{"title":"RF Filters","description":"","products":[{"product_id":"outdoor-cavity-band-pass-filter-lorawan","title":"RAK Outdoor Cavity Band-Pass Filter for Gateways for LoRaWAN® | High-rejection filter for LoRa® Frequency Bands","description":"\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eWhat Is a LoRaWAN Cavity Band-Pass Filter?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eA LoRaWAN Cavity Band-Pass Filter like the\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eRAK Outdoor Cavity Band-Pass Filter\u003c\/strong\u003e\u003cspan\u003e is a hardware component that \u003c\/span\u003e\u003cstrong\u003eallows only the desired LoRaWAN frequency band to pass through\u003c\/strong\u003e\u003cspan\u003e, while attenuating nearby unwanted signals such as LTE, 5G, radar, or train communication systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eIt uses high-Q resonant cavities to isolate the target band, protecting LoRa gateways from strong external interference. This is particularly important in \u003c\/span\u003e\u003cstrong\u003ehigh-noise, urban, or industrial environments\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe RAK outdoor RF filter for gateways for LoRaWAN is\u003c\/span\u003e\u003cspan\u003e designed to work with the following RAKwireless gateways:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003ca href=\"https:\/\/store.rakwireless.com\/products\/rak7289-8-16-channel-outdoor-lorawan-gateway?variant=41806809661638\u0026amp;intsource=rak_store\u0026amp;intmedium=organic\u0026amp;intcampaign=rak-outdoor-cavity-band-pass-filter\u0026amp;intterm=wisgate-edge-pro-rak7289v2-cv2\u0026amp;intcontent=store_link\"\u003e\u003cspan\u003eWisGate Edge Pro RAK7289V2\/CV2\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003ca href=\"https:\/\/store.rakwireless.com\/products\/rak7240-ip65-outdoor-lorawan-gateway?variant=42615533207750\u0026amp;intsource=rak_store\u0026amp;intmedium=organic\u0026amp;intcampaign=rak-outdoor-cavity-band-pass-filter\u0026amp;intterm=wisgate-edge-prime-rak7240v2-cv2\u0026amp;intcontent=store_link\"\u003e\u003cspan\u003eWisGate Edge Prime RAK7240V2\/CV2\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\n\u003cspan\u003eWisGate Connect RAK7393 \u003c\/span\u003e\u003cspan\u003e(coming soon)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eAnd other brand gateways using standard N-Female RF connectors\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 dir=\"ltr\"\u003e\n\u003cspan\u003eWhen to Use a \u003c\/span\u003e\u003cspan\u003eCavity Band-Pass Filter with a Gateway for LoRaWAN\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cstrong\u003eNear Cellular Towers\u003c\/strong\u003e\u003cspan\u003e\u003cstrong\u003e \u003c\/strong\u003e– Prevents strong LTE\/5G signals (700–900 MHz) from desensitizing the LoRa receiver.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cstrong\u003eIndustrial Sites\u003c\/strong\u003e\u003cspan\u003e – Filters out wideband RF noise from heavy machinery, telemetry, or private radios.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cstrong\u003eSmart City Rooftops\u003c\/strong\u003e\u003cspan\u003e\u003cstrong\u003e \u003c\/strong\u003e– Blocks interference from FM radio, TETRA\/P25 public safety radios, or WiFi mesh.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cstrong\u003eCo-location with Other ISM Devices\u003c\/strong\u003e\u003cspan\u003e – Avoids spurious interference from Zigbee, alarms, or SRDs sharing ISM bands.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cspan\u003e\u003cstrong\u003eAgriculture Near Radar \/ Military Installations\u003c\/strong\u003e \u003c\/span\u003e\u003cspan\u003e– Protects against high-power pulsed radar signals.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cstrong\u003eDense Gateway Environments \u003c\/strong\u003e\u003cspan\u003e– Prevents cross-interference when multiple radios share the same mast.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cstrong\u003eRural Long-Range Towers\u003c\/strong\u003e\u003cspan\u003e – Suppresses strong distant broadcast signals (FM, DVB) that raise noise floor.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eKey Features of RAK Outdoor Cavity Band-Pass Filter\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u0026gt;70-80 dB attenuation outside the passband, effectively suppressing nearby LTE\/5G\/RF noise\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003eLow insertion loss (\u0026lt;2.0–3.2 dB depending on model)\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eFully sealed for rain, snow, dust, and high humidity environments\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eEasy integration with existing RF hardware. No adapters needed.