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IntroductionA triangular patch antenna's major weaknessis its intrinsic narrow bandwidth.Some techniqueshave been suggested for widening its bandwidthsuch as the employmentof a thicker substrate witha coaxial feed[1] ,which will limit the achievablebandwidth due to the increased inductance of thelonger probe. Recently a novel feeding approachemploying an L- shaped probe has been devel-oped[2 ] ,butno numerical analysis has been provid-ed.Physically this L- shaped probe introduces a ca-pacitan… 相似文献
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文章分析了桥梁工程项目中伸缩缝的常见问题缺陷,从前期准备工作、槽口开挖处理、预埋筋处理、混凝土施工四个方面,探讨了伸缩缝施工技术的应用要点。 相似文献
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