文章基本信息

标题：Influence of Manufacturing Tolerancies on Central Frequency of a Narrow Band E-Plane Waveguide Filter
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作者：M. Rakić ; B. Jokanović ; Dj. Budimir 等
期刊名称：Microwave Review
印刷版ISSN：1450-5835
出版年度：2004
卷号：10
期号：1
出版社：Society for Microwave Technique, Technologies and Systems, Serbia and Montenegro IEEE MTT-S Chapter
摘要：The aim of this work is to master the design of a narrow band waveguide E-plane filter for Ku band that will not need to be adjusted in serial production, therefore its center frequency should be exact. This paper presents the procedure for designing a filter with inserted metal septa and investigates the repeatability of its characteristics with respect to tolerances of both the w aveguide housing and the metal septa. It has been shown that longer waveguide's dimension (a) has the greatest influence upon filter's central frequency and it has to be precise w ithin limits of 0.1mm. It has also been found that other influences (waveguide's height tolerances (b), unequal dimensions of the halves (a/2), as well as unsymmetrical fitting of w aveguide's halves along E-field direction) could be neglected. These findings have been used to obtain the filter that has the center frequency fc=12.764GHz, which is only 1MHz less then demanded. Measured insertion loss in passband is 0.55dB