Mesh Ceramic Filter

A ceramic filters for the ISM band. These bandpass filters are some of the absolute best I’ve used in my builds. This filters out RFI from Cell towers and UHF TV Sites. They are tuned for 915 +/- 13MHz. Simply put them in line of the antenna and watch your range for both transmit and reception improve! 

Spec:
Passband: 915mhz +/-13MHZ
Insertion Loss: 1.5-1.75 db
Rejection at 885mhz (first strong LET signal): 12db
ESD/Lightning protection: Polymer ESD Suppressor + bleed resistor on antenna port

typically I use These in my mountain top nodes at repeater sites. In these locations my mesh devices go deaf because the amount of RF around them. The little ESP32 and NRF boards are vulnerable because they’re so low power. The ceramic filters insulate them from the higher power equipment on the sites. 

these are designed by wehooper4 from the Bay Area Mesh. They have been implemented and proven in these highly dense networks that span the entire Pacific Northwest.