{"title":"用电磁仿真方法研究短节调谐器的大功率限制","authors":"V. Bilik, J. Bezek","doi":"10.1109/COMITE.2008.4569901","DOIUrl":null,"url":null,"abstract":"Two effects limiting high-power performance of a 2.45-GHz R26-waveguide stub tuner have been investigated by means of electromagnetic simulation: electric breakdown and microwave power dissipation in tuning stub. In the case of electric breakdown, increasing rounding radius of the stub edge from 1 mm to 4 mm was found to decrease maximum electric field strength 2.25- times, leading to fivefold increase of tuner power-handling capacity. Estimation of power dissipated in the tuning stub, based on average surface current density and stub conductivity, shows that stub overheating is not the most critical limiting factor. The described methodology can be applied to any type of waveguide and tuning stub structure.","PeriodicalId":306289,"journal":{"name":"2008 14th Conference on Microwave Techniques","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2008-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"Investigation of High-Power Limits of Stub Tuners by Means of Electromagnetic Simulation\",\"authors\":\"V. Bilik, J. Bezek\",\"doi\":\"10.1109/COMITE.2008.4569901\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Two effects limiting high-power performance of a 2.45-GHz R26-waveguide stub tuner have been investigated by means of electromagnetic simulation: electric breakdown and microwave power dissipation in tuning stub. In the case of electric breakdown, increasing rounding radius of the stub edge from 1 mm to 4 mm was found to decrease maximum electric field strength 2.25- times, leading to fivefold increase of tuner power-handling capacity. Estimation of power dissipated in the tuning stub, based on average surface current density and stub conductivity, shows that stub overheating is not the most critical limiting factor. The described methodology can be applied to any type of waveguide and tuning stub structure.\",\"PeriodicalId\":306289,\"journal\":{\"name\":\"2008 14th Conference on Microwave Techniques\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2008-04-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2008 14th Conference on Microwave Techniques\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/COMITE.2008.4569901\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2008 14th Conference on Microwave Techniques","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/COMITE.2008.4569901","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Investigation of High-Power Limits of Stub Tuners by Means of Electromagnetic Simulation
Two effects limiting high-power performance of a 2.45-GHz R26-waveguide stub tuner have been investigated by means of electromagnetic simulation: electric breakdown and microwave power dissipation in tuning stub. In the case of electric breakdown, increasing rounding radius of the stub edge from 1 mm to 4 mm was found to decrease maximum electric field strength 2.25- times, leading to fivefold increase of tuner power-handling capacity. Estimation of power dissipated in the tuning stub, based on average surface current density and stub conductivity, shows that stub overheating is not the most critical limiting factor. The described methodology can be applied to any type of waveguide and tuning stub structure.
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