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Which of the following explains the concept of diffraction loss?(a) Principle of Simultaneity(b) Pascal’s Principle(c) Fresnel zone(d) Archimedes’ PrincipleI have been asked this question at a job interview.This key question is from Diffraction topic in chapter Mobile Radio Propagation: Large – Scale Path Loss of Wireless/Mobile

Answer»

The CORRECT choice is (c) Fresnel zone

Explanation: The concept of diffraction loss is a FUNCTION of the path difference AROUND an obstruction. It can be explained by Fresnel ZONES. Fresnel zones represent successive regions where secondary waves have a path length from Tx to Rx which are nλ/2 greater than total path length.



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