连接器的高频特性
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MOLEX confidential
All Results Renormalized to 100 W
Molex 504618/504622 Series BB Connector
0
IL
Insertion Loss (dB)
-0.5
-1
-1.5 0 5 10 15 20
Frequency (GHz)
Insertion loss is less than 1.2 dB up to 20.0 GHz, and is effectively monotonic (less than 0.1 dB deviation from monotonicity) up to at least 20.0 GHz.
MOLEX confidential
All Results Renormalized to 100 W
Molex 504618/504622 Series BB Connector
0Biblioteka Baidu
Crosstalk (dB)
NEXT
-20
FEXT
-40
-60
-80 0 5 10 15 20
Frequency (GHz)
MOLEX confidential
All Results Renormalized to 100 W
Molex 504618/504622 Series BB Connector
0
Return Loss (dB)
RL
-20
-40
-60 0 5 10 15 20
Frequency (GHz)
Return loss is less than -20.0 dB (less than 1% of input signal power is reflected) up to 5.3 GHz, and less than -10.0 dB (less than 10% of input signal power is reflected) up to 9.4 GHz.
board connector is capable of supporting data rates at least as high as 2×(20.0÷3) = 13.3 Gbps.
7
MOLEX confidential
(Plug) Connector (Receptacle) TDR Impedance (W)
105
100
Ztdr
95
90
0
100
200
300
Time (ps)
TDR impedance for a 100 ps risetime (20-80%) rectangular pulse input signal ranges from 93.7 to 101.6 W.
MOLEX confidential
Signal Integrity Results Summary and Conclusions
As shown on slide 3, the insertion loss characteristic is effectively monotonic up to at least 20.0 GHz. As defined on slide 2, Fmax = 3×(Rmax÷2), so that Rmax = 2×(Fmax÷3). Setting Fmax equal to 20.0 GHz, it thus follows that the 504618/504622 series board-to-
Jim Maroney
September, 2013
Molex Global Micro Products Division
1
This report summarizes the results of the simulation of the signal integrity characteristics for differential signaling of the Molex 504618/504622 series 0.35 mm pitch board-to-board connector. The purpose of the simulations was to determine the highest data rate that can be supported by the connector. To support a given maximum data rate Rmax, a connector should ideally have an insertion loss characteristic that is effectively monotonic at frequencies at least up to Fmax, the 3rd harmonic of half the maximum data rate Rmax, or 3×(Rmax÷2). Simulations were performed up to 20 GHz. The pin assignment for each differential signal channel was GS+SG, where S+, S-, and G denote signal plus, signal minus, and ground terminals, respectively. In the graphs that follow, all results have been renormalized to 100 W, the nominal value of differential signal channel characteristic impedance, and de-embedded to the ends of the connector terminals.
Near end crosstalk NEXT and far end crosstalk FEXT are less than -37.3 and -33.4 dB, respectively, up to 20.0 GHz.
MOLEX confidential
All Results Renormalized to 100 W Molex 504618/504622 Series BB Connector
All Results Renormalized to 100 W
Molex 504618/504622 Series BB Connector
0
IL
Insertion Loss (dB)
-0.5
-1
-1.5 0 5 10 15 20
Frequency (GHz)
Insertion loss is less than 1.2 dB up to 20.0 GHz, and is effectively monotonic (less than 0.1 dB deviation from monotonicity) up to at least 20.0 GHz.
MOLEX confidential
All Results Renormalized to 100 W
Molex 504618/504622 Series BB Connector
0Biblioteka Baidu
Crosstalk (dB)
NEXT
-20
FEXT
-40
-60
-80 0 5 10 15 20
Frequency (GHz)
MOLEX confidential
All Results Renormalized to 100 W
Molex 504618/504622 Series BB Connector
0
Return Loss (dB)
RL
-20
-40
-60 0 5 10 15 20
Frequency (GHz)
Return loss is less than -20.0 dB (less than 1% of input signal power is reflected) up to 5.3 GHz, and less than -10.0 dB (less than 10% of input signal power is reflected) up to 9.4 GHz.
board connector is capable of supporting data rates at least as high as 2×(20.0÷3) = 13.3 Gbps.
7
MOLEX confidential
(Plug) Connector (Receptacle) TDR Impedance (W)
105
100
Ztdr
95
90
0
100
200
300
Time (ps)
TDR impedance for a 100 ps risetime (20-80%) rectangular pulse input signal ranges from 93.7 to 101.6 W.
MOLEX confidential
Signal Integrity Results Summary and Conclusions
As shown on slide 3, the insertion loss characteristic is effectively monotonic up to at least 20.0 GHz. As defined on slide 2, Fmax = 3×(Rmax÷2), so that Rmax = 2×(Fmax÷3). Setting Fmax equal to 20.0 GHz, it thus follows that the 504618/504622 series board-to-
Jim Maroney
September, 2013
Molex Global Micro Products Division
1
This report summarizes the results of the simulation of the signal integrity characteristics for differential signaling of the Molex 504618/504622 series 0.35 mm pitch board-to-board connector. The purpose of the simulations was to determine the highest data rate that can be supported by the connector. To support a given maximum data rate Rmax, a connector should ideally have an insertion loss characteristic that is effectively monotonic at frequencies at least up to Fmax, the 3rd harmonic of half the maximum data rate Rmax, or 3×(Rmax÷2). Simulations were performed up to 20 GHz. The pin assignment for each differential signal channel was GS+SG, where S+, S-, and G denote signal plus, signal minus, and ground terminals, respectively. In the graphs that follow, all results have been renormalized to 100 W, the nominal value of differential signal channel characteristic impedance, and de-embedded to the ends of the connector terminals.
Near end crosstalk NEXT and far end crosstalk FEXT are less than -37.3 and -33.4 dB, respectively, up to 20.0 GHz.
MOLEX confidential
All Results Renormalized to 100 W Molex 504618/504622 Series BB Connector