本文關(guān)鍵詞： 無源器件 多通帶濾波器 復(fù)合左右手傳輸線 缺陷地結(jié)構(gòu) 多模式諧振　出處：《電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：為了提高通信效率,減小設(shè)備體積,節(jié)約加工成本,現(xiàn)代通信技術(shù)對(duì)多頻帶工作提出了更高的要求。多頻帶濾波器是現(xiàn)代通信系統(tǒng)中的關(guān)鍵部件,因此,本文對(duì)多頻帶濾波器的研究是具有實(shí)際意義的。本文針對(duì)采用復(fù)合左右手傳輸線和缺陷地這兩種結(jié)構(gòu)的濾波器進(jìn)行了研究,取得了一定的成果,主要的研究工作和創(chuàng)新點(diǎn)如下:1.提出了采用橫向并聯(lián)結(jié)構(gòu)和T型復(fù)合左右手諧振器結(jié)構(gòu)相結(jié)合的濾波器,利用其零階和正1階兩點(diǎn)的諧振模式產(chǎn)生傳輸極點(diǎn),減小插損,同時(shí)抑制負(fù)階模式,增強(qiáng)了帶外抑制,研制出了一支三通帶和一支四通帶濾波器。采用復(fù)合左右手材料制成的濾波器具有負(fù)折射率,平面透鏡成像,反多普勒效應(yīng),反切倫科夫輻射,負(fù)光壓等等優(yōu)點(diǎn),受到了許多國(guó)內(nèi)外學(xué)者的研究。復(fù)合左右手傳輸線在復(fù)合左右手材料的基礎(chǔ)上發(fā)展而來,具有負(fù)階,零階和正階這三種諧振模式,能夠很好的應(yīng)用于多通帶濾波器的設(shè)計(jì)中。2.提出了采用三角蘑菇型復(fù)合左右手諧振器結(jié)構(gòu)和S型非對(duì)稱缺陷地結(jié)構(gòu)相結(jié)合的濾波器,進(jìn)一步增強(qiáng)帶外抑制,研制出了一支雙通帶濾波器。提出了采用交指電容蘑菇混合型復(fù)合左右手諧振器和開口諧振環(huán)型缺陷地結(jié)構(gòu)相結(jié)合的濾波器,利用其正1階諧振頻率,抑制相鄰的0階和正2階諧振模式,減小了帶內(nèi)插損,研制出了一支單通帶濾波器。采用缺陷地結(jié)構(gòu)的濾波器能夠產(chǎn)生電磁帶隙,具有帶外抑制好,電路體積小,便于集成等優(yōu)點(diǎn)。這種結(jié)構(gòu)基于光子晶體的工作原理,在微帶電路板底片上刻蝕周期或非周期的圖案,改變微帶線的分布電容和電感,使得特定頻率的電磁波在傳播過程中相消,形成傳播禁帶,能夠提高濾波器通帶與通帶之間的隔離度。上述兩種濾波器經(jīng)過實(shí)測(cè),達(dá)到了預(yù)期指標(biāo),驗(yàn)證了理論分析的正確性,完成了研究任務(wù)。
[Abstract]:In order to improve communication efficiency, reduce the volume of equipment and save processing cost, modern communication technology put forward higher requirements for multi-band operation. Multi-band filter is a key component in modern communication system. In this paper, the study of multi-band filter is of practical significance. In this paper, two kinds of filters with composite left-hand transmission line and defective ground are studied, and some achievements have been made. The main research work and innovation are as follows: 1. A filter combining the transverse parallel structure and the T-type composite left-right resonator structure is proposed. The resonant modes of zero order and positive first order are used to generate transmission poles, to reduce the insertion loss, and to suppress the negative order mode, so that the out-of-band suppression is enhanced. A three-way band filter and a four-pass band filter are developed. The filter made of composite left-hand material has negative refractive index, plane lens imaging, anti-Doppler effect and anti-Cherenkov radiation. The advantages of negative photovoltage have been studied by many scholars at home and abroad. The compound left-right hand transmission line is developed on the basis of the composite left-hand material, which has three resonant modes: negative order, zero order and positive order. It can be well used in the design of multi-pass band filter. A new filter combining triangular mushroom compound left-right resonator structure and S-type asymmetric defect ground structure is proposed to further enhance out-of-band suppression. A double pass band filter is developed. A hybrid left and right hand resonator with interDigital capacitance is proposed, which is combined with an open resonant ring defect ground structure, and its positive first order resonant frequency is used. A single pass band filter is developed by suppressing the adjacent 0 and 2 order resonant modes and reducing the band insertion loss. The filter with defective ground structure can produce electromagnetic band gap and has good suppression out of band. The structure is based on the principle of photonic crystal and etched periodic or aperiodic patterns on the microstrip circuit board to change the distribution capacitance and inductance of the microstrip line. The special frequency electromagnetic wave is eliminated in the process of propagation, and the propagation band gap can be formed, which can improve the isolation between the pass band and the pass band of the filter. The two kinds of filters have been measured and the expected targets have been achieved. The correctness of the theoretical analysis is verified and the research task is completed.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN811;TN713

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