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Home > Communications > Wireless > Networking
Microwave Radio: SONET/SDH and mm-Wave
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| Published Date:
September 2008
Published By:
Practel, Inc.
Order Code:
R606-80
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This report researches technologies and markets for SONET/SDH and high-frequency (60 GHz and E-band) microwave radio. It concentrates on subjects related to these radios benefits, technical details, markets and applications. Though utilized often in different applications and markets, these microwave radios allow sustaining high-speed reliable communications, and are used as alternative to fiber optics.
Despite early predictions, SONET/SDH still prevails in fiber optics transmission as a major standard. Microwave radio that is able to carry SONET/SDH signals format is the logical extension or substitution of fiber optic communications in cases when:
- Terrain and other factors preclude fiber placement
- Economics of a project dictate use of microwave technologies instead of fiber
- optics systems.
The SONET/SDH microwave radio market is active and became stable if compared with the telecom market after depression of 2000-2003. Stability of the utility industry and tighter requirements on network characteristics in the financial world contribute to the fact that this market not only survived, but also continue to grow. The report analyzes technology specifics and market properties of these radios as well as portfolios of major manufacturers.
mm-Wave radios experience the “second life” due to their benefits and regulations that have recently opened relatively large windows of spectrum for their use. There are several motives for wanting to use millimeter-wave radio links:
- The radio spectrum at very high frequencies is still rather undeveloped, and
therefore more radio spectrum with wider bandwidths is available at these frequencies;
- The system capacity is higher at very high frequencies because the range
of radio signals is limited, resulting in smaller cells. Therefore the same
frequency can be reused at shorter distances;
- The inherent security and privacy is better at very high frequencies
because of the limited range and the relatively narrow beam widths that can be achieved;
- The spatial resolution is better at very high frequencies;
- It is easy to realize Gb/s transmission;
- The physical size of antennas at very high frequencies is small and it becomes practical to build complex antenna arrays and/or further integrate them.
The interest in these technologies was also sparked by decisions of regulatory agencies around the globe to release and regulate vast volumes of spectrum; and the progress in the chips design that made it possible to produce high-frequency IC with relatively low cost.
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