ORBIT FR GALILEO User Manual

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GALILEO/GPS
Base Station Reference Antennas

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BASE STATION ANTENNAS

> Main use:

• Base station antenna for reference applications

covering GALILEO E5, E6, L1 bands and GPS L5, L2,
L1 bands.

> Delivered documents:

• Measured return loss

• Measured radiation pattern

• Phase center calibration report

> Related standards:

• IEC 60068-2/14; -2/6; -2/64; 2/32

• EN 55022

> Related services:

• Maintenance

• Dedicated fi lters for custom GALILEO, GPS and/or

GLONASS sub-bands

• Specifi c radome and mechanical support

Typical 3D radiation pattern

➊ TECHNICAL PERFORMANCE

• Excellent phase center and group delay stability

• Highly stable radiation pattern (magnitude & phase)

• Optimized radiating element combined to a choke

ring provides increased multi-path immunity

• Wide bandwidth of the radiating helix

• Reduced ohmic losses (< 1.0 dB)

➋ DESIGN

• Sealed radome resists extreme weather

conditions

• High-performance LNA connector

• Reduced accommodation (easy to install

on the top of a mast)

• Integrated thermo-regulation for polar

applications (down to -60°C)

• Dedicated fi lters for out-of-band rejection and

dedicated LNA for pre-amplifi cation

This antenna has been designed under an

ESA contract (European Space Agency)

specifi cally targeting fi xed ground segment

reference applications requiring very

strong constraints on phase center stability

and multi-path immunity.

ENVIRONMENTAL TESTING:

• Thermal cycling test performed according to the norm IEC 60068-2-14.

• Sine vibration test performed according to the norm IEC 60068-2-6.

• Random vibration test performed according to the norm IEC 60068-2-64.

• Free fall test performed according to the norm IEC 60068-2-32.

Electrical characteristics

Part number ANTE 010-A

Operational frequency bands B1 Galileo/GPS: 1575.42 ± 20.46 MHz

(GPS L1 C/A, GPS L1 P(Y), GAL L1F, SBAS L1)

B2 Galileo/GPS/GLONASS: 1227.60 ± 61.38 MHz
(GPS L5, GPS L2C, GPS L2 P(Y), GAL E5a,

GAL E5b, SBAS L5, GLO L2 C/A, GLO L2 P, GAL E6C)

Option: reduced B1 and/or B2 bands

Polarization* Right hand circularly polarized

Coverage* Maximized within a conical coverage up to 85 degrees from zenith.

Gain antenna (without LNA)* > +5 dBic at zenith

> 0 dBic from 25 deg to 90 deg elevation
< -7 dBic at 5 deg elevation

LNA Gain* 35 dB +/- 2 dB

Axial Ratio* < 7 dB at 5 degrees elevation

< 5 dB at 10 degrees elevation
< 3 dB at 30 degrees elevation
< 2 dB at 60 degrees elevation

Phase center knowledge accuracy* Within 5 mm radius

Phase center stability < 1 mm radius for B1 sub-band

< 0.5 mm radius for B2 sub-band

Group delay variation* < 10 nsec

Group delay stability* < ± 250 ps at a given frequency point over temperature

Signal to noise density ratio* C/No ≥ 35 dBHz at B2 or B1 reference conditions

LNA 1dB compression point* ≥ -10 dBm

LNA Output 3rd order intercept* ≥ 0 dBm

LNA Burn-out protection (CW)* Antenna system able to withstand with no damage an in-band +20 dBm CW signal

LNA Burn-out protection (In-band Pulse)* Antenna system able to withstand with no damage an in-band pulsed

interference with the following characteristics:

• Pulse peak power: +30 dBm

• Pulse max width: 1ms (max duty cycle of 10%)

> Positioning

(*) Applicable to each of the GALILEO E5, E6, L1 bands and GPS L5, L2, L1 bands.

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