Beitian BT-T338 Ultra-Compact GNSS Helical Antenna SMA-J for Surveying/RTK, GPS L1 GLONASS G1 BDS B1 E1

Beitian

$38.64 USD

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Model BT-T338

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Overview

The 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.

Key Features

Multi-constellation support: GPS L1 / GLONASS G1 / BDS B1 / GALILEO E1
Right-handed circular polarization (RHCP)
High gain and low VSWR design; stable signal (as stated by manufacturer materials)
Small size and lightweight
Waterproof and dustproof design (no IP rating specified)
SMA-J interface

Specifications

Model	BT-T338
Supported satellite signals / working mode	GPS L1; GLONASS G1; BDS B1; GALILEO E1
Polarization mode	Right-handed circular polarization
Output interface / connector / interface form	SMA-J
Operating voltage / supply voltage	3.3V
Operating current / supply	≤30mA
Low noise amplification gain	26±2dB
Gain	-1dBi
Noise figure	≤2 dB
Output VSWR	≤2.0:1
Antenna axial ratio	≤3dB
In-band flatness	±2dB
Horizontal plane coverage angle	360°
Operating temperature	-40°C to +80°C
Storage temperature	-45°C to +85°C
Humidity	95% non-condensing
Antenna size / dimensions	Φ13mm*33.7mm
Additional diameters (structure diagram)	Small end: Φ10.5mm; large end: Φ13mm
Weight	≤11g

What's Included

1 x Beitian BT-T338 antenna

Applications

UAV positioning
Agriculture
Hand-held positioning devices
Portable devices such as sub-meter handhelds/tablets
Space- and weight-limited GNSS/RTK setups (including micro RTKs)

For selection or integration support for the BT-T338 model, contact [email protected] or visit https://rcdrone.top/.

Details

Beitian BT-T338 GNSS helical antenna with key specs table: SMA-J, 3.3V, ≤30mA, 13×33.7mm

Built for compact GNSS/RTK integrations, BT‑T338 combines RHCP reception with an SMA‑J interface in a lightweight housing.

Beitian GNSS helical antennas product banner with BT-T338 close-up and SMA-J connector end

A compact helical antenna option for space‑ and weight‑constrained devices such as micro RTKs and portable GNSS equipment.

BT-T338 product parameters graphic listing supported signals, RHCP polarization, size, VSWR and temperature range

Multi‑constellation support covers GPS L1, GLONASS G1, BDS B1, and GALILEO E1 for flexible field deployments.

BT-T338 technical parameter table: gain, noise figure, VSWR, voltage/current, size, humidity, SMA-J interface

Technical parameters at a glance for integration and power planning, including 3.3V supply and low current draw.

BT-T338 structure schematic with dimensions 33.7mm length, 13mm diameter, and SMA-J connector detail

Ultra‑compact form factor at Φ13 mm × 33.7 mm, with an SMA‑J connector for straightforward installs.

BT-T338 feature collage: GPS/GLONASS/BDS/Galileo bands, lightweight size, dustproof/waterproof claims, details

Compact, lightweight construction with manufacturer-stated dustproof and waterproof design for outdoor use.

Application scenarios graphic for BT-T338 GNSS antenna: UAV positioning and agriculture drone field use

Suitable for UAV positioning and precision agriculture workflows where small, reliable GNSS antennas are needed.

Packaging/product list graphic with single BT-T338 antenna and handheld positioning device application

What’s included: 1 × Beitian BT‑T338 GNSS helical antenna.

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Beitian BT-T338 Ultra-Compact GNSS Helical Antenna SMA-J for Surveying/RTK, GPS L1 GLONASS G1 BDS B1 E1