@misc{indiciaedc37f6f0fd0d,
  title = {An experimental TE sub 12 - TE sub 11 circular waveguide mode converter},
  author = {Hoppe, D.},
  year = {1985},
  url = {https://ntrs.nasa.gov/citations/19860000920},
  note = {Source identifier: 19860000920}
}