In the U.S., the FCC approved satellite-based Digital Audio Radio Servicebroadcasting in the S band from 2.31 to 2.36 GHz in 1995, currently used by Sirius XM Radio. More recently, it has approved portions of the S band between 2.0 and 2.2 GHz for the creation of Mobile Satellite Service networks in connection with Ancillary Terrestrial Components. There have been a number of companies attempting to deploy such networks, including ICO Satellite Management and TerreStar. The 2.6 GHz range is used for China Multimedia Mobile Broadcasting, a satellite radio and mobile TV standard which, as with proprietary systems in the U.S., is :wikt:incompatible|incompatible with the open standards used in the rest of the world. In May 2009, Inmarsat and Solaris Mobile were awarded each a 2×15 MHz portion of the S band by the European Commission. The two companies are allowed two years to start providing pan-European MSS services for 18 years. Allocated frequencies are 1.98 to 2.01 GHz for Earth to space communications, and from 2.17 to 2.2 GHz for space to Earth communications. EutelsatW2A satellite launched in April, 2009 and located at 10° East is currently the unique satellite in Europe operating on S band frequencies. In some countries, S band is used for Direct-to-Home satellite television. The frequency typically allocated for this service is 2.5 to 2.7 GHz. IndoStar-1 was the world's first commercial communications satellite to use S-band frequencies for broadcast, which efficiently penetrate the atmosphere and provide high-quality transmissions to small-diameter 80 cm antennas in regions that experience heavy rainfall such as Indonesia. Similar performance is not economically feasible with comparable Ku- or C-band DTH satellite systems since more power is required in these bands to penetrate the moist atmosphere.
Other uses
equipment compatible with IEEE 802.11b and 802.11g standards use the 2.4 GHz section of the S band. Some digital cordless telephones operate in this band too. Microwave ovens operate at 2495 or 2450 MHz. IEEE 802.16a and 802.16e standards use a part of the frequency range of S band; under WiMAX standards most vendors are now manufacturing equipment in the range of 3.5 GHz. The exact frequency range allocated for this type of use varies between countries. In North America, is an ISM band used for unlicensed spectrum devices such as cordless phones, wireless headphones, and video senders, among other consumer electronics uses, including Bluetooth which operates between 2.402 GHz and 2.480 GHz. Amateur radio and amateur satellite operators have two S-band allocations, 13 cm and 9 cm. Amateur television repeaters also operate in these bands. Airport surveillance radars typically operate in the 2700-2900 MHz range. Particle accelerators may be powered by S-band RF sources. The frequencies are then standardized at 2.998 GHz or 2.856 GHz. The National NEXRAD Radar network operates with S-band frequencies. Before implementation of this system, C-band frequencies were commonly used for weather surveillance. In the United States, the 3.55 to 3.7 GHz band is becoming shared spectrum under rules adopted by the Federal Communications Commission in April 2015 as a result of the National Broadband Plan. The biggest user of CBRS spectrum is the United States Navy. Cable companies are planning to use the band for wireless broadband in rural areas, with Charter Communications beginning tests of the service in January 2018. Used as a transmit intermediate frequency in satellite communications as a replacement for L band where a single/shared coaxial connection is used between the modem/IDU and antenna/ODU for both the transmit and receive signals. This is to prevent interference between the transmit and receive signals which would otherwise not occur on a dual coaxial setup where the transmit and receive signals are separate and both can use the whole L-band frequency range. In a single coaxial connection using S-Band to "frequency shift" the transmit signal away from L band, a multiplier such as 10, is usually applied to form the SHF frequency. For example, the modem would transmit at 2.815 GHz IF to the ODU and then the ODU up-converts this signal to 28.15 GHz SHF towards the satellite.
