{"product_id":"txgb-series-gps-beidou-gnss-antenna-active-sma-j-1575mhz-1561mhz","title":"Ebyte TXGB-AZ-300 \/ TXGB-JKD-20Y GPS BeiDou GNSS Antenna Active SMA-J 1575MHz 1561MHz","description":"\u003cdiv class=\"ebyte-product-description\" style=\"font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; line-height: 1.6; color: #333333; max-width: 1000px; margin: 0 auto;\"\u003e\n\u003cp style=\"font-size: 15px; background-color: #f8f9fa; border-left: 4px solid #0066cc; padding: 12px 16px; margin-bottom: 24px; border-radius: 0 4px 4px 0;\"\u003eThe Ebyte TXGB series is a GPS L1 + BeiDou B1 GNSS antenna pair covering 1575.042±1.023MHz and 1561.098±2.046MHz at 50Ω, comprising the TXGB-AZ-300 active radome antenna (50×38×16.7mm radome, built-in LNA with 28±2dB gain, \u0026lt;1.5dB noise figure, 3m RG174 cable to SMA-J, DC 3~5V \/ ≤15mA) and the TXGB-JKD-20Y 200mm foldable whip with 8dBi gain and integrated active element, both VSWR ≤1.5 for vehicle, fleet and portable positioning terminals.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 20px; color: #111827; border-bottom: 2px solid #e5e7eb; padding-bottom: 8px; margin-top: 32px; margin-bottom: 16px;\"\u003eKey Features \u0026amp; Advantages\u003c\/h2\u003e\n\u003cul style=\"padding-left: 20px; margin-bottom: 24px; font-size: 14px;\"\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eDual-Constellation GPS L1 + BeiDou B1 Coverage:\u003c\/strong\u003e Both models operate on 1575.042±1.023MHz (GPS L1 \/ Galileo E1 \/ QZSS) and 1561.098±2.046MHz (BeiDou B1) with \u0026gt;10MHz antenna bandwidth per band, so GNSS receivers can lock satellites from two constellations simultaneously for faster fix and better availability under urban canyon conditions.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eBuilt-in Low-Noise Amplifier (LNA):\u003c\/strong\u003e The TXGB-AZ-300 integrates an LNA offering 28±2dB gain (excluding feeder), \u0026lt;1.5dB noise figure, ±1.0dB in-band flatness and 35dBc min out-of-band rejection at F0±100MHz — this compensates the 3m RG174 cable loss and preserves receiver sensitivity over long internal runs.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eRight-Hand Circular Polarization (AZ-300):\u003c\/strong\u003e GNSS downlinks are RHCP; the AZ-300 matches that polarization to reject ground-reflected and multipath energy, which is why a flat radome antenna mounted top-up outperforms a vertical whip for accurate positioning.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eFoldable Whip for Steerable \/ Mobile Use:\u003c\/strong\u003e The TXGB-JKD-20Y provides 8dBi gain in a 200mm TPEE whip with an integrated active element and SMA-J rotary joint — convenient when the antenna must be folded for transport, angled, or mounted on a small enclosure with limited headroom.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eStandard SMA-J Interface, 50Ω Matched:\u003c\/strong\u003e Both antennas terminate in SMA-J (male thread, pin) to plug straight into GNSS modules, vehicle terminals and data loggers; VSWR ≤1.5 keeps reflection loss low at both centre frequencies.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eLow Active-Bias Budget:\u003c\/strong\u003e The AZ-300 draws ≤15mA at DC 3.3V (rated 3~5V), which most GNSS modules already supply through the RF line as a bias tee; no extra power wiring is required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"font-size: 20px; color: #111827; border-bottom: 2px solid #e5e7eb; padding-bottom: 8px; margin-top: 32px; margin-bottom: 16px;\"\u003eCore Specifications\u003c\/h2\u003e\n\u003cp style=\"font-size: 13px; color: #57606a; margin-bottom: 10px;\"\u003eSpecifications compiled from the official Ebyte per-model spec tables. Note: the \"28\" figure for TXGB-AZ-300 is LNA amplifier gain in dB (28±2dB, excluding feeder), not passive antenna dBi gain.