The new Low Earth Orbit (LEO) and Non-Geostationary Satellites Orbit (NGSO) constellations in general have become a key trend in the satellite industry. NGSO constellations open new opportunities for potential users, including high data throughput, low latency, and ability to serve areas that previously had no satellite coverage.

The new generation of Comtech UHP hubs support a large number of satellites in different orbits and provides automatic roaming terminals between different networks while maintaining the same routing and QoS. Information about all the satellites, coverage zones and service periods is stored in the satellite modem and used to autonomously select the appropriate network/satellite for initial entry and further operation depending on the current location and time. The stored satellite information is also used to calculate frequency shift compensation (Doppler effect) and to proactively adjust network timing.

UHP satellite routers can be used for fixed and/or mobile terminals, are compatible with mechanically and electronically steering antennas, and can also be connected with two antennas simultaneously for fast handoff between descending and ascending satellites. High throughput and adaptive modulation up to 256APSK provide highly efficient operation with different satellites, including High Throughput Satellites.

LEOs and MEOs hold the promise of delivering high-speed internet to unserved areas of the globe.

LEO constellations are projected to be in the thousands of satellites communicating with thousands of landing stations installed around the glove. A critical component in the landing station is the BUC. Comtech has developed high-performance, high-reliability and low-cost Ka-band BUCs for landing station applications.

Ka-band and Q/V band assure broad bandwidths and the satellites’ lower orbital path assures low latency and a smaller footprint. Customers are requiring broad band and high-power BUCs for their Gateway solutions. Typical applications can require more than 20 Watts of linear power and more than 1 GHz of bandwidth in multi-carrier configurations, with enhanced phase noise and linearity requirements to support high throughput. Comtech has developed customized solutions to minimize cost while maximizing performance and reliability.