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Millimeter-wave subsystems
Also available for extending the frequency coverage
of the 85301B system are millimeter-wave subsys-
tems, which provide millimeter expansion capability
for the standard 85301B system.
The Agilent 85325A millimeter-wave interface kits use
83550 series millimeter-wave source modules,
which provide signals from 26.5 to 110 GHz in
standard waveguide bands. The millimeter-wave
source modules multiply an 11 to 20 GHz signal by
either 3, 5 or 7 to produce the desired output fre-
quency. The source modules require a high-power
11 to 20 GHz signal for proper operation.
RF source requirements
The 83623B and 83624B synthesizer sweepers have
adequate output power to drive the source mod-
ules directly. All other synthesizers require an
8349B microwave amplifier to provide proper RF
drive power to the millimeter-wave source modules.
Table 13. Summary of 83550 series millimeter-wave
source modules
Source Module
Model Number
Band
83554A
R
83555A
Q
33556A
U
83557A
V
33558A
W
Table 14. Millimeter-wave system performance
Characteristic
Sensitivity
1
(dBm) (No avg)
Sensitivity
1
(dBm) (128 avg)
Compression level (dBm)
Dynamic range (dB) (No avg)
Channel isolation (dB)
Typical RF input return loss
2
(dB)
1. Sensitivity is shown where signal = noise.
2. At the input of test and reference isolators. Typical RF input return loss of 11970 mixers is 8.5 dB.
3. Maximum cable lengths with special high-powered 85309A-H30, H31, H32 units.
4. Typical performance values are in parenthesis.
Frequency Range
Output Power
(GHz)
(dBm)
26.5 to 40
+7
33 to 50
+3
40 to 60
+3
50 to 75
+3
75 to 110
0
R-Band
26.5 to 40 GHz
-109
-88
-19
79
100
15.5
The Agilent 11970 series mixers used in the 85325A
millimeter-wave source modules all operate in a
harmonic mode with a 3 to 6.09 GHz LO signal.
The 11970 series mixers are weather-resistant
but not weatherproof. Use appropriate caution
in outdoor applications.
Millimeter-wave performance
Millimeter-wave performance using the 85325A
millimeter-wave interface kits is listed in Table 14.
31
Indicate in Figure 21 if millimeter-wave capa-
bility is desired for this system.
32
Indicate in Figure 21 if an 8349B microwave
amplifier is required.
Q-Band
U-Band
33 to 50 GHz
40 to 60 GHz
-106
-107
-85
-86
-24
-24
71
72
100
100
15.5
15.5
V-Band
W-Band
50 to 75 GHz
75 to 110 GHz
-99 (-103)
4
-92 (-95)
4
-78 (-82)
4
-71 (-74)
4
-18
-15
60 (68)
4
56 (62)
4
100
100
9.5
9.5
25
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