雙模曲折懸置帶線環(huán)四極微波濾波器
4-pole microwave filters using dual-mode meander suspensive strip line loop resonators
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摘要: 該文研制了雙模曲折懸置帶線環(huán)四極微波濾波器。采用全波技術(shù)對(duì)該種濾波器特性進(jìn)行的計(jì)算表明,它具有優(yōu)良的窄通帶、高選擇性和小體積,與同類(lèi)型二極濾波器相比,過(guò)渡帶更陡峭。采用優(yōu)化設(shè)計(jì)方法設(shè)計(jì)出了濾波器電路尺寸,制造了以r=2.8的Teflon為介質(zhì)基片的濾波器,測(cè)試得到的雙模曲折懸置帶線四極濾波器的中心頻率為f0=1.194 GHz,△f=19.4 MHz,通帶插入損耗LP4.3 dB,阻帶衰減Ls50 dB,實(shí)驗(yàn)結(jié)果和CAD預(yù)測(cè)作了比較,兩者基本一致。這種濾波器可望在多種微波系統(tǒng)和移動(dòng)通信系統(tǒng)中應(yīng)用。
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關(guān)鍵詞:
- 雙模曲折懸置線環(huán)濾波器; 平面微波濾波器; 微波濾波器
Abstract: The 4-pole microwave filters using dual-mode meander suspensive strip line loop resonators have been developed. The results of the full wave analysis of the filters have shown that 4-pole filters have better performance than the 2-pole fiilters of same type. A 4-pole filter of this type on r= 2.8 Teflon substrate having a bandwidth △f=19.4MHz at the central frequency f0 = 1.194GHz was designed and fabricated. The measured filter performance was compared with the prediction of CAD tool. The agreement was found to be good. -
J. A. Curtis, S. J. Fiedziuszko, Miniature dual-mode microstrip filters, IEEE 1991 MTT-S Dig.,443-446.[2]J. S. Hong, M.J. Lancaster, Bandpass characteristics of new dual-mode microstrip square loop resonators, Electron. Lett., 1995, 31(11), 891-892.[3]J.S. Hong, M. J. Lancaster, Microstrip bandpass filters using degenerate modes of a novel meander loop resonator, IEEE Microwave and Guided Wave Lett., 1995, 5(11), 371-372..[4]Z.M. Hejazi, P. S. Excell, Z. Jiang, Compact dual-mode filters for HTS Satellite systems, IEEE Microwave ＆ Guided Lett., 1998, 8(8), 275 277.[5]姜遵富,Z.M Hejazi,P S.Excell,新型高溫超導(dǎo)(HTS)雙模多次曲折微帶環(huán)窄帶濾波器,電子學(xué)報(bào),2000,28(2),1-3[6]G.L. Mathau, L. Young, E. M. T. Jones, Microwave Filters, Impedance-Matching Network and Coupling Structures, Dedham, MA. Artech House, 1980, 664-665. -
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