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Fade mitigation technique (FMT) is a method to overcome the rain fade effects in microwave communication link. The frequency diversity method using switching technique was used and implemented in this research. The frequency diversity improvement factor (FDIF) proposed by ITU-R was analysed using measured data. The measurement was used as a benchmark to evaluate the predicted and proposed the FDIF...
Millimeter wave (mm Wave) is today's breakthrough frontier for emerging wireless mobile cellular networks, wireless local area networks, personal area networks, and vehicular communications. In the near future, mm Wave products, systems, theories, and devices will come together to deliver mobile data rates thousands of times faster than today's existing cellular and WiFi networks for an example from...
At a frequency range above 5 GHz, rainfall becomes a serious and major source of attenuation for microwave communication. Atmospheric effects play a major role in designing terrestrial or satellite-to-earth links operating at frequencies above 5 GHz. Raindrops absorb and scatter radio waves, leading to signal attenuation and reduction of the systems availability and reliability. Rain attenuation is...
Measurements of 26 GHz attenuation due to rain were acquired from a microwave link set-up in Malaysia, a country in one of the most extreme weather with regard to rainfall rates. The data were analyzed with particular interest assessing the performance of Time Diversity as a conceivable fade mitigation technique in broadcast applications. The technique entails a process of retransmission of signals...
The radio waves propagating through the earth atmosphere will be attenuated due to the presence of atmosphere particles, such as water vapor, water drops and the ice particles. The atmospheric gases and rain will both absorb and scatter the radio waves, and consequently degrade the performance of the link. Rain is a major source of attenuation for microwave propagation above 7 GHz. In tropical and...
Satellite links operating at frequencies above 10 GHz in the tropics typically suffer severe signal degradation due to rain. The study attempts to investigate the impacts of rain on the performance of satellite-Earth links at V-band frequency. Attenuation due to rain at 38 GHz had been measured for a period of 20 months in Malaysia. Studies are being conducted to quantify the rain-induced degradations...
The Radial Line Slot Array (RLSA) antenna is known for its good characteristics such as low profile, low cost, aesthetically pleasing, ease of installation and simple structure. This research involves the optimization of the design and development of a novel linearly polarized Beam Squinted Radial Line Slot Array (RLSA) antenna at 5.8 GHz band. The research objective is to study the optimum size of...
The radial line slot array (RLSA) Antenna is known for its good characteristics such as low profile, low cost, aesthetically pleasing, ease of installation and simple structure. This research involves the design and development of a novel linearly polarized beam squinted radial line slot array (RLSA) Antenna for IEEE 802.11a WLAN application operating on UNII frequency band standard, with frequency...
In this paper presents a reconfigurable of multiple element microstrip rectangular antenna and integration with PIN diode switches. The designed corporate feed concept is used to animate an eight elements linear array of rectangular microstrip patch. Specifically, this design uses two switches with operating frequency at 5.8 GHz. It will reconfigure the beam to generates concave (focusing/beam narrow)...
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