Modal Resonant Frequencies and Radiation Quality Factors of Microstrip Antennas | Zendy

Jan Eichler | Zendy; Pavel Hazdra | Zendy; Miloslav Čapek | Zendy; Miloš Mazánek | Zendy

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Modal Resonant Frequencies and Radiation Quality Factors of Microstrip Antennas

Author(s) -

Jan Eichler,

Pavel Hazdra,

Miloslav Čapek,

Miloš Mazánek

Publication year - 2012

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 - 10.1155/2012/490327

Subject(s) - algorithm , antenna (radio) , modal , ground plane , physics , mathematics , geometry , computational physics , topology (electrical circuits) , computer science , telecommunications , materials science , combinatorics , polymer chemistry

The chosen rectangular and fractal microstrip patch antennas above an infinite ground plane are analyzed by the theory of characteristic modes. The resonant frequencies and radiation Q are evaluated. A novel method by Vandenbosch for rigorous evaluation of the radiation Q is employed for modal currents on a Rao-Wilton-Glisson (RWG) mesh. It is found that the resonant frequency of a rectangular patch antenna with a dominant mode presents quite complicated behaviour including having a minimum at a specific height. Similarly, as predicted from the simple wire model, the radiation Q exhibits a minimum too. It is observed that the presence of out-of-phase currents flowing along the patch antenna leads to a significant increase of the Q factor

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