north w5hn texas 902 mhz presentations - qsl. · pdf file• paralleling high power 900 mhz...
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902 MHz Presentations
• Getting Started on 902 MHz at W5LUA• Paralleling high power 900 MHz amplifiers by W5LUA• Review of the W1GHz 902 MHz transverter by N5AC• 902 MHz Transverter at KA5BOU• 902 MHz Transverter at NM5M• 902 MHz Transverter at WB5ZDP• 902 MHz W0PW Dual Dipole Feed by WW2R• 902 MHz EME at WA8RJF EN91• DEMI 902 MHz Transverter demo by W5SXD
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The 33 cm Band
• 902 to 928 MHz• Weak signal work at 902.0 to 902.5 MHz and at 903 to
903.5 MHz east of the Mississippi River• Weak signal calling frequency for us is 902.1 MHz• Shared with Part 15 and ISM on a non-interfering basis -
Bull• No commercial store bought radios available for SSB
and CW• Build or buy a transverter to go with your multimode 2M
radio or HF transceiver• Antennas – both loop yagis and standard yagi design
available including some pretty simple antennas by KentWA5VJB
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WB5LUA 902 MHz Transverter
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758 MHz LO
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758 MHz LO Parts List
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WB5LUA 902 MHz Transverter
Built 1987
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WB5LUA 902 MHz Transverter
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Band Pass Filters for 902 MHz
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Components for 902 MHz
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N5QGH 902 MHz Transverterusing old KK7B no tune transverter
Approach
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W5LUA 902 MHz ATF-36077 LNA
Reference AvagoAp Note 1128
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WW2R 902 MHz Transverter
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902 MHz PA Module
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DEMI 902 MHz Transverter
DEMI Demo by W5SXD
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NM5M’s 902 MHz XVTR
51 MHz
460 MHzSAW Filter
Pass 1.8-1.9 GHz
MAR (?)
2:1Divider
902 MHzSAW
FILTERLNA
25 dB Gain
445 MHz IF INTX
445 MHz IFOUT RX
+12 dBm
902 AMMO CAN TRANSVERTER
INA 10386MMIC AMP
902 MHzSAW
FILTER
SBL 1XMini Circuits
SBL 1XMini Circuits
ERA 3
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NM5M’s 902 MHz XVTR
TTL OSCTIMES9 MULT
460 MHz SAWFILTER
TX MIXER
902 MHzFILTER
LNA
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NM5M’s 902 MHz XVTR
LNA
MIXER IF AMP
IF SWITCH
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WB5ZDP 902 MHz Transverter
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W1GHZ 902 MHz Transverter
• Inexpensive 2 board approach providinglow power and moderate NF
• http://www.w1ghz.org/MBT/902_MHz_Transverter_for_the_Multiband_Rover.pdf
• Group Buy?
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150 Watt Motorola SSPAModel STF2520A
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300 Watt Motorola SSPAModel SGTF 1038A
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1 Watt Low Level LevelingAmplifier Model STF 2540A
This unit is the same form factor as the 150 watt and 300 watts SSPAs – Buyer be aware!
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Motorola 150 W and 300 WSSPAs
• www.vhfsouth.com modifications perKD5FZX on both 150W and 300W SSPAs
• Article by N5AC
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W5LUA Pair 300W SSPA
50 Amp meters and shunts available from www.allelectronics.com$12 / meter and $12 / shunt
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Back View SSPA
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Close-Up Power Dividers
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Paralleling two 300 Watt SSPAs atWA8RJF using 90 Degree Hybrid
Couplers
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Showing Method of Attachmentof 24V and PTT at WA8RJF
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SMA 90 Degree Hybrid Couplers
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Anaren 10014-3 .5 to 1 GHz3dB 90o Hybrid
0.6 0.7 0.8 0.9 1.0 1.1 1.20.5 1.3
