Show simple item record

dc.contributor.authorEl-Shayeb, Mahmoud
dc.contributor.authorAhmad Faizal, Mohd Zain
dc.date.accessioned2010-08-12T04:15:19Z
dc.date.available2010-08-12T04:15:19Z
dc.date.issued2009-06-20
dc.identifier.urihttp://dspace.unimap.edu.my/123456789/8614
dc.descriptionMUCEET 2009 is organized by Malaysian Technical Universities Network (MTUN) comprising of Universiti Malaysia Perlis (UniMAP), Universiti Tun Hussein Onn (UTHM), Universiti Teknikal Melaka (UTeM) and Universiti Malaysia Pahang (UMP), 20th - 22nd June 2009 at M. S. Garden Hotel, Kuantan, Pahang.en_US
dc.description.abstractThe effects of vegetation media on the planning and design of radio links at microwave and millimeter wave frequencies are considerable and must be accounted for by radio system operators and users. This paper presents a study of propagation models for the excess attenuation of signals caused by such media whose mathematical descriptions have been optimized using measured data. This paper shows that one of the models which expresses the attenuation as a function of frequency and depth of vegetation gives close predictions for the two broad generic cases of trees 'in-leaf and 'out-of leaf . Measurements have been made to determine the extent of attenuation of millimeter-wave signals when propagated through vegetation. Methods for predicting such attenuation exist, but are either deterministic in form or therefore complex to implement or are completely empirical and take no account of measurement geometry. A new semi-empirical model is presented here which is based on measurements of vegetation attenuation presented previously, and has some account of the measurement geometry. This model is compared with measured data and is shown to give considerably better agreement.en_US
dc.language.isoenen_US
dc.publisherUniversiti Malaysia Pahang (UMP)en_US
dc.relation.ispartofseriesProceedings of the Malaysian Technical Universities Conference on Engineering and Technology (MUCEET) 2009en_US
dc.subjectVegetationen_US
dc.subjectPropagationen_US
dc.subjectMicrowaveen_US
dc.subjectPredictionen_US
dc.subjectMalaysian Technical Universities Conference on Engineering and Technology (MUCEET)en_US
dc.titleStudy of measurements and prediction models for signal attenuation in vegetation media at microwave frequenciesen_US
dc.typeWorking Paperen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record