MarAnt

MarAnt is an active low profile GPS/GLONASS antenna. It is available in GD (GPS/L1-only) or GGD (GPS/GLONASS dual frequency L1/L2) versions.

MarAnt was specifically designed as a rover antenna for land and marine applications. It has highly waterproof housing. Wide antenna pattern provides satellites tracking up to zero degrees elevation. Integrated low-noise amplifier provides low-noise operation within frequency bands 1565-1615 MHz (L1) and 1217-1265 MHz (L2). LNA has excellent filters for out-of-band rejection. Also LNA has fast clamping diodes in both L1 and L2 channels to prevent the device of being destroyed by high-voltage in-band jamming. DC power supply is supplied through the coaxial connector.

Antenna boards are made of temperature-stabilized ceramic.

Specification

Electrical

Frequency bands: 1550-1620 MHz (L1) and 1215-1265 MHz (L2)
VSWR (max): 2.0:1 within both 2 bands
Impedance: 50 Ohms
Polarization: RHCP
Axial ratio: -3dB (min)
LNA Gain Power: 32 + 3dB
LNA Noise Figure: 1.75dB
DC voltage: From 3 up to 12V
DC current: 45 mA @3.0

Mechanical

Weight 581g
Dimensions: 140x140x74mm
Connector: TNC
Cable type/length: RG58/10m

Environmental

Temperature: -50C to +70C

Performance

Signal-to-noise (SNR) coverage in dB*Hz vs. elevation angle is shown on the plots below for GPS L1 (C/A code), L2 (P2 code) and GLONASS L1 (C/A code), L2 (P2 code) frequencies:

Axial ratio versus frequency:

Offsets and PCV calibrations

Antenna parameters were calibrated at Hannover University. For details, please, refer to www.geopp.de and www.ife.uni-hannover.de.

Absolute data (GEO++ *ane file):

OFFSETS L1=0.00183 0.00034 0.06608
OFFSETS L2=-0.00151 0.00029 0.06902
ELEVATION INCREMENT=5 (from 0 to 90degrees)
VARIATIONS L1=-0.00351 -0.00178 -0.00056 0.00014 0.00050 0.00072 0.00098 0.00132 0.00169 0.00196 0.00204 0.00188 0.00154 0.00110 0.00068 0.00035 0.00014 0.00003 0.00000
VARIATIONS L2=0.00019 -0.00021 -0.00075 -0.00083 -0.00031 0.00053 0.00127 0.00160 0.00148 0.00111 0.00078 0.00067 0.00079 0.00098 0.00103 0.00084 0.00049 0.00014 0.00000

Relative data (to be used with UNAVCO calibrations, NGS format):

1.23 0.8 84.84
-11.33 –7.75 -4.21 -0.99 1.72 3.83 5.29 6.14 6.45 6.34
5.93 5.31 4.51 3.59 2.59 1.62 0.78 0.21 0.0
-1.41 0.91 76.96
-9.86 -5.61 -2.1 0.24 1.54 2.22 2.70 3.23 3.76 4.12
4.06 3.53 2.64 1.64 0.79 0.26 0.03 -0.01 0.0

Note: Specifications are subject to change without notice.