C.-W. Ling, W.-H. Lo, R.-H. Yan, S.-J. Chung, Planar Binomial Curved Monopole Antennas for Ultrawideband Communication ", IEEE Transactions on Antennas and Propagation, Volume: 55 Issue: 9, Sept. 2007, Page(s): 2622-2624
The publication is available in the attachments area.