BPF-C670+

The Mini-Circuits BPF-C670+ is a surface mount band pass filter designed for applications requiring a wide passband from 470 to 870 MHz with a center frequency of 670 MHz. It offers a typical insertion loss of 2.0 dB and a maximum of 2.8 dB, along with a good VSWR of 1.4:1 typical across the passband. The filter provides high rejection in the stop bands: at least 20 dB typical in the lower stop band (DC to 365 MHz) and upper stop band (965 to 2700 MHz), with typical rejection reaching 40 dB and 30 dB respectively. Group delay is flat at 4 ns typical, minimizing signal distortion.

The filter is fabricated using SMT technology with high Q capacitors and wire welded inductors, ensuring consistent performance across production lots and temperature. It is housed in a miniature shielded case (HU1186 style) measuring 22.10 mm x 20.32 mm x 6.35 mm, which reduces interference with surrounding components. The operating temperature range is -40°C to 85°C, making it suitable for a variety of environments.

This filter is well-suited for Digital TV applications and other RF systems that require sharp roll-off and adjacent channel rejection. The 50Ω impedance simplifies integration into standard RF circuits. The package is a 14-SMD module, compatible with surface mount assembly processes.