Multiband Multiple Ring Monopole Antennas

Research output: Contribution to journalArticle

Colleges, School and Institutes


This paper proposes two novel designs of a multiband antenna using multiple rings. The first design consists of a set of self-similar circular rings. This is an alternative to the recently reported triangular fractal Sierpinski gasket monopole antenna, and comparison is made to this and the circular disk monopole antenna. The second design is realized by varying the shape of the circular structure to an elliptical one. Larger bandwidth and improved patterns are achieved. In comparison to the circular disk, improved radiation pattern control at higher operating bands, due to the discrete structure of the multiple rings, is shown by numerical and experimental results. The bandwidth is significantly larger than the Fractal Sierpinski gasket and Parany monopole.


Original languageEnglish
Pages (from-to)722-729
Number of pages8
JournalIEEE Transactions on Antennas and Propagation
Issue number4
Publication statusPublished - 1 Apr 2003


  • monopole antenna, multiband antenna, fractal antenna