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9M Ku Band Earth Station Antenna Project —— In Saudi Arab

2017-08-10

General Background

Arabsat & STC 9M Earth Station Project start since contract signed on 20th, November, 2013. All contract work completes including: equipment design review, equipment procurement, factory test, equipment delivery, field installation, field commissioning and field test. And test results attached.

The probecom Arabsat& STC 9M Earth station project delivers exceptional performance for transmit/receive applications for Ku-band frequency. This ground earth station antenna offers a reflector design that incorporates precision-formed panels, truss radials and hub assembly using matched tooling for interchangeable components. It features an innovative Ring-focus feed and sub-reflector design which results in high gain, low noise temperature, high antenna efficiency and excellent rejection of noise and microwave interference. A large center hub provides spacious accommodation for equipment mounting. The reflector is supported by a galvanized elevation over azimuth kingpost pedestal that provides the required stiffness for pointing and tracking accuracy. The pedestals are designed for full orbital arc coverage and are readily adaptable to ground or rooftop installations.

Highlighted features

a) Precisely adjusted before leaving factory, and no need theodolite to adjust the panel accuracy;

b) Meets CCIR 580 and INTELSAT Requirements

c) High precision alloy aluminum main reflector.

d) Hot spray galvanized with white paint

e) High RF performance

f) Galvanized stainless steel hardware

g) A large hub for install RF equipment

h) Multi-layer anti-corrosion treatment.



Electrical Specification

Type

K90T

Operating Frequency, /GHz

Ku-band

RX

TX

10.95~12.75

13.75~14.5

Gain, Mid-band/dB

58.6

60.27

Polarization

Linear

XPD/dB, on Axis

35

35

-3dB beam Width,

0.19°

0.16°

Isolation, Tx to Rx, dB

85

Sidelobes

-14dB, CCIR 580-4

VSWR

1.3

1.3


Installation on the site

12

34

56


Antenna Shelter Installation

1. 9M Antenna Installation

2. Antenna shelter installation

3. Outdoor cable tray laying work

Equipment Installation

4. Installation of environment temperature system

5. Installation of HPA

6. Installation of LDA for Tx Port

7. Installation of air-conditioner

8. Installation of antenna control & tracking system(ACU, ADU and beacon tracking receiver)

9. Installation of dehydrator for waveguide


The Main Equipment


Item

Details

Qty

Pass

Antenna control system

9.0m Ring-focus Antenna (motorized Auto-Tracking)

Antenna control and tracking system

Beacon receiver

TX Axis Crossover Waveguide(LP)

Indoor Dehydrator

1

Shelter system

Power supply and distribution system

Air condition system

Fire alarm and gas fire extinguishing system

Environment monitoring system

1

Uplink system

Elliptical Waveguide

LDA system

HPA system

Combiner and RF cable

1

Downlink system

Elliptical Waveguide

LDA system

LNA system

1

M&C system

M&C RF equipment

1

Grounding System

The grounding system is a basic for lightning protection. Over tension protection, electrostatic protection and etc.

1

Foundations

Foundation for 9m antenna

Foundation for antenna shelter

1


Antenna Accessory

l Motorization Kits

l Limit switches

l Factory Feed System Testing and Documentation

l Ocean /Air Transport Packing

l Foundation Kit

l Grounding Kit Cable-Mounting Kit


Equipment Performance Test

From July 29, 2014 to August 28, 2014, complete the system performance test , the testing results meet the requirement of the contract technical document. Test content and result attached.

Test Start: July 29, 2014 August 8, 2014

Antenna Rotation Range

Technical Requirement Az±180°(2 sector, 100° continuous each sector)El.0-90°

Test Result Az±180°(2 sector, 100° continuous each sector)EL. 0-90°

Antenna Rotation Speed

Technical RequirementNone

Test ResultAZ 0.021°/s, EL0.023°/s

Antenna tracking test

Technical Requirement1/10  3dB bandwidth

Test Result0.046 Result Pass

Antenna Testing Pattern

Antenna Testing Pattern-AZ

AZ TEST RESUIT

Antenna Testing Pattern-EL

EL TEST RESUIT

Conclusion

Arabsat & STC 9M Earth Station Project starts from contract signed on November 5, 2013, through design review of Technical Proposal of Earth Station Projectequipment procurement, factory test, equipment shipment, on-site installation, on-site commissioning and test, antenna technical performance meet the requirement of the contract through joint effort by two parties. Equipment quantity and models also meet the contract requirement.