902–928MHz (26MHz BW), ≤1.0dB Insertion Loss, ≥50dB Out-of-Band Rejection, 50Ω Impedance, SMA-Female, Rugged Aluminum Housing, DC Short Protection.

## 915MHz Cavity Filter: High-Performance MeshCore Filter

This **915MHz Cavity Filter** is a precision-engineered bandpass filter designed to eliminate interference in the US915 ISM band. With a full **26MHz bandwidth** (902–928MHz), it is specifically built for MeshCore and LoRa mesh networks. Unlike standard SAW filters, this cavity design offers significantly higher rejection of out-of-band signals (like 5G/LTE) while maintaining an ultra-low insertion loss.

### Key Specifications
* **Center Frequency:** 915 MHz
* **Operating Bandwidth:** 902 – 928 MHz (26MHz BW)
* **Insertion Loss:** ≤ 1.0 dB (Preserves maximum signal strength)
* **Out-of-Band Rejection:** ≥ 50 dB @ 892MHz & 938MHz (Blocks cellular interference)
* **VSWR:** ≤ 1.5 (Excellent impedance matching)
* **Connectors:** SMA-Female (Standard RF ports)
* **Power Handling:** Up to 20 Watts
* **Safety:** Integrated DC short circuit protection (Basic lightning/surge arrestor)

### Why Choose This Cavity Filter?
* **MeshCore Optimization:** By filtering out "noise" from nearby cell towers and electronics, it allows your MeshCore node to "hear" weaker, more distant signals, significantly increasing the reliability of your mesh.
* **Essential for Boosters:** If using a FLARM or LoRa signal booster/amplifier (AGC), this cavity filter is required to prevent the amplifier from being saturated by out-of-band noise.
* **Boost Sensitivity:** Improved Signal-to-Noise Ratio (SNR) directly translates to better range and fewer lost packets in high-interference urban or industrial environments.
* **Rugged Build:** Housed in a heavy-duty aluminum chassis that provides superior electromagnetic shielding compared to plastic-housed filters.

*Note: For the best results, install the filter as close to the antenna as possible (Antenna > Filter > MeshCore Node).*

915MHz Cavity Filter

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