Premium
New antenna mode generation based on theory of characteristic modes
Author(s) -
Ghalib Asim,
Sharawi Mohammad S.
Publication year - 2019
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21686
Subject(s) - chassis , antenna measurement , antenna (radio) , monopole antenna , coaxial antenna , acoustics , antenna efficiency , dipole antenna , loop antenna , antenna factor , physics , electrical engineering , computer science , engineering , mechanical engineering
In this article, the effect of actual antenna elements on rectangular chassis modes is investigated. The study is performed on three different antenna types, that is, printed inverted‐F antenna (PIFA), printed monopole, and printed loop antennas. For the first time, we show that the presence of the antenna generates a completely new mode called the “ antenna mode ” (compared with chassis mode modifications as in other existing works). The new “ antenna mode ” only depends on the shape or geometry of the antenna and is independent of its location on the chassis (unlike chassis modes). In the presence of the antenna, the current maxima lies on the antenna element for all the modified chassis modes and the newly generated “ antenna mode .” In such scenarios, pure excitation of single characteristic mode (CM) is not possible with known existing techniques.