Dual 915MHz Passive BPF Modules

This package contains two identical passive band pass filter (BPF) modules, each built on a printed circuit board and precisely tuned to 915 MHz with a bandwidth of ±15 MHz (900–930 MHz). Designed for RF signal conditioning in low-power wireless systems, each unit uses SMA female connectors on input and output, and maintains a stable 50-ohm impedance throughout the passband. Physical dimensions follow standard PCB form factors, with manufacturing tolerance of 1–3 cm. Key electrical characteristics include 1.5 dB typical insertion loss within the passband — ensuring efficient signal transmission — and 40 dB suppression measured at ±50 MHz from centre frequency (i.e., at 865 MHz and 965 MHz), offering robust rejection of out-of-band noise and spurious emissions. Maximum input RF power is specified at 13 dBm (20 mW), making these filters suitable for use after power amplifiers or before sensitive receiver inputs in sub-GHz IoT hardware. No bias voltage or control logic is needed — operation is fully passive and immediate. The dual-unit configuration supports parallel evaluation, matched-pair deployment, or redundancy in field-deployed sensor networks using 915 MHz protocols such as LoRa, Sigfox (where permitted), or proprietary telemetry links.