Xilinx Virtex-5 RocketIO GTP

248 www.xilinx.com Virtex-5 RocketIO GTP Transceiver User Guide
UG196 (v1.3) May 25, 2007
Chapter 13: Design of Transitions
R
For wide traces, curved routing can also be helpful as shown in Figure 13-20.
Figure 13-18: Simulated Return Loss of 45 Degree Bends with Jog-Outs
Figure 13-19: Simulated Phase Response of 45 Degree Bends with Jog-Outs
-10
-20
-30
-40
-50
-60
1E8 1E9
Frequency, Hz
1E10
5E10
dB(Sdd11x)
dB(Sdd11)
UG196_c13_18_051406
-75
-76
-77
4.95
Frequency, GHz
5.00
Phase(S(4,2)) Phase(S(3,1)) Phase(S(8,6)) Phase(S(7,5))
UG196_c13_19_051406