A multi-element 150/300 GHz spatial power dividing/combining frequency doubler

@article{Schumann2002AM1,
  title={A multi-element 150/300 GHz spatial power dividing/combining frequency doubler},
  author={Brigitte Schumann and Michael Hoft and Rolf Judaschke},
  journal={2002 IEEE MTT-S International Microwave Symposium Digest (Cat. No.02CH37278)},
  year={2002},
  volume={3},
  pages={1539-1542 vol.3}
}
A five-element frequency doubler at 300 GHz in a quasi-optical spatial power dividing/combining circuitry has been investigated. The individual frequency doublers are realized with GaAs-Schottky-diodes in waveguide technique with 4% efficiency. Holography is applied to achieve efficient power transfer to/from the active devices. Preliminary measurements are in good agreement with the expected system performance. 

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