@misc{indiciae5dca24d82f27,
  title = {Beam shapes in a three-frequency upconverter},
  author = {Guha, S. and Falk, J. and See, Y.-C.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19810029846},
  note = {Source identifier: 19810029846}
}