{"product_id":"beitian-bt-304b-antenna","title":"Beitian BT-304B Bluetooth GNSS\/WiFi\/4G 3-in-1 Full-Band Antenna for High-Precision Positioning","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eBeitian BT-304 \/ BT-304B is a 3-in-1 full-band measurement antenna that integrates GNSS, WiFi, mobile communications (4G), and Bluetooth for high-precision positioning applications such as USV platforms and other moving carriers. It is designed for multi-system, multi-band signal reception and is suitable for navigation scheduling, tracking and monitoring, and measurement\/control use cases.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e3-in-1 integrated design: GNSS + WiFi + 4G (Bluetooth also supported per model naming)\u003c\/li\u003e\n\u003cli\u003eMulti-constellation \/ multi-band reception support: GPS, BDS, GLONASS, GALILEO, SBAS, QZSS, IRNSS, plus L-Band\u003c\/li\u003e\n\u003cli\u003eRight-hand circular polarization\u003c\/li\u003e\n\u003cli\u003eLow VSWR (≤2.0) and noise figure (≤2.0 dB)\u003c\/li\u003e\n\u003cli\u003eWide operating voltage: 3.3-12.0 V\u003c\/li\u003e\n\u003cli\u003eHigh LNA gain: 40±2 dB\u003c\/li\u003e\n\u003cli\u003eStable phase center design with specified phase center error ±2 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable models (Shopify options)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBT-304; BT-304B\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eElectrical Specifications (BT-304 \/ BT-304B)\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eBT-304\u003c\/th\u003e\n\u003cth\u003eBT-304B\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWorking mode \/ supported signals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n        GPS L1\/L2\/L5\u003cbr\u003e\n        BDS B1I\/B2I\/B3I\/B1C\/B2a\/B2b\u003cbr\u003e\n        GLONASS L1\/L2\/L3\u003cbr\u003e\n        GALILEO E1\/E5a\/E5b\/E6\u003cbr\u003e\n        SBAS L1\/L5\u003cbr\u003e\n        QZSS L1\/L2\/L5\/L6\u003cbr\u003e\n        IRNSS L5, L-Band\u003cbr\u003e\n        WiFi, 4G\n      \u003c\/td\u003e\n\u003ctd\u003e\n        GPS L1\/L2\/L5\u003cbr\u003e\n        BDS B1I\/B2I\/B3I\/B1C\/B2a\/B2b\u003cbr\u003e\n        GLONASS L1\/L2\/L3\u003cbr\u003e\n        GALILEO E1\/E5a\/E5b\/E6\u003cbr\u003e\n        SBAS L1\/L5\u003cbr\u003e\n        QZSS L1\/L2\/L5\/L6\u003cbr\u003e\n        IRNSS L5, L-Band\u003cbr\u003e\n        WiFi, 4G\n      \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGain (dBi)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGNSS: 5.5; WiFi: 1 dBi; 4G: 0.5 dBi\u003c\/td\u003e\n\u003ctd\u003eGNSS: 5.5; WiFi: 1 dBi; 4G: 0.5 dBi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAntenna AR (dB)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤3.0\u003c\/td\u003e\n\u003ctd\u003e≤3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePhase center error (mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±2\u003c\/td\u003e\n\u003ctd\u003e±2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePolarization\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRight-hand circular polarization\u003c\/td\u003e\n\u003ctd\u003eRight-hand circular polarization\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNoise figure (dB)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤2.0\u003c\/td\u003e\n\u003ctd\u003e≤2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVSWR\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤2.0\u003c\/td\u003e\n\u003ctd\u003e≤2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput VSWR\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤2.0\u003c\/td\u003e\n\u003ctd\u003e≤2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePort impedance (Ω)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLNA gain (dB)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e40±2\u003c\/td\u003e\n\u003ctd\u003e40±2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBand flatness (dB)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±2\u003c\/td\u003e\n\u003ctd\u003e±2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating voltage (V)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.3-12.0\u003c\/td\u003e\n\u003ctd\u003e3.3-12.