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 24px;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 12px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f3f4f6;\"\u003e\n\u003cth style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eTXGB-AZ-300 (Active Mount)\u003c\/th\u003e\n\u003cth style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eTXGB-JKD-20Y (Foldable Whip)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eAntenna type\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eGPS \/ BeiDou positioning antenna, black radome puck for external mounting\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eFoldable omnidirectional rubber whip, black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eFrequency range\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e1575.042±1.023MHz (GPS L1) \u0026amp; 1561.098±2.046MHz (BeiDou B1)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e1575.042±1.023MHz \u0026amp; 1561.098±2.046MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eAntenna bandwidth\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eGPS-L1 \u0026gt;10MHz; BD-B1 \u0026gt;10MHz\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eGPS-L1 \u0026gt;10MHz; BD-B1 \u0026gt;10MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eGain\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eLNA gain 28±2dB (excluding feeder)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e8dBi antenna gain; 20dB LNA gain (excluding feeder)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eNoise figure\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eIn-band gain flatness\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eOut-of-band rejection\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e35dBc min at F0±100MHz\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eVoltage standing wave ratio\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\" max=\"\"\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003ePolarization\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eRight-hand circular (RHCP)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eVertical (linear)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eInput impedance\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e50Ω\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e50Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003ePower handling\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e20W\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e20W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eDC supply (active)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eDC 3~5V, ≤15mA at DC 3.3V\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eDC 3~5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eDimensions\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e50×38×16.7mm radome\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e200mm overall length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eFeeder\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eRG174, 3m\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eTPEE jacket, no separate feeder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e61g (61±2g)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e22g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eConnector\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eSMA-J (male thread, pin)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eSMA-J (male thread, pin)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eOperating \/ storage temperature\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e-30°C ~ +75°C\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003e-40°C ~ +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"font-size: 20px; color: #111827; border-bottom: 2px solid #e5e7eb; padding-bottom: 8px; margin-top: 32px; margin-bottom: 16px;\"\u003eProduct Selection Guide\u003c\/h2\u003e\n\u003cp style=\"font-size: 14px; color: #c53030; font-weight: bold; margin-bottom: 12px;\"\u003eSelection Notice: These are receive-only GNSS positioning antennas for the GPS L1 (1575.42MHz) and BeiDou B1 (1561.098MHz) broadcast bands — they are not for Sub-1GHz \/ 2.4GHz \/ 4G data links, and no transmit licensing applies. For best accuracy choose the RHCP flat radome AZ-300 with a clear view of the sky (roof, dashboard, mast top); choose the foldable JKD-20Y when space, headroom or repeated folding\/transport dominates. Both are active antennas — verify your receiver board can supply the DC bias (3~5V) on the RF line, otherwise add an external bias tee.