INDBOOSTER 868MHz 915MHz 1.2GHz cavity filter for RF signal devices
INDBOOSTER High-Performance Cavity Filters: The Shield Your Network Needs
In the world of RF communication, a filter’s job isn't just to "pass" a signal—it’s to defend it. Whether you are scaling a Helium hotspot network, deploying industrial LoRaWAN sensors, or tracking aircraft via ADS-B, the airwaves are more crowded than ever.
Why You Need High Out-of-Band Rejection
The primary function of a filter is to eliminate interfering signals. The higher the out-of-band rejection—and the closer this performance is to your desired operating band—the better.
Buyer Beware: A filter that does not clearly specify out-of-band rejection is misleading. Without significant suppression, it functions merely as a transmission line, offering near-zero insertion loss but absolutely zero protection. INDBOOSTER filters are engineered for real-world performance, providing the critical shielding required to maintain signal integrity in "noisy" urban environments.
1. INDBOOSTER 915MHz Cavity Filter (US915)
Precision-Engineered for North American LoRaWAN & Helium Networks
The INDBOOSTER 915MHz Cavity Filter is optimized for the 902-928MHz spectrum. It is the gold standard for operators facing interference from nearby 4G/5G cellular towers, GSM, or high-power WiFi equipment.
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Ultra-Low Insertion Loss: At only 1.0dB, your signal stays strong from the antenna to the miner.
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Massive Suppression: Delivers 60dB rejection just 10MHz away from the band edge, effectively silencing nearby "noise."
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Built-in Protection: Features integrated DC short circuit protection, acting as a fundamental surge and lightning arrestor for your indoor equipment.
915MHz Specifications
| Parameter | Specification | Benefit |
| Center Frequency | 915 MHz | Target for Helium & US LoRaWAN |
| Bandwidth | 902 - 928 MHz | Full 26MHz coverage |
| Insertion Loss | ≤ 1.0 dB | Preserves maximum signal power |
| Out-of-Band Rejection | ≥ 60 dB | Blocks 99.9999% of close-in interference |
| VSWR | ≤ 1.5 | Efficient impedance matching |
| Housing | Rugged Aluminum | Durable, industrial-grade build |
2. INDBOOSTER 868MHz Cavity Filter (EU868)
The Ultimate Link Stabilizer for European IoT Deployments
Designed specifically for the 863-870MHz ISM band, the INDBOOSTER 868MHz model ensures a clean, stable link for European Helium hotspots. By shielding your system from common cellular and RF interference, it prevents "deafness" in your receiver.
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High Selectivity: Sharp roll-off starts at just 10MHz from the band edge.
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Plug-and-Play: Standard SMA Female connectors allow for seamless integration into existing indoor setups.
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Rugged Construction: Housed in a robust aluminum chassis to ensure long-term reliability.
868MHz Specifications
| Parameter | Specification | Benefit |
| Center Frequency | 868 MHz | Target for EU LoRaWAN & Helium |
| Bandwidth | 863 - 870 MHz | Standard EU compliance |
| Port Protection | DC Short | Basic surge/lightning protection |
| Insertion Loss | ≤ 1.0 dB | Minimal signal weakening |
| Intended Use | Indoor | Controlled environment deployment |
3. INDBOOSTER 1090MHz ADS-B Cavity Filter
Maximum Sensitivity for Flight Tracking Networks
For ADS-B enthusiasts and professionals, every decibel counts. The INDBOOSTER 1090MHz Filter is designed for the 1086-1094MHz range, providing the extreme rejection levels needed to isolate weak aircraft signals from surrounding urban noise.
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Pro-Grade Connectors: Equipped with N-Type ports for high-frequency stability and outdoor-ready performance.
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Unrivaled Rejection: Offers ≥75dB suppression at 1060MHz and 1120MHz, ensuring your ADS-B receiver isn't overwhelmed by nearby transmitters.
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Efficient Power: With a nominal loss of only 0.5dB, it is one of the "cleanest" filters on the market.
1090MHz Specifications
| Parameter | Specification |
| Frequency Range | 1086 - 1094 MHz |
| Insertion Loss | ≤ 0.5 dB (Nominal) |
| Out-of-Band Rejection | ≥ 75 dB @ 1060MHz / 1120MHz |
| VSWR | ≤ 1.2 |
| Connectors | N-Type (Dual Port) |
| Surface Finish | Stealth Black Aluminum |
