Minimizing RF performance spikes in a cryogenic orthomode transducer (OMT)
| Autor: | Stephane Claude, Doug Henke |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Engineering
Cryogenics Millimeter-wave receivers Signal receivers Transducers Millimeter waves Radio receiver Polarization splitters Assembly features law.invention Turnstile law Polarization Electronic engineering Overall performance Electrical and Electronic Engineering Radio astronomy Leakage (electronics) Radiation Ortho-mode transducers business.industry Turnstile junctions Cryogenic temperatures Condensed Matter Physics Orthomode transducer Transducer Receiver noise Low cross polarization business Waveguide |
| Popis: | The turnstile junction exhibits very low cross-polarization leakage and is suitable for low-noise millimeter-wave receivers. For use in a cryogenic receiver, it is best if the orthomode transducer (OMT) is implemented in waveguide, contains no additional assembly features, and may be directly machined. However, machined OMTs are prone to sharp signal drop-outs that are costly to overall performance since they show up directly as spikes in receiver noise. We explore the various factors contributing to this degradation and discuss how the current design mitigates each cause. Final performance is demonstrated at cryogenic temperatures. |
| Databáze: | OpenAIRE |
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