Hansen, W. W.; Woodyard, J. R. (1938). "A new principle in directional antenna design". Proceedings of the Institute of Radio Engineers. 26 (3): 333–345. doi:10.1109/jrproc.1938.228128. S2CID51637970.
semanticscholar.org
api.semanticscholar.org
Hansen, W. W.; Woodyard, J. R. (1938). "A new principle in directional antenna design". Proceedings of the Institute of Radio Engineers. 26 (3): 333–345. doi:10.1109/jrproc.1938.228128. S2CID51637970.
