@misc{indiciae0a8ca16d3496,
  title = {Realizable feed-element patterns and optimum aperture efficiency in multibeam antenna systems},
  author = {Yngvesson, K. S. and Rahmat-Samii, Y. and Johansson, J. F. and Kim, Y. S.},
  year = {1988},
  url = {https://ntrs.nasa.gov/citations/19890035099},
  note = {Source identifier: 19890035099}
}