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CHCNAV AT661 Antenna
Compact rugged geodetic GNSS antenna
GNSS Antennas
The AT661 is a compact, rugged geodetic GNSS antenna delivering performance comparable to a conventional choke-ring antenna. With full-GNSS multi-constellation tracking and optimal multipath rejection, it is ideal for surveying, mapping, machine control and reference-station use.
- Full-GNSS multi-constellation tracking
- Choke-ring-class multipath rejection
- Stable geodetic phase centre
- Compact, rugged build
Highlights
Why the CHCNAV AT661 Antenna
Geodetic-grade accuracy
Full GNSS multi-constellation tracking with a stable phase centre delivers geodetic-grade accuracy in a compact form factor.
Excellent multipath rejection
Choke-ring-class multipath rejection ensures clean signal reception in demanding environments.
Specifications
Full specifications
| Type | Geodetic GNSS antenna (compact, choke-ring-class) |
|---|---|
| Signal tracking | GPS L1/L2/L5 · GLONASS L1/L2/L3 · BeiDou B1/B2/B3 · Galileo E1/E5a/E5b · QZSS L1/L2/L5 · IRNSS L5 · SBAS · L-band |
| Polarization | RHCP |
| Phase centre accuracy | ±1 mm |
| LNA gain | 50 ±2 dB |
| Gain at zenith (90 deg) | 6 dBi minimum |
| Noise figure | <= 2.0 dB |
| VSWR / axial ratio | <= 2 / <= 3 dB |
| Nominal impedance | 50 Ohm |
| Input voltage / current | 3-12 V DC / <= 70 mA |
| Connector / mounting | TNC female / 5/8" - 11 female thread |
| Weight / dimensions | 2 kg / 220 x 150 mm |
| Operating temperature | -45 deg C to +85 deg C |
| Protection / vibration | IP65 · MIL-STD-810G 514.7 |
| Calibration | NGS |
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