{"product_id":"beitian-bt-4n04a-antenna","title":"Beitian BT-4N04A RTK Full-Constellation Full-Band GNSS Reference Station Antenna IP67 for Mapping","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eThe Beitian BT-4N04A is a GNSS base station antenna designed for high-precision RTK reference station use with full-constellation, full-band reception. It supports BDS (BD) B1\/B2\/B3, GPS L1\/L2\/L5, GLONASS G1\/G2, and Galileo E1\/E2\/E5a\/E5b, with a sealed outdoor structure and IP67 waterproof grade for long-term field deployment in mapping and precision agriculture workflows.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFour-system, full-frequency reception: BD B1\/B2\/B3, GPS L1\/L2\/L5, GLONASS G1\/G2, Galileo E1\/E2\/E5a\/E5b\u003c\/li\u003e\n\u003cli\u003eRight-hand circular polarization (RHCP)\u003c\/li\u003e\n\u003cli\u003eLNA gain: 50±2 dB; noise figure: \u0026lt;2 dB\u003c\/li\u003e\n\u003cli\u003eVSWR: ≤2.0; in-band flatness: ±2 dB\u003c\/li\u003e\n\u003cli\u003ePhase center error: ±2 mm; differential delay: ±2 ns\u003c\/li\u003e\n\u003cli\u003eOperating voltage: 3.3V-12V (3.3-12 VDC)\u003c\/li\u003e\n\u003cli\u003eConnector type: TNC-K; output impedance: 50Ω\u003c\/li\u003e\n\u003cli\u003eIP67 waterproof grade\u003c\/li\u003e\n\u003cli\u003eWide beam coverage: bearing 0°-360°, pitch 10°-90°\u003c\/li\u003e\n\u003cli\u003eThreaded mounting: 5\/8\" × 11 (inch) threaded mounting holes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ch3\u003eBT-4N04A\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorking mode\u003c\/td\u003e\n\u003ctd\u003eBD B1\/B2\/B3; GPS L1\/L2\/L5; GLONASS G1\/G2; Galileo E1\/E2\/E5a\/E5b\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency range (MHz)\u003c\/td\u003e\n\u003ctd\u003eBD B1\/B2\/B3; GPS L1\/L2\/L5; GLONASS G1\/G2; Galileo E1\/E2\/E5a\/E5b\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePolarization\u003c\/td\u003e\n\u003ctd\u003eRight-hand circular polarization\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAntenna beam range\u003c\/td\u003e\n\u003ctd\u003eBearing: 0°-360°; Pitch: 10°-90°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGain (dBi)\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAntenna AR (dB)\u003c\/td\u003e\n\u003ctd\u003e≤3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhase center error (mm)\u003c\/td\u003e\n\u003ctd\u003e±2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLNA gain (dB)\u003c\/td\u003e\n\u003ctd\u003e50±2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise figure (dB)\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVSWR\u003c\/td\u003e\n\u003ctd\u003e≤2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIn-band flatness (dB)\u003c\/td\u003e\n\u003ctd\u003e±2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDifferential delay (ns)\u003c\/td\u003e\n\u003ctd\u003e±2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput impedance\u003c\/td\u003e\n\u003ctd\u003e50Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply\/Operating voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V-12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply\/Operating current\u003c\/td\u003e\n\u003ctd\u003e≤50mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector type\u003c\/td\u003e\n\u003ctd\u003eTNC-K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWaterproof grade\u003c\/td\u003e\n\u003ctd\u003eIP67\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eΦ379.5×296.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation method\u003c\/td\u003e\n\u003ctd\u003e5\/8\" × 11 (inch) threaded mounting holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e-45°C ~ +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage temperature\u003c\/td\u003e\n\u003ctd\u003e-55°C ~ +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity\u003c\/td\u003e\n\u003ctd\u003e95% non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eBT-184 (option)\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorking mode\u003c\/td\u003e\n\u003ctd\u003eGPS L1\/L2\/L5; GLONASS L1\/L2\/L3; GALILEO E1\/E5a\/E5b\/E6; BDS B1\/B2\/B3; QZSS L1\/L2\/L5\/L6; IRNSS L5; SBAS L1\/L5; L-Band\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGain\u003c\/td\u003e\n\u003ctd\u003e50±2dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise figure\u003c\/td\u003e\n\u003ctd\u003e≤2 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput VSWR\u003c\/td\u003e\n\u003ctd\u003e≤2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIn-band flatness\u003c\/td\u003e\n\u003ctd\u003e±2dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput impedance\u003c\/td\u003e\n\u003ctd\u003e50Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply voltage\u003c\/td\u003e\n\u003ctd\u003e3.3-12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply current\u003c\/td\u003e\n\u003ctd\u003e≤60mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector type\u003c\/td\u003e\n\u003ctd\u003eTNC-K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eΦ184×144 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e≤2kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation method\u003c\/td\u003e\n\u003ctd\u003e5\/8\" × 11 (inch) threaded mounting holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e-45°C ~ +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage temperature\u003c\/td\u003e\n\u003ctd\u003e-55°C ~ +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLand surveying and mapping\u003c\/li\u003e\n\u003cli\u003eWaterway surveying and mapping\u003c\/li\u003e\n\u003cli\u003ePrecision agriculture\u003c\/li\u003e\n\u003cli\u003eBase station positioning\u003c\/li\u003e\n\u003cli\u003eDeformation monitoring\u003c\/li\u003e\n\u003cli\u003eGeological hazard monitoring\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eNotes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAvailable model options: BT-4N04A and BT-184.\u003c\/li\u003e\n\u003cli\u003eDocumentation referenced: “BT-4N04A GNSS Antenna Datasheet” (Revision: 5.51; Date: 2026.03).\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor pre-sales selection help (BT-4N04A vs BT-184) and integration guidance with GNSS receivers, contact support@rcdrone.top or visit https:\/\/rcdrone.top\/.\u003c\/p\u003e\u003ch2 id=\"details\"\u003eDetails\u003c\/h2\u003e\u003cdiv class=\"details-gallery\"\u003e\n\u003cimg alt=\"Beitian BT-4N04A RTK full-constellation, full-band GNSS reference station antenna for mapping, IP67\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-High-Precision-RTK-Full-Constellation-Full-band-GPS.png?v=1783584878\"\u003e\u003cp\u003eDesigned for RTK base stations, the BT-4N04A supports full-constellation, full-band GNSS reception for stable mapping and surveying work.\u003c\/p\u003e\n\u003cimg alt=\"BT-4N04A GNSS antenna datasheet cover with supplier advantages and revision\/date information\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-High-Precision-RTK-Full-Constellation-Full-band-GPS_9113d42c-c9d7-4044-af48-ae24c5072f49.png?v=1783584888\"\u003e\u003cp\u003eQuick reference to the official BT-4N04A GNSS antenna datasheet for model identification and documentation version control.\u003c\/p\u003e\n\u003cimg alt=\"BT-4N04A electrical specifications table and mechanical dimension drawing (5\/8×11 mounting)\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-High-Precision-RTK-Full-Constellation-Full-band-GPS_2e554319-5c4e-4adf-ac1c-850fca8f75da.png?v=1783584896\"\u003e\u003cp\u003eKey electrical specs and mechanical dimensions help confirm fitment, including the standard 5\/8\" × 11 threaded mounting interface.\u003c\/p\u003e\n\u003cimg alt=\"Graphic comparing common GNSS antenna issues and BT-4N04A multi-use, full-band signal reception benefits\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-High-Precision-RTK-Full-Constellation-Full-band-GPS_def5b452-ab87-4058-9b08-9c502bbff7a2.png?v=1783584906\"\u003e\u003cimg alt=\"Feature highlights for operating voltage, 50±2 dB gain, IP67 waterproof rating, and GNSS constellations supported\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-High-Precision-RTK-Full-Constellation-Full-band-GPS_792fb275-d5b4-488e-9793-1afe52ca8502.png?v=1783584915\"\u003e\u003cp\u003eBuilt for outdoor deployments with IP67 sealing, wide input voltage support, and amplified GNSS signal performance.\u003c\/p\u003e\n\u003cimg alt=\"Side views of Beitian BT-4N04A GNSS base station antenna emphasizing IP67 waterproof outdoor design\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-High-Precision-RTK-Full-Constellation-Full-band-GPS_78eaa8ff-d2e6-4e5b-9360-855e8709e26e.png?v=1783584925\"\u003e\u003cp\u003eThe sealed housing and rugged profile support long-term field installation where dust and heavy rain are expected.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Beitian","offers":[{"title":"BT-4N04A","offer_id":53341067280608,"sku":"BT-4N04A-1","price":1088.88,"currency_code":"USD","in_stock":true},{"title":"BT-184","offer_id":53341067313376,"sku":"BT-4N04A-2","price":588.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/3210\/3904\/files\/BT-380B-S_f0d56a36-de7b-46f6-9fac-940d31d8483e.jpg?v=1783582383","url":"https:\/\/rcdrone.top\/ru\/products\/beitian-bt-4n04a-antenna","provider":"RCDrone","version":"1.0","type":"link"}