Definition

Embedded microstrip is a signal trace buried within the PCB dielectric, referenced to a single plane below but with additional dielectric material above (not a second reference plane - that would be stripline). Embedding lowers impedance by approximately 20% compared to equivalent surface microstrip due to the increased effective dielectric constant. Embedded microstrip offers better EMI containment than surface traces since the dielectric above provides some shielding, while still allowing access from one side for test points if needed.