本文選題：Vivaldi　切入點(diǎn)：寬帶　出處：《哈爾濱工業(yè)大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：為了滿足現(xiàn)代衛(wèi)星、無線通信和雷達(dá)系統(tǒng)的多信道和多功能特性，對(duì)寬帶天線的性能提出了越來越多的指標(biāo)。在這些領(lǐng)域，寬帶相控陣天線的地位非常突出。本文以Vivaldi天線為研究對(duì)象，將其分為兩部分：饋電結(jié)構(gòu)和漸變曲線輻射結(jié)構(gòu)。采用寬帶微帶——槽線轉(zhuǎn)換結(jié)構(gòu)給Vivaldi天線饋電。 由于陣列天線對(duì)單元特性要求更為嚴(yán)格，尤其對(duì)于寬帶天線，為了抑制柵瓣的出現(xiàn)，需要天線單元尺寸足夠小。本文研究了加載矩形縫隙波紋結(jié)構(gòu)的微帶——槽線饋電Vivaldi天線和微帶饋電對(duì)踵Vivaldi天線。通過加載該波紋結(jié)構(gòu)，可以增加表面電流的有效路徑，實(shí)現(xiàn)小型化。最終設(shè)計(jì)了變化率更緩慢的余弦型曲線，該天線寬度僅14mm(最低頻率波長(zhǎng)的0.36倍)，工作帶寬為7.7~18.9GHz；另外設(shè)計(jì)了一款小型化對(duì)踵Vivaldi天線，通過加載橫向和縱向的縫隙波紋改善其方向性和縮小橫向尺寸，橫向波紋可以增加電流的有效路徑，而縱向波紋可以抑制后瓣，起到改變表面電流方向的作用，增加天線的方向性，其帶寬可達(dá)7.7~20.0GHz，，天線寬度僅11mm(最低頻率波長(zhǎng)的0.29倍)。 采用設(shè)計(jì)好的單元組成一維1×5的E面天線陣，其最大掃描角度為22°，而H面天線陣最大掃描角為34°。為了降低副瓣電平，饋電采用Taylor幅度加權(quán)的方式。最后研究了二維天線陣，通過控制相位，可以在X波段實(shí)現(xiàn)二維掃描。 本文為超寬帶天線小型化和天線陣二維掃描方面的探索和研究提供新的思路，有一定深入研究的價(jià)值。
[Abstract]:In order to meet the multichannel and multifunctional characteristics of modern satellite, wireless communication and radar systems, more and more indicators are proposed for the performance of wideband antennas. The position of wideband phased array antenna is very prominent. This paper takes Vivaldi antenna as research object, divides it into two parts: feed structure and gradual curve radiation structure, and feed Vivaldi antenna with wideband microstrip slotted line conversion structure. Because the array antenna is more strict to the element characteristic, especially for the wideband antenna, in order to restrain the appearance of the grid lobe, The size of the antenna element is small enough. In this paper, the microstrip Vivaldi antenna fed by the rectangular slot ripple and the microstrip feed pair Vivaldi antenna are studied. By loading the corrugated structure, the effective path of the surface current can be increased. Miniaturization. Finally, a more slowly changing cosine curve is designed, the antenna width is only 14mm (0.36 times of the lowest frequency wavelength, the operating bandwidth is 7.7m 18.9 GHz), and a miniaturized Vivaldi antenna is designed. By loading transverse and longitudinal crevice ripples to improve their directionality and reduce their transverse dimensions, transverse ripples can increase the effective path of current, while longitudinal ripples can suppress the back lobe and play the role of changing the direction of surface current. By increasing the directivity of the antenna, the bandwidth of the antenna is up to 7.7V 20.0GHz, and the antenna width is only 11mm (0.29 times of the lowest frequency wavelength). In order to reduce the sidelobe level, one dimensional E plane antenna array with 1 脳 5 plane and H plane antenna array has a maximum scanning angle of 22 擄and a maximum scanning angle of 34 擄. In order to reduce the sidelobe level, the Taylor amplitude weighting method is used to feed the antenna. Finally, the two-dimensional antenna array is studied. By controlling the phase, two-dimensional scanning can be realized in X-band. This paper provides new ideas for the miniaturization of ultra-wideband antenna and two-dimensional scanning of antenna array.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN822.8

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 鐘順時(shí);梁仙靈;延曉榮;;超寬帶平面天線技術(shù)[J];電波科學(xué)學(xué)報(bào);2007年02期

本文編號(hào)：1581970