【摘要】：隨著現(xiàn)代無線通信系統(tǒng)的發(fā)展,為了適應(yīng)逐漸增長(zhǎng)的語(yǔ)音、數(shù)據(jù)及互聯(lián)網(wǎng)業(yè)務(wù)的需求,對(duì)無線通信系統(tǒng)在傳輸率等性能上的有了更高的要求�？芍貥�(gòu)天線的提出很好的解決了這一難題,它可以加載微波開關(guān),通過控制微波開關(guān)的通斷狀態(tài)來改變天線表面電流的分布或者天線的長(zhǎng)度等參數(shù),從而實(shí)現(xiàn)天線的頻率、極化和方向圖的可重構(gòu)特性。我們需要在一款天線上實(shí)現(xiàn)多種不同的功能,所以我們首先研究方向圖可重構(gòu)天線,進(jìn)而再研究頻率和方向圖可重構(gòu)天線。本文的主要工作內(nèi)容如下:1.本文首先介紹了天線的基礎(chǔ)知識(shí)以及微帶天線的工作原理,探討了可重構(gòu)天線實(shí)現(xiàn)方法以及現(xiàn)如今為了實(shí)現(xiàn)混合可重構(gòu)技術(shù)所遇到的問題。2.基于可重構(gòu)天線的相關(guān)理論,設(shè)計(jì)了一款具有兩種工作模式的應(yīng)用于5.2GHz頻段的對(duì)稱型方向圖可重構(gòu)天線。在天線結(jié)構(gòu)上采用了開槽技術(shù),槽內(nèi)加載微波開關(guān)。天線的中心工作頻率為5.2GHz,回波損耗值達(dá)到了-43.6dB,阻抗帶寬為2.3GHz,其相對(duì)帶寬為47%,天線在兩種模式下的最大增益為4.14dBi和4.06dBi,具有良好的增益特性。經(jīng)實(shí)物加工后測(cè)得的結(jié)果與仿真結(jié)果基本吻合。說明本文所設(shè)計(jì)的天線達(dá)到了比較好的性能,天線滿足對(duì)帶寬的指標(biāo)要求。3.設(shè)計(jì)了一款頻率與方向圖可重構(gòu)天線,該天線為對(duì)稱型結(jié)構(gòu),5個(gè)開關(guān)的“通斷”狀態(tài)決定天線的性能,采用微帶線饋電方式。天線可以工作在9種模式下,中心頻率分別為 2.0GHz、4.9GHz、5.1 GHz、8.6GHz、9.9GHz 和 10.1GHz,實(shí)現(xiàn)了天線的頻率與方向圖可重構(gòu)特性。
[Abstract]:With the development of modern wireless communication system, in order to adapt to the increasing demand of voice, data and Internet services, the performance of wireless communication system in transmission rate has higher requirements. The proposed reconfigurable antenna solves this problem well. It can load the microwave switch, change the current distribution on the antenna surface or the length of the antenna by controlling the on-off state of the microwave switch, so as to realize the frequency of the antenna. Reconfigurable properties of polarization and pattern. We need to achieve many different functions on one antenna, so we first study the pattern reconfigurable antenna, and then we study the frequency and pattern reconfigurable antenna. The main work of this paper is as follows: 1. In this paper, the basic knowledge of antenna and the working principle of microstrip antenna are introduced, and the realization method of reconfigurable antenna and the problems encountered in the realization of hybrid reconfigurable technique are discussed. Based on the theory of reconfigurable antenna, a symmetrical pattern reconfigurable antenna with two working modes is designed for 5.2GHz frequency band. The slot technique is used in the antenna structure, and the microwave switch is loaded in the slot. The central operating frequency of the antenna is 5.2 GHz, the return loss is -43.6 dB, the impedance bandwidth is 2.3 GHz, and the relative bandwidth is 47. The maximum gain of the antenna in both modes is 4.14dBi and 4.06 dBi. the antenna has good gain characteristics. The measured results are in good agreement with the simulation results. It shows that the antenna designed in this paper achieves better performance, and the antenna meets the requirements of bandwidth. 3. A frequency and pattern reconfigurable antenna is designed. The antenna is symmetrical. The "on-off" state of five switches determines the performance of the antenna. The antenna is fed by microstrip line. The antenna can operate in nine modes with central frequencies of 2.0GHz 4.9GHz 5.1 GHz,8.6GHz,9.9GHz and 10.1GHz respectively. The reconfigurable characteristics of the antenna frequency and pattern are realized.
【學(xué)位授予單位】：山東科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN820

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本文編號(hào)：2296873