Excellent Solution For Surveying

Choke Ring CR-G5

                                                                    Choke Ring Antenna
• Competitive high-end Geodetic Antenna
• Topcon’s 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. Improved low elevated satellites tracking











Next Generation Full Wave Geodetic Antenna Anti-Snow Spherical Dome
The CR-G5 is a newly designed choke ring antenna based on Topcon’s new TA-5 full spectrum GNSS antenna element. The TA-5 antenna element utilizes an array of vertical convex dipoles. This new antenna provides Full Wave tracking technology for existing and future GNSS signals. The antenna addresses the evolving requirements for reference networks and infrastructure monitoring applications

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Antenna without Anti-snow Dome 380 mm (D) x 155.5 mm (H)
With Topcon Anti-snow Spherical Dome 380 mm (D) x 292 mm (H)
With SCIGN Anti-snow Short Dome 415 mm (D) x 287 mm (H)
Antenna 4.9 kg
Topcon Anti-snow Spherical Dome 1.1 kg
Antenna w/ Topcon Anti-snow Spherical Dome 6 kg
Input Voltage +3 to +12 VDC
Current Consumption 100 mA (typical)
Connector N-type
MIL-STD-810G (Methods 501.5, 502.5)
Temperature -50°C to +70°C
Operating Range -55°C to +85°C
Storage Range 95%, Method 507.5
Salt Fog, 5% Method 509.4
Vibration Method 514.6, Broad band noise (random vibration),
along each of 3 axes, Category 4, table 514.6C-IV
Mechanical Shock 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
IP Rating IEC 60529 IP67
Drop Test Repeated drops from the height of 1 m on concrete surface.
All sides – top, bottom & border (with Dome)
RoHS Compliant Yes
Operating Frequency Range
Lower band 1230 MHz±70 MHz (L5, E5B, E3, L2, G2, E4, E6)
Upper band 1565 MHz±50 MHz (E2, L1, E1, G1, OmniStar, SBAS, CDGPS)
Out-of-Band Rejection
Upper band (1568.5 MHz ±150 MHz) -40 dBc (typical)
Lower band (1232 MHz ± 100 MHz) -60 dBc (typical)
Other bands
            f < 1000 MHz -60 dBc (typical)
            f < 1000 MHz -60 dBc (typical)
LNA Gain 43 dB (typical)
Gain at Zenith (90°) Lower band: +7.5 dB (typical) Upper band: +5 dB (typical)
Gain Roll-Off (from Zenith to Horizon) Lower band: -16.5 dB (typical) Upper band: -13 dB (typical)
Noise Figure 1.0 dB (typical)
VSWR 1.5 : 1
Differential Propagation Delay (typical) Lower band: 3 ns (maximum) Upper band: 3 ns (maximum)
Nominal Impedance 50 Ohm

Download CR-G5 Brochure

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