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Commissioning of the NPL WR-05 waveguide network analyser system for S-parameter measurements from 140 GHz to 220 GHz.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Shoaib, Nosherwan Ridler, Nick Salter, Martin J. |
| Copyright Year | 2015 |
| Abstract | This report describes some investigations into the performance of the new NPL Vector Network Analyser (VNA) system in terms of scattering parameter (S-parameter) measurements from 140 to 220 GHz. Two types of investigation have been undertaken: (a) connection repeatability; and (b) a comparison of different calibration techniques. (a) For the connection repeatability investigation, four one-port devices were used: (i) a flush short-circuit; (ii) an offset short-circuit; (iii) a near-matched termination; and (iv) a mismatched termination. The experimental standard deviation was computed and used as the measure of variability in the measurement results due to flange connection repeatability. The repeatability analysis was performed separately on the real and imaginary components of the complex-valued linear voltage reflection coefficient (VRC). Isolation measurements, providing an indication of the VNA ‘noise floor’ for transmission measurements, were also made as part of this investigation. (b) For the comparison of the calibration techniques, several two-port calibration techniques were implemented using the available WR-05 waveguide standards. Two different classes of calibration technique were implemented: (i) three known one-port devices and a thru (i.e. the three-known-loads-thru (TKLT) technique); (ii) the ThruReflect-Line (TRL) and Line-Reflect-Line (LRL) techniques. A wide range of oneand two-port devices under test (DUTs) were measured during the comparison. Mechanical length measurements were also made on some of the oneand two-port DUTs. These length measurements have been used subsequently to compare with electrical length computations obtained using measurements from the different calibration techniques. 1 NPL Visiting Researcher from Department of Electronics and Communications, Politecnico Di Torino, Italy. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://ridler-pubs.webs.com/NMR_189.pdf |
| Alternate Webpage(s) | http://eprintspublications.npl.co.uk/6535/1/TQE12.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
