A Method for Accurately Characterizing Single Overmoded Circular TM01-TE11 Mode Converter
| Autor: | Yingjun Liu, Xinhong Cui, Zhiqiang Zhang, Wenxi Hao, Jianguo Wang, Xiaoxin Zhu, Junkai Yan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Offset (computer science) offset waveguide General Computer Science business.industry S-parameter General Engineering Mode (statistics) mode generator Converters overmoded mode converter law.invention Radiation pattern Generator (circuit theory) Optics de-embedding law Cascade Asymmetric fixture General Materials Science lcsh:Electrical engineering. Electronics. Nuclear engineering business Waveguide lcsh:TK1-9971 Smoothing |
| Zdroj: | IEEE Access, Vol 8, Pp 113383-113391 (2020) |
| ISSN: | 2169-3536 |
| Popis: | In the case of characterizing waveguide mode converter, the widely applied back-to-back method can only extract two mode converters' joint S-parameters, the accuracy of the far-field radiation pattern method is limited. This paper experimentally demonstrates a method for accurately characterizing single circular TM01-TE11 mode converter, which consists of extracting the asymmetric two-port TM01 and TE11 mode generator test fixtures' S-parameters and de-embedding them from the “TM01 mode generator + TM01-TE11 mode Converter + TE11 mode generator” cascade measurement results. The peak problem occurring in measuring overmoded circular waveguide devices with VNA is analyzed and settled with an offset waveguide based peak-shifting tactic plus the Loess smoothing method. Fairly good agreement between the simulated and finally extracted complex S-parameter matrix of a TM01-TE11 mode converter throughout the device's working frequency span validates the proposed method's merits over traditional methods. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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