88-565676-02R Amphenol, 88-565676-02R Datasheet - Page 285
88-565676-02R
Manufacturer Part Number
88-565676-02R
Description
LJT 39C 38#22D 1#8(COAX) PIN
Manufacturer
Amphenol
Series
LJT Seriesr
Datasheet
1.M3902932-260.pdf
(436 pages)
Specifications of 88-565676-02R
Mil Type
MIL-DTL-38999 I
Product Type
Connectors
Contact Style
Pin (Male)
Shell Style
Receptacle
Shell Size
16
Number Of Contacts
2
Insert Arrangement
16-2
Termination Style
Crimp
Shell Plating
Cadmium over Nickel
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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The following formula and example are offered in order to
determine the expected filter performance in an impedance
system other than 50 ohms.
With the attenuation expressed in 50 ohms and the transfer
impedance curve shown in Figure 1 below, a designer can relate
the expressed attenuation to the input and output impedance of
his circuit.
Example:
Formula (Taken from Figure 1):
Amphenol
(1)
(2)
(3)
1.4 x 10 ohm = transfer impedance
for 65 dB in a 50 ohm system
140
120
100
80
60
40
20
10
0
Noise is 40dB above specification level at 100 MHz
Input and output impedance are 10 and 100 ohms
respectively
Amphenol
attenuation at 100 MHz and +25°C
-4
Aerospace
®
VHF 7000 pf filter has a 65 dB minimum
10
Attenuation vs Transfer Impedance in 50 Ohm System
-3
Impedance Matching Formula
(Your System to a 50 Ohm System)
Transfer Impedance - Z
10
-2
Figure 1
Atten (dB) = 20 log
Atten = filter performance in a system other than 50 ohms
Atten (dB) = 20 log
Attenuation = 56.3dB
In this case, the 7000 pf VHF filter will give 56.3 dB which is
16.3dB below the desired reduction in noise (40dB) as stated
in the above problem.
Z
Z
Z
S
L
12
= source impedance
= load impedance
10
= transfer impedance
12
-1
Ohms
10
10
1 +
1 +
10
1.4 x 10
Z
-0
12
(Z
Z
S
S
Z
10(100)
+ Z
L
–2
(10 + 100)
L
)
10
1
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