Modal Resonant Frequencies and Radiation Quality Factors of Microstrip Antennas

Autor:	Jan Eichler, Pavel Hazdra, Miloslav Capek, Milos Mazanek
Jazyk:	angličtina
Rok vydání:	2012
Předmět:	Electrical engineering. Electronics. Nuclear engineering TK1-9971 Cellular telephone services industry. Wireless telephone industry HE9713-9715
Zdroj:	International Journal of Antennas and Propagation, Vol 2012 (2012)
Druh dokumentu:	article
ISSN:	1687-5869 1687-5877
DOI:	10.1155/2012/490327
Popis:	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.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/cc17de1a932b4108a7eaf42b57805820 Zobrazit plný text záznamu Plný text View record in DOAJ