GTD Evaluation of Signal Level Reduction Due to Aircraft Crossing over Satellite Communications Paths Using a Thin Plate Model

Shinichi NOMOTO  Yoshihiko MIZUGUCHI  

IEICE TRANSACTIONS on Communications   Vol.E85-B   No.8   pp.1596-1603
Publication Date: 2002/08/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Antenna and Propagation
satellite broadcasting/communications,  aircraft shadowing,  GTD,  forward scattering,  thin plate model,  

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Since the penetration of VSAT services is rapidly increasing, more earth stations will operate around airports than is currently true. This makes it essential to evaluate accurately and efficiently the impairment of received signals due to blockage by aircraft. This paper proposes developing an aircraft model using a thin, planar polygon to represent the aircraft projection and to apply GTD with corner diffraction terms. The effectiveness and applicability of the method is then examined numerically. It is demonstrated that the results measured in the Ku-band around two airports are a good match with the numerical simulations even when the distance between the aircraft and the stations is small.