1. FMAT7620-8 Substitution Conclusion The FMAT7620-8 is fully capable of replacing the original part LCAT1001-08, offering performance advantages in certain aspects. Both components share identical core parameters—attenuation value (8 dB), rated power (2 W), and characteristic impedance (50 Ω)—ensuring equivalent electrical performance within the original design frequency band (DC–3 GHz). Differences in Frequency Range: The FMAT7620-8 supports DC–18 GHz, significantly wider than the original part’s DC–3 GHz range. This gives the FMAT7620-8 superior high‑frequency performance and broader application bandwidth, eliminating the need to replace this component in future system frequency upgrades. Moreover, to maintain good performance up to 18 GHz, its internal circuit design, materials, and process standards are typically more stringent. This may bring potential benefits such as improved voltage standing wave ratio (VSWR) stability or phase consistency even at frequencies below 3 GHz. The substitution is not only feasible but represents a forward‑compatible upgrade.