1. FMAT7620-7 Substitution Conclusion The FMAT7620-7 can be considered a direct substitute for the AT-107V in terms of core electrical parameters. Based on the provided data, both units exhibit identical key specifications: attenuation value (7 dB), operating frequency (DC–18 GHz), impedance (50 Ω), and power handling capability (2 W). They also share the same SMA In-Line module package, ensuring drop‑in replacement and equivalent attenuation, bandwidth, and power performance in most RF signal chains. The primary difference lies in the manufacturer (Fairview Microwave versus Hirose). There may be minor variations in un‑published detailed parameters, such as attenuation accuracy, frequency response flatness, specific voltage standing wave ratio (VSWR) curves, and mechanical specifications including connector plating and torque life. Given that their nominal specifications are identical, these differences typically fall within normal manufacturing tolerances. For general commercial or industrial applications, the FMAT7620-7 can successfully replace the AT-107V. However, for applications with stringent military or aerospace qualification requirements, or those demanding extremely tight attenuation accuracy and phase consistency, it is recommended to review Fairview Microwave’s detailed datasheet or perform actual measurements to ensure full compliance with system requirements.