{"product_id":"custom-frequency-helical-rf-bandpass-filter-340mhz-522mhz","title":"Custom Frequency Helical RF Bandpass Filter – 340MHz \/ 522MHz","description":"\u003ch2 style=\"text-align: center;\"\u003eCustom Frequency Helical RF Bandpass Filter – 340MHz \/ 522MHz\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003eOverview\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe Custom Frequency Helical RF Bandpass Filter is designed for wireless communication systems that require precise frequency selection and effective interference suppression. Using helical resonator technology, this compact RF filter allows signals within the specified passband to pass while attenuating unwanted signals outside the target frequency range.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAvailable in standard frequency options including 340MHz and 522MHz, this filter can also be customized to meet specific project requirements. It is suitable for COFDM wireless video transmission, UAV communication links, RF transmitters, receivers, telemetry systems, and other professional wireless applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWith low insertion loss, reliable frequency selectivity, and flexible connector options, this helical bandpass filter helps improve RF system performance and maintain signal integrity.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCustom Frequency Options:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Standard 340MHz and 522MHz versions, with additional frequency customization available.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eEffective Interference Suppression:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Reduces unwanted out-of-band signals to support cleaner RF transmission and reception.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eLow Insertion Loss:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Designed to minimize signal attenuation within the operating passband.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eHigh Frequency Selectivity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Helical resonator technology provides precise bandpass filtering.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCompact Design:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Small form factor simplifies integration into RF equipment and wireless communication systems.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eFlexible RF Connectors:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Connector configurations can be selected according to the specific model and project requirements.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCustom Power Handling:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Standard and higher-power versions are available depending on the required frequency and design.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eWide Range of Applications:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Suitable for COFDM video links, drone communications, telemetry, and professional RF systems.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eParameter\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eSpecification\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eProduct Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHelical RF Bandpass Filter\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eStandard Frequency Options\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e340MHz, 522MHz\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eStandard 340MHz Passband\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e336–344MHz\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCustom Frequency\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAvailable upon request\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eInsertion Loss\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e≤ 1.2dB for the referenced standard 340MHz model\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003ePassband Ripple\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e≤ 0.5dB for the referenced standard model\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eReturn Loss\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e≥ 15dB for the referenced standard model\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOut-of-Band Rejection\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e≥ 40dB at Fo ± 50MHz for the referenced standard model\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eImpedance\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e50Ω\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003ePower Handling\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDepends on the selected model; confirm before ordering\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eRF Connector\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eModel-dependent; N-type options are available\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eStandard Dimensions\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e89 × 20 × 32mm, excluding connectors\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCustomization\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eFrequency, bandwidth, connectors, and mechanical configuration\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eNote:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The specifications above refer to the listed standard 340MHz model where indicated. The 522MHz and custom-frequency versions may have different electrical parameters, dimensions, connectors, and power ratings. Please confirm the specifications for your selected configuration before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eApplications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eWireless Communication Systems:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Filters unwanted signals in wireless transmitters, receivers, and radio communication equipment.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCOFDM Wireless Video Transmission:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Helps suppress out-of-band interference in COFDM-based video transmission systems.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eUAV and Drone Communication:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Supports RF filtering for drone video links, telemetry, and wireless data transmission.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eRF Transmitters and Receivers:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Improves frequency selectivity in RF front-end circuits.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTelemetry Systems:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Helps maintain signal quality in remote monitoring and data communication applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eBroadcasting Equipment:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Supports frequency filtering in professional radio and broadcasting systems.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eRF Testing and Development:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Provides frequency-selective filtering for laboratory testing and RF system development.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eOEM and Embedded Systems:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Can be customized for integration into specialized communication equipment.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eCustomization Options\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eWe provide customizable helical bandpass filters for different RF system requirements.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAvailable customization options include:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCenter Frequency:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Select 340MHz, 522MHz, or specify your required frequency.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eBandwidth:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Customize the passband according to your system requirements and filtering targets.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eRF Connectors:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Connector options can be selected according to the design.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePower Handling:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Standard and higher-power versions are available depending on the frequency and filter configuration.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eMechanical Dimensions:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Housing dimensions may vary according to the selected frequency and design.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eTo obtain the correct configuration, please provide your operating frequency, required bandwidth, transmitter output power, desired out-of-band rejection, and connector type.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eFAQ\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQ1: What is a helical bandpass filter?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA helical bandpass filter is an RF component that allows signals within a specified frequency band to pass while attenuating signals outside that band. It is commonly used to reduce unwanted interference in wireless communication systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQ2: What frequency options are available?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe listed options include 340MHz and 522MHz. Custom frequencies are also available, subject to design feasibility.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQ3: Can you customize the filter for my operating frequency?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eYes. We can customize the center frequency and bandwidth according to your project requirements. Please provide your target frequency range and required filtering performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQ4: What is the insertion loss of the 340MHz version?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe referenced standard 340MHz model specifies insertion loss of ≤1.2dB. Other configurations may have different insertion-loss values.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQ5: What is the maximum power handling capability?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePower handling depends on the selected model. Standard versions are listed with a rating of up to 10W, while the product FAQ also describes a standard 5W CW version and a custom 10W CW version. Please confirm the exact rating for your selected configuration before connecting a transmitter.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQ6: Can this filter be used with a COFDM transmitter?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eYes. It is suitable for RF filtering in compatible COFDM wireless video transmission systems, provided that the filter frequency, bandwidth, connectors, and power rating match the transmitter.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQ7: Can I use this filter with an FPV video transmitter?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eYes, provided that the transmitter operates within the filter's specified passband and its RF output power does not exceed the filter's rated power.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQ8: What information should I provide when ordering a custom filter?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePlease specify:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRequired center frequency\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePassband bandwidth\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDesired out-of-band rejection\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMaximum RF input power\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConnector type\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMechanical size requirements, if applicable\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eOur team can then help determine a suitable filter configuration.\u003c\/span\u003e\u003c\/p\u003e","brand":"DVcan.com","offers":[{"title":"340MHz","offer_id":67950371930217,"sku":"DV1966","price":150.0,"currency_code":"USD","in_stock":true},{"title":"522MHz","offer_id":67950371962985,"sku":"DV1966","price":150.0,"currency_code":"USD","in_stock":true},{"title":"Custom Frequency","offer_id":67950371995753,"sku":"DV1966","price":150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0649\/4886\/3081\/files\/Helical-Bandpass-Filter-Frequency-RF-Custom.avif?v=1793674531","url":"https:\/\/dvcan.com\/products\/custom-frequency-helical-rf-bandpass-filter-340mhz-522mhz","provider":"DVcan.com","version":"1.0","type":"link"}