1. FMAT7620-1 Substitution Conclusion The FMAT7620-1 can serve as a complete drop-in replacement for the original SA6H-01 part. Both components share identical core electrical and mechanical specifications—1 dB attenuation, 50-ohm impedance, 2W power handling, and SMA coaxial packaging—ensuring direct performance interchangeability within the original design frequency range of up to 6 GHz. The key difference lies in the frequency range: the FMAT7620-1 significantly extends the upper frequency limit from 6 GHz to 18 GHz. This enhancement is achieved through the use of a higher-performance substrate, a more precise internal structure, and optimized compensation design. These improvements result in superior attenuation flatness and VSWR performance across the extended bandwidth. Consequently, the FMAT7620-1 not only provides seamless replacement in existing applications but also offers performance headroom for potential future system upgrades to higher frequencies. This substitution represents a fully upward-compatible solution.