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Träfflista för sökning "WFRF:(Dillner Lars 1968) srt2:(1999)"

Sökning: WFRF:(Dillner Lars 1968) > (1999)

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  • Hollung, Stein, 1970, et al. (författare)
  • A 141-GHz Integrated Quasi-Optical Slot Antenna Tripler
  • 1999
  • Ingår i: IEEE Antennas and Propagation Society International Symposium. - 078035639X ; 4, s. 2394-2397
  • Konferensbidrag (refereegranskat)abstract
    • We present a quasi-optical frequency tripler with heterostructure barrier varactor (HBV) diodes soldered across two slot antennas and located at the focal plane of a dielectric lens. The slot antennas are fed from a WR-22 waveguide connected to a Gunn oscillator. A quasi-optical high-pass filter is used to tune the slot impedance and increase the conversion efficiency. The symmetric capacitance-voltage and asymmetric current-voltage characteristics of the HBV diodes only allows odd harmonics of the applied signal to be generated, and thus simplifies the frequency tripler design.
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4.
  • Hollung, Stein, 1970, et al. (författare)
  • A 141-GHz Quasi-Optical HBV Diode Frequency Tripler
  • 1999
  • Ingår i: Tenth International Symposium on Space Terahertz Technology. ; , s. 492-500
  • Konferensbidrag (refereegranskat)abstract
    • A 141-GHz quasi-optical heterostructure barrier varactor (HBV) diode frequency tripler is presented. The tripler consists of two slot antennas loaded with FEW diodes and located at the focal plane of a dielectric lens. A quasi-optical high-pass filter is used at the output to improve the conversion efficiency and act as a tuning element for the slot antennas. The tripler demonstrates an effectively isotropic radiated power (EIRP) of 2.24 W at 141 GHz with an input power of 143 mW. The corresponding radiated power is 11.5 mW and the tripler conversion efficiency is about 8%.
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5.
  • Stake, Jan, 1971, et al. (författare)
  • Improved Diode Geometry for Planar Heterostructure Barrier Varactors
  • 1999
  • Ingår i: Tenth International Symposium on Space Terahertz Technology. ; , s. 485-491
  • Konferensbidrag (refereegranskat)abstract
    • We report state-of-the-art performance of tripler efficiency and output power for a new design of AlGaAs-based heterostructure barrier varactor diodes. The new diodes were designed for reduced thermal resistance and series resistance. An efficiency of 4.8% and a maximum output power of 4 mW was achieved at an output frequency of 246 GHz.
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  • Resultat 1-5 av 5

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