本文關(guān)鍵詞： 螺旋天線 圓極化 微帶天線 SIW CTS　出處：《西安電子科技大學(xué)》2014年博士論文　論文類型：學(xué)位論文

【摘要】：隨著信息技術(shù)的不斷發(fā)展，通信業(yè)務(wù)的不斷拓寬，衛(wèi)星通信的應(yīng)用領(lǐng)域越來越廣泛并逐步成為重要的通信手段。因此，為了適應(yīng)現(xiàn)代通信的發(fā)展，圓極化、寬波束、傾斜波束、低副瓣和波束掃描等成為天線技術(shù)發(fā)展的重要研究方向。本論文結(jié)合科研課題，為滿足衛(wèi)星通信系統(tǒng)的需求，對(duì)單臂螺旋天線、四臂螺旋天線、圓極化微帶縫隙天線及CTS陣列天線進(jìn)行了深入的研究。作者的主要研究成果可概括為： 1.對(duì)單臂螺旋天線進(jìn)行了研究。針對(duì)衛(wèi)星通信系統(tǒng)對(duì)天線小型化、傾斜波束的需求，設(shè)計(jì)了兩種分別應(yīng)用于地面固定站和載體衛(wèi)星通信系統(tǒng)的單臂螺旋天線。包括帶有加載板的軸向模單臂螺旋天線陣列，通過加載短路板可在較低高度下獲得較高的增益；采用不對(duì)稱螺旋臂繞制的錐向模單臂螺旋天線，利用螺旋臂的不對(duì)稱電流分布實(shí)現(xiàn)了較好的波束下傾輻射特性。測試結(jié)果表明，上述單臂螺旋天線均具有良好的電性能。 2.對(duì)四臂螺旋天線及饋電網(wǎng)絡(luò)進(jìn)行了研究。針對(duì)衛(wèi)星通信系統(tǒng)對(duì)天線小型化、寬波束的需求，設(shè)計(jì)了三種集成不同饋電網(wǎng)絡(luò)的寬波束四臂螺旋天線。包括采用折疊臂技術(shù)的折疊四臂螺旋天線及小型化饋電網(wǎng)絡(luò)；采用彎臂耦合技術(shù)的耦合四臂螺旋天線及組合饋電網(wǎng)絡(luò)；采用多臂組合技術(shù)的寬帶四臂螺旋天線及寬帶饋電網(wǎng)絡(luò)。測試結(jié)果表明，上述四臂螺旋天線均具有良好的電性能。 3.對(duì)圓極化微帶縫隙天線進(jìn)行了研究。針對(duì)衛(wèi)星通信系統(tǒng)對(duì)寬頻帶圓極化的需求，設(shè)計(jì)了兩種寬縫圓極化天線陣列。包括帶有改進(jìn)饋電網(wǎng)絡(luò)的共面波導(dǎo)饋電的寬縫圓極化天線陣列；帶有新型串聯(lián)饋電網(wǎng)絡(luò)的非對(duì)稱共面波導(dǎo)饋電的寬縫圓極化天線陣列。測試結(jié)果表明，上述圓極化微帶天線均具有良好的電性能。 4.對(duì)基于SIW的低副瓣CTS天線陣列進(jìn)行了研究。針對(duì)衛(wèi)星通信系統(tǒng)對(duì)天線低剖面、低副瓣的需求，設(shè)計(jì)了一種新型的SIW-CTS天線陣列。研究了CTS天線的基本理論、單元間互耦特性和輻射特性，采用差分進(jìn)化算法進(jìn)行了低副瓣優(yōu)化，，設(shè)計(jì)了寬帶饋電網(wǎng)絡(luò)。仿真結(jié)果表明，設(shè)計(jì)的CTS天線陣列具有良好的電性能。 5.對(duì)VICTS陣列天線進(jìn)行了研究。針對(duì)移動(dòng)衛(wèi)星通信系統(tǒng)對(duì)天線跟蹤的需求，對(duì)具有波束掃描特性的VICTS陣列天線進(jìn)行了初步研究。討論了VICTS陣列天線的基本理論及分析方法，設(shè)計(jì)了VICTS天線單元并組陣掃描，對(duì)波束掃描中出現(xiàn)的若干問題進(jìn)行了分析和討論。
[Abstract]:With the development of information technology and the expansion of communication services, the application field of satellite communication is becoming more and more extensive and gradually become an important means of communication. Therefore, in order to adapt to the development of modern communications, circular polarization, wide beam, inclined beam, Low sidelobe and beam scanning have become the important research direction of antenna technology. In order to meet the demand of satellite communication system, the single arm spiral antenna and four arm spiral antenna are studied in this paper. The circularly polarized microstrip slot antenna and CTS array antenna are studied in detail. The main research results of the author can be summarized as follows:. 1. The single-arm helical antenna is studied. Two kinds of single-arm helical antennas used in ground fixed station and carrier satellite communication system are designed, including axial mode single-arm spiral antenna array with loading plate, which can obtain higher gain at lower height by loading short-circuit plate. Using the asymmetric spiral arm winding single arm single arm spiral antenna, the asymmetric current distribution of the spiral arm is used to achieve better beam downdip radiation characteristics. The test results show that all of these single arm spiral antennas have good electrical performance. 2. The four-arm helical antenna and feed network are studied. Three kinds of wide-beam four-arm helical antennas integrated with different feed networks are designed, including folded four-arm helical antennas and miniaturized feed networks, coupled four-arm helical antennas and combined feed networks using bending arm coupling technology. The wideband four-arm helical antenna and broadband feed network using multi-arm combination technique are used. The test results show that these four-arm helical antennas have good electrical performance. 3. The circularly polarized microstrip slot antenna is studied. Two kinds of wide-slit circularly polarized antenna arrays are designed, including a wide-slit circularly polarized antenna array with a coplanar waveguide fed by an improved feed network. A wide-slit circularly polarized antenna array with a novel series feed network fed by asymmetric coplanar waveguide is presented. The experimental results show that the circularly polarized microstrip antennas have good electrical performance. 4. The low sidelobe CTS antenna array based on SIW is studied. A new SIW-CTS antenna array is designed to meet the demand of low profile and low sidelobe antenna in satellite communication system. The basic theory of CTS antenna is studied. Based on the characteristics of mutual coupling and radiation between elements, the differential evolution algorithm is used to optimize the low sidelobe, and the broadband feed network is designed. The simulation results show that the designed CTS antenna array has good electrical performance. 5. The VICTS array antenna is studied. According to the requirement of antenna tracking in mobile satellite communication system, the VICTS array antenna with beam scanning characteristic is studied. The basic theory and analysis method of VICTS array antenna are discussed. The VICTS antenna unit and array scanning are designed, and some problems in beam scanning are analyzed and discussed.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN828.5

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