本文關(guān)鍵詞：微帶天線及天線陣列RCS縮減研究　出處：《北京交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 微帶天線 散射 雷達(dá)散射截面 開槽 短路針 共面緊湊型電磁帶隙結(jié)構(gòu)

【摘要】：目標(biāo)的隱身性能在現(xiàn)代電子戰(zhàn)中起著十分重要的作用,它是提高自身突防能力和安全性的重要因素。天線作為一種特殊的散射體,其高增益意味著它將是其載體散射的主要來源之一,因此如何降低天線系統(tǒng)的散射對于提高整個(gè)平臺(tái)的隱身性能來說至關(guān)重要。同時(shí),為了保證天線的正常工作,在降低天線散射的同時(shí)必須要確保天線輻射性能不受到影響,因此常規(guī)的隱身措施,例如涂覆吸波材料無法應(yīng)用在天線上。本文針對微帶天線及陣列天線RCS縮減技術(shù)進(jìn)行了研究,提出了兩種減小微帶天線及天線陣列RCS的有效方法,研究了這兩種方法在微帶天線RCS縮減中的應(yīng)用并設(shè)計(jì)了低散射的微帶天線及陣列天線。研究表明,這些方法的應(yīng)用不僅能夠有效降低微帶天線及天線陣的RCS,同時(shí)還能基本保持微帶天線及天線陣的輻射性能。 本論文的主要工作可以歸納為以下三點(diǎn)： 1.研究了矩形微帶天線的基本結(jié)構(gòu)和原理,根據(jù)微帶天線腔模理論分析,分別研究了開槽技術(shù)和加載短路針技術(shù)對微帶天線輻射性能和散射性能的影響,并將這兩種方法綜合運(yùn)用到微帶天線上,通過抑制微帶天線的高次模的方式來減小其RCS,綜合運(yùn)用這兩種方法既能夠顯著降低微帶天線帶外的RCS,又不影響天線的正常工作。 2.研究分析了共面型電磁帶隙結(jié)構(gòu)(UC-EBG)的特性,并利用其帶阻特性和同相反射特性對微帶天線的RCS進(jìn)行縮減。在微帶天線輻射貼片周圍加載UC-EBG結(jié)構(gòu),設(shè)計(jì)了一種低散射的微帶天線,并分析了入射平面波不同的極化方式情況下,加載的UC-EBG結(jié)構(gòu)對微帶天線單站RCS和雙站RCS的影響。仿真結(jié)果顯示,低散射微帶天線帶內(nèi)的后向散射降幅達(dá)13dBsm,并且微帶天線的輻射特性保持不變。這表明這種方法是一種有效減小微帶天線RCS的設(shè)計(jì)方法。 3.利用UC-EBG結(jié)構(gòu)對微帶天線RCS縮減的研究結(jié)果,分別針對帶內(nèi)和帶外RCS縮減,設(shè)計(jì)了兩種加載UC-EBG結(jié)構(gòu)的4單元微帶天線陣。仿真結(jié)果顯示,通過控制UC-EBG的結(jié)構(gòu)尺寸,能夠在微帶陣列天線輻射性能基本保持不變的情況下,分別實(shí)現(xiàn)微帶陣列天線帶內(nèi)和帶外RCS的縮減。
[Abstract]:The stealth performance of target plays a very important role in modern electronic warfare. It is an important factor to improve its penetration ability and security. Antenna is a special scattering object. Its high gain means that it will be one of the main sources of carrier scattering, so how to reduce the scattering of antenna system is very important to improve the stealthy performance of the whole platform. In order to ensure the normal operation of the antenna, it is necessary to ensure that the antenna radiation performance is not affected while reducing the antenna scattering, so the conventional stealth measures. For example, the coated absorbing material can not be applied to the antenna. In this paper, the microstrip antenna and array antenna RCS reduction technology is studied, and two effective methods to reduce the RCS of the microstrip antenna and antenna array are proposed. The application of these two methods in RCS reduction of microstrip antenna is studied and the low scattering microstrip antenna and array antenna are designed. The application of these methods can not only effectively reduce the RCSs of microstrip antenna and antenna array, but also maintain the radiation performance of microstrip antenna and antenna array. The main work of this paper can be summarized as follows: 1. The basic structure and principle of rectangular microstrip antenna are studied. According to the theory of cavity mode of microstrip antenna, the effects of slotted technique and loaded short circuit pin technology on the radiation performance and scattering performance of microstrip antenna are studied respectively. The two methods are applied to the microstrip antenna to reduce the RCS of the microstrip antenna by suppressing the high-order mode of the microstrip antenna. The two methods can significantly reduce the RCS outside the microstrip antenna. It does not affect the normal operation of the antenna. 2. The characteristics of coplanar electromagnetic band gap structure (UC-EBG) are studied and analyzed. The RCS of microstrip antenna is reduced by using its band-stop characteristic and in-phase reflection characteristic. A low scattering microstrip antenna is designed by loading UC-EBG structure around the radiation patch of microstrip antenna. The effect of loaded UC-EBG structure on mono-static RCS and bistatic RCS of microstrip antenna is analyzed under different polarization modes of incident plane wave. The backscattering reduction in the low scattering microstrip antenna band is up to 13dBsmand the radiation characteristics of the microstrip antenna remain unchanged, which indicates that this method is an effective design method to reduce the RCS of the microstrip antenna. 3. The results of RCS reduction of microstrip antenna based on UC-EBG structure are applied to in-band and out-of-band RCS reduction, respectively. Two kinds of 4-element microstrip antenna arrays loaded with UC-EBG structure are designed. The simulation results show that the structure size of UC-EBG is controlled by controlling the structure size. When the radiation performance of the microstrip array antenna remains basically unchanged, the in-band and out-of-band RCS of the microstrip array antenna can be reduced respectively.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN822

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相關(guān)期刊論文 前1條

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本文編號(hào)：1420949