期刊名称：International Journal of Antennas and Propagation
印刷版ISSN：1687-5869
电子版ISSN：1687-5877
出版年度：2007
卷号：2007
DOI：10.1155/2007/76930
出版社：Hindawi Publishing Corporation
摘要：The modal-expansion method is employed to analyze an array of multiple
monopole antennas. A perfectly conducting plate is introduced at the top of the monopole
array to facilitate the modal-expansion analysis. Expansion coefficients in the field
expressions are found by enforcing continuity conditions of the tangential field components
across the regional surfaces. Cylindrical function's addition theorem is employed to realize
the transformation of field expressions in different coordinate systems. Numerical results for
the S-parameters of a two-monopole antenna are presented and they are in good agreement
with experimental ones. Also examined is the effect of the distance between two monopoles on
the antenna's mutual coupling and radiation pattern. A four-monopole antenna is studied for
its beam-steering capability and simulated results for its radiation properties are compared
with those obtained by high frequency structure simulator (HFSS).