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eSupports global LoRa deployments: EU868, US915, CN470, IN865\/RU864\/AU915\/KR920\/AS923-1\/AS923-2\/AS923-3\/AS923-4\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eKey Benefits of RAK Outdoor Cavity Band-Pass Filter\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThis filter improves network reliability and ensures \u003c\/span\u003e\u003cstrong\u003eLoRa signal noise suppression\u003c\/strong\u003e\u003cspan\u003e, giving operators clearer signal performance and\u003c\/span\u003e\u003cspan\u003e consistent results in varied deployment environments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eReduces troubleshooting caused by unpredictable RF noise\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eImproves consistency of network data delivery\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eHelps extend useful life of deployed gateways\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eSupports planning in mixed urban and industrial landscapes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003eLoRa signal noise suppression\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan\u003eUse Case #1: Smart City Gateway Near a Cellular Tower\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003cmeta charset=\"utf-8\"\u003eCustomers deploying LoRa gateways near LTE towers have observed a \u003cstrong\u003esignificant reduction in packet loss \u003c\/strong\u003eafter adding the RAK Outdoor Cavity Band-Pass Filter. In many cases,\u003cstrong\u003e packet loss dropped from double-digit percentages to nearly zero\u003c\/strong\u003e, and overall network reliability improved, with gateway-connected applications such as street lighting and traffic sensors achieving more than 99% service availability.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan\u003eUse Case #2: Industrial Facility with Heavy Equipment\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eAn energy plant operating welding and motor-heavy equipment used the RAK Cavity Filter to stabilize its LoRa network. It\u003cstrong\u003e reduced interference-related data errors and maintained consistent uplink success rates\u003c\/strong\u003e across the facility.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eComparison Table: RAK Outdoor Cavity Band-Pass Filter vs. Generic RF Filters\u003c\/span\u003e\u003c\/h2\u003e\n\u003cstyle\u003e\n  table {\n    border-collapse: collapse;\n    width: 100%;\n  }\n  table td, table th {\n    border: 1px solid #ddd;\n    padding: 10px 12px; \/* moderate spacing *\/\n    line-height: 1.5;   \/* more readable *\/\n    vertical-align: top;\n  }\n  table th {\n    font-weight: bold;\n    text-align: left;\n  }\n\u003c\/style\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature \/ Capability\u003c\/th\u003e\n\u003cth\u003eRAK Outdoor Cavity Band-Pass Filter\u003c\/th\u003e\n\u003cth\u003eGeneric RF Filters\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign Purpose\u003c\/td\u003e\n\u003ctd\u003eOptimized specifically for gateway for LoRaWAN deployments\u003c\/td\u003e\n\u003ctd\u003eGeneral-purpose RF filtering (not LoRa-specific)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Variants\u003c\/td\u003e\n\u003ctd\u003eSupports global LoRaWAN bands\u003c\/td\u003e\n\u003ctd\u003eLimited or fixed bands, often not matching LoRaWAN frequencies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOut-of-Band Rejection\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u0026gt;70-80 dB attenuation, effectively blocking LTE, 5G, radar, and industrial noise\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003eTypically lower rejection (~30–50 dB), insufficient in noisy environments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsertion Loss\u003c\/td\u003e\n\u003ctd\u003eLow (\u0026lt;2.0–3.2 dB depending on model), preserving LoRa signal strength\u003c\/td\u003e\n\u003ctd\u003eHigher or variable, can degrade link performance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Durability\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eIP67-rated, withstands −40°C to +65°C, dustproof, waterproof \u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003eOften indoor-grade; limited weather resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGateway Compatibility\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eDirectly integrates with WisGate Edge Pro, Edge Prime, WisGate Connect (coming soon), and other gateways with N-Female connectors\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003eRequires adapters or may not fit LoRa gateways\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEase of Deployment\u003c\/td\u003e\n\u003ctd\u003ePlug-and-play with coaxial cables, antenna can mount directly to filter\u003c\/td\u003e\n\u003ctd\u003eMay require custom integration, not optimized for LoRa setups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUse Cases\u003c\/td\u003e\n\u003ctd\u003eSmart city, industrial IoT, urban high-noise environments\u003c\/td\u003e\n\u003ctd\u003eGeneral RF applications, not tailored for LoRaWAN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eHow to Select the Right Cavity Band-Pass Filter\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eChoose the appropriate filter model based on your LoRa deployment frequency.