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 32px;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 13px; text-align: center;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #0066cc; color: #ffffff;\"\u003e\n\u003cth style=\"padding: 9px 10px; border: 1px solid #0055aa;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding: 9px 10px; border: 1px solid #0055aa;\"\u003eForm Factor\u003c\/th\u003e\n\u003cth style=\"padding: 9px 10px; border: 1px solid #0055aa;\"\u003eGain\u003c\/th\u003e\n\u003cth style=\"padding: 9px 10px; border: 1px solid #0055aa;\"\u003ePolarization\u003c\/th\u003e\n\u003cth style=\"padding: 9px 10px; border: 1px solid #0055aa;\"\u003eCable \/ Mount\u003c\/th\u003e\n\u003cth style=\"padding: 9px 10px; border: 1px solid #0055aa;\"\u003eBest For\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; font-weight: 600; color: #0066cc;\"\u003eTXGB-AZ-300\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb;\"\u003e50×38×16.7mm black radome puck\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb;\"\u003e28±2dB LNA\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb;\"\u003eRHCP\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb;\"\u003e3m RG174 + SMA-J; external mount\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb;\"\u003eVehicle \u0026amp; fleet GPS\/BeiDou terminals, navigation, dashcams, long cable runs inside metal bodies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9fafb;\"\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb; font-weight: 600; color: #0066cc;\"\u003eTXGB-JKD-20Y\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb;\"\u003e200mm foldable rubber whip (22g)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb;\"\u003e8dBi \/ 20dB LNA\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb;\"\u003eVertical linear\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb;\"\u003eDirect SMA-J rotary joint\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border: 1px solid #e5e7eb;\"\u003ePortable trackers, drones, outdoor positioning terminals, equipment needing a steerable or foldable antenna\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ebyte-detail-images\" style=\"margin: 32px 0;\"\u003e\n\u003cp style=\"text-align: center; margin: 0 0 8px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/5911\/1885\/files\/1_77deefb1-e8fc-4b6d-bf91-cbf63487edf6.jpg?v=1794374299\" alt=\"Ebyte TXGB GPS BeiDou GNSS Antenna Detail 1\" style=\"display: block; width: 100%; max-width: 850px; height: auto; margin: 0 auto; border-radius: 4px;\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center; margin: 0 0 8px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/5911\/1885\/files\/2_ca199c36-5f78-4764-b5ca-d28159ce8fb4.jpg?v=1794374299\" alt=\"Ebyte TXGB GPS BeiDou GNSS Antenna Detail 2\" style=\"display: block; width: 100%; max-width: 850px; height: auto; margin: 0 auto; border-radius: 4px;\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center; margin: 0 0 8px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/5911\/1885\/files\/3_fcc2fd0a-7e4e-444e-a6e2-9ecdc62441a2.jpg?v=1794374299\" alt=\"Ebyte TXGB GPS BeiDou GNSS Antenna Detail 3\" style=\"display: block; width: 100%; max-width: 850px; height: auto; margin: 0 auto; border-radius: 4px;\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center; margin: 0 0 8px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/5911\/1885\/files\/4_f1f9d3ad-c615-4b07-b057-5c9e20c8337e.jpg?v=1794374299\" alt=\"Ebyte TXGB GPS BeiDou GNSS Antenna Detail 4\" style=\"display: block; width: 100%; max-width: 850px; height: auto; margin: 0 auto; border-radius: 4px;\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center; margin: 0 0 8px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/5911\/1885\/files\/5_dd7676aa-d3e7-4fba-9cf2-e5e4aa92b343.jpg?v=1794374299\" alt=\"Ebyte TXGB GPS BeiDou GNSS Antenna Detail 5\" style=\"display: block; width: 100%; max-width: 850px; height: auto; margin: 0 auto; border-radius: 4px;\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center; margin: 0 0 8px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/5911\/1885\/files\/6_9777cc74-5410-4a62-a72d-3ac385616163.jpg?v=1794374299\" alt=\"Ebyte TXGB GPS BeiDou GNSS Antenna Detail 6\" style=\"display: block; width: 100%; max-width: 850px; height: auto; margin: 0 auto; border-radius: 4px;\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center; margin: 