BFCN-4100+

Overview

The BFCN-4100+ is an LTCC bandpass filter manufactured by Mini-Circuits, designed for S-band applications. It operates within a frequency range of 3700 to 4500 MHz, centered at 4100 MHz with an 800 MHz bandwidth. The component features a 50 Ohm impedance and utilizes a 4-SMD, no-lead surface mount package. Key electrical specifications include a typical insertion loss of 1.4 dB and a flat group delay of ±45 pS. The filter exhibits good passband VSWR, typically rated at 1.2:1, ensuring efficient signal transmission within the designated band.

Feature Summary

• Utilizes Low-Temperature Co-fired Ceramic (LTCC) technology for narrow band characteristics and fast roll-off performance.
• Provides low insertion loss and good rejection at band reject edges to maintain signal integrity.
• Features flat group delay and good passband VSWR for stable phase response.

Applications

• S-band upconverter assemblies
• Satellite communications systems
• RF front-end filtering

Procurement Notes

Verify the specific datasheet version when ordering, as Mini-Circuits may update electrical parameters or mechanical drawings over time. Confirm that the 4-SMD no-lead package dimensions match your PCB footprint requirements. Ensure compatibility with standard reflow soldering profiles suitable for LTCC components. Cross-reference the part number suffix if environmental qualifications such as space-grade certification are required for your specific deployment scenario.

Selection Notes

Select this component when a compact, high-performance bandpass filter is needed for the 3.7–4.5 GHz range. The LTCC construction offers a balance of size reduction and electrical performance compared to traditional ceramic filters. Consider the 1.4 dB insertion loss and 1.2:1 VSWR when designing for sensitive receiver chains or power-efficient transmitter stages where signal fidelity is critical.

Part Context

This component belongs to Mini-Circuits' BFCN series of ceramic filters, which are engineered for robust RF performance in demanding environments. The BFCN-4100+ specifically targets S-band frequencies, leveraging LTCC manufacturing to achieve tight tolerances and reliable operation. It serves as a fundamental building block for frequency-selective applications in modern wireless infrastructure.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Mini-Circuits directly for equivalent models or updated revisions within the BFCN family.