\u003c\/span\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n  table {\n    border-collapse: collapse;\n    width: 100%;\n  }\n  table td, table th {\n    border: 1px solid #ddd;\n    padding: 10px 12px; \/* moderate spacing *\/\n    line-height: 1.5;   \/* balanced readability *\/\n    vertical-align: top;\n  }\n  table th {\n    font-weight: bold;\n    text-align: left;\n  }\n\u003c\/style\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eBand (MHz)\u003c\/th\u003e\n\u003cth\u003eInsertion Loss (dB)\u003c\/th\u003e\n\u003cth\u003eRejection (dB)\u003c\/th\u003e\n\u003cth\u003eDimensions (mm)\u003c\/th\u003e\n\u003cth\u003eWeight (kg)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRAK-BPF01\u003c\/td\u003e\n\u003ctd\u003e470–510\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;2.5\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;75\u003c\/td\u003e\n\u003ctd\u003e280 × 170 × 75\u003c\/td\u003e\n\u003ctd\u003e3.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRAK-BPF03\u003c\/td\u003e\n\u003ctd\u003e863–870\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;2.5\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;70\u003c\/td\u003e\n\u003ctd\u003e228 × 164.6 × 51.5\u003c\/td\u003e\n\u003ctd\u003e1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRAK-BPF04\u003c\/td\u003e\n\u003ctd\u003e865–867\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;3.2\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;80\u003c\/td\u003e\n\u003ctd\u003e250 × 170 × 55\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRAK-BPF05\u003c\/td\u003e\n\u003ctd\u003e902–928\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;2.0\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;75\u003c\/td\u003e\n\u003ctd\u003e270 × 170 × 55\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRAK-BPF06\u003c\/td\u003e\n\u003ctd\u003e915–921\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;2.5\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;75\u003c\/td\u003e\n\u003ctd\u003e250 × 170 × 55\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRAK-BPF07\u003c\/td\u003e\n\u003ctd\u003e915–928\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;2.6\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;75\u003c\/td\u003e\n\u003ctd\u003e250 × 170 × 55\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRAK-BPF08\u003c\/td\u003e\n\u003ctd\u003e920–925\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;2.85\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;80\u003c\/td\u003e\n\u003ctd\u003e228 × 164.6 × 51.5\u003c\/td\u003e\n\u003ctd\u003e1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan\u003eCheck the frequency label on your device or consult the regional LoRaWAN specification to select the appropriate model.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFor example:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003eUse the EU868 LoRaWAN band filter when deploying in Europe.\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003eUse the US915 LoRa band-pass filter when deploying in the United States.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eIf you need a custom frequency band or special configuration, feel free to contact us at inquiry@rakwireless.com.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eWhat’s in the Box\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e1 pc Cavity Bandpass Filter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e1 pc Coaxial RF Cables for Gateway\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e1 pc Waterproof Tape\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e1 pc PVC Tape\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e2 pc Steel straps (Diameter of 40-135mm)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eHow to Get Started with RAK Outdoor Cavity Band-Pass Filter\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/docs.rakwireless.com\/product-categories\/accessories\/cavity-band-pass-filter\/overview\/?utm_source=rak_store\u0026amp;utm_medium=organic\u0026amp;utm_campaign=rak-outdoor-cavity-band-pass-filter\u0026amp;utm_term=overview\u0026amp;utm_content=documentation-link\"\u003e\u003cspan\u003eOverview of RAK Outdoor Cavity Band-Pass Filter\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/docs.rakwireless.com\/product-categories\/accessories\/cavity-band-pass-filter\/datasheet\/?utm_source=rak_store\u0026amp;utm_medium=organic\u0026amp;utm_campaign=rak-outdoor-cavity-band-pass-filter\u0026amp;utm_term=datasheet\u0026amp;utm_content=documentation-link\"\u003e\u003cspan\u003eDatasheet of RAK Outdoor Cavity Band-Pass Filter\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/docs.rakwireless.com\/product-categories\/accessories\/cavity-band-pass-filter\/installation-guide\/?utm_source=rak_store\u0026amp;utm_medium=organic\u0026amp;utm_campaign=rak-outdoor-cavity-band-pass-filter\u0026amp;utm_term=installation-guide\u0026amp;utm_content=documentation-link\"\u003e\u003cspan\u003eInstallation Guide for RAK Outdoor Cavity Band-Pass Filter\u003c\/span\u003e\u003c\/a\u003e\u003cb id=\"docs-internal-guid-56a2a462-7fff-738c-cee6-bfdc16da3fa5\"\u003e\u003c\/b\u003e\u003ca href=\"https:\/\/docs.rakwireless.com\/product-categories\/accessories\/cavity-band-pass-filter\/overview\/?utm_source=rak_store\u0026amp;utm_medium=organic\u0026amp;utm_campaign=rak-outdoor-cavity-band-pass-filter\u0026amp;utm_term=overview\u0026amp;utm_content=documentation-link\"\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eFrequently Asked Questions\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan\u003eWhat is a cavity bandpass filter?