Modal-Expansion Analysis of Multiple Monopole Antennas | Zendy

Quanxin Wang | Zendy; Zhongxiang Shen | Zendy; ErPing Li | Zendy

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Modal-Expansion Analysis of Multiple Monopole Antennas

Author(s) -

Quanxin Wang,

Zhongxiang Shen,

ErPing Li

Publication year - 2007

Publication title -

international journal of antennas and propagation

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.282

H-Index - 37

eISSN - 1687-5877

pISSN - 1687-5869

DOI - 10.1155/2007/76930

Subject(s) - magnetic monopole , hfss , radiation pattern , modal , antenna (radio) , field (mathematics) , monopole antenna , physics , function (biology) , radiation , transformation (genetics) , radiation properties , acoustics , mathematical analysis , geometry , computer science , optics , mathematics , telecommunications , materials science , microstrip antenna , pure mathematics , chemistry , quantum mechanics , biochemistry , evolutionary biology , gene , polymer chemistry , biology

The modal-expansion method is employed to analyze an array of multiplemonopole antennas. A perfectly conducting plate is introduced at the top of the monopolearray to facilitate the modal-expansion analysis. Expansion coefficients in the fieldexpressions are found by enforcing continuity conditions of the tangential field componentsacross the regional surfaces. Cylindrical function's addition theorem is employed to realizethe transformation of field expressions in different coordinate systems. Numerical results forthe S-parameters of a two-monopole antenna are presented and they are in good agreementwith experimental ones. Also examined is the effect of the distance between two monopoles onthe antenna's mutual coupling and radiation pattern. A four-monopole antenna is studied forits beam-steering capability and simulated results for its radiation properties are comparedwith those obtained by high frequency structure simulator (HFSS)

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