@misc{indiciae25467bec6898,
  title = {Antenna pattern control using impedance surfaces},
  author = {Balanis, Constantine A. and Liu, Kefeng and Tirkas, Panayiotis A.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19940009326},
  note = {Source identifier: 19940009326}
}