本文關(guān)鍵詞：稀布平面陣列天線的優(yōu)化設(shè)計(jì)研究　出處：《電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 稀布陣列天線 降維方法 矩陣束方法 多波束方向圖

【摘要】：稀布陣列天線可利用更少的天線單元對(duì)相同孔徑下的均勻陣列天線性能進(jìn)行逼近,從而降低成本;在天線數(shù)目相同的條件下,具有更窄的主波束寬度,增強(qiáng)系統(tǒng)性能;同時(shí)陣元間距的增大使得陣元間的互耦效應(yīng)減弱;另外,稀布天線陣列的設(shè)計(jì)可以使得饋電網(wǎng)絡(luò)得到簡(jiǎn)化,降低系統(tǒng)復(fù)雜度。以上各優(yōu)點(diǎn)使得稀布陣列天線頗具實(shí)用性,特別是天線增益要求不高,同時(shí)又需要窄的波束寬度的工程應(yīng)用中得到越來(lái)越多的應(yīng)用。陣元數(shù)目的減少會(huì)使得旁瓣電平提高,為了解決高旁瓣電平的問(wèn)題,因此需要對(duì)稀布陣列天線的陣元位置和激勵(lì)進(jìn)行優(yōu)化。本文研究的是給定陣列形狀前提下,對(duì)陣元數(shù)目、陣元位置、電流激勵(lì)的幅度和相位進(jìn)行優(yōu)化設(shè)計(jì),獲得盡量低峰值旁瓣電平和期望輻射方向圖的稀布陣列天線。文中針對(duì)陣列孔徑、陣元數(shù)目和間距多約束條件下研究了一種降維優(yōu)化方法;運(yùn)用矩陣束方法對(duì)稀布平面陣列天線進(jìn)行優(yōu)化設(shè)計(jì)。主要內(nèi)容和創(chuàng)新之處為:1.介紹了陣列天線的基本概念,推導(dǎo)了陣列天線的方向圖函數(shù)計(jì)算公式,并給出了用于稀布平面陣列天線的優(yōu)化設(shè)計(jì)模型。2.研究了基于遺傳算法的降維處理優(yōu)化方法,并對(duì)同心9圓環(huán)稀布陣列進(jìn)行優(yōu)化設(shè)計(jì)。該方法改進(jìn)了圓陣綜合中陣元分布優(yōu)化的不足,實(shí)現(xiàn)了圓環(huán)上的陣元數(shù)目和位置的同時(shí)優(yōu)化,并降低了平面陣列優(yōu)化方法的復(fù)雜性。3.將矩陣束方法運(yùn)用于稀布線陣和稀布平面陣的優(yōu)化設(shè)計(jì)中,通過(guò)低秩矩陣估計(jì)新的陣元數(shù),重構(gòu)陣元位置和激勵(lì),在一定的誤差范圍內(nèi)逼近期望方向圖。該方法是一種非迭代的方式保證全局最優(yōu),并使得計(jì)算效率顯著提高。4.基于矩陣束方法研究了擴(kuò)展矩陣束方法以及擴(kuò)展前后向矩陣束方法,并對(duì)多波束方向圖的稀布直線陣列和稀布可分離平面陣列進(jìn)行優(yōu)化,仿真結(jié)果證明這兩種方法實(shí)現(xiàn)了多方向圖的非均勻陣列天線優(yōu)化。
[Abstract]:The sparse array antenna can use fewer antenna elements to approximate the performance of uniform array antenna with the same aperture, thus reducing the cost. Under the condition of the same number of antennas, the main beam width is narrower and the system performance is enhanced. At the same time, the mutual coupling effect between the elements is weakened with the increase of the distance between the elements. In addition, the design of thin-distributed antenna array can simplify the feed network and reduce the complexity of the system. These advantages make the thin-distributed array antenna more practical, especially the antenna gain requirements are not high. At the same time, there are more and more applications in engineering applications which need narrow beamwidth. The reduction of the number of array elements will increase the sidelobe level, in order to solve the problem of high sidelobe level. Therefore, it is necessary to optimize the array element position and excitation of the thin-distributed array antenna. In this paper, the optimal design of the number of elements, the position of the array elements, the amplitude and phase of the current excitation is studied under the premise of the shape of the array. The sparse array antenna with the lowest peak sidelobe level and desired radiation pattern is obtained. In this paper, a dimension reduction optimization method is studied for the aperture, the number and the spacing of the array. The optimal design of thinly distributed planar array antenna is carried out by using matrix beam method. The main content and innovation are: 1. The basic concept of array antenna is introduced, and the formula for calculating the pattern function of array antenna is derived. The optimal design model of thin-distributed planar array antenna is given. 2. The dimension reduction optimization method based on genetic algorithm is studied. The optimization design of the concentric 9 ring sparse array is carried out. This method improves the deficiency of the array element distribution optimization in the circular array synthesis, and realizes the optimization of the number and position of the array elements on the ring at the same time. The complexity of planar array optimization method is reduced. 3. The matrix beam method is applied to the optimal design of sparse linear array and thinly distributed plane array. The new element number is estimated by low rank matrix and the position and excitation of array element is reconstructed. This method is a non-iterative method to ensure the global optimization. Based on the matrix beam method, the extended matrix beam method and the extended forward and backward matrix beam method are studied. The sparse linear array and thinly separable plane array of multi-beam pattern are optimized. The simulation results show that these two methods achieve the optimization of non-uniform array antenna of multi-beam pattern.
【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)】：TN820.15

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相關(guān)期刊論文 前10條

1 齊建文;陳治平;薛向鋒;;一種平面陣列天線的應(yīng)用和展望[J];軍事通信技術(shù);2000年03期

2 譚貴紅;機(jī)動(dòng)型雷達(dá)平面陣列天線的結(jié)構(gòu)設(shè)計(jì)[J];現(xiàn)代電子;2001年03期

3 牛運(yùn)豐,邢\，

本文編號(hào)：1391673