Calibration Technique for THz Time-Domain Spectrometers Enabling Vectorial Scattering Parameter Measurements
| Autor: | Susanne Brandl, Christian Damm, Christian Waldschmidt, Philipp Hinz, Mario Mueh |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Spectrometer business.industry Scattering Terahertz radiation Instrumentation 020206 networking & telecommunications 02 engineering and technology Condensed Matter Physics Optics 0202 electrical engineering electronic engineering information engineering Scattering parameters Calibration Time domain Electrical and Electronic Engineering Wideband business |
| Zdroj: | IEEE Microwave and Wireless Components Letters. 31:805-807 |
| ISSN: | 1558-1764 1531-1309 |
| DOI: | 10.1109/lmwc.2021.3062679 |
| Popis: | To date, the most proficient instrument type for rapid measurements of broadband terahertz (THz) spectra is the time-domain spectrometer, which acquires the RF signal either transmitted through or reflected by a sample without following a standardized method for calibration. Simultaneously, application-oriented research drives a strong need for fast and precise instrumentation capable of capturing well-established characteristics, such as scattering parameters. In this letter, a robust THz instrument capable of synchronously measuring transmission and reflection from 150 GHz to 3 THz is implemented and evaluated. The main sources of error in the system are characterized, and an adapted network analysis calibration scheme for magnitude- and phase-correct wideband scattering parameter measurements is proposed. Finally, the method is validated in a comparison of simulation and measurement of a known sample. |
| Databáze: | OpenAIRE |
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