K M N O P Millimetres 19.05 10.77 45 9.78 5.71 27.94 1.52R 10.16 22.22 0.13 2.72 1.70 5.08 34.03 1.57R Tol. 0.50 0.13 5 0.13 0.13 0.13 0.13 0.13 MAX 0.02 0.13 0.13 0.50 0.13 0.08 PIN 2 PIN 4
* LOW Crss * SIMPLE BIAS CIRCUITS
Inches 0.75 0.424 45 0.385 0.225 1.100 0.060R 0.400 0.875 0.005 0.107 0.067 0.200 1.340 0.062R
Tol. 0.020 0.005 5 0.005 0.005 0.005 0.005 0.005 MAX 0.001 0.005 0.005 0.020 0.005 0.003
* LOW NOISE * HIGH GAIN - 13 dB MINIMUM
APPLICATIONS
* VHF/UHF COMMUNICATIONS from 1 MHz to 200 MHz
ABSOLUTE MAXIMUM RATINGS (Tcase = 25C unless otherwise stated)
PD BVDSS BVGSS ID(sat) Tstg Tj Power Dissipation Drain - Source Breakdown Voltage Gate - Source Breakdown Voltage Drain Current Storage Temperature Maximum Operating Junction Temperature 438W 70V 20V 30A -65 to 150C 200C
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01/01
D1028UK
ELECTRICAL CHARACTERISTICS (Tcase = 25C unless otherwise stated) Parameter Test Conditions Min.
PER SIDE
BVDSS IDSS IGSS VGS(th) gfs Drain-Source Breakdown Voltage Zero Gate Voltage Drain Current Gate Leakage Current Gate Threshold Voltage* Forward Transconductance* Gate Threshold Voltage Matching Between Sides VGS = 0 VDS = 28V VGS = 20V ID = 10mA VDS = 10V ID = 10mA ID = 100mA VGS = 0 VDS = 0 VDS = VGS ID = 6A VDS = VGS 1 4.8 70
Typ.
Max. Unit
V 6 1 7 mA
mA
V mhos
VGS(th)match
0.1
V
TOTAL DEVICE
GPS Common Source Power Gain Drain Efficiency Load Mismatch Tolerance Input Capacitance Output Capacitance
h
PO = 300W VDS = 28V f = 175MHz IDQ = 2A
13 60 20:1 VGS = -5V f = 1MHz VGS = 0 VGS = 0 f = 1MHz f = 1MHz 360 180 15
dB % -- pF pF pF
VSWR Ciss Coss Crss
PER SIDE
VDS = 28V VDS = 28V
Reverse Transfer Capacitance VDS = 28V
* Pulse Test:
Pulse Duration = 300 ms , Duty Cycle 2%
HAZARDOUS MATERIAL WARNING
The ceramic portion of the device between leads and metal flange is beryllium oxide. Beryllium oxide dust is highly toxic and care must be taken during handling and mounting to avoid damage to this area. THESE DEVICES MUST NEVER BE THROWN AWAY WITH GENERAL INDUSTRIAL OR DOMESTIC WASTE.
THERMAL DATA
RTHj-case Thermal Resistance Junction - Case Max. 0.4C / W
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01/01
D1028UK
400 350 300 250
P out
100 90 80 70
Drain Efficiency
400 350 300 250
P out
f = 175MHz Idq = 2A Vds = 28V
20
18
Gain
200
W
60
%
200
W
16
dB
150
f = 175MHz
50
Idq = 2A Vds = 28V
150 100 50 0 0 2 4 6 8 10
P in W
Pout Gain
100 50 0 0 2 4 6 8 10
P in W
Pout Drain Efficiency
40 30 18 20 20
14
12
14
16
12
14
16
18
12 20
2nd harmonic = -28dBc 3rd harmonic = -40dBc output at 350W
Figure 1 - Power Output and Efficiency vs. Power Input.
Figure 2 - Power Output & Gain vs. Power Input.
400 350 300 250
P out
100 90 80 70
Drain Efficiency IMD dBc
-20
18.5
-30
17.5
Gain dB
200
W
60
%
150 100 50 0 0 2 4 6 8 10
P in W
Pout Drain Efficiency
50 40 30 12 14 16 18 20 20
-40
16.5
-50
0
0.5
IMD3 IMD5 Gain
1
Idq A
1.5
2
15.5 2.5
f1 = 175.0 MHz f2 = 175.1 MHz VDS = 28V
f1 = 175.0MHz f2 = 175.1MHz Pout = 130W PEP Vds = 28V
Figure 3 - IMD vs. Output Power.
Figure 4 - IMD & Gain vs. Idq
Semelab plc.
