本文選題：寬帶天線　切入點：復(fù)合左/右手傳輸線　出處：《天津大學(xué)》2015年博士論文　論文類型：學(xué)位論文

【摘要】：隨著手持通信設(shè)備及超寬帶無線通信技術(shù)的飛速發(fā)展,電子設(shè)備的功能越來越強大,信號帶寬也在不斷提高。人們對無線通信系統(tǒng)中天線的性能提出了更高的要求,主要體現(xiàn)在頻帶的范圍更寬、體積更小、便于安裝和攜帶,同時具有較高的輻射效率等等。因此,對寬帶天線理論與技術(shù)開展深入的研究顯得尤為重要。本論文對異向介質(zhì)寬帶天線、寬帶可穿戴天線及超寬帶印刷天線理論與技術(shù)進行了深入研究。分析了異向介質(zhì)帶寬增強技術(shù)機理,探討了新型異向介質(zhì)寬帶天線的設(shè)計方法;總結(jié)了共面波導(dǎo)結(jié)構(gòu)特點,提出了基于共面波導(dǎo)饋電的可穿戴天線的設(shè)計方案;研究了超寬帶平面單極子天線設(shè)計原理,進行了超寬帶印刷單極子天線的設(shè)計�，F(xiàn)將論文的主要工作及創(chuàng)新點總結(jié)如下:1.研究了異向介質(zhì)帶寬增強原理,將復(fù)合左/右手傳輸線和互補分裂諧振環(huán)兩種異向介質(zhì)結(jié)構(gòu)集成至天線饋電網(wǎng)絡(luò)中,并進行建模及優(yōu)化。設(shè)計了兩款新型異向介質(zhì)寬帶天線,并對其中一款天線進行了加工測試。改變了將異向介質(zhì)集成至天線輻射單元或引入異向介質(zhì)設(shè)計天線罩的常規(guī)設(shè)計方法。通過改變饋電電路,在不增加天線尺寸的前提下,實現(xiàn)了降低諧振頻率、增加天線帶寬的目的。2.提出了使用日常衣物的紡織材料作為可穿戴天線介質(zhì)基底的設(shè)計方法,設(shè)計并測試了三款新型寬帶可穿戴天線。實現(xiàn)了可穿戴天線與日常衣物的融合,大大提高了可穿戴天線的適應(yīng)性、靈活性和隱蔽性,為將搶險服、消防服等紡織材料作為基底設(shè)計專用型可穿戴天線奠定了基礎(chǔ)。3.將共面波導(dǎo)饋電方式引入牛仔布為介質(zhì)基底的可穿戴天線設(shè)計中,利用共面波導(dǎo)饋電天線接地板與輻射貼片位于介質(zhì)基底同側(cè)的優(yōu)勢,以及牛仔布的介質(zhì)基底結(jié)構(gòu),實現(xiàn)了直接將天線附于日常衣物表面的目的,簡化了可穿戴天線的加工過程,降低了可穿戴天線的集成難度。4.研究了超寬帶天線中不同接地板和輻射貼片結(jié)構(gòu)對天線時域及頻域特性的影響,通過建模優(yōu)化,設(shè)計了一款新型超寬帶平面單極子天線并進行了加工測試。通過改進輻射貼片結(jié)構(gòu),在不改變天線大小的前提下,加大了輻射邊界,降低了諧振頻率。通過在傳統(tǒng)接地板上加入兩個對稱三角形金屬結(jié)構(gòu),改善了天線的阻抗匹配程度,擴展了天線帶寬,實現(xiàn)了超寬帶設(shè)計。
[Abstract]:With the rapid development of hand-held communication equipment and ultra-wideband wireless communication technology, the functions of electronic devices are becoming more and more powerful, and the signal bandwidth is also increasing. Mainly reflected in the wider range of the band, smaller volume, easy to install and carry, at the same time has a higher radiation efficiency and so on. It is very important to study the theory and technology of broadband antenna. The theory and technology of wideband wearable antenna and ultra-wideband printed antenna are studied in detail. The mechanism of bandwidth enhancement is analyzed, the design method of new broadband antenna is discussed, and the structural characteristics of coplanar waveguide are summarized. A design scheme of wearable antenna based on coplanar waveguide feed is proposed, and the design principle of UWB planar monopole antenna is studied. The design of UWB printed monopole antenna is carried out. The main work and innovation of this paper are summarized as follows: 1. The compound left-hand transmission line and complementary split resonant ring are integrated into the antenna feed network, and two novel heterodyne broadband antennas are designed. One of the antennas has been processed and tested. The conventional design method of integrating the diameters into the antenna radiation unit or introducing the different dielectric to design the radome is changed. By changing the feed circuit, the antenna size is not increased. The aim of reducing the resonant frequency and increasing the antenna bandwidth is realized. 2. The design method of using the textile material of daily clothing as the substrate of wearable antenna medium is proposed. Three new types of wideband wearable antennas are designed and tested. The fusion of wearable antennas and daily clothing is realized, which greatly improves the adaptability, flexibility and concealment of wearable antennas. Textile materials, such as fire fighting clothing, have laid a foundation for the design of wearable antennas for special purpose. 3. The coplanar waveguide feed is introduced into the design of wearable antennas with denim as the dielectric substrate. By using the advantages of the coplanar waveguide fed antenna connecting the floor and the radiation patch on the same side of the dielectric substrate and the dielectric substrate structure of the denim, the purpose of directly attaching the antenna to the surface of daily clothing is realized, and the processing process of the wearable antenna is simplified. The integration difficulty of wearable antenna is reduced. 4. The effects of different floor connections and radiation patch structures on the characteristics of the antenna in time domain and frequency domain are studied and optimized by modeling. A new UWB planar monopole antenna is designed and tested. By improving the radiation patch structure, the radiation boundary is increased without changing the antenna size. By adding two symmetrical triangular metal structures to the conventional floor, the impedance matching degree of the antenna is improved, the bandwidth of the antenna is expanded, and the design of UWB is realized.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2015
【分類號】：TN822.8
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本文編號：1625594