Browsing by Author "Abiy, Bekele"

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    Bandwidth and Gain Performance Comparison Of Rectangular-Patch Microstrip Antenna (RMSA) And Coplanar Waveguide (CPW) Rectangular-Patch Antenna
    (Addis Ababa University, 2011-01) Abiy, Bekele; Mohammed, Abdo (PhD)
    In today’s world, microstrip antenna and coplanar waveguide patch antenna are used in all wireless communication such as cellular telephony, satellite, portable personal communication, aircraft, spacecraft, and missile applications. The growth and popularity of wireless application is quite dominant because of its mobility, the demand for high speed transmission of large data, customer request for multi-media service, and the need for new technologies, as well. This shows that there is a large investment that has been put in to wireless communication by major companies in the telecommunication industry. WLAN is one part of the investment that gains an increase in its usage because it provides high quality of services with low cost to more users. The IEEE 802.11 workgroup currently use three frequency ranges 2.4 GHz, 3.6 GHz and 5 GHz for WLAN technologies. Each range is divided into a multitude of channels. Countries apply their own regulations to both the allowable channels, allowed users and maximum power levels within these frequency ranges [1].