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eA cavity bandpass filter is an RF component that allows signals within a specific frequency range to pass while blocking unwanted signals outside that range. It uses high-Q resonant cavities to achieve very sharp selectivity, offering strong out-of-band rejection. In LoRaWAN applications, cavity bandpass filters protect gateways from interference caused by nearby LTE, 5G, or industrial noise sources. This ensures more reliable signal reception in dense or noisy environments.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan\u003eHow would you know if your filter is a low-pass, high-pass, or band-pass filter?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eYou can identify the type of filter by looking at its frequency response. A low-pass filter allows lower frequencies through while attenuating higher ones. A high-pass filter does the opposite, letting only higher frequencies pass. A band-pass filter, such as the RAK cavity filter for gateway for LoRaWAN, passes only a defined range of frequencies and blocks both lower and higher signals. Datasheets or specifications usually indicate the filter’s type and operating band.\u003c\/span\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan\u003eWill the filter reduce my communication range?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eInsertion loss is less than 2.5 dB, which has minimal impact on real-world link performance. In practice, your LoRaWAN communication range remains largely unaffected, while reliability and data consistency actually improve in noisy RF environments. By suppressing unwanted LTE, 5G, or industrial signals, the filter enhances signal quality and reduces packet loss.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan\u003eHow do I choose the right frequency version?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eSelect based on the LoRa® band used in your country or region. For example, EU = 868 MHz, US = 915 MHz, CN = 470 MHz. Always check the frequency label on your gateway or follow the regional LoRaWAN specification. RAK provides multiple frequency variants so you can match the filter precisely to your network.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eDo I need to ground the band pass filter?\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eYes. We highly recommend grounding the filter to earth using ≥10 AWG wire to reduce static buildup and improve electrostatic discharge (ESD) safety. Grounding helps minimize the risk of damage caused by static accumulation, especially in outdoor deployments where dry air and wind can increase charge buildup. However, grounding alone does not protect against lightning strikes. For proper lightning protection, a dedicated lightning arrestor should be installed as part of the antenna and RF chain.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan\u003eCan the antenna be mounted directly on the filter?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eYes, the design allows flexibility in how the antenna is connected. You can attach the antenna directly to Port 2 of the filter, creating a compact setup that reduces cable runs. Alternatively, you may use the included coaxial extension cable if your antenna needs to be positioned away from the gateway. Both configurations maintain signal integrity and make the filter easy to integrate into different LoRaWAN deployment scenarios.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan\u003eCan I use two filters in series?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eIn extreme interference environments, yes. However, be aware that each filter adds a small insertion loss, so using two will slightly reduce overall signal strength. In most cases, a single RAK Outdoor Cavity Band-Pass Filter provides more than sufficient protection.\u003c\/span\u003e\u003c\/p\u003e","brand":"rak-staging","offers":[{"title":"920–925MHz (AS923-2 \/ KR920 \/ Partial AS923-1) for Korea \/ Taiwan \/ Hong Kong \/ Macao \/ Singapore \/ Thailand","offer_id":47048612216999,"sku":"918001","price":290.0,"currency_code":"USD","in_stock":true},{"title":"915–928MHz (AU915 \/ AS923-1) for Australia \/ New Zealand \/ Latin America","offer_id":47048612249767,"sku":"916275","price":290.0,"currency_code":"USD","in_stock":true},{"title":"915–921MHz (AS923-3 \/ AS923-4) for Vietnam \/ Indonesia \/ Philippines \/ Brunei \/ Cambodia \/ Laos","offer_id":47048612282535,"sku":"919001","price":290.0,"currency_code":"USD","in_stock":true},{"title":"902–928MHz (US915) for USA \/ Canada \/ Mexico","offer_id":47048612315303,"sku":"917001","price":290.0,"currency_code":"USD","in_stock":true},{"title":"865–867 MHz (IN865) for India","offer_id":47048612348071,"sku":"914001","price":290.0,"currency_code":"USD","in_stock":true},{"title":"863–870MHz (EU868 \/ RU864) for Europe \/ Russia","offer_id":47048612380839,"sku":"915282","price":290.0,"currency_code":"USD","in_stock":true},{"title":"470–510 MHz (CN470) for China","offer_id":47048612413607,"sku":"912034","price":290.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0455\/2333\/7383\/files\/rak-outdoor-cavity-band-pass-filter-usecase-v2.webp?v=1762900244"}],"url":"https:\/\/rak-staging.myshopify.com\/collections\/rf-filters.oembed","provider":"rak-staging","version":"1.0","type":"link"}