Summary

International Symposium on Antennas and Propagation

2010

Session Number:3TA4

Session:

Number:3TA4-2

Analysis of a Large Scale Low-Profile Narrow-Wall Slotted Waveguide Array by Parallel MoM Using Higher Order Basis Functions under MPI Circumstance

H.-W. Zhang,  X.-W. Zhao,  Y. Zhang,  C.-H. Liang,  H. Su,  

pp.-

Publication Date:2010/11/23

Online ISSN:2188-5079

DOI:10.34385/proc.52.3TA4-2

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Summary:
Low profile high gain antenna array can be realized easily using narrow-wall slotted waveguide, which are widely used in modern radar and communication systems. Recent years, the design and analysis of narrow-wall slotted waveguide array is much more emphasized. As part of each slot is cut into the broad-wall, it is difficult to represent it using equivalent magnetic currents as in the conventional method-of-moments (MoM) approach [1]. Also, there exists no suitable Green’s function for this kind of geometry if the conventional MoM is employed [2].Recently, the radiation patterns of narrow-wall inclined slots have been computed using the MoM based on the electric field integral equation (EFIE) by Li et al [1] [2]. As the mutual couplings among the slots are taken into account, the method is more accurate than the conventional asymptotic methods [2]. However, the MoM based on the Rao-Wilton-Glisson basis functions (RWGs) produces a very large number of unknowns for electrically large structures [3]. To reduce the number of unknowns, higher order polynomials over wires and quadrilateral plates are used as basis functions over larger subdomain patches [2][4]. The use of higher order basis functions significantly reduces the number of unknowns. To further reduce the total wall clock time, the large dense MoM matrix is divided into a number of smaller block matrices that are nearly equal in size and distributed among all the available process in the parallel method.