Guideline for improvement of signal loss with using shielding materials for FPCB

This proposal suggests a guideline for improvement of signal loss with using shielding materials for FPCBs. This proposal also indicates a measuring method for signal loss variation of FPCBs using shielding materials with network analyzer equipment. This method restricts to measuring only the value of the signal loss variation with using shielding materials for FPCBs. This guideline, however, neither determine nor indicate the structure or material of FPCB.