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Topcon CR-G5 GNSS Choke Ring Antenna

The Topcon CR-G5 GNSS choke ring antenna is a highly scalable and robust full wave geodetic antenna designed for all CORS environments including land surveying, topography and OEM manufacturing.



The CR-G5 GNSS choke ring antenna from Topcon is a ground-breaking antenna designed and developed based on Topcon’s new TA-5 full-spectrum GNSS antenna component. The new antenna redefines the “full wave” tracking technology by making it better than ever for existing and future GNSS signals.

Replacing the CR-G3 antenna, the CR-G5 antenna is designed for better signal tracking even at low frequency. It also fulfills requirements of reference networks as well as infrastructure monitoring applications with complete accuracy.

The CR-G5 has been tested to ensure that it withstands the harshest environments including snow, dust and water. It received a IPX7 waterproof and IP6X dustproof ratings and it has also proven to withstand 1 metre drops onto concrete.


  • High-end geodetic antenna
  • TA-5 vertical convex dipole antenna element for full spectrum GNSS signal tracking
  • Topcon designed choke ring ground-plane
  • Environmentally robust and sealed
  • Improved phase-center stability in vertical over expanded GNSS frequency band

Technical Specifications

Tracking: GPS, GLONASS, Galileo, Compass, QZSS
Operating Frequency Range (Lower Band): 1230±70 MHz (L5, E5B, E3, L2, G2, E4, E6)
Operating Frequency Range (Upper Band): 565±50 MHz (E2, L1, E1, G1, OmniStar, SBAS, CDGPS)
Out of Band Rejection (Lower): -60 dBc
Out of Band Rejection (Upper): -40 dBc
Input Voltage: 3 to 12 VDC
Power Consumption: 100 mA (typical)
Operating Temperature: -50 °C to 70 °C
Storage Temperature: -55 °C to 85 °C
Dust/Water Protection: IP67 IEC 60529
Vibration Rating: Method 514.6, Broad band noise (random vibration), along each of 3 axes, Category 4, table 514.6C-IV
Humidity: 95%
Shock Rating Method 516.6, along each of 3 axes. Procedure I – Functional Shock, Table 516.6-I, Fig. 516.6-8, accelerative forces up to 40g
Salt Fog 5%
Drop Test: Repeated drops from the height of 1 m on concrete surface. All sides – top, bottom and border (with dome)
Dimensions: 380 mm (D) x 155.5 mm (H) (without anti-snow dome)
380 mm (D) x 292 mm (H) (with anti-snow dome)
415 mm (D) x 287 mm (H) (with SCIGN dome)
Weight: 4.9 kg (antenna)
1.1 kg (dome)
6 kg (antenna and dome)


The CR-G5 GNSS choke ring antenna from Topcon is available through TerrisGPS. If you would like more information regarding this product, please get in touch with us by completing the Request Pricing form.

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Client Testimonials

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"Thank you for your prompt service. All seems to be working well again. Your techs were very helpful with the troubleshooting."
J.O. - Ground Navigation
"Thanks for all the troubleshooting help, also to John for his assistance and the prompt answers from you guys!"
F.A. - Survey Industry

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