一種新型介質(zhì)諧振器帶通濾波器
A NEW TYPE BAND-PASS FILTERS USING DIELECTRIC RESONATORS
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摘要: 本文闡述一種能與微波集成電路結(jié)合使用的新型介質(zhì)諧振器帶通濾波器。這種濾波器是目前能用于微波集成電路的性能最佳的一種窄帶濾波器。本文對這種濾波器作了理論分析;并導出了有關(guān)濾波器設計的主要公式;給出了一至四諧振器帶通濾波器的實測性能。例如:一個相對帶寬為 0.2％的 5cm三諧振器濾波器,其帶內(nèi)插損為 0.8dB左右,帶外衰減大于50dB,30dB與 3dB的帶寬比約為 3.3。
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關(guān)鍵詞:
Abstract: Miniature narrow band filters with high performance can be formed by means of high Q and low temperature coefficient dielectric resonators, such as barium titanate, which are reasonably placed in a cut-off waveguide and properly excited. This paper describes a new type dielectric resonator band-pass filter which can be combined with MIC. At present, this kind of filter is the best one of the filters used in MIC. It has been shown, for example, that a 5 cm band-pass filter using three dielectric resonators with relative bandwidth of 0.2% has an insertion loss of about 0.8 dB, the attenuation outside the band over 50 dB, and the ratio of 30 dB to 3 dB bandwidth approximately 3.3. This filter has been theoretically analysed, and some interesting formulae are derived. The practical measured performances for 1-to 4-resonator band-pass filters are presented. -
W. Harrison, IEEE Trans. on Microwave Theory Tech., MTT-16(1968), 218.[2]S. B. Colin, IEEE Trans. on Microwave Theory Tech.,MTT-16(1968), 210.[4]顧其諍,應用介質(zhì)諧振腔的微帶帶通濾波器,(內(nèi)部資料)1971年5月.[5]T. D. Iveland, IEEE Trans. on Microwave Theory Tech., MTT-19(1971), 643.[9]顧其諍,微波理論與技術(shù)(論文集),科學出版社,1980, 139-152頁. -
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