HMC787A Data Sheet
Rev. A | Page 12 of 17
ISOLATION AND RETURN LOSS PERFORMANCE
Data taken as downconverter, lower sideband (high-side LO), IF = 100 MHz, T
A
= 25°C, and LO drive level = 17 dBm, unless otherwise
noted. Measurements taken with LO amplifier in line with lab bench LO source.
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ISOLATION (dB)
RF FREQUENCY (GHz)
80
70
30
50
60
10
20
40
0
+85°C
+25°C
–40°C
13608-042
LO TO RF
LO TO IF
Figure 42. LO to RF and LO to IF Isolation vs. RF Frequency for Various
Temperatures, LO Power = 17 dBm
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ISOLATION (dB)
RF FREQUENCY (GHz)
80
70
30
50
60
10
20
40
0
+85°C
+25°C
–40°C
13608-043
Figure 43. RF to IF Isolation vs. RF Frequency for Various Temperatures,
LO Frequency = 7000 MHz, LO Power = 17 dBm
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LO RETURN LOSS (dB)
LO FREQUENCY (GHz)
10
5
–15
–5
0
–25
–20
–10
–30
+85°C
+25°C
–40°C
13608-044
Figure 44. LO Return Loss vs. LO Frequency at Various Temperatures,
LO Power = 17 dBm
3 11
10987
654
ISOLATION (dB)
RF FREQUENCY (GHz)
80
70
30
50
60
10
20
40
0
19dBm
17dBm
15dBm
13608-045
LO TO RF
LO TO IF
Figure 45. LO to RF and LO to IF Isolation vs. RF Frequency for Various LO
Powers, Temperature = 25°C
3 1110987654
ISOLATION (dB)
RF FREQUENCY (GHz)
80
70
30
50
60
10
20
40
0
15dBm
17dBm
19dBm
13608-046
Figure 46. RF to IF Isolation vs. RF Frequency for Various LO Powers,
Temperature = 25°C, LO Frequency = 7000 MHz
0 16151413951 1062 1173 1284
RETURN LOSS (dB)
IF FREQUENCY (GHz)
5
–15
–5
0
–25
–35
–20
–10
–40
–30
+85°C
+25°C
–40°C
13608-047
Figure 47. IF Return Loss vs. IF Frequency at Various Temperatures,
LO Power = 17 dBm, LO Frequency = 6 GHz