Microwave Engineering Europe - November 2008 - (Page 35) RADIO — E-BAND 35 Figure 7: The effect of frequency on antenna gain for a 1ft (30 cm) parabolic antenna. Figure 8: ADC’s MMW 125 radio. communications, providing Gigabit Ethernet data rates of 1 Gbps and beyond. Cost effective radio architectures have been realized that enable carrier class availability at distances of a mile and further. The e-band spectrum offers the widest bandwidth radio spectrum available today, enabling the fastest radio products commercially offered. Favorable propagation conditions, almost equivalent to the widely used microwave bands, enable robust links to be engineered that can provide all weather carrier-class transmission over several miles. New Millimetre Wave radio systems can provide wireless “fibre like” connectivity at distances of up to 2 miles in cities such as New York, and can deliver significantly longer links in cities with drier climates. References [1] FCC Bulletin 70, “Millimetre Wave Propagation: Spectrum Management Implications,” July 1997. [2] FCC Notice of Proposed Rule Making 02-180, “Allocations and Service Rules for the 71-76 GHz,81-86 GHz, and 9295 GHz Bands,” June, 2002. [3] FCC Report and Order 03-248, “Allocations and Service Rules for the 71-76 GHz, 81-86 GHz, and 92-95 GHz Bands,” November, 2003; and FCC Memorandum Opinion and Order 05-45, March, 2005. [4] ECC Recommendation (05)07, “Radio frequency channel arrangements for fixed service systems operating in the bands 71-76 GHz and 81-86 GHz”, October 2005. [5] ETSI TS 102 524, “Fixed Radio Systems; Point-to-Point equipment; Radio equipment and antennas for use in Pointto-Point Millimetre Wave applications in the Fixed Services (mmwFS) frequency bands 71 GHz to 76 GHz and 81 GHz to 86 GHz,” July 2006. [6] ITU-R P.676-6, “Attenuation by atmospheric gases,” 2005. [7] ITU-R P.838-3, “Specific attenuation model for rain for use in prediction methods,” 2005. [8] ITU-R P.837-4, “Characteristics of precipitation for propagation modeling,” 2003. [9] ITU-R P.840-3, “Attenuation due to clouds and fog,” 1999. http://www.compotron.com http://www.compotron.com
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