0 0 8px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/5911\/1885\/files\/7_f2849601-059b-41cb-8a13-79d2e6483438.jpg?v=1794374299\" alt=\"Ebyte TXGB GPS BeiDou GNSS Antenna Detail 7\" style=\"display: block; width: 100%; max-width: 850px; height: auto; margin: 0 auto; border-radius: 4px;\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center; margin: 0 0 8px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/5911\/1885\/files\/8_7b70cfb8-7d8d-43b6-8a9d-0ac4b66f9732.jpg?v=1794374299\" alt=\"Ebyte TXGB GPS BeiDou GNSS Antenna Detail 8\" style=\"display: block; width: 100%; max-width: 850px; height: auto; margin: 0 auto; border-radius: 4px;\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center; margin: 0 0 8px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/5911\/1885\/files\/9_197b8a2c-a34d-4144-bb5c-c7537bb6d8ed.jpg?v=1794374299\" alt=\"Ebyte TXGB GPS BeiDou GNSS Antenna Detail 9\" style=\"display: block; width: 100%; max-width: 850px; height: auto; margin: 0 auto; border-radius: 4px;\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"font-size: 20px; color: #111827; border-bottom: 2px solid #e5e7eb; padding-bottom: 8px; margin-top: 32px; margin-bottom: 16px;\"\u003eIndustrial Installation \u0026amp; Wiring\u003c\/h2\u003e\n\u003cdiv style=\"font-size: 14px; margin-bottom: 24px;\"\u003e\n\u003cp\u003e\u003cstrong\u003e1. Sky view first:\u003c\/strong\u003e GNSS performance is set by line-of-sight. Mount the AZ-300 flat, marking-side-up, on a horizontal surface with an unobstructed view above roughly 15° elevation. Keep it at least 20~30cm away from other antennas, metal rails, inverters and DC-DC converters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. Metal roofs and enclosures:\u003c\/strong\u003e A puck antenna mounted directly on a conductive surface works as intended (the roof acts as ground plane). Inside a fully metal cabin or behind a heat-insulating \/ metallised windscreen, satellite signal is attenuated — relocate externally or use the JKD-20Y whip outside the enclosure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. RF connection:\u003c\/strong\u003e Both antennas terminate in SMA-J (male thread, pin); screw onto the receiver's SMA-K (female thread, jack) RF pad by hand plus a light quarter turn. Do not lever or over-torque a module's SMA island — it will crack the solder joints.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. DC bias for the active antenna:\u003c\/strong\u003e The AZ-300 needs DC 3~5V (≤15mA at 3.3V) on the centre conductor. Most GNSS receiver boards provide this through a bias tee; if yours does not, insert an external 3~5V bias tee between antenna and receiver, otherwise the internal LNA stays off and sensitivity drops by roughly the cable loss.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5. Cable management:\u003c\/strong\u003e Route the 3m RG174 away from motor power leads, VFD output cables and switching supplies; if it must cross them, cross at 90°. Do not coil surplus cable into a tight loop near the receiver input.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"font-size: 20px; color: #111827; border-bottom: 2px solid #e5e7eb; padding-bottom: 8px; margin-top: 32px; margin-bottom: 16px;\"\u003ePractical Application Scenarios\u003c\/h2\u003e\n\u003cdiv style=\"font-size: 14px; margin-bottom: 24px;\"\u003e\n\u003ch3 style=\"font-size: 16px; color: #1f2937; margin-top: 16px; margin-bottom: 6px;\"\u003e1. Fleet, Taxi and Bus Positioning \/ Passive Announcements\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 12px;\"\u003eExternally mounted AZ-300 pucks feed GPS+BeiDou fixes to on-board 4G\/GNSS terminals in taxis, buses and driving-school vehicles, supporting mileage logging, geofencing, and stop-announcement triggers even when the receiver box sits deep inside the metal body — the LNA offsets the 3m feeder loss.\u003c\/p\u003e\n\u003ch3 style=\"font-size: 16px; color: #1f2937; margin-top: 16px; margin-bottom: 6px;\"\u003e2. After-Market Vehicle Navigation, Dashcams and Teardown-Safe Retrofit\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 12px;\"\u003eDVD navigation units, telematics dongles and repair-shop diagnostic tools use the radome antenna behind a dashboard or on a windshield; the foldable whip variant suits plug-and-play retrofits where no drilling is allowed.