In English

HBV diodes for THz applications

Design of a heterostructure barrier varactor frequency tripler for a 630 GHz output

Johanna Hanning
Göteborg : Chalmers tekniska högskola, 2011.
[Examensarbete på avancerad nivå]

In this thesis a HBV tripler for an output frequency of 630 GHz is developed. The designed HBV is based on the InGaAs/InAlAs/AlAs epitaxially grown on InP material system and will be realised using a MMIC microstrip circuit inside a waveguide block. The doping and layer structure impact on the cut-off frequency is evaluated as well as the effects of self-heating when choosing an appropriate structure. The circuit design in the complex topology is carried out through full electro-magnetic field FEM simulations in HFSS complemented by harmonic balance simulation and optimisation in ADS. The finished multiplier simulations indicate an output power above 1 mW for an input power of 40 mW, and a relative halfpower bandwidth of 9 % at 630 GHz. Limiting factors are self heating, limited available input power, and fabrication tolerances for mesa size and substrate dimensions.

Nyckelord: HBV, THz, frequency multipliers, tripler, terahertz sources, varactors, harmonic generation, submm, submillimeter

Publikationen registrerades 2011-03-16. Den ändrades senast 2013-04-04

CPL ID: 138055

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