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Algaas/gaas quasi-bulk effect mixers: analysis and experiments
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Agahi, F. Lau, K. M. Dai, D. Yngvesson, K. S. Musante, C. Grammer, W. Yang, J.-X. |
| Copyright Year | 1992 |
| Description | The lowest noise temperature for any receiver in the 0.5 to 1 THz range has been achieved with the bulk InSb hot electron mixer, which unfortunately suffers from the problem of having a very narrow bandwidth (1-2 MHz). We have demonstrated a three order of magnitude improvement in the bandwidth of hot electron mixers, by using the two-dimensional electron gas (2DEG) medium at the hetero-interface between AlGaAs and GaAs. We have tested both inhouse MOCVD-grown material, and MBE materials, with similar results. The conversion loss (L(sub c)) at 94 GHz is presently 18 dB for a mixer operating at 20 K, and calculations indicate that L(sub c) can be decreased to about 10 dB in future devices. Calculated and measured curves of L(sub c), versus PLO and IDC, respectively, agree well. We argue that there are several different configurations of hot electron mixers, which will also show wide bandwidth, and that these devices are likely to become important as low-noise THz receivers in the future. |
| File Size | 1021033 |
| Page Count | 18 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19930018594 |
| Archival Resource Key | ark:/13960/t9p31sv0m |
| Language | English |
| Publisher Date | 1992-01-01 |
| Access Restriction | Open |
| Subject Keyword | Electronics And Electrical Engineering Gallium Arsenides Metalorganic Chemical Vapor Deposition Receivers Bolometers Aluminum Gallium Arsenides Losses Hot Electrons Mixing Circuits Bandwidth Molecular Beam Epitaxy Low Noise Submillimeter Waves Noise Temperature Electron Gas Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
