Sky-Stealth 45X/Ka

Dual Use SOTM & Airborne Multiband Antenna

X/Ka Dual-Band

Dual-Band Full Duplex

Improved Algorithms

Innovative AHRS drifting compensation and pointing algorithm

Lightweight

Fully Self-Contained system


Overview

SKY-STEALTH antennas family is the latest breakthrough SATCOM on the move & airborne compliant terminals on the market. Designed and engineered by the same team that has created outstanding multiband communications products for the past 10 years, SKY-STEALTH products are available in different RF configurations to fully cover all the market requests, as monoband antenna in X, Ka, Ku bands or Dual band configurations as Ku/Ka or X/KA. 45cm parabolic antenna system has a dual reflector configuration ensuring the highest efficiency, while providing a low cross-polarization thanks to its corrugated feed-horn. Size, weights and interfaces have been chosen for being compliant with the most demanding avionics standards: on the dual-band version our team has integrated two bands so different from each other in just one single RF optic package, achieving monoband-like antenna performance while avoiding trade-offs deriving from the antenna small size.

*Given the fierce competition and pursuit of technological supremacy some of our graphic representations are deliberately simplified


Radio-Frequency

Radio-Frequency design has been optimized to obtain the highest performance on both bands. An ADE (Axially Displaced Ellipse) dual reflector configuration ensures high efficiency while a corrugated coaxial concentric feed-horn provides a low cross-polarization. Two polarizers and the associated duplexing systems allow to obtain the dual switchable polarization ensuring the necessary band to band and TX to RX isolations. All the experience acquired designing multi-band systems has been used to create this RF architecture capable to fit in the limited available space.


Mechanics

Mechanical design guarantees outstanding tracking performances even during the most intricated aerial evolutions, thanks to the use of advanced electric motors coupled to the structure via harmonic gearboxes. The movement of the stabilization and aiming axes takes place through Brushless DC electric motors with Hall effect sensors, served by an absolute incremental Encoder with an accuracy of 0.1 arc seconds. Carbon based Composite Materials and stainless steel
AISI 304 alloys have been selected to withstand the harshest environments without compromising the performances of the antenna system, decreasing the needs of periodical maintenance. Size and swept volume are optimized for tail or fuselage mounting on airplanes or unmanned vehicles.


Electronic

Antenna control Unit (ACU) has been specifically tailored on the antenna to take advantage of all the available space, All the electronic boards are self-contained in the moving part of the antenna, minimizing the impact in term of space and cable routing required to set-up the aircraft/UAV. The ACU is based on several modules that manage the motors, the attitude system, the tuner. All the modules are constantly monitored through dedicated hardware to implement the BIT functions, hardware watchdog is implemented to monitor critical failures of software or of the power supply system. Innovative algorithm based on hyper-complex mathematics, borrowed from astronautics attitude system, has been implemented to improve the pointing dynamics and delete uncertainties caused by heading drifting effects. All the Antenna parameters and diagnostic data are available through an intuitive and user-friendly web interface.

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