CBP-1228C+

Overview

The CBP-1228C+ is a ceramic-coaxial-resonator based bandpass filter in a shielded package fabricated using SMT technology. It operates with a center frequency of 1.228 GHz and a bandwidth of 21 MHz. The device features a 3 dB insertion loss specification and utilizes a 50 Ohm impedance system. Designed for surface mount applications, it incorporates high-Q ceramic resonators to enable sharp rejection near the passband while maintaining low passband VSWR.

Feature Summary

• Incorporates high-Q ceramic resonators for sharp rejection near the passband
• Utilizes a shielded package fabricated using SMT technology
• Maintains low passband VSWR for signal integrity

Applications

• RF filtering in radio frequency systems
• Signal processing requiring specific center frequency selection
• Surface mount circuit integration

Procurement Notes

Verify the exact part number CBP-1228C+ against official Mini-Circuits documentation before procurement. Confirm that the required specifications, including the 1.228 GHz center frequency and 21 MHz bandwidth, align with your design requirements. Ensure compatibility with surface mount assembly processes and verify that the shielded package dimensions fit your PCB layout constraints.

Selection Notes

Select this component when a precise bandpass response centered at 1.228 GHz is required. The choice is driven by the need for high selectivity provided by ceramic coaxial resonators. Consider the SMT form factor for automated assembly needs. Evaluate the 50 Ohm impedance match against system requirements. The shielded construction is suitable for environments requiring isolation from external interference.

Part Context

This component belongs to the CBP series of ceramic coaxial resonator filters offered by Mini-Circuits. These filters are characterized by their ability to provide passbands ranging from DC up to 6 GHz with fractional bandwidths from less than 1% to 25%. The series emphasizes low profile designs and robust performance through the use of high-Q resonators within shielded enclosures.

Replacement Considerations

Consult Mini-Circuits documentation for direct substitutes. Other models in the CBP series may offer similar characteristics with different frequency centers or bandwidths. Verify electrical parameters and physical footprint compatibility before substituting.