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01/01
D1028UK
Typical S Parameters
! #
!Freq !MHz 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320 330 340 350 360 370 380 390 400 410 420 430 440 450 460 470 480 490 500
VDS = 28V, IDQ = 1A per side S MA R 50 MHZ
S11 mag 0.828 0.836 0.846 0.854 0.867 0.873 0.886 0.896 0.904 0.91 0.92 0.927 0.931 0.934 0.941 0.942 0.951 0.95 0.958 0.958 0.96 0.963 0.965 0.968 0.967 0.969 0.97 0.971 0.972 0.974 0.974 0.978 0.979 0.979 0.978 0.978 0.98 0.983 0.984 0.985 0.981 0.977 0.981 0.981 0.985 0.985 0.986 0.982 0.982 ang -161.3 -165.9 -168.2 -169.2 -170.2 -171.2 -171.4 -172.4 -173.0 -173.2 -173.6 -174.1 -174.5 -175.3 -175.2 -175.9 -175.8 -176.4 -177.2 -177.2 -178.2 -178.0 -178.7 -178.7 -179.0 -179.8 -179.4 -179.3 179.8 179.8 179.3 179.1 178.8 178.8 178.2 178.5 177.9 178.1 177.6 177.2 177.1 176.8 176.4 176.2 176.2 176.1 175.2 175.4 175.4 S21 mag 19.78 13.83 10.27 8.126 6.259 5.331 4.554 3.883 3.362 3.013 2.558 2.259 2.012 1.85 1.652 1.475 1.306 1.215 1.094 1.014 0.938 0.897 0.806 0.738 0.692 0.662 0.618 0.581 0.557 0.539 0.505 0.472 0.445 0.419 0.379 0.353 0.343 0.321 0.3 0.304 0.299 0.284 0.264 0.245 0.237 0.226 0.209 0.205 0.194 ang 103.2 91.0 82.9 75.9 68.5 64.3 59.5 54.9 50.6 48.6 44.3 41.2 38.1 35.9 32.9 30.5 28.6 28.2 27.4 25.5 24.4 22.7 20.3 18.1 17.4 17.0 16.5 16.7 16.0 14.2 11.8 9.7 7.5 6.1 5.3 4.9 4.6 4.4 7.7 7.9 4.7 2.2 0.3 -0.9 -0.8 -0.9 -0.7 0.2 -1.3 S12 mag 0.013 0.013 0.012 0.012 0.011 0.01 0.009 0.009 0.008 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.004 0.004 0.004 0.005 0.005 0.005 0.006 0.006 0.007 0.007 0.007 0.008 0.011 0.011 0.012 0.012 0.012 0.013 0.013 0.013 0.014 0.014 0.014 0.015 0.015 0.015 0.016 0.016 0.017 0.02 0.022 0.022 0.021 ang 16.4 5.8 -0.3 -5.2 -9.0 -11.1 -12.8 -13.9 -14.3 -13 -10.7 -7.6 -3.4 1.7 8.6 17.5 27.6 36.0 46.6 56.5 60.9 64.8 67.6 68.9 71.7 74.8 78.9 88.3 87.4 83.3 80.1 78.9 78.6 78.4 78.7 79.6 78.9 77.9 82.1 83.8 82.5 82.1 84.2 86.8 93.2 91.8 85.2 82.4 80.8 S22 mag 0.644 0.662 0.687 0.708 0.729 0.754 0.78 0.802 0.813 0.832 0.851 0.861 0.871 0.884 0.892 0.901 0.909 0.913 0.923 0.926 0.934 0.936 0.939 0.945 0.948 0.952 0.955 0.959 0.958 0.963 0.963 0.967 0.967 0.971 0.968 0.973 0.976 0.972 0.975 0.977 0.978 0.977 0.982 0.98 0.98 0.984 0.98 0.984 0.983 ang -156.3 -160.3 -161.2 -162.2 -162.6 -163.3 -163.5 -163.9 -164.8 -165.4 -166.4 -166.6 -167.3 -168.0 -168.8 -169.5 -169.5 -170.2 -170.7 -171.3 -172.1 -172.0 -172.7 -173.1 -173.8 -173.8 -174.1 -174.3 -174.7 -174.8 -175.3 -176.3 -176.5 -176.6 -177.0 -177.4 -177.2 -178.0 -177.8 -178.1 -178.3 -178.7 -178.9 -179.6 -179.5 -179.5 -179.9 179.9 -180.0
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01/01
D1028UK
L2
Gate-Bias
100 n 1n
10k 1n L1 T2 D1028UK 12
100n 1000u 1n T4
28V
820K
100k
680pF T6 1u T1 90p F 2-18 pF 47pF 2-18 pF
680pF 1u T5 T3 D1028UK
D1028UK 175MHz TEST FIXTURE
T1,2,3 T4,5 T6 L1 L2
7cm Storm Products EXE18 19/30 S1TW coaxial cable on Siemens A1 x 1 2-hole core. 14cm Storm Products EXE18 19/30 S1TW coaxial cable. 11cm Storm Products EXE18 19/30 S1TW coaxial cable 6 turns 1.2mm dia wire, 5mm internal diameter 1.5 turns 0.9mm dia wire on Siemens A1 x 1 2 hole core
Semelab plc.
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01/01
D1028UK
110
0 12
0 13 14 0
100
90
80
70
60
50 40
15 0
30
0
180 5 2 10 0.5 0.2
160
20
170
10
0.2
180
10
1
2
5
0
0.5
0
175 225
-170
ZLopt
-10
-160
-20
0 -15
-30
Impedance measured Drain - Drain
40 -1 -4 0 0 -5 -1 30
Matching Network
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-80
-90
-100
R 4 4.5 3.5
jX -0.5 -4 -5
-70
-110
f MHz 175 200 225
ZL
-60
-12 0
Z Lopt
01/01
D1028UK
110
0 12
0 13 14 0
100
90
80
70
60
50 40
15 0
30
0
180 5 2 10 0.5 0.2
160
20
170
10
0.2
180
0 175
0.5
10
1
2
5
0
200
-170
225
ZSopt
-10
-160
-20
Matching Network
0 -15
-30
40 -1
Impedance measured Gate - Gate
-4 0 0 -5 -1 30
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-60
-70
-80
-90
-100
-110
-12 0
ZS opt
f MHz 175 200 225
Zs R 1.6 1.6 2.3 jX -1.5 -1.2 -2
01/01

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