FMBL1003

Balun Overview

The FMBL1003 is a surface-mount balun manufactured by Fairview Microwave, designed for operation within the 80 MHz to 1,000 MHz frequency range. It provides a balanced-to-unbalanced impedance transformation from 50 Ohms to 25 Ohms. The component is rated for a maximum power handling of 100 Watts. Electrical specifications include an amplitude balance of ±0.35 dB and a phase balance of ±5 degrees, with a fixed 180-degree phase shift between ports.

Balun Feature Summary

• Provides balanced-to-unbalanced signal conversion
• Supports high-power transmission up to 100 Watts
• Maintains precise amplitude and phase balance characteristics

Balun Applications

• RF circuit impedance matching
• Signal distribution networks
• Balanced antenna feed systems

Balun Procurement Notes

Verify component status as obsolete before procurement planning. Confirm availability through secondary market channels or authorized distributors holding remaining stock. Ensure compatibility with existing SMT assembly processes and verify that the 50-ohm to 25-ohm transformation aligns with current design requirements.

Balun Selection Notes

Select this component when a surface-mount solution is required for frequencies between 80 MHz and 1 GHz. Consider the specific 50-ohm to 25-ohm impedance ratio and 100-watt power rating. Evaluate the tight amplitude and phase balance tolerances against system performance needs.

Balun Part Context

This balun belongs to Fairview Microwave's RF interconnect and passive component portfolio. It serves as a specialized passive device for converting unbalanced signals to balanced outputs in microwave and radio frequency applications, differing from their active mixers or waveguide adapters.

Balun Replacement Considerations

As the part is marked obsolete, no direct manufacturer substitute is listed. Engineers must identify third-party equivalents offering similar 80 MHz–1 GHz coverage, 50-ohm to 25-ohm transformation, and comparable power handling capabilities.