Broadband heterodyne detection of terahertz‐waves using rectangular‐waveguide‐input Fermi‐level managed barrier diode module
| Autor: | Tadao Ishibashi, Hiroshi Ito |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Terahertz radiation business.industry Preamplifier Local oscillator 020208 electrical & electronic engineering Bandwidth (signal processing) 02 engineering and technology Intermediate frequency Broadband 0202 electrical engineering electronic engineering information engineering Optoelectronics Heterodyne detection Electrical and Electronic Engineering business Diode |
| Zdroj: | Electronics Letters. 55:905-907 |
| ISSN: | 1350-911X 0013-5194 |
| DOI: | 10.1049/el.2019.1803 |
| Popis: | A zero-biased Fermi-level managed barrier diode that was packaged with a WR-3 rectangular-waveguide-input port was developed. For direct (square-law) detection operations, the fabricated module exhibited a 3 dB bandwidth covering the whole WR-3 band. The intermediate frequency bandwidth in heterodyne detection was, therefore, dominated by the bandwidth of the integrated preamplifier, and it was measured to be about 40 GHz. The minimum noise-equivalent power obtained was as low as 7 × 10 -18 W/Hz at around 300 GHz even with a very low local oscillator power of 30 μW. |
| Databáze: | OpenAIRE |
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