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Over the past 15 years, means of satellite Internet access have been rapidly developing on the high seas, beyond the reach of coastal communication networks.
For yachts and small vessels, dial-up became the first available – connection via satellite phones Globalstar, Inmarsat Mini-M, Iridium, Thuraya.
The cost of communication was high, the speed was measured not in megabytes, but in kilobits per second. Later VSAT compact (with a diameter of half a meter) antennas appeared, working with various Ku-band satellites; channel capacity reached 1 Mb / s, with the ability to transfer large volumes. Apart from a slight signal delay due to the large distance from the terminal to the satellite, Internet browsing Continue reading
Launched seven years ago, the mini-VSAT broadband network was the first to leverage the capabilities of spread spectrum technology to provide global multi-megabit services to ships at sea with small, powerful antennas.
Providing the opportunity to take full advantage of the VSAT service – namely, speed and economy – by installing only compact and affordable on-board antenna systems, has become a truly winning strategy for mini-VSAT. Therefore, it is not surprising that mini-VSAT Broadband has become a best-seller among marine VSAT services.
Encouraged by this success, KVH has created the next generation of mini-VSAT Broadband Network. Using ACSM technology (adaptive coding, expansion, and modulation), network bandwidth has tripled over the past year. More efficient transmission technology, enhanced satellite throughput and automatic updates for the entire installed base of antenna systems – all these have become the basic principles of a network that Continue reading
Satellite antennas are made as solid / all-stamped, mesh and precast / sectional. The solid ones are made of a whole metal sheet and have a shape without technical holes and joints. Their signal reception quality is better than the others, and the design is less prone to kinks and defects during operation.
Mesh antennas are assembled from strips, forming a receiving grid. Their advantage is less windage, so mesh satellite dishes are preferred in areas with increased wind load.
Prefabricated antennas are made of petals and can be compactly packed for transportation and long-term storage. They, like sectional ones, are convenient for regular transfer, as they are easy to fold and allow you to quickly deploy the system. Cons of the design – in the weak joints of the petals, which are easily broken and require regular professional maintenance.
Mesh satellite dishes have slightly worse signal quality than all-metal antennas, but not due to technical holes. Since for the correct reflection of the beam the shape of the mirror must be strictly parabolic, it is Continue reading