發(fā)布時(shí)間：2018-04-19 00:00

  本文選題：超寬帶天線 + 圓弧狀H形槽��； 參考：《中南大學(xué)》2014年碩士論文

【摘要】：超寬帶頻段(UWB)由美國聯(lián)邦通信委員會(huì)(FCC)于2002年批準(zhǔn)由軍用進(jìn)入民用,工作范圍為3.1-10.6GHz。天線是無線通信系統(tǒng)中的重要組成部分,其性能的很大程度上決定了整個(gè)系統(tǒng)性能的好壞,所以在超寬帶系統(tǒng)中,超寬帶天線的研究具有重大的意義。在擁有眾多窄帶信號(hào)系統(tǒng)的超寬帶頻段內(nèi),防止這些系統(tǒng)的信號(hào)干擾是超寬帶天線的重要研究課題,通過設(shè)計(jì)具有頻帶阻斷效應(yīng)的陷波超寬帶天線是解決信號(hào)干擾問題最便捷有效的方法。 本文首先對(duì)超寬帶天線及具有陷波功能的超寬帶天線的國內(nèi)外發(fā)展?fàn)顩r進(jìn)行了介紹,然后對(duì)影響超寬帶天線性能的重要參數(shù)進(jìn)行了分析,同時(shí)介紹了陷波功能的一般實(shí)現(xiàn)方法。接下來對(duì)一種小型平面超寬帶天線進(jìn)行了優(yōu)化和改造,在該天線的基礎(chǔ)上設(shè)計(jì)了一種帶圓弧狀H形槽的雙陷波超寬帶天線,能有效防止3.3-3.6GHz的Wimax信號(hào)和5.1-5.9GHz的WLAN信號(hào)。最后進(jìn)行了三陷波天線的設(shè)計(jì),在雙陷波的基礎(chǔ)上,加入了對(duì)7.25-7.75GHz的X頻帶衛(wèi)星下行信號(hào)的屏蔽。在進(jìn)行可控性設(shè)計(jì)時(shí),實(shí)現(xiàn)了雙陷波和三陷波的可調(diào)節(jié)功能,提高了天線的陷波工作性能。 在對(duì)所設(shè)計(jì)的雙陷波天線的仿真分析中發(fā)現(xiàn)產(chǎn)生陷波功能的圓弧狀H形槽相對(duì)傳統(tǒng)的H形槽和線形槽,能夠通過參數(shù)組合的方式更有效地調(diào)節(jié)陷波的中心頻率,這使天線在制造和進(jìn)行其他的改進(jìn)設(shè)計(jì)時(shí)有了更方便的選擇。對(duì)三陷波超寬帶天線進(jìn)行可控性設(shè)計(jì)中,將開關(guān)設(shè)計(jì)為與陷波結(jié)構(gòu)相同的環(huán)形結(jié)構(gòu)。這樣的設(shè)計(jì)使得天線在實(shí)現(xiàn)三陷波向雙陷波轉(zhuǎn)換的過程中,同時(shí)改進(jìn)了雙陷波天線的陷波性能。實(shí)驗(yàn)結(jié)果證明,所設(shè)計(jì)的陷波超寬帶天線不僅有良好的頻帶阻斷效果,還擁有良好的全向輻射性和穩(wěn)定的增益。
[Abstract]:UWB (UWB) was approved by the Federal Communications Commission (FCC) for civilian use in 2002, with a range of 3.1-10.6 GHz.Antenna is an important part of wireless communication system, and its performance determines the performance of the whole system to a great extent, so the research of UWB antenna is of great significance in UWB system.In the ultra-wideband (UWB) band with many narrowband signal systems, the prevention of signal interference from these systems is an important research topic of UWB antenna.The design of notch UWB antenna with band blocking effect is the most convenient and effective method to solve the problem of signal interference.This paper first introduces the development of UWB antenna and the UWB antenna with notch function at home and abroad, then analyzes the important parameters that affect the performance of UWB antenna, and introduces the general realization method of notch function.Then, a small planar ultra-wideband antenna is optimized and modified. Based on this antenna, a double-notch ultra-wideband antenna with circular H-groove is designed, which can effectively prevent the Wimax signal of 3.3-3.6GHz and the WLAN signal of 5.1-5.9GHz.Finally, the design of three-notch antenna is carried out. On the basis of double notch, the 7.25-7.75GHz X-band satellite downlink signal is shielded.In the controllability design, the tunable functions of double notch and three notch are realized, and the performance of antenna notch is improved.In the simulation analysis of the designed double-notch antenna, it is found that the circular arc H-groove, which produces notch function, can adjust the center frequency of notch more effectively than the traditional H-groove and linear slot.This gives the antenna a more convenient choice when it comes to manufacturing and other improved designs.In the controllability design of three-notch UWB antenna, the switch is designed as a ring structure with the same notch structure.This design makes the antenna transform from three notch to two notch, and improves the notch performance of double notch antenna at the same time.Experimental results show that the designed notch UWB antenna not only has good bandwidth blocking effect, but also has good omnidirectional radiation and stable gain.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN822.8

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