UA91 - CHOCK RING ANTENNA
The eSurvey UA91 adopts a high-gain broadband antenna to receive GNSS signals such as GPS, BDS, GLONASS, Galileo, QZSS, and L-Band. The scheme of multi-stage 3D choke coils with a symmetrical distribution is adopted to achieve higher phase center stability and excellent anti-multipath interference performance. It has excellent performance and the phase center coincides with the mechanical center.
Powerful Satellite Tracking Capacity
Obtain all available and reliable data sources, with total channels and all signals (GPS, BDS, GLONASS, GALILEO, IRNSS, QZSS, and SBAS) of GNSS tracking.
High Phase Center Accuracy
Experience millimeter phase center accuracy with higher stability.
Excellent Multipath Suppression Effect
Due to the unique 3D choke coil design and electrostatic protection against eight kv of air and four kv of static electricity, no longer need to worry about interference by multipath.
Rugged Design for Harsh Environments
Use it for many years with IP67 design, which is 100% protected against solid objects like dust and sand, and it has been tested to work for at least 30 minutes under 15 cm to 1 m of water.
The UA91 works in the range of temperatures from -55℃ - to +85℃, and stores in -55℃ - +90℃.
The UA91 uses a high-gain wide-band dual-band multimode GNSS measuring antenna to achieve coverage of the GNSS signal reception.
|Satellites tracking||GPS||L1, L2, L5|
|BDS||B1, B2, B3|
|GLONASS||G1, G2, G3|
|GALILEO||E1, E2, E5, E6C|
|QZSS||L1, L2, L5|
|Axis ratio||√ ≤2 dB @Axial
√ ≤4 dB @Elevatoion angle 20°
|Antenna gain||√ ≥ 5 dBi @Axial
√ ≤ -3 dBi @Elevatoion angle 20°
|Out-of-roundness||≤ 1 dBi @Elevatoion angle 20°|
|Phase center offset||± 1.5 mm|
|Low Noise Amplifier Performance|
|Frequency range||1525 - 1615 MHz, 1165 - 1278 MHz|
|Characteristic impedance||50 Ω|
|Noise figure||1.6 dB typically @ 25°|
|LNA gain||52 ± 2 dB @ 25℃|
|LNA noise figure||×|
|In-band flatness||± 1.5 dB|
|Out-of-band suppression||√ L1 ± 200 MHz >40 dBc
√ L2 ± 200 MHz >50 dBc
|Differential transmission delay||≤ 5 ns (L1-L2)|
|Antenna transmission delay||15 ns (Typically)|
|Voltage||3.3 - 12 V dc|
|Current||≤ 45 mA|
|Operating temperature||-55℃ - +85℃|
|Storage temperature||-55℃ - +90℃|
|Humidity||Up to 95%|
|Dimension||D370 mm x H263 mm|
|Base material||Aluminium magnesium alloy|