【摘要】：隨著無線通信技術(shù)的高速發(fā)展,傳統(tǒng)天線如微帶天線等,因為存在高頻金屬歐姆損耗比較高、低頻天線物理尺寸比較大的缺點,所以目前已經(jīng)無法滿足工程應(yīng)用中對天線的小尺寸、寬頻帶、低損耗的實際迫切需求。為了解決傳統(tǒng)天線所面臨的技術(shù)瓶頸,滿足日益增長的天線性能要求,本文研究了一種新型的天線——介質(zhì)諧振器天線。目前,介質(zhì)諧振器天線要面對復(fù)雜電磁情況、高帶寬通信需求,遠(yuǎn)距離傳輸衰弱等實際需求,所以介質(zhì)諧振器天線主要朝著圓極化、寬頻帶、高增益三個方向發(fā)展,本文對介質(zhì)諧振器天線從這三個方面的分別進(jìn)行了分析、研究和設(shè)計。本文主要工作如下:1、對介質(zhì)諧振器天線的相關(guān)理論進(jìn)行了分析,如介質(zhì)諧振器天線和圓極化介質(zhì)諧振器天線的原理、經(jīng)典饋電方式——孔徑耦合饋電的原理、介質(zhì)塊諧振頻率和饋電微帶線參數(shù)估算方法、陶瓷材料加工方法。2、研究并加工了一種特殊饋電結(jié)構(gòu)的耦合槽耦合的圓極化矩形介質(zhì)諧振器天線,測試的結(jié)果表明,-10dB阻抗帶寬為48MHz,頻帶為2.554GHz~2.623GHz,中心頻率為2.582GHz。3dB軸比帶寬為25MHz,頻帶為2.574GHz~2.599GHz,中心頻率2.586GHz,增益為4.3dBi。3、研究了一種改進(jìn)型孔徑耦合饋電的寬帶高增益介質(zhì)諧振器天線,仿真的結(jié)果表明,帶寬覆蓋3.6575GHz~4.9455GHz,帶寬為1459MHz,相對帶寬為34.2%,最高增益達(dá)到了10.2dBi。4、研究了一種加貼小型寄生金屬條的高增益立方體介質(zhì)諧振器天線,仿真的結(jié)果表明,-10dB的阻抗帶寬為534MHz,頻帶為2.058GHz~2.592GHz,相對帶寬為21.8%,增益為7.3dBi。本文所完成的圓極化矩形介質(zhì)諧振器天線、寬帶高增益介質(zhì)諧振器天線、高增益立方體介質(zhì)諧振器天線,經(jīng)過仿真或測試,均達(dá)到了很好的性能和指標(biāo)。
[Abstract]:With the rapid development of wireless communication technology, traditional antennas, such as microstrip antennas, have the disadvantages of high frequency metal ohmic loss and large physical size of low frequency antennas. So it can not meet the urgent need of small size, wide band and low loss in engineering applications. In order to solve the technical bottleneck of traditional antenna and meet the increasing performance requirements of antenna, a new type of antenna, dielectric resonator antenna, is studied in this paper. At present, dielectric resonator antennas have to face complex electromagnetic conditions, high bandwidth communication requirements, long distance transmission weakness and other practical needs. Therefore, dielectric resonator antennas are mainly developed in three directions: circular polarization, wide band, and high gain. In this paper, the three aspects of dielectric resonator antenna are analyzed, studied and designed. The main work of this paper is as follows: 1. The related theories of dielectric resonator antenna are analyzed, such as the principle of dielectric resonator antenna and circularly polarized dielectric resonator antenna, the principle of classical feed mode-aperture coupling feed, Methods for estimating resonant frequency of dielectric blocks and parameters of feed microstrip lines, machining methods for ceramic materials. 2. A circularly polarized rectangular dielectric resonator antenna coupled with coupling grooves with special feed structure is studied and fabricated. The test results show that the impedance bandwidth of-10dB is 48MHz, the bandwidth is 2.554GHz, the frequency band is 2.623GHz, the central frequency is 25MHz, the center frequency is 2.574GHz, the central frequency is 2.586GHz, and the gain is 4.3dBi.3.A broadband high gain dielectric resonator antenna with an improved aperture coupling feed is studied. The simulation results show that the bandwidth covers 3.6575GHz, the bandwidth is 1459MHz, the relative bandwidth is 34.2and the maximum gain is 10.2dBi.4.A high-gain cubic dielectric resonator antenna with small parasitic metal strips is studied. The simulation results show that the impedance bandwidth of-10dB is 534 MHz, the bandwidth is 2.058 GHz, the relative bandwidth is 21.8, and the gain is 7.3 dBi. The circularly polarized rectangular dielectric resonator antenna wideband high gain dielectric resonator antenna and high gain cube dielectric resonator antenna are simulated and tested.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN823

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本文編號：2280312