@misc{indiciae6a492dbb6b14,
  title = {Multi-Band Frequency Selective Surface with Multi-Ring Patch Elements},
  author = {Wu, T-K. and Lee, S-W.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/20060039554},
  note = {Source identifier: 20060039554}
}