發(fā)布時(shí)間：2019-02-12 11:53

【摘要】：近年來,科技的進(jìn)步和通信技術(shù)的發(fā)展對(duì)無線通信設(shè)備提出了更高的要求。天線作為通信系統(tǒng)的主要組成部分,得到了廣泛的關(guān)注。為了滿足移動(dòng)通信設(shè)備便攜式需求,天線逐漸向小型化、寬頻帶、多頻帶的方向發(fā)展,平面印刷板天線由于其具有成本低、制作簡單、重量輕、設(shè)計(jì)靈活等優(yōu)勢(shì),非常適合在現(xiàn)代通信設(shè)備中使用。本文首先設(shè)計(jì)了一款超寬帶三阻帶天線。利用邊緣漸變的輻射面和地板實(shí)現(xiàn)了超寬帶天線3.1-10.6 GHz的工作頻段。通過輻射面上的半圓形半波長開槽在3.3-3.6 GHz(WIMAX)形成阻帶,在饋電線兩側(cè)分別引入半波長半圓諧振結(jié)構(gòu),在5.15-5.35 GHz和5.72-5.83 GHz(WLAN)實(shí)現(xiàn)阻帶功能。天線在工作頻段內(nèi),具有全向的H面方向圖,增益起伏約2 dB,傳輸函數(shù)比較平坦,群時(shí)延不大于1 ns,探針距天線600 mm時(shí)探測(cè)到的H面的保真系數(shù)大于0.88,具有很好的時(shí)域特性。天線經(jīng)過加工測(cè)試,測(cè)試與仿真結(jié)果吻合較好。創(chuàng)新設(shè)計(jì)了兩款三通帶天線。第一款多通帶天線尺寸為20×25.5×0.8 mm3,利用不同短枝節(jié)產(chǎn)生不同的電流路徑,實(shí)現(xiàn)了300 MHz(2.2-2.5 GHz)、400 MHz(3.3-3.7 GHz)以及800 MHz(5.1-5.9 GHz)三個(gè)通帶,天線的每個(gè)通帶都可以通過調(diào)整枝節(jié)的尺寸獨(dú)立控制,具有較強(qiáng)的實(shí)用價(jià)值。另一款多通帶天線采用了共面波導(dǎo)饋電,在天線正面引入倒U形槽,背面引入方形裂口環(huán),這兩個(gè)結(jié)構(gòu)同時(shí)起到了產(chǎn)生阻帶和調(diào)頻的作用。實(shí)現(xiàn)了220 MHz(2.33-2.55 GHz)、880 MHz(3.0-3.88GHz)和750 MHz(5.15-5.9 GHz)三個(gè)通帶。兩款通帶天線都覆蓋了2.4 2.484 GHz和5.15 5.825 GHz(WLAN)和3.3-3.6 GHz(WIMAX)兩個(gè)系統(tǒng)。利用CST及HFSS仿真軟件對(duì)兩款多通帶天線進(jìn)行優(yōu)化,并將天線進(jìn)行加工測(cè)試,測(cè)試與仿真結(jié)果相符。
[Abstract]:In recent years, the progress of science and technology and the development of communication technology put forward higher requirements for wireless communication equipment. As the main part of communication system, antenna has been paid more and more attention. In order to meet the portable demand of mobile communication equipment, the antenna is gradually developing towards the direction of miniaturization, broadband and multi-band. Because of its advantages of low cost, simple fabrication, light weight, flexible design, and so on, the planar printed board antenna has the advantages of low cost, simple fabrication, light weight, flexible design, etc. Very suitable for use in modern communication equipment. In this paper, we first design a three-stop-band UWB antenna. The operating frequency band of UWB antenna 3.1-10.6 GHz is realized by using edge gradient radiation surface and floor. Through the semicircular half-wavelength grooving on the radiation surface, the stopband is formed at 3.3-3.6 GHz (WIMAX), and the half-wavelength semicircular resonant structure is introduced on both sides of the feed line, respectively. The stopband function is realized at 5.15-5.35 GHz and 5.72-5.83 GHz (WLAN). In the operating frequency band, the antenna has a omnidirectional H-plane pattern, and the gain fluctuation of about 2 dB, transmission function is relatively flat. The fidelity coefficient of the H plane detected when the group delay is not more than 1 ns, probe is more than 0.88 when the probe is less than 600 mm from the antenna. It has good time domain characteristics. The antenna has been processed and tested, and the test results are in good agreement with the simulation results. Innovative design of two three-way antenna. The size of the first multiband antenna is 20 脳 25.5 脳 0. 8 mm3, which uses different short branches to produce different current paths, and achieves 300 MHz (2.2-2.5 GHz),). Four hundred MHz (3.3-3.7 GHz) and eight hundred MHz (5.1-5.9 GHz) passbands, each of which can be independently controlled by adjusting the size of the branches, is of great practical value. The other multi-band antenna is fed by coplanar waveguide. The inverted U-shaped slot is introduced in the front