10-503140-032 Datasheet, PDF (284/437 Pages) Amphenol Corporation – The Interconnection Leader

Effect of Temperature on EMI Filter
Attenuation
Amphenol
Aerospace
Note: Below are typical capacitance values. Other capacitance values are available from 5pf to 400 NF in one
capacitor element. Please consult factory for part numbers.
TYPICAL INSERTION LOSS
MF-1
VHF-1
UHF-2
HF-1
VHF-2
UHF-1
100
80
All performance between
1000 and 10,000 is
60
greater than 60 dB.
Measurements were
greater than equipment
sensitivity (60 dB).
40
20
0
.15
.5
1
3
10
30
100
300
1000
FREQUENCY MHz
TYPICAL INSERTION LOSS (dB)
PER MIL-STD-220, 5 ADC, 25°C
Capacitance 1MHz 3MHz 10MHz 30MHz 100MHz 300MHz 1000MHz
375 pf UHF₁ 0
0
1
8
16
–
–
750 pf UHF₂ 0
0
3
10
19
–
–
2500 pf VHF₂ 0
2
8
20
28
–
–
7000 pf VHF₁ 5
9
17
23
40
–
–
16000 pf HF₁ 6 14 20
24
80
–
–
Most filter attenuation curves and capacitance values are
expressed at 25°C. However, temperature can affect the
capacit­ance of a titanate filter element, affecting the insertion
loss that the element will cause.
In order to assist the user in anticipating the effect of various
temp­ eratures, the following charts applicable to Amphenol^®
filter conn­ ectors utilizing MF-1, HF-1, VHF-1, VHF-2, UHF-1
and UHF-2 filters are provided. Please note that all insertion
loss (attenuation) values given were measured with no load
applied. The band designations refer to MIL-STD-2120.
MF-1*
Typical Capacitance = 1,000,000 pf  Min. 800,000 pf  Max. 1,600,000 pf
Type Pi
Temp. FCO 1MHz 3MHz 10MHz 30MHz 100MHz 300MHz 1000MHz
–55°C – 18 –
64
80
80
80
80
Room 7.94K 55 –
80
80
80
80
80
+125°C – 22 –
70
80
80
80
80
VHF-2
Typical Capacitance = 2,500 pf  Min. 1,900 pf  Max. 4,000 pf
Band E, Type Pi
Temp. FCO 1MHz 3MHz 10MHz 30MHz 100MHz 300MHz 1000MHz
–55°C –
0
2
7
17
40
58
71
Room 3.3M 0
2
8
24
46
61
71
+125°C –
0
3 10 26
46
63
69
HF-1*
Typical Capacitance = 16,000 pf  Min. 9,800 pf  Max. 24,000 pf
Type Cascaded Pi
Temp. FCO 1MHz 3MHz 15MHz 50MHz 100MHz 300MHz 1000MHz
–55°C –
2
6
24
62
80
80
80
Room 648K 3
9
50
80
80
80
80
+125°C –
0
6
30
62
80
80
80
UHF-2
Typical Capacitance = 750 pf  Min. 500 pf  Max. 1,100 pf
Band C, Type Pi
Temp. FCO 1MHz 3MHz 10MHz 30MHz 100MHz 300MHz 1000MHz
–55°C –
0
0
3
9
25
46
61
Room 12.7M 0
0
3
10
28
46
61
+125°C –
0
0
3
10
24
42
60
VHF-1
Typical Capacitance = 7,000 pf  Min. 4,900 pf  Max. 12,000 pf
Band G, Type Pi
Temp. FCO 1MHz 3MHz 10MHz 30MHz 100MHz 300MHz 1000MHz
–55°C –
12
8
21
44
61
65
Room 1.27M 1 6 18 42
62
72
75
+125°C –
02
9
24
45
62
64
Note: F_CO = Cut-off Frequency
* Consult Amphenol, Sidney, NY for availability.
UHF-1
Typical Capacitance = 375 pf  Min. 290 pf  Max. 450 pf
Band B, Type Pi
Temp. FCO 1MHz 3MHz 10MHz 30MHz 100MHz 300MHz 1000MHz
–55°C –
0
0
1
6
21
43
58
Room 21.9M 0
0
1
8
18
42
56
+125°C –
0
0
1
8
17
38
50
Contact Amphenol Aerospace for more information at 800-678-0141 • www.amphenol-aerospace.com 283