
Altera Corporation
4–49
February 2005
Stratix GX Device Handbook, Volume 3
Stratix GX Board Design Guidelines
Figure 4–48. Simulation Setup for a Grounded Coplanar Wave Guide
Figure 4–49. Simulation Results for a Grounded Coplanar Wave Guide
Figure 4–50 shows the Stratix GX development board’s grounded
coplanar wave guide and its edge-coupled differential offset stripline
layout capture plot. This particular differential pair was used for the
1.0-Gbps source synchronous lines.
123
4
56
78
9
010
-70
-65
-60
-55
-50
-45
-75
-40
freq, GHz
Input Reflection Coefficient
12
345
6
78
9
010
-0.8
-0.7
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
-0.9
0.0
freq, GHz
Forward Transmission, dB
dB(S(1,1))
dB(S(2,1))