\u003c\/p\u003e\n\u003ch3 style=\"font-size: 16px; color: #1f2937; margin-top: 16px; margin-bottom: 6px;\"\u003e3. Drones, Robotics and Portable Field Terminals\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 12px;\"\u003eThe 22g foldable JKD-20Y keeps weight and stowage volume minimal on UAVs, survey poles, handheld data collectors and asset trackers, and can be angled toward the sky when the mounting orientation is constrained.\u003c\/p\u003e\n\u003ch3 style=\"font-size: 16px; color: #1f2937; margin-top: 16px; margin-bottom: 6px;\"\u003e4. IoT Time-Synchronisation and Asset Tracking Nodes\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 12px;\"\u003eSub-1GHz DTUs, LoRa nodes and RTU gateways frequently need GNSS-derived timestamps and location stamps; the compact active puck provides both to the receiver section of combined module boards over a single coax with bias.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"font-size: 20px; color: #111827; border-bottom: 2px solid #e5e7eb; padding-bottom: 8px; margin-top: 32px; margin-bottom: 16px;\"\u003eFAQ Section\u003c\/h2\u003e\n\u003cdiv style=\"font-size: 14px; margin-bottom: 24px;\"\u003e\n\u003ch3 style=\"font-size: 15px; color: #1f2937; margin-top: 14px; margin-bottom: 6px;\"\u003eQ1: Is the 28dBi figure passive antenna gain or LNA gain?\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 12px;\"\u003eIt is LNA (amplifier) gain: the official spec table lists \"Gain (excluding feeder) 28±2dB\" under the LNA characteristics block, together with noise figure \u0026lt;1.5dB and ±1.0dB in-band flatness. Passive ceramic patch antennas of this size typically provide only a few dBi of gain; the 28dB number describes the amplifier that restores signal after cable loss and receiver front-end insertion loss.\u003c\/p\u003e\n\u003ch3 style=\"font-size: 15px; color: #1f2937; margin-top: 14px; margin-bottom: 6px;\"\u003eQ2: Will these antennas work for GLONASS, Galileo or BeiDou B2\/B3?\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 12px;\"\u003eThe published pass bands are GPS L1 1575.042±1.023MHz and BeiDou B1 1561.098±2.046MHz. Galileo E1 shares the 1575.42MHz band, so E1 reception is generally possible; GLONASS G1 (around 1602MHz) and BeiDou B2\/B3 lie outside the specified bandwidth. For multi-constellation, multi-band receivers select a dedicated multi-band antenna.\u003c\/p\u003e\n\u003ch3 style=\"font-size: 15px; color: #1f2937; margin-top: 14px; margin-bottom: 6px;\"\u003eQ3: My receiver already has a patch antenna — what does adding this active antenna improve?\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 12px;\"\u003eNothing, unless the antenna sits far from the receiver. Active antennas are chosen precisely to move the radiating element to the best sky position while the receiver stays inside a metal enclosure: without the LNA, 3m of RG174 plus connector loss can cost several dB of link margin and lengthen cold starts.\u003c\/p\u003e\n\u003ch3 style=\"font-size: 15px; color: #1f2937; margin-top: 14px; margin-bottom: 6px;\"\u003eQ4: The receiver does not output bias voltage — can the antenna still be used?\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 12px;\"\u003eYes, with an in-line bias tee injecting DC 3~5V onto the coax centre conductor, keeping within the ≤15mA budget at 3.3V. Do not exceed 5V. If no bias is applied at all, the LNA is unpowered and the assembly behaves as a passive antenna with cable loss.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Ebyte Official Store - IoT Module Manufacturer","offers":[{"title":"TXGB-AZ-300 (Active GPS\/BeiDou Radome, 28dB LNA, 3m RG174, SMA-J)","offer_id":48855126376653,"sku":"TXGB-AZ-300","price":2.93,"currency_code":"USD","in_stock":true},{"title":"TXGB-JKD-20Y (Foldable GPS\/BeiDou Whip, 8dBi, 200mm, SMA-J)","offer_id":48855126409421,"sku":"TXGB-JKD-20Y","price":2.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0615\/5911\/1885\/files\/3034a1133efe01daba919094b70c6310_e7734e74-a96f-47e2-b907-a3ec5abe00df.jpg?v=1794374359","url":"https:\/\/ebyteiot.com\/zh\/products\/txgb-series-gps-beidou-gnss-antenna-active-sma-j-1575mhz-1561mhz","provider":"Ebyte Official Store - IoT Module Manufacturer","version":"1.0","type":"link"}