【摘要】：由于微帶天線具有質(zhì)量輕、低剖面、體積小、易于制造等優(yōu)點,現(xiàn)如今已經(jīng)廣泛地應用于各種無線通信技術(shù)中。同時,近年來,由于天線使用平臺的特殊要求,傳統(tǒng)的單一的線極化天線已經(jīng)不能滿足實際的要求,圓極化天線越來越受到人們的重視。因此,微帶圓極化天線已經(jīng)成為當前研究的重要課題。當前圓極化微帶天線的研究課題有高增益圓極化天線、寬頻帶圓極化微帶天線等,基于上述研究背景和理論,本文主要設計幾種小型化的微帶圓極化天線,主要內(nèi)容如下:1.設計了一個低剖面UHF頻段的共形圓極化天線,采用漸變十字交叉槽來實現(xiàn)圓極化輻射,用一分四功分器進行饋電,天線尺寸為300mm×300mm×30 mm。仿真結(jié)果良好,天線在波束覆蓋范圍內(nèi)-60~60oo的增益?1-dBi,同時,在波束覆蓋范圍內(nèi)-60~60oo軸比AR?6dB,右旋圓極化性能良好。2.設計了一個UHF頻段小型化右旋圓極化微帶天線,天線的尺寸為324mm×324mm×324 mm,該天線采用了正交雙H槽縫隙耦合饋電,仿真優(yōu)化后的天線性能良好,在工作頻點處的最大增益大于6.5dB,電壓駐波比VSWR小于1.5,交叉極化性能良好。3.設計了一個S頻段雙H槽耦合饋電的左旋圓極化天線陣列,采用一分八的功分器進行饋電,得到的仿真結(jié)果良好,天線在工作頻點處的最大增益在12dB以上,軸比AR?1dB,左旋圓極化性能良好,滿足設計指標要求。4.把前面設計的兩個雙H槽耦合饋電的UHF頻段和S頻段的天線結(jié)構(gòu)組合在一起,用UHF頻段天線最上層的輻射貼片來當成S頻段的地板,同時又當做UHF頻段的輻射貼片,這樣就構(gòu)成了一個復合天線。對天線模型進行調(diào)整分析,最后得到的復合天線在UHF頻段和S頻段的性能良好。最后對全文工作進行了總結(jié),提出了有待于進一步研究和改進的問題。
[Abstract]:Microstrip antennas have been widely used in various wireless communication technologies due to their advantages of light weight, low profile, small volume, easy to manufacture and so on. At the same time, in recent years, due to the special requirements of the antenna platform, the traditional single line polarization antenna can not meet the actual requirements, circular polarization antenna has been paid more and more attention. Therefore, microstrip circular polarization antenna has become an important research topic. The current research topics of circular polarized microstrip antenna include high gain circular polarization antenna, wide band circular polarized microstrip antenna and so on. Based on the above research background and theory, several miniaturized microstrip circularly polarized antennas are designed in this paper. The main contents are as follows: 1. A conformal circular polarization antenna with low profile UHF band is designed. The cross slot is used to realize circular polarization radiation. The antenna is fed with a four power divider. The size of the antenna is 300mm 脳 300mm 脳 30 mm.. The simulation results show that the gain of 60~60oo in the range of beam coverage is 1-dBi. at the same time, the performance of 60~60oo axis is better than that of AR?6dB, in the range of beam coverage. 2. A miniaturized dextral circularly polarized microstrip antenna in UHF band is designed. The size of the antenna is 324mm 脳 324mm 脳 324 mm,. The antenna is fed by orthogonal double H slot coupling. The simulation results show that the antenna has good performance. The maximum gain at operating frequency is greater than 6.5 dB, the VSWR is less than 1.5, and the cross-polarization performance is good. A S-band double-H-slot coupled left-handed circularly polarized antenna array is designed, which is fed by a one-to-eight power divider. The simulation results show that the maximum gain of the antenna at the operating frequency is above 12dB and the axial ratio is AR?1dB,. The left circle polarization performance is good and meets the design requirements. 4. 4. Combining the UHF band and the S band antenna structure of the two double H slot coupling feeders designed in front, the radiation patch of the upper layer of the UHF band antenna is used as the floor of the S band, and at the same time it is used as the radiation patch in the UHF band. This constitutes a composite antenna. The antenna model is adjusted and analyzed, and the performance of the composite antenna in UHF and S band is good. Finally, the paper summarizes the work and puts forward some problems to be further studied and improved.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN821.1

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1 焦永昌;潘雪明;王澤美;張福順;;一種開雙H形槽的新型寬頻微帶天線[J];電波科學學報;2005年05期

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本文編號：2342138