-3
-8
0
freq, GHz
dB(S
(2,1
))
m2
dB(S
(4,3
))
m1
m1freq=dB(S(4,3))=-3.078
900.0MHzm2freq=dB(S(2,1))=-3.284
900.0MHz
0.6 0.7 0.8 0.9 1.0 1.1 1.20.5 1.3
-17.0
-16.5
-16.0
-15.5
-15.0
-17.5
-14.5
freq, GHz
dB(S
(6,5
))
m3
m3freq=dB(S(6,5))=-17.104
900.0MHz
0.6 0.8 1.0 1.2 1.40.4 1.6
-100
0
100
-200
200
freq, GHz
phas
e(S
(2,1
))
m5
phas
e(S
(4,3
))
m4
m4freq=phase(S(4,3))=160.120
900.0MHzm5freq=phase(S(2,1))=-109.070
900.0MHzPort 2-109o
Port 3160.1o
Port 4
Port 3Port 2
1
4 3
2
Difference = 160.1--109=269.1 – 360 =-90.9
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MECA 900 MHz 3dB 90o Hybrid
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MECA 900 MHz 3dB 90o Hybrid
0.6 0.7 0.8 0.9 1.0 1.1 1.20.5 1.3
-6
-4
-2
-8
0
freq, GHz
dB(S
(2,1
))
m2
dB(S
(4,3
))
m1
m1freq=dB(S(4,3))=-3.024
900.0MHzm2freq=dB(S(2,1))=-3.133
900.0MHz
0.6 0.7 0.8 0.9 1.0 1.1 1.20.5 1.3
-17.0
-16.5
-16.0
-15.5
-15.0
-17.5
-14.5
freq, GHz
dB
(S(6
,5))
m3
m3freq=dB(S(6,5))=-17.104
900.0MHz
0.6 0.8 1.0 1.2 1.40.4 1.6
-100
0
100
-200
200
freq, GHz
pha
se(S
(2,1
)) m5
pha
se(S
(4,3
))
m4
m4freq=phase(S(4,3))=127.700
900.0MHzm5freq=phase(S(2,1))=36.733
900.0MHz
Port 2 Port 3
2
3
1
4
Port 4
Input
Port 3127.7o
Port 236.7o Difference = 127.7-36.7=91o
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ADS Coupler Simulation
SSUBSSub1
TanD=0Cond=1.0E+50T=31 milB=500 milMur=1Er=1
SSub
S_ParamSP1
Step=0.01 GHzStop=1.5 GHzStart=0.5 GHz
S-PARAMETERS
TermTerm2
Z=50 OhmNum=2
TermTerm3
Z=50 OhmNum=3
TermTerm4
Z=50 OhmNum=4
SBCLINCLin2
L=3310 milS=37 milW=180 milSubst="SSub1"
TermTerm1
Z=50 OhmNum=1
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MECA 900 MHz 3dB 90o HybridADS Simulation
Directivity = Isolation – Coupling =16.7dB – 3.2dB = 13.5dB not toospectacular but may not be tooimportant since we are not trying toaccurately measure return loss butrather just combine amplifiers
Coupled port leads by 90 degreesOr direct port lags by 90 degrees
Direct Port
Coupled Port
m2freq=dB(S(4,1))=-16.718
900.0MHz
m1freq=dB(S(3,1))=-3.208
900.0MHzm5freq=dB(S(2,1))=-3.191
900.0MHz
0.7 0.9 1.1 1.30.5 1.5
-15
-10
-5
-20
0
freq, GHz
dB(S
(4,1
))
m2dB(S
(2,1
))
m5
dB(S
(3,1
))
m1
m2freq=dB(S(4,1))=-16.718
900.0MHz
m1freq=dB(S(3,1))=-3.208
900.0MHzm5freq=dB(S(2,1))=-3.191
900.0MHzm4freq=phase(S(3,1))=-0.571
900.0MHzm3freq=phase(S(2,1))=-90.624
900.0MHz
0.6 0.8 1.0 1.2 1.40.4 1.6
-100
-50
0
-150
50
freq, GHz
phas
e(S
(3,1
))
m4
phas
e(S
(2,1
))
m3
m4freq=phase(S(3,1))=-0.571
900.0MHzm3freq=phase(S(2,1))=-90.624
900.0MHz
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Broad band Response of theIdeal 90 Degree Hybrid
Amplitude response repeats at 3fo, 5fo, 7fo, etc.Phase difference remains constant at 90 degrees regardless of frequency!In reality discontinuities and parasitics can create imbalances
Also known as a “Backward Wave” Coupler
m2freq=dB(S(4,1))=-16.718
900.0MHz
m1freq=dB(S(3,1))=-3.208
900.0MHzm5freq=dB(S(2,1))=-3.191
900.0MHz
1 2 3 4 5 60 7
-60
-40
-20
-80
0
freq, GHz
dB(S
(4,1
))
m2
dB(S
(2,1
))
m5
dB(S
(3,1
))
m1
m2freq=dB(S(4,1))=-16.718
900.0MHz
m1freq=dB(S(3,1))=-3.208
900.0MHzm5freq=dB(S(2,1))=-3.191
900.0MHz
m4freq=phase(S(3,1))=-0.571
900.0MHzm3freq=phase(S(2,1))=-90.624
900.0MHz
1 2 3 4 5 60 7
-100
0
100
-200
200
freq, GHz
phas
e(S
(3,1
))
m4
phas
e(S
(2,1
))
m3
m4freq=phase(S(3,1))=-0.571
900.0MHzm3freq=phase(S(2,1))=-90.624
900.0MHz
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Cascade of 2 couplers
0.7 0 .9 1 .1 1 .30 .5 1 .5
-60
-40
-20
-80
0
freq, G H z
dB(S
(4,1
)) m 2
dB(S
(2,1
))
m 5
dB(S
(3,1
))
m 1
m 2freq=dB(S(4 ,1 ))= -38 .510
900 .0M H z
m 1freq=dB(S(3 ,1 ))= -28 .191
900 .0M H zm 5freq=dB(S(2 ,1 ))= -0 .393
900 .0M H z
TermTerm2
Z=50 OhmNum=2
TermTerm3
Z=50 OhmNum=3
TermTerm4
Z=50 OhmNum=4
SBCLINCLin3
L=3310 milS=37 milW=180 milSubst="SSub1"
SBCLINCLin2
L=3310 milS=37 milW=180 milSubst="SSub1"
TermTerm1
Z=50 OhmNum=1
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Cascade of 2 couplers with OpenCircuit on one Port1
Through Loss = 6.5 dBPower at isolated portdown only 6.5 dB,need 50 ohm load thatcan handle this at leasttemporarilly. Inaddition some power isalso available at the“other” output port ofthe coupler – none ofthis is very good!
