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Leica Geosystems
AR25 Choke Ring Antenna

AR25 Choke Ring Antenna

Product catalog summary

Introduction
The document introduces the Leica AR25, a revolutionary 4 constellation GNSS antenna designed to set new standards in low elevation tracking and multipath reduction. It emphasizes the durability and precision of the antenna, drawing a parallel to the enduring construction of the Egyptian pyramids.

Technical Specifications

Design: Features a Dorne-Margolin antenna element with a 3D choke ring ground plane.
Signals Tracked: Compatible with GPS, GLONASS, Galileo, and Compass systems, including various signal bands.
Dimensions and Weight: 380 mm x 200 mm, weighing 7.6 kg.
Connector: N-Type with TNC adapter supplied.
Supply Voltage: 3.3 – 12 VDC.
Nominal Impedance: 50 ohms.
Gain: Typically 40 dBi.
Noise Figure: 0.5 – 1.2 dBi.
Temperature Range: Operating from –55° C to +85° C, storage from –55° C to +90° C.
Environmental Protection: IP67 rating, resistant to humidity, rain, dust, sand, and wind, with waterproof capabilities.
Accessories: Weatherproof radome and various lengths of antenna cables available.

Design and Performance
The AR25 introduces a 3D choke ring design, enhancing the traditional 2D design's benefits. It uses an ultra-wideband Dorne-Margolin element, optimizing antenna gain for compatibility with most geodetic receivers. The design ensures superior multipath rejection and low elevation tracking, crucial for atmospheric studies and network RTK modeling.

Applications
The AR25 is suitable for various applications, including reference stations, monitoring, seismic studies, and scientific and atmospheric studies. It is built to withstand harsh environments, aligning with Leica Geosystems' "future proof" philosophy.

Conclusion
The Leica AR25 is a robust, high-performance antenna designed to meet the demands of emerging satellite systems and enhance geospatial data accuracy and reliability.

Catalog excerpts

Leica AR25 4 Constellation GNSS Antenna Revolutionary Design, Built to Last Will your infrastructure stand the test of time? The Egyptians showed great ingenuity and innovation to build the pyramids with such precision and strength that they still stand today. The revolutionary 4 constellation AR25 choke ring antenna sets new standards in low elevation tracking and multipath reduction by using an innovative 3D design that is built to last, even in the harshest of environments.

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Leica AR25 Stay ahead – be prepared With emerging satellite systems closely on the horizon, in the form of the European Galileo System and the Chinese Compass (Beidou) System, a new high performance antenna is needed to encompass all Global Navigation Satellite Systems, and further support the Leica Geosystems “future proof” philosophy. The new AR25 has been designed for all existing and currently planned signals of the GPS, GLONASS, Galileo and Compass systems. The way ahead The Leica AR25 brings choke ring design to a new level to enhance the key benefits of the choke ring antenna. Moving away...

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