{"product_id":"beitian-bt-3b45ajl2-antenna","title":"Beitian BT-3B45AJL2\/BT-3B45AJL5 Magnetic GNSS RTK Active Antenna for Automotive (ANN-MB-00)","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eThe Beitian BT-3B45AJL2 \/ BT-3B45AJL5 is a magnetic GNSS RTK active antenna designed for automotive and external measurement installations. It supports multi-constellation reception (GPS\/GLONASS\/Galileo\/BeiDou) with right-hand circular polarization (RHCP), 50 ohm impedance, and an integrated magnetic bottom for fast mounting.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eModels available: BT-3B45AJL2 or BT-3B45AJL5\u003c\/li\u003e\n\u003cli\u003eMagnetic base; compact size and lightweight (235 g)\u003c\/li\u003e\n\u003cli\u003eRight-hand circular polarization (RHCP)\u003c\/li\u003e\n\u003cli\u003eLNA gain: 38 +\/- 2 dB\u003c\/li\u003e\n\u003cli\u003eVSWR: \u0026lt;= 2.0\u003c\/li\u003e\n\u003cli\u003eOperating voltage: 3.3-12.0 V (also shown as 3.3-12 V)\u003c\/li\u003e\n\u003cli\u003eHorizontal coverage angle: 360 degrees\u003c\/li\u003e\n\u003cli\u003eHousing notes from product materials: matte waterproof casing; dustproof protection; scratch-resistant and non-slip matte material\u003c\/li\u003e\n\u003cli\u003eMagnet notes from product materials: neodymium iron boron strong magnet \/ “super magnet”\u003c\/li\u003e\n\u003cli\u003eMounting notes from product materials: M5 mounting holes (2 holes shown)\u003c\/li\u003e\n\u003cli\u003e“Optional Buff” (wording from product materials): balancing signal strength for long-distance transmission and stability for short-range coverage\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ch3\u003eModel \/ Signal Support\u003c\/h3\u003e\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eBT-3B45AJL2\u003c\/th\u003e\n\u003cth\u003eBT-3B45AJL5\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003eSupported signals (as listed)\u003c\/td\u003e\n\u003ctd\u003e\n        GPS: L1\/L2\/L5\u003cbr\u003e\n        GLONASS: L1\/L2\u003cbr\u003e\n        BDS: B1I\/B2I\/B2b\u003cbr\u003e\n        Galileo: E1\/E5b\n      \u003c\/td\u003e\n\u003ctd\u003e\n        GPS: L1, L1C, L5C\u003cbr\u003e\n        BDS: B1I, B1C, B2a\u003cbr\u003e\n        Galileo: E1, E5a\u003cbr\u003e\n        QZSS: L5\u003cbr\u003e\n        IRNSS: S-L5\n      \u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eAntenna \/ Electrical \/ Mechanical\u003c\/h3\u003e\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\u003ctbody\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\u003ePort impedance\u003c\/td\u003e\n\u003ctd\u003e50 ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGain (dBi)\u003c\/td\u003e\n\u003ctd\u003e2 (also listed as \u0026gt;= 2.0)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAntenna AR (dB)\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;= 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\u003e38 +\/- 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\u0026lt;= 2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating voltage (V)\u003c\/td\u003e\n\u003ctd\u003e3.3-12.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating current (mA)\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;= 45\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector type\u003c\/td\u003e\n\u003ctd\u003eSMA-J \/ TNC-J (both shown in product materials)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable\u003c\/td\u003e\n\u003ctd\u003eRG174\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable length\u003c\/td\u003e\n\u003ctd\u003e5 m (also shown as 5000 +\/- 100 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAntenna size (mm)\u003c\/td\u003e\n\u003ctd\u003e100 * 68 * 24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (g)\u003c\/td\u003e\n\u003ctd\u003e235\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eMagnetic bottom\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating temperature (C)\u003c\/td\u003e\n\u003ctd\u003e-40 to +85\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage temperature (C)\u003c\/td\u003e\n\u003ctd\u003e-55 to +85\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eDimension Drawing Notes (mm)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOverall: 100.00\u003c\/li\u003e\n\u003cli\u003eInner dimensions shown: 82.00 +\/- 0.1; 68.00 +\/- 0.2\u003c\/li\u003e\n\u003cli\u003eThickness: 24.00 +\/- 0.3\u003c\/li\u003e\n\u003cli\u003eSide height shown: 61.20\u003c\/li\u003e\n\u003cli\u003eMounting holes: 2 x M5\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAutomotive GNSS\/RTK installations with magnetic mounting\u003c\/li\u003e\n\u003cli\u003eGeodetic surveying, hydrographic surveying, and precision agriculture (as stated in product materials)\u003c\/li\u003e\n\u003cli\u003eSurveying and mapping\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor integration questions (connector selection, installation, or matching to a GNSS receiver), contact support at https:\/\/rcdrone.top\/ or email support@rcdrone.top.