Drotek DA233, DA275 & DA435

Drotek DA233, DA275 & DA435 — Professional GNSS Antennas for Precision UAV and RTK Systems (now at AT Group)

Drotek is a leading European manufacturer of GNSS and navigation components for UAVs, robotics, and industrial applications. Its DA-series helical antennas DA233, DA275, and DA435, combine high gain, wide-band reception, and exceptional durability.
All three models are designed for RTK (Real-Time Kinematic) precision, multi-constellation tracking, and reliable signal performance in challenging environments.

At AT Group, as an official Drotek distributor, we offer these antennas from stock with fast EU and worldwide shipping.

DA233 – Compact Multi-Band Helical Antenna for General GNSS Applications

The Drotek DA233 is a compact and affordable L1/L2 multi-band GNSS helical antenna, ideal for general-purpose navigation and mobile applications. It supports GPS, GLONASS, BeiDou, and Galileo signals simultaneously, providing improved satellite availability and robust positioning.

Peak Gain: ≥2 dBi

LNA Gain: 39 dB

Voltage Range: 3.3 – 12 V

Operating Range: −40 °C to +70 °C

Connector: SMA Male

Best for: UAV developers, rover modules, mobile GNSS receivers, and vehicle navigation systems seeking a lightweight, cost-efficient antenna with consistent accuracy.

A practical solution for standard RTK or mapping drones where size and power efficiency matter.

DA275 – High-Precision L1/L2/L5 GNSS Antenna for Demanding Environments

The Drotek DA275 is engineered for professional-grade RTK and PPK applications, combining a quadrifilar helix architecture with multi-feed technology for superior satellite tracking.
It offers outstanding out-of-band suppression, low noise, and IP67 protection, making it ideal for harsh outdoor conditions.

Bands Supported: GPS, GLONASS, BeiDou, Galileo (L1/L2/L5)

LNA Gain: 32 ± 2 dB

Voltage Range: 3 – 16 V

Waterproof: IP67 rated

Operating Temp: −40 °C to +85 °C

Weight: 18 g

Best for: Survey-grade drones, RTK base stations, precision agriculture, and autonomous vehicle guidance where environmental resistance and stability are critical.

Balances performance and weight — a top choice for advanced UAV integration

DA435 – Premium GNSS Antenna for Extreme Precision and Reliability

The DA435 represents the top tier in Drotek’s antenna lineup, providing enhanced gain (≥2.5 dBi), improved axial ratio (≤1.5 dB), and broader GNSS compatibility (including GLONASS G3).
It’s built for professional mapping and surveying platforms requiring centimeter-level accuracy and ultra-low noise operation.

Bands: GPS, GLONASS (G1/G2/G3), BeiDou, Galileo (L1/L2/L5)

LNA Gain: 35 ± 3 dB

Noise Figure: ≤1.5 dB

Waterproof: IP67

Operating Temp: −40 °C to +85 °C

Weight: 32 g

Best for: Industrial drones, RTK reference stations, high-precision robotics, and research platforms where signal integrity and accuracy are non-negotiable.

A professional-grade antenna for integrators who demand maximum signal fidelity and environmental resilience.

Choose the right Drotek antenna for your mission.

DA233 is the lightweight choice for compact rovers and drones.

DA275 balances weight and professional RTK performance.

DA435 delivers the lowest noise and best axial ratio for survey-grade base stations and high-precision mapping.

Available Now at AT Group – Official Drotek Distributor

As an authorized Drotek distributor, AT Group provides fast access to genuine Drotek components, including GNSS modules, antennas, and accessories, with reliable shipping throughout Europe, the USA, and Asia.
We also support volume orders and custom integration projects for professional UAV manufacturers and research organizations.

Visit ATGroup.store to explore the full Drotek product range or request a personalized quote for your next UAV or RTK project.