1. Compatibility: Within the original design frequency (≤3GHz), the performance of the alternative part is guaranteed to meet the requirements with no risk of degradation. 2. Performance Margin: The wider frequency band indicates superior high-frequency design of the alternative part (e.g., internal structure, material, and matching optimization), potentially offering more stable VSWR and temperature characteristics below 3GHz. 3. Application Extension: If the system requires future upgrades to higher frequencies (e.g., 5G, millimeter-wave testing), the alternative part can directly support such expansion without the need for re-selection. In summary, this alternative is fully compatible in both electrical performance and mechanical interface, while the extended frequency band provides headroom for system upgrades. Direct replacement is recommended.