Figure 7: Antenna Line Stripline Routes On Inner Layer
These line widths may vary depending on the stack up selected for the main board.
6.3
RF Antenna Layout Parameters
Type of Guidance
Requirement
Trace impedance
50-Ohms ± 10% single-ended
Total route length
<100-mm
Ground between signals
> 1 x line width of ground trace between, stitched VIA to ground
Ground between signals
> 3 x line width of ground trace between, stitched VIA to ground
Spacing to other signals
< 3:1
•
The RF signals should be routed STRAIGHT OUT OF THE NAD TO THE NEAREST EDGE along
similar route pat but separated by ground trace.
•
Trace impedances should match the table, either as microstrip or stripline.
•
Total length for both signals should be kept to a minimum always optimizing the PRIMARY_ANT
(LTE_ANT_1) path.
•
Spacing to ground or other signals on outside of bundled signals should match the table.
