{"product_id":"beitian-bt-t338-antenna","title":"Beitian BT-T338 Ultra-Compact GNSS Helical Antenna SMA-J for Surveying\/RTK, GPS L1 GLONASS G1 BDS B1 E1","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eThe Beitian BT-T338 is an ultra-compact GNSS helical antenna for handheld surveying instruments and other space- and weight-constrained positioning equipment. It supports multiple satellite signals (GPS L1, GLONASS G1, BDS B1, GALILEO E1) and uses right-handed circular polarization to help maintain stable reception, including at low elevation angles.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMulti-constellation support: GPS L1 \/ GLONASS G1 \/ BDS B1 \/ GALILEO E1\u003c\/li\u003e\n\u003cli\u003eRight-handed circular polarization (RHCP)\u003c\/li\u003e\n\u003cli\u003eHigh gain and low VSWR design; stable signal (as stated by manufacturer materials)\u003c\/li\u003e\n\u003cli\u003eSmall size and lightweight\u003c\/li\u003e\n\u003cli\u003eWaterproof and dustproof design (no IP rating specified)\u003c\/li\u003e\n\u003cli\u003eSMA-J interface\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eBT-T338\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported satellite signals \/ working mode\u003c\/td\u003e\n\u003ctd\u003eGPS L1; GLONASS G1; BDS B1; GALILEO E1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePolarization mode\u003c\/td\u003e\n\u003ctd\u003eRight-handed circular polarization\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput interface \/ connector \/ interface form\u003c\/td\u003e\n\u003ctd\u003eSMA-J\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating voltage \/ supply voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating current \/ supply\u003c\/td\u003e\n\u003ctd\u003e≤30mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow noise amplification gain\u003c\/td\u003e\n\u003ctd\u003e26±2dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGain\u003c\/td\u003e\n\u003ctd\u003e-1dBi\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≤2.0:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAntenna axial ratio\u003c\/td\u003e\n\u003ctd\u003e≤3dB\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\u003eHorizontal plane coverage angle\u003c\/td\u003e\n\u003ctd\u003e360°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e-40°C to +80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage temperature\u003c\/td\u003e\n\u003ctd\u003e-45°C to +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\u003ctr\u003e\n\u003ctd\u003eAntenna size \/ dimensions\u003c\/td\u003e\n\u003ctd\u003eΦ13mm*33.7mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdditional diameters (structure diagram)\u003c\/td\u003e\n\u003ctd\u003eSmall end: Φ10.5mm; large end: Φ13mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e≤11g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eWhat's Included\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Beitian BT-T338 antenna\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eUAV positioning\u003c\/li\u003e\n\u003cli\u003eAgriculture\u003c\/li\u003e\n\u003cli\u003eHand-held positioning devices\u003c\/li\u003e\n\u003cli\u003ePortable devices such as sub-meter handhelds\/tablets\u003c\/li\u003e\n\u003cli\u003eSpace- and weight-limited GNSS\/RTK setups (including micro RTKs)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor selection or integration support for the BT-T338 model, 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-T338 GNSS helical antenna with key specs table: SMA-J, 3.3V, ≤30mA, 13×33.7mm\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-RTK-Ultra-compact-For-Handheld-Surveying-Instrument.png?v=1783598680\"\u003e\u003cp\u003eBuilt for compact GNSS\/RTK integrations, BT‑T338 combines RHCP reception with an SMA‑J interface in a lightweight housing.\u003c\/p\u003e\n\u003cimg alt=\"Beitian GNSS helical antennas product banner with BT-T338 close-up and SMA-J connector end\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-RTK-Ultra-compact-For-Handheld-Surveying-Instrument_f3783129-90d5-44b6-a2d5-8e98e0b8f5f7.png?v=1783598690\"\u003e\u003cp\u003eA compact helical antenna option for space‑ and weight‑constrained devices such as micro RTKs and portable GNSS equipment.\u003c\/p\u003e\n\u003cimg alt=\"BT-T338 product parameters graphic listing supported signals, RHCP polarization, size, VSWR and temperature range\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-RTK-Ultra-compact-For-Handheld-Surveying-Instrument_3e02091f-8723-436c-af44-4f47b74c74c6.png?v=1783598699\"\u003e\u003cp\u003eMulti‑constellation support covers GPS L1, GLONASS G1, BDS B1, and GALILEO E1 for flexible field deployments.\u003c\/p\u003e\n\u003cimg alt=\"BT-T338 technical parameter table: gain, noise figure, VSWR, voltage\/current, size, humidity, SMA-J interface\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-RTK-Ultra-compact-For-Handheld-Surveying-Instrument_5ed7b956-757e-44e3-9ab0-4b46227433ca.png?v=1783598708\"\u003e\u003cp\u003eTechnical parameters at a glance for integration and power planning, including 3.3V supply and low current draw.\u003c\/p\u003e\n\u003cimg alt=\"BT-T338 structure schematic with dimensions 33.7mm length, 13mm diameter, and SMA-J connector detail\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-RTK-Ultra-compact-For-Handheld-Surveying-Instrument_df9ba36b-999b-4dd9-94f7-6aed9a9aeb6d.png?v=1783598724\"\u003e\u003cp\u003eUltra‑compact form factor at Φ13 mm × 33.7 mm, with an SMA‑J connector for straightforward installs.\u003c\/p\u003e\n\u003cimg alt=\"BT-T338 feature collage: GPS\/GLONASS\/BDS\/Galileo bands, lightweight size, dustproof\/waterproof claims, details\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-RTK-Ultra-compact-For-Handheld-Surveying-Instrument_e0536a5f-9ad9-48b8-9c83-b6a6c4ed7ebc.png?v=1783598734\"\u003e\u003cp\u003eCompact, lightweight construction with manufacturer-stated dustproof and waterproof design for outdoor use.\u003c\/p\u003e\n\u003cimg alt=\"Application scenarios graphic for BT-T338 GNSS antenna: UAV positioning and agriculture drone field use\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-RTK-Ultra-compact-For-Handheld-Surveying-Instrument_24f6e4cb-451d-4b43-960e-15a33a342486.png?v=1783598747\"\u003e\u003cp\u003eSuitable for UAV positioning and precision agriculture workflows where small, reliable GNSS antennas are needed.\u003c\/p\u003e\n\u003cimg alt=\"Packaging\/product list graphic with single BT-T338 antenna and handheld positioning device application\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/Beitian-RTK-Ultra-compact-For-Handheld-Surveying-Instrument_45f46f6a-fd7c-4655-87ad-e848e4741921.png?v=1783598757\"\u003e\u003cp\u003eWhat’s included: 1 × Beitian BT‑T338 GNSS helical antenna.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Beitian","offers":[{"title":"BT-T338","offer_id":53340911730912,"sku":"BT-T338-1","price":38.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/3210\/3904\/files\/1._-E_30cc92ca-851a-4af3-ba13-ac5240fdc04e.png?v=1783565561","url":"https:\/\/rcdrone.top\/es\/products\/beitian-bt-t338-antenna","provider":"RCDrone","version":"1.0","type":"link"}