Transmission line mode analysis of wideband/multiband antennas consisting of coupled conductors

Author

Noguchi, Keisuke ; Betsudan, S. ; Makino, Shigeru ; Hirota, Tetsuo ; Itoh, Kenji

Author_Institution

Div. of Electr. Eng., Kanazawa Inst. of Technol., Nonoichi, Japan

fYear

2013

fDate

9-13 Sept. 2013

Firstpage

272

Lastpage

275

Abstract

Transmission line mode theory is used to analyze wideband/multiband small antennas consisting of several conductors. First, the modal theory is introduced with equations in order to implement the theory to antenna analysis. Eigenvalue and eigenvector matrices generated by the theoretical calculation are shown. As an example of simple analysis, ILA with a folded structure consisting of two-wire (FILA) is analyzed, and the validation of the theory is discussed. A circuit model of the FILA is used to obtain the impedance characteristics, and the relationship between the FILA and the modal theory is explained. Finally, a dual-band FILA is designed and the impedance characteristics calculated by the modal theory and simulation is compared.

Keywords

broadband antennas; eigenvalues and eigenfunctions; matrix algebra; transmission line theory; dual-band FILA; eigenvector matrices; folded structure; modal theory; multiband small antenna; transmission line mode analysis; wideband small antenna; Antenna theory; Broadband antennas; Equations; Impedance; Mathematical model; Power transmission lines; Transmission line matrix methods;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation in Wireless Communications (APWC), 2013 IEEE-APS Topical Conference on

Conference_Location

Torino

Type

conf

DOI

10.1109/APWC.2013.6624881

Filename

6624881