\u003c\/p\u003e\u003ch2\u003eWhat's Included\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x GNSS RTK active antenna (model selected: BT-3B45AJL2 or BT-3B45AJL5)\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eNote: Some product materials also show a “Positioning Board GPS Beidou BT-902G1” as part of a separate module package; it is not indicated as included with the model-only selection.\u003c\/p\u003e\u003ch2 id=\"details\"\u003eDetails\u003c\/h2\u003e\u003cdiv class=\"details-gallery\"\u003e\n\u003cimg alt=\"Beitian BT-3B45AJL2\/BT-3B45AJL5 magnetic GNSS RTK active antenna overview with key specs\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-Magnetic-L1L2L5-GPS-GLONASS-Galileo-BeiDou.png?v=1783586719\"\u003e\u003cp\u003eBuilt for vehicle and outdoor installs, the BT-3B45AJL2\/BT-3B45AJL5 combines a compact magnetic mount with multi-constellation GNSS\/RTK reception.\u003c\/p\u003e\n\u003cimg alt=\"BT-3B45AJL2\/BT-3B45AJL5 specifications table and dimension drawing with mounting hole layout\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-Magnetic-L1L2L5-GPS-GLONASS-Galileo-BeiDou_b2942bf8-27d0-43b6-ae90-55ccd2410ab0.png?v=1783586728\"\u003e\u003cp\u003eFull electrical and mechanical specifications are provided, including operating voltage range, cable length, and mounting dimensions for integration planning.\u003c\/p\u003e\n\u003cimg alt=\"Multi-frequency GNSS bands comparison graphic addressing positioning accuracy and signal stability\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-Magnetic-L1L2L5-GPS-GLONASS-Galileo-BeiDou_a22e5bae-c866-47be-a6ed-f4802d284d54.png?v=1783586745\"\u003e\u003cimg alt=\"GPS, GLONASS, BeiDou and Galileo support graphic with 360° coverage and antenna views\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-Magnetic-L1L2L5-GPS-GLONASS-Galileo-BeiDou_32c95d83-db07-4197-98c4-2269e73d13da.png?v=1783586757\"\u003e\u003cp\u003eMulti-constellation tracking (GPS\/GLONASS\/Galileo\/BeiDou) and 360° coverage help maintain reliable positioning in demanding environments.\u003c\/p\u003e\n\u003cimg alt=\"Operating voltage 3.3–12V graphic and gain callout for the active GNSS antenna LNA\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-Magnetic-L1L2L5-GPS-GLONASS-Galileo-BeiDou_03712fbe-ea54-497d-841f-765536ace595.png?v=1783586765\"\u003e\u003cimg alt=\"BT-3B45AJL2 exploded view highlighting waterproof case, built-in module, and neodymium magnet base\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-Magnetic-L1L2L5-GPS-GLONASS-Galileo-BeiDou_c5775b61-9dc6-4de1-8b82-4c207c9c5bec.png?v=1783586783\"\u003e\u003cp\u003eA matte, waterproof housing and strong neodymium magnet base support quick placement on metal surfaces.\u003c\/p\u003e\n\u003cimg alt=\"RG174 coax cable with TNC-J and SMA-J connector options plus 100×68×24 mm size callouts\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-Magnetic-L1L2L5-GPS-GLONASS-Galileo-BeiDou_57c2cbb6-0d32-40d5-9c1d-489ff8520fb9.png?v=1783586792\"\u003e\u003cp\u003eChoose the connector style that matches your receiver (SMA-J or TNC-J), with an included RG174 cable for flexible routing.\u003c\/p\u003e\n\u003cimg alt=\"GNSS gain test example chart and comparison panel for quality control and product advantages\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-Magnetic-L1L2L5-GPS-GLONASS-Galileo-BeiDou_65de51d8-0697-4cd8-aab0-324384bab0ed.png?v=1783586805\"\u003e\u003cimg alt=\"Automotive roof magnetic mounting example and application scenarios like surveying and precision agriculture\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-Magnetic-L1L2L5-GPS-GLONASS-Galileo-BeiDou_de562f42-cb80-450d-a42c-e355b158177c.png?v=1783586817\"\u003e\u003cp\u003eCommon uses include automotive GNSS installs, surveying and mapping, power inspection workflows, and precision agriculture.\u003c\/p\u003e\n\u003cimg alt=\"Package list graphic showing BT-3B45AJL2 antenna kit options and a compatible positioning board bundle\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-Magnetic-L1L2L5-GPS-GLONASS-Galileo-BeiDou_ee809c07-0f62-4e80-9d9b-40c34b0d56a2.png?v=1783586825\"\u003e\n\u003c\/div\u003e","brand":"Beitian","offers":[{"title":"BT-3B45AJL2","offer_id":53341044801760,"sku":"Beitian_Magne_0ff0ca-1","price":59.54,"currency_code":"USD","in_stock":true},{"title":"BT-3B45AJL5","offer_id":53341044834528,"sku":"Beitian_Magne_0ff0ca-2","price":59.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/3210\/3904\/files\/1._-E_e5547209-4682-4930-93f4-142590a6bf53.png?v=1783582059","url":"https:\/\/rcdrone.top\/ja\/products\/beitian-bt-3b45ajl2-antenna","provider":"RCDrone","version":"1.0","type":"link"}