本文選題：雷達(dá)散射截面(RCS) + 微帶貼片天線��； 參考：《北京交通大學(xué)》2017年碩士論文

【摘要】：雷達(dá)隱身技術(shù)以其在現(xiàn)代軍事領(lǐng)域中的關(guān)鍵地位受到了廣泛的關(guān)注。隨著隱身技術(shù)的發(fā)展和成熟,天線這一類特殊散射體的散射問題成為制約其載體的總散射性能的關(guān)鍵。既要保證裝備間的正常通信,又不能使裝備被敵方雷達(dá)探測到,這就要求在保證天線輻射性能的前提下盡可能縮減其雷達(dá)散射截面(radar cross section,RCS)。以微帶貼片天線為代表的平面天線具有剖面低,重量輕,易共形等優(yōu)點,是高速飛行器上的常用天線。本文以矩形貼片天線為例,通過在其地板或輻射貼片周圍加載互補開口諧振環(huán)(Complementary Split Ring Resonator,CSRR),實現(xiàn)天線或天線陣的RCS減縮。研究成果對其他平面天線如縫隙天線等有一定的指導(dǎo)意義。本文的主要研究工作有:1.利用CSRR諧振時對散射波的偏轉(zhuǎn)作用及其對入射波的極化選擇性,在微帶天線地板上加載兩個擺放方向互相垂直的CSRR,實現(xiàn)了 x方向和y方向兩種極化的散射縮減;仿真結(jié)果與測試結(jié)果吻合。2.利用CSRR的諧振頻率與其周長的關(guān)系,在微帶天線非輻射邊的地板上加載兩不同莖長的CSRR,實現(xiàn)了一個寬頻帶的散射減縮,散射縮減頻帶范圍為2.48GHz-3.32GHz。3.在前述單段延伸莖CSRR的基礎(chǔ)上,設(shè)計了一種雙段延伸莖的CSRR,該結(jié)構(gòu)在兩個極化方向上分別增加一個諧振頻點,達(dá)到了雙CSRR的效果。利用反射相位差設(shè)計了一種正交棋盤結(jié)構(gòu)反射屏,其散射縮減頻帶為7.5GHz-14.5GHz,其中在9.4GHz-9.9GHz頻段,10.5GHz-11.2GHz 頻段以及13.8GHz-14.1GHz頻段,RCS縮減大于10dB。仿真實驗和實際測試的結(jié)果保持一致。4.將上述雙段延伸莖的CSRR棋盤結(jié)構(gòu)加載在微帶天線陣輻射貼片周圍,并組成天線陣,使得天線陣在多個頻段內(nèi)的RCS都得到減縮。
[Abstract]:Radar stealth technology has received extensive attention because of its key position in modern military field. With the development and maturity of stealth technology, the scattering problem of antenna, a special scatterer, becomes the key to restrict the total scattering performance of its carrier. It is necessary to ensure the normal communication between the equipment and not be detected by the enemy radar, which requires that the radar cross section (RCS) can be reduced as much as possible on the premise of ensuring the radiation performance of the antenna. The planar antenna, represented by microstrip patch antenna, has the advantages of low profile, light weight, easy conformal and so on. In this paper, taking rectangular patch antenna as an example, the RCS reduction of antenna or antenna array is realized by loading complementary Split Ring resonator or complementary Split Ring resonator around its floor or radiation patch. The research results have certain guiding significance for other planar antennas such as slot antennas. The main research work of this paper is: 1. Based on the deflection of the scattering wave and the polarization selectivity of the incident wave during the CSRR resonance, two vertical directions are loaded on the floor of the microstrip antenna, and the scattering reduction in the x direction and the y direction is realized. The simulation results agree with the test results. Based on the relationship between the resonant frequency and the perimeter of the CSRR, two different stem lengths are loaded on the floor of the non-radiating edge of the microstrip antenna, and a wide-band scattering reduction is realized, with a range of 2.48 GHz ~ 3.32 GHz 路3. On the basis of the single-segment extension stem CSRR, a two-segment extension stem CSRR is designed. The structure increases one resonant frequency point in two polarization directions and achieves the effect of double CSRR. Based on the reflection phase difference, an orthogonal chessboard structure reflection screen is designed. The scattering reduction frequency band is 7.5 GHz to 14.5 GHz, in which the 9.4GHz-9.9GHz band is 10.5GHz to 11.2GHz and the 13.8GHz-14.1GHz band is larger than 10 dB. The result of simulation experiment is consistent with that of actual test. The CSRR chessboard structure of the two-segment extension stem is loaded around the radiation patch of the microstrip antenna array and the antenna array is formed so that the RCS of the antenna array in multiple frequency bands can be reduced.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN822

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本文編號：1831979