0.7 0.9 1.1 1.30.5 1.5
-8
-6
-4
-2
-10
0
freq, GHz
dB(S
(4,1
))
m2
dB(S
(2,1
))
m5
dB(S
(3,1
))
m1
m2freq=dB(S(4,1))=-6.522
900.0MHz
m1freq=dB(S(3,1))=-9.502
900.0MHzm5freq=dB(S(2,1))=-6.522
900.0MHz
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Cascade of 2 couplers with 1 and3 dB attenuators in one path
0.7 0.9 1.1 1.30.5 1.5
-30
-20
-10
-40
0
freq, GHz
dB(S
(4,1
))
m2
dB(S
(2,1
))
m5
dB(S
(3,1
)) m1
m2freq=dB(S(4,1))=-27.219
900.0MHz
m1freq=dB(S(3,1))=-18.343
900.0MHzm5freq=dB(S(2,1))=-1.741
900.0MHz
0.7 0.9 1.1 1.30.5 1.5
-40
-30
-20
-10
-50
0
freq, GHz
dB
(S(4
,1))
m2
dB
(S(2
,1))
m5
dB
(S(3
,1))
m1
m2freq=dB(S(4,1))=-32.051
900.0MHz
m1freq=dB(S(3,1))=-33.422
900.0MHzm5freq=dB(S(2,1))=-0.873
900.0MHz
1 dB 3 dB
AttenuatorATTEN1
VSWR=1Loss=1dB
SBCLINCLin3
L=3310milS=37milW=180milSubst="SSub1"
TermTerm2
Z=50OhmNum=2
TermTerm3
Z=50OhmNum=3
TermTerm4
Z=50OhmNum=4
SBCLINCLin2
L=3310milS=37milW=180milSubst="SSub1"
TermTerm1
Z=50OhmNum=1
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Cascade of 2 couplers with 10 and45 degree offset in one path
0.7 0.9 1.1 1.30.5 1.5
-30
-20
-10
-40
0
freq, GHz
dB(S
(4,1
))
m2dB(S
(2,1
))
m5
dB(S
(3,1
)) m1
m2freq=dB(S(4,1))=-31.472
900.0MHz
m1freq=dB(S(3,1))=-19.919
900.0MHzm5freq=dB(S(2,1))=-0.429
900.0MHz
10 degree offset
0.7 0.9 1.1 1.30.5 1.5
-30
-20
-10
-40
0
freq, GHz
dB(S
(4,1
))
m2
dB(S
(2,1
))
m5
dB(S
(3,1
))
m1
m2freq=dB(S(4,1))=-20.145
900.0MHz
m1freq=dB(S(3,1))=-7.941
900.0MHzm5freq=dB(S(2,1))=-1.137
900.0MHz
45 degree offset
TLINTL5
F=.9GHzE=45Z=50.0Ohm
SBCLINCLin3
L=3310milS=37milW=180milSubst="SSub1"
TermTerm2
Z=50OhmNum=2
TermTerm3
Z=50OhmNum=3
TermTerm4
Z=50OhmNum=4
SBCLINCLin2
L=3310milS=37milW=180milSubst="SSub1"
TermTerm1
Z=50OhmNum=1
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Single coupler with both outputsopen circuited
All power is reflectedback to port 4.Termination on port 4must be capable ofhanding the entireavailable driver power.
0.6 0.8 1.0 1.2 1.40.4 1.6
-12
-10
-8
-6
-4
-2
-14
0
freq, GHz
dB(S
(4,1
))
m2
m2freq=dB(S(4,1))=-0.597
900.0MHz
SBCLINCLin2
L=3310milS=137milW=180milSubst="SSub1"
TermTerm4
Z=50OhmNum=4
TermTerm1
Z=50OhmNum=1
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Optimizing Power Output
Best solution is to adjustamplitude and phase to keepcurrent drawn by each ampas equal as possible whenamps are driven to full power
Try flipping hybrids
Add some line length
Adjust load on output couplerisolated port
Each amp has some form ofadjustable attenuator on itsinput
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W0PW EIA Dual Dipole Feed
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W0PW EIA Dual Dipole Feed
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902 MHz W0PW EIA Dual DipoleFeed @ W5LUA
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WA8RJF 3M Dish on 902 MHz
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Dual Dipole Feed for 902 MHzBuilt by WW2R
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Side View of Dual Dipole Feed
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Return Loss of 902 MHz DualDipole Feed
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WW2R 3M Dish on 902 MHz
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902 MHz Feed at WW2R
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Waterproofing Feed at WW2R
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Summary
• Questions?• Group buys?