【摘要】：頻率選擇表面(Frequency Selective Surface,FSS)是一種人工電磁周期結(jié)構(gòu),其頻率響應(yīng)具有特殊的頻率選擇特性,可以對(duì)特定頻率的電磁波進(jìn)行反射或者透射,帶內(nèi)傳輸/反射損耗小,帶寬和諧振頻率等指標(biāo)可控性好。因此,FSS自從問世以來就受到了廣泛且持續(xù)的關(guān)注。雖然FSS的報(bào)道文獻(xiàn)較多,但是多數(shù)集中于對(duì)單層FSS形狀的研究及小型化實(shí)現(xiàn)策略。對(duì)于實(shí)際具有重要工程應(yīng)用價(jià)值的多層級(jí)聯(lián)FSS的文獻(xiàn)報(bào)道并不多。此外,在一些新興的應(yīng)用中,往往要求FSS有更好的表現(xiàn),如具有寬帶帶外抑制的帶通型FSS和圓極化波工作方式的FSS,這些研究方向有待進(jìn)一步探討。根據(jù)現(xiàn)有FSS的發(fā)展情況和新的工程應(yīng)用需求,本文以帶通型寬阻帶FSS和帶通型圓極化FSS為兩個(gè)基本設(shè)計(jì)目標(biāo),基于等效電路模型方法,對(duì)所提出的FSS工作原理和設(shè)計(jì)方法進(jìn)行了深入的研究和分析。本文的主要內(nèi)容安排如下:首先,本文介紹了FSS的研究背景和研究意義。根據(jù)FSS的應(yīng)用場(chǎng)景,對(duì)國內(nèi)外FSS的發(fā)展動(dòng)態(tài)進(jìn)行了分類、梳理。其中,對(duì)目前幾種熱門應(yīng)用,簡要地分析了FSS的工作原理,總結(jié)了這些設(shè)計(jì)中的創(chuàng)新點(diǎn)和不足之處,這為本文的相關(guān)研究提供了參照和依據(jù)。其次,在分析了傳統(tǒng)諧振型單元在寬阻帶FSS設(shè)計(jì)方面的劣勢(shì)后,本文采用了新穎的非諧振型級(jí)聯(lián)單元作為設(shè)計(jì)基礎(chǔ),并且合理設(shè)計(jì)單元中的介質(zhì)分布,實(shí)現(xiàn)了帶通型寬阻帶FSS的設(shè)計(jì)目標(biāo)。此外,文中還分析了非諧振型級(jí)聯(lián)單元多層金屬層之間的陣列干涉現(xiàn)象。仿真結(jié)果表明,本文設(shè)計(jì)的帶通型寬阻帶FSS具有通帶插損小、矩形系數(shù)高和帶外抑制頻帶寬等優(yōu)良特性。對(duì)于K波段帶通型圓極化FSS設(shè)計(jì),本文首先理論分析了單層方槽單元的TE和TM極化波響應(yīng)一致性對(duì)入射角和單元幾何尺寸的依賴關(guān)系。然后,采用雙層方槽級(jí)聯(lián)結(jié)構(gòu),結(jié)合等效電路模型優(yōu)化方法,獲得了最終設(shè)計(jì)結(jié)果。在0°~60°入射角域,通帶內(nèi)圓極化波的插損和軸比均小于1dB。并且對(duì)這一款FSS進(jìn)行了加工和測(cè)試,測(cè)試曲線和仿真結(jié)果吻合良好。最后,在線極化帶通型寬阻帶FSS的基礎(chǔ)上,將原始的網(wǎng)柵電感層替換為一種新穎的螺旋曲折線電感層,設(shè)計(jì)了帶通型寬阻帶圓極化FSS。通過FSS的等效電路模型進(jìn)行優(yōu)化,最終實(shí)現(xiàn)了在L/S波段圓極化波的優(yōu)良傳輸特性和5~25GHz寬頻帶范圍內(nèi)的阻帶抑制效果。
[Abstract]:Frequency selective surface (Frequency Selective Surface,FSS) is a kind of artificial electromagnetic periodic structure. Its frequency response has special frequency selection characteristics, it can reflect or transmit electromagnetic waves at specific frequency, and the in-band transmission / reflection loss is small. Bandwidth and resonance frequency and other indicators of good controllability. Therefore, FSS has received extensive and continuous attention since its inception. Although there are many reports on FSS, most of them focus on the shape of monolayer FSS and miniaturization strategy. There are few reports on multilayer cascaded FSS with important engineering application value. In addition, in some new applications, FSS is often required to perform better, such as band-pass FSS with broadband out-of-band suppression and FSS, with circular polarization wave. According to the development of the existing FSS and the new engineering application requirements, this paper takes the band-pass wide stopband FSS and the band-pass circularly polarized FSS as the two basic design objectives, based on the equivalent circuit model method. The working principle and design method of FSS are deeply studied and analyzed. The main contents of this paper are as follows: first, this paper introduces the research background and significance of FSS. According to the application scene of FSS, the development trends of FSS at home and abroad are classified and combed. The working principle of FSS is briefly analyzed, and the innovation and deficiency of these designs are summarized, which provides a reference and basis for the relevant research in this paper. Secondly, after analyzing the disadvantages of traditional resonant elements in wide stopband FSS design, a novel non-resonant cascade element is used as the design basis, and the media distribution in the design unit is reasonable. The design goal of band-pass wide stopband FSS is realized. In addition, the array interference between multilayer metal layers of non-resonant cascaded cells is analyzed. The simulation results show that the band-pass wide stopband FSS designed in this paper has the advantages of low bandpass insertion loss, high rectangular coefficient and out-of-band suppression bandwidth. For the design of K-band bandpass circularly polarized FSS, the dependence of the response of TE and TM polarization waves on the incident angle and the geometric size of the element is theoretically analyzed in this paper. Then, the final design results are obtained by adopting the cascade structure of double-layer square groove and combining with the optimization method of equivalent circuit model. In the range of 0 擄~ 60 擄incident angle, the insertion loss and axial ratio of circular polarization wave in the passband are less than 1 dB. The FSS is machined and tested, and the test curve is in good agreement with the simulation results. Finally, on the basis of on-line polarization bandpass wide stopband FSS, the original grid gate inductance layer is replaced by a novel spiral zigzag line inductor layer, and a bandpass wide stopband circularly polarized FSS. is designed. Through the optimization of the equivalent circuit model of FSS, the excellent transmission characteristics of circular polarization wave in L / S band and the effect of stopband suppression in the wide band range of 5~25GHz are realized.
【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】：2017
【分類號(hào)】：TN713

