Cart (Loading....) | Create Account
Close category search window

A Modified Diffraction Coefficient for Imperfect Conducting Wedges and Buildings With Finite Dimensions

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Torabi, E. ; AmirKabir Univ. of Technol., Tehran ; Ghorbani, A. ; Tajvidy, A.

Multiple building diffraction loss calculation is often based on the assumption that their dimensions are infinite in the direction perpendicular to the propagation path, even though in reality this assumption is not valid. In this paper, a modified diffraction coefficient model for the calculation of a more realistic diffraction loss caused by a single building with finite dimensions is proposed. The overall diffraction loss is calculated for a group of buildings in a row by using the proposed model. In addition, after carrying out the field measurements, it is shown that for some particular cases where the transmitter and diffracting obstacles are not far away from each other (i.e., microcells or picocells), spherical-wave modeling produces a better accuracy than the plane-wave approximation. It is also demonstrated that the theoretical results can further be improved by considering the higher order terms in the calculation of diffraction coefficients. Lastly, excess path loss obtained for a row of buildings with spherical-wave assumption is compared with our measurement data. This comparison shows reasonable correspondence between our theoretical model and measurements. Therefore, our proposed model can successfully be used for improving the theoretical methods for predicting path loss in urban environments, where diffraction from a number of buildings has to be considered.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:57 ,  Issue: 4 )

Date of Publication:

April 2009

Need Help?

IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.