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupply \/ operating current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤45 mA\u003c\/td\u003e\n\u003ctd\u003e≤45 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDifferential transmission delay (ns)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤5\u003c\/td\u003e\n\u003ctd\u003e≤5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnector type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGNSS: MCX-K; WiFi: MCX-K; 4G: MCX-K\u003c\/td\u003e\n\u003ctd\u003eGNSS: MCX-JW; WiFi: MCX-JW; 4G: MCX-JW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCable\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003ctd\u003eRG316 Cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCable length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003ctd\u003e10 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200 g\u003c\/td\u003e\n\u003ctd\u003e200 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eΦ128*23.6 mm\u003c\/td\u003e\n\u003ctd\u003eΦ128 mm*22.7 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40°C ~ +85°C\u003c\/td\u003e\n\u003ctd\u003e-40°C ~ +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStorage temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-55°C ~ +85°C\u003c\/td\u003e\n\u003ctd\u003e-55°C ~ +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHumidity \/ wet degree\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e95% non-condensing\u003c\/td\u003e\n\u003ctd\u003e95% non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eMechanical Drawing Notes (selected dimensions)\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct size chart tolerance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUndimensioned ±0.3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTop-view diameter callouts\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eØ128, Ø120, Ø110, Ø86, Ø71.5, Ø80.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThickness callout (drawing)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e23.6 ±0.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting \/ layout callouts (drawing)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e70, 42, 30, 15; 6-Ø3.5; 3-MCX-K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eNavigation scheduling, tracking and monitoring, measurement and control\u003c\/li\u003e\n\u003cli\u003eIntelligent vehicles, container operations, special vehicles\u003c\/li\u003e\n\u003cli\u003ePrecision agriculture\u003c\/li\u003e\n\u003cli\u003eEngineering surveying and slope surveying\/monitoring\u003c\/li\u003e\n\u003cli\u003ePositioning and speed measurement of moving carriers in high dynamic environments\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor selection help between BT-304 and BT-304B and integration guidance (connectors\/cable), contact support@rcdrone.top or visit https:\/\/rcdrone.top\/.\u003c\/p\u003e\u003ch2\u003eWhat's Included\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eBT-304 antenna x1\u003c\/li\u003e\u003c\/ul\u003e\u003ch2 id=\"details\"\u003eDetails\u003c\/h2\u003e\u003cdiv class=\"details-gallery\"\u003e\n\u003cimg alt=\"BT-304 vs BT-304B specification table for Beitian 3-in-1 GNSS, WiFi and 4G measurement antenna\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-USV-High-Precision-Positioning-Bluetooth-4G-WIFI.png?v=1783593744\"\u003e\u003cp\u003eKey specifications for both options are summarized here so you can choose BT-304 or BT-304B with confidence.\u003c\/p\u003e\n\u003cimg alt=\"Beitian BT-304B 3-in-1 full-band antenna overview for GNSS positioning with WiFi, 4G and Bluetooth support\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-USV-High-Precision-Positioning-Bluetooth-4G-WIFI_f22b7fbf-382d-46e8-8a6c-3cd0fdfb7270.png?v=1783593755\"\u003e\u003cp\u003eA compact 3‑in‑1 antenna that combines full-band GNSS reception with WiFi and 4G connectivity for high-precision positioning.\u003c\/p\u003e\n\u003cimg alt=\"BT-304 full-band measurement antenna electrical specifications and supported GNSS constellations table\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-USV-High-Precision-Positioning-Bluetooth-4G-WIFI_37ecbb39-7c13-432e-9ab1-64ea9c358a4d.png?v=1783593766\"\u003e\u003cimg alt=\"Mechanical dimension drawing for BT-304 series antenna with mounting hole layout and thickness callouts\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-USV-High-Precision-Positioning-Bluetooth-4G-WIFI_ccf4dcdd-7516-475b-bb89-21a40ea8a33e.png?v=1783593776\"\u003e\u003cimg alt=\"Feature highlights panel: multi-constellation signal reception, high-quality materials, and stable signal performance\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-USV-High-Precision-Positioning-Bluetooth-4G-WIFI_cbd2c99e-ebba-4cd7-87f0-7d624149935d.png?v=1783593787\"\u003e\u003cp\u003eDesigned for dependable reception on moving platforms, with multi-constellation GNSS support and stable signal performance.\u003c\/p\u003e\n\u003cimg alt=\"Multi-constellation GNSS reception graphic with GPS, BDS, GLONASS and GALILEO icons and antenna render\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-USV-High-Precision-Positioning-Bluetooth-4G-WIFI_22326943-d181-44ca-89dc-7de57bc84135.png?v=1783593797\"\u003e\u003cimg alt=\"Operating voltage 3.3–12.0 V and LNA gain up to 40±2 dB performance highlights for BT-304 series\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-USV-High-Precision-Positioning-Bluetooth-4G-WIFI_2c17e194-90e7-44af-9319-ee2bb5b14aa1.png?v=1783593807\"\u003e\u003cp\u003eWide input voltage and a high-gain LNA help maintain consistent output in demanding installation environments.\u003c\/p\u003e\n\u003cimg alt=\"Connectivity and size panel highlighting 4G and WiFi support plus 128 mm diameter and 23.6 mm height\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-USV-High-Precision-Positioning-Bluetooth-4G-WIFI_65466926-6d42-4daf-8923-13acfb026d45.png?v=1783593816\"\u003e\u003cp\u003eDimensions and connectivity at a glance for planning integration into vehicles, USVs, and other carrier platforms.\u003c\/p\u003e\n\u003cimg alt=\"Connector and internal layout graphic showing MCX ports for GNSS and 4G, plus antenna feedpoints illustration\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-USV-High-Precision-Positioning-Bluetooth-4G-WIFI_6853aaf3-a2aa-435f-b2d9-07df3767fbeb.png?v=1783593825\"\u003e\u003cp\u003eMultiple MCX ports simplify routing separate GNSS, WiFi, and 4G signal paths in compact builds.\u003c\/p\u003e\n\u003cimg alt=\"Comparison chart listing reasons to choose the integrated antenna: stable reception, strict quality control and support\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-USV-High-Precision-Positioning-Bluetooth-4G-WIFI_a010175f-0a4e-4db5-aa5b-d7ab36d50fdb.png?v=1783593835\"\u003e\u003cimg alt=\"Product display renders showing top view and side profile of the BT-304 series antenna housing and base\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-USV-High-Precision-Positioning-Bluetooth-4G-WIFI_41e01bc5-5d08-44a4-b123-8ae72de60d0d.png?v=1783593845\"\u003e\u003cp\u003eLow-profile circular housing supports flexible mounting while keeping the antenna footprint compact.\u003c\/p\u003e\n\u003cimg alt=\"Application scenarios graphic for BT-304 series antenna: intelligent vehicles, container operations, surveying, agriculture\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-USV-High-Precision-Positioning-Bluetooth-4G-WIFI_57366742-0b99-417f-a29f-7335f9adf8be.png?v=1783593853\"\u003e\u003cp\u003eSuitable for navigation, tracking, monitoring, and measurement\/control applications across industrial and mobile use cases.\u003c\/p\u003e\n\u003cimg alt=\"Package contents panel listing BT-304 antenna x1 and customization note\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-USV-High-Precision-Positioning-Bluetooth-4G-WIFI_924a34cd-cf28-4240-bb30-29e24040a81b.png?v=1783593862\"\u003e\u003cp\u003eIncludes the antenna unit (x1); customization options may be available for project requirements.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Beitian","offers":[{"title":"BT-304","offer_id":53340966322400,"sku":"BT-304-1","price":77.74,"currency_code":"USD","in_stock":true},{"title":"BT-304B","offer_id":53340966355168,"sku":"BT-304-2","price":91.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/3210\/3904\/files\/BT-304-E_2d5ffc30-c5c7-42de-8410-0779f94d48e7.png?v=1783568564","url":"https:\/\/rcdrone.top\/tr\/products\/beitian-bt-304b-antenna","provider":"RCDrone","version":"1.0","type":"link"}