2. FMAT1011 Substitution Conclusion Not a direct substitute. The FMAT1011 shares identical technical specifications with the SA6‑06 and suffers from the same core limitation: an insufficient operational frequency range (0–6 GHz). Although it matches the original part in mechanical interface (SMA) and basic electrical parameters (6 dB, 2 W, 50 Ω), it cannot cover the millimeter‑wave front‑end frequencies supported by the original part (up to 32 GHz). Deploying the FMAT1011 in high‑frequency systems will introduce signal distortion and impedance mismatch, making it unsuitable for broadband or high‑frequency applications. Summary Neither the SA6‑06 nor the FMAT1011 can serve as a direct replacement for the M3933/30‑13N. The most critical distinction lies in the frequency range: the original part supports ultra‑wideband operation from DC to 32 GHz, whereas the two candidate substitutes are limited to DC–6 GHz. At any frequency above 6 GHz—spanning C‑, X‑, Ku‑, K‑, and Ka‑bands—the substitute parts cannot maintain their nominal attenuation accuracy or impedance‑matching characteristics. This will inevitably degrade the performance of high‑frequency signal chains. Therefore, these parts may only be considered for cost‑reduction or emergency replacement in low‑band (≤6 GHz) scenarios; they are entirely unsuitable for original designs requiring full‑band coverage up to 32 GHz.