Why ? -Testing any 10 GHz post amplifiers well matched for the DB6NT output. - Building easily the P1dBc curve of any 10 GHz post amplifier requiring 200 mW ...
Target - Internal view - Scalar broadband measurements - Pout versus Pin measurements à 10.37 GHz - Noise/gain measures (for the fun) - Linear buffer following an HP 8350 sweep, for 10 GHz 200 mW amplifier measurements with Pin about 200 mW (as 2 meter TRx + DB6NT transverter alternative)
F5DQK July 2009
DEM 3-3PA
2
Internal view RF in
PTT
+12V DC
RF out
F5DQK July 2009
DEM 3-3PA
3
Zoom on Rf output
F5DQK July 2009
DEM 3-3PA
4
Scalar linear broadband curve
F5DQK July 2009
DEM 3-3PA
5
Direct output power measurement 40
DEM 10 GHz 3W amp : Pout versus Pin
38
U=12V Irepos=1.9A
Psat= +35.1 dBm or 3W
36
34
P1dBc= +34 dBm or 2.5W
Pout (dBm)
32
30
28
Gli
n
9.2 2 =
dB
Pout réelle (dBm)
26
24
22
20 -5
-3
-1
1
3
5
7
9
11
13
15
Pin (dBm)
F5DQK July 2009
DEM 3-3PA
6
Gain/Nf measurements (for the fun)
30 db 25 db
4 db 2 db
F5DQK July 2009
DEM 3-3PA
7
Buffer for HP 8350 sweep Why ? -Testing any 10 GHz post amplifiers well matched for the DB6NT output - Building easily the P1dBc curve of any 10 GHz post amplifier requiring 200 mW input, (impossible with only the normal transverter + 144 or 432 MHz rig)
- The HP 8350b + HP 83590a RF plugin is only able to give +17 dBm max leveled power - Power of a DB6NT transverter à 10 GHz only restricted to +23 dBm max output
â40.2. 0.010. â12.5. 14.8. 5.5069. 142.3. â13.5. 0.211. â106.2. 14.5. â13.9 .... WaferâProbed. Measurements. O utpu t R eturn Loss (dB. ) 50. 0. 10. 20. S m all-S.
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