Abstract
Planar Gunn diodes operating above 100 GHz fabricated in GaAs/AlGaAs heterojunction structures with single and double d-doping layers on each side of GaAs channel are numerically studied and experimentally demonstrated. The results show enhanced RF power and oscillation frequency when double d-doping technique was used. By using a two-dimensional numerical simulation tool, the conduction band profile, electron concentration in the epitaxy layers and current-voltage characteristics are investigated. Simulation results indicate that extra d-doping layers increase electron confinement in the conducting channel, therefore higher current levels are obtained. Simulated current-voltage characteristics in both cases agree well with experimental results
Original language | English |
---|---|
Pages (from-to) | 1624-1626 |
Number of pages | 3 |
Journal | Microwave and Optical Technology Letters |
Volume | 53 |
Issue number | 7 |
Early online date | 22 Apr 2011 |
DOIs | |
Publication status | Published - Jul 2011 |