KERLINK | SKU: KLK03410_01

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Kerlink KLK03410_01 | High-Rejection RF Cavity Filter for LoRaWAN (865-870 MHz, EU868)

€259,00 €333,00

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The Kerlink KLK03410_01 is a high-rejection cavity filter that keeps your EU868 gateway sensitive.

Keeps your gateway sensitive: blocks LTE and GSM interference
Clean pass-band: tuned to the EU868 band
Rugged and compliant: metal cavity, CE and RoHS

Frequency/Region

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Description

The Kerlink KLK03410_01 is a high-performance RF cavity filter tuned for the 865–870 MHz spectrum. In dense urban areas or co-located sites near cellular towers, LoRaWAN gateways often suffer “desensitization” from powerful out-of-band LTE or GSM signals — flooding the receiver and cutting range.

Acting as a precise gatekeeper, this industrial-grade filter passes only the designated LoRa band while aggressively rejecting unwanted noise. Installed between your antenna and gateway, it restores maximum receiver sensitivity and meaningfully improves the range and reliability of your IoT network.

Core Capabilities

Superior Interference Rejection Deep attenuation of signals outside the 865–870 MHz window protects the gateway's LNA from saturation and intermodulation in noisy environments.

Low-Loss Band-Pass Passes the 865–870 MHz LoRa band with low insertion loss and 50 Ω impedance, preserving uplink sensitivity while filtering out the noise.

Rugged Metal Cavity Build A robust metal cavity provides excellent thermal stability and environmental durability for demanding outdoor deployments.

Easy N-Type Integration N-Type (female) connectors and a mounting accessories pack make it a clean inline drop-in between any standard antenna cable and gateway.

Typical Applications

Tower Co-location: Essential for LoRaWAN gateways sharing space with LTE/5G antennas or FM transmitters.

Urban Deployments: Filter out heavy background noise in city centres to increase successful uplink packets from low-power sensors.

Long-Range Links: Maximise the link budget of high-performance gateways by lowering the effective noise floor.

Technical Integration

Key points for fitting the filter into your RF path:

RF path: Installs inline between the antenna and the gateway, with N-Type (female) connectors for standard antenna cables.

Frequency: 865–870 MHz band-pass, suited to EU868 and IN865 LoRaWAN networks.

Performance: Deep out-of-band rejection of LTE/GSM noise with low insertion loss and 50 Ω impedance.

Protection: Prevents receiver desensitization by shielding the gateway's LNA from saturation and intermodulation.

Build: Rugged metal cavity for thermal stability and outdoor durability.

Setup help: For interference troubleshooting or RF-chain design, contact the shopioT technical team.

What's in the Box

1×KLK03410_01 RF Cavity Filter

1×Mounting Accessories Pack

Note: RF coaxial cables to the gateway and antenna are required and sold separately.

Frequently Asked Questions

What does this filter do?

It's a band-pass cavity filter that passes the 865–870 MHz LoRa band while rejecting out-of-band LTE and GSM noise — keeping your gateway's receiver sensitive in noisy environments.

Why would I need one?

In dense urban or co-located sites, strong out-of-band signals desensitise the gateway and reduce range. This filter restores sensitivity and increases successful uplinks.

Which band does it cover?

865–870 MHz, suited to EU868 and IN865 LoRaWAN deployments.

How is it installed?

Inline between the antenna and the gateway, using its N-Type (female) connectors. A mounting accessories pack is included.

Will it weaken my signal?

Minimally — the low-insertion-loss band-pass design preserves uplink sensitivity while removing the interference.

Is it suitable for outdoor use?

Yes — its rugged metal cavity provides thermal stability and environmental durability for outdoor gateway sites.

Certifications

RoHS

Fighting RF Interference at Your Site?

Talk to our IoT specialists, or explore the gateways and accessories to pair with it.

Talk To Our IoT Team Shop LoRaWAN Gateways Browse Antennas & Accessories

Specifications

Frequency/Region

EU868
Activation Method

Plug & Play
Environment Rating

Outdoor, Industrial
IP Rating

IP66
Operating Temperature

-30°C to 70°C
Enclosure Material

Aluminum Alloy
Measurement Technology
- Cavity Bandpass Design: Utilizes high-Q resonant cavities to provide extremely sharp roll-off outside the desired LoRaWAN band.
- Passive Filtering: Does not require power, ensuring zero additional failure points for the gateway system.
- Low Loss Materials: Constructed with silver-plated internal components to minimize insertion loss.
Measurement Range
- Passband Frequency: 865 MHz to 870 MHz.
- Rejection: Provides >40dB rejection at 862 MHz and 873 MHz (typical).
- Power Handling: Supports up to 50W CW power (Safe for gateway transmission).
Measurement Accuracy
- Insertion Loss: ≤ 1.2 dB within the passband for minimal signal degradation.
- Return Loss (VSWR): ≥ 18 dB (VSWR < 1.3:1) for optimal impedance matching.
- Passband Ripple: ≤ 0.5 dB for consistent performance across all LoRaWAN channels.
Measurement Resolution
- Frequency Selectivity: Sharp skirts allow for maximum sensitivity even in high-noise urban environments.
- Stability: Thermal compensation design maintains frequency center across the full operating temperature range.

Document Library

Kerlink Cavity Filter Datasheet

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Kerlink KLK03410_01 | High-Rejection RF Cavity Filter for LoRaWAN (865-870 MHz, EU868)

VAT Free Transaction Option

Secure Payment & Warranty

Delivery and Shipping