HMC525ALC4 Data Sheet
Rev. A | Page 20 of 28
ISOLATION AND RETURN LOSS
Downconverter performance at IF = 100 MHz, upper sideband (low-side LO).
0
10
30
50
70
20
40
60
3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0
8.5 9.0
LO TO RF ISOLATION (dB)
RF FREQUENCY (GHz)
T
A
= –40°C
T
A
= +25°C
T
A
= +85°C
16401-088
Figure 80. LO to RF Isolation vs. RF Frequency at Various Temperatures,
LO = 15 dBm
0
10
30
50
70
20
40
60
3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0
8.5 9.0
LO TO IF ISOLATION (dB)
RF FREQUENCY (GHz)
LO TO IF1,T
A
= –40°C
LO TO IF1,T
A
= +25°C
LO TO IF1,T
A
= +85°C
LO TO IF2,T
A
= –40°C
LO TO IF2,T
A
= +25°C
LO TO IF2,T
A
= +85°C
16401-089
Figure 81. LO to IF Isolation vs. RF Frequency at Various Temperatures,
LO = 15 dBm
0
10
30
50
70
20
40
60
3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0
RF TO IF ISOLATION (dB)
RF FREQUENCY (GHz)
RF TO IF1, T
A
= –40°C
RF TO IF1, T
A
= +25°C
RF TO IF1, T
A
= +85°C
RF TO IF2, T
A
= –40°C
RF TO IF2, T
A
= +25°C
RF TO IF2, T
A
= +85°C
16401-090
Figure 82. RF to IF Isolation vs. RF Frequency at Various Temperatures,
LO = 15 dBm
0
10
30
50
70
20
40
60
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0 7.5
8.0 8.5 9.0
LO TO RF ISOLATION (dB)
RF FREQUENCY (GHz)
LO = 13dBm
LO = 15dBm
LO = 17dBm
LO = 19dBm
16401-091
Figure 83. LO to RF Isolation vs. RF Frequency at Various LO Power levels,
T
A
= 25°C
0
10
30
50
70
20
40
60
3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0
LO TO IF ISOLATION (dB)
RF FREQUENCY (GHz)
LO TO IF1, 13dBm
LO TO IF1, 15dBm
LO TO IF1, 17dBm
LO TO IF1, 19dBm
LO TO IF2, 13dBm
LO TO IF2, 15dBm
LO TO IF2, 17dBm
LO TO IF1, 19dBm
16401-092
Figure 84. LO to IF Isolation vs. RF Frequency at Various LO Power Levels,
T
A
= 25°C
0
10
30
50
70
20
40
60
3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0
RF TO IF ISOLATION (dB)
RF FREQUENCY (GHz)
RF TO IF1, 13dBm
RF TO IF1, 15dBm
RF TO IF1, 17dBm
RF TO IF1, 19dBm
RF TO IF2, 13dBm
RF TO IF2, 15dBm
RF TO IF2, 17dBm
RF TO IF1, 19dBm
16401-093
Figure 85. RF to IF Isolation vs. RF Frequency at Various LO Power Levels,
T
A
= 25°C
