@misc{indiciae13aadf5d58e5,
  title = {A 200 GHz tripler using a single barrier varactor},
  author = {Choudhury, Debabani and Frerking, Margaret A. and Batelaan, Paul D.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19930068231},
  note = {Source identifier: 19930068231}
}