User Manual

Mini Module External
A
ntenna Implementation
This document is subject to change without notice.
Document No: 0011-00-16-11-000 (Issue C)
Page 6
Figure 5. displays the measurement where Port 2 was used as the measurement Port.
Figure 5. Measured Return Loss of RF trace
PRODUCTION TEST PROCEDURE FOR ENSURING COMPLIANCE
During production, host boards should be tested to ensure compliance. CEL recommends that when the host board is
manufactured, the requirement of “Electrical Testing” is specified with the PCB order to guarantee that no short is present
anywhere on the host board (which includes the trace between the U.FL connector location and the module RF castellation
pad). This greatly simplifies the production test requirements down to verifying that a solder short did not occur during
the component placement and reflow of the host board assembly. Verifying no solder short has occurred can be done by
measuring an open circuit between castellation pins 32 and 33 using a DC multi-meter.