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 左育申;;雙排金屬螺釘加栽的圓極化器設(shè)計(jì)與調(diào)試[J];火控雷達(dá)技術(shù);1987年04期

2 周寄石;關(guān)于傳輸型圓極化裝置的設(shè)計(jì)[J];長沙水電師院(自然科學(xué)學(xué)報(bào));1988年02期

3 馬升榮;;ECM寬帶雙圓極化喇叭天線的設(shè)計(jì)[J];電子對(duì)抗技術(shù);1988年01期

4 葉為文;;圓極化信號(hào)的性質(zhì)和它的應(yīng)用[J];電視技術(shù);1988年05期

5 周寄石;;關(guān)于傳輸型圓極化裝置的設(shè)計(jì)[J];長沙水電師院學(xué)報(bào)(自然科學(xué)版);1988年02期

6 李麗華;廖成;楊丹;;線極化波和圓極化波與腔體的耦合比較[J];現(xiàn)代電子技術(shù);2010年03期

7 劉建斌;;矩形波導(dǎo)窄邊非諧振縫隙圓極化波的合成[J];火控雷達(dá)技術(shù);1984年04期

8 丁丁,龔克;圓極化波室內(nèi)傳播特性研究[J];電波科學(xué)學(xué)報(bào);1999年03期

9 敖s，

本文編號(hào)：2351632