@misc{indiciae877cede6396e,
  title = {Progress on single barrier varactors for submillimeter wave power generation},
  author = {Nilsen, Svein M. and Groenqvist, Hans and Hjelmgren, Hans and Rydberg, Anders and Kollberg, Erik L.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19930018547},
  note = {Source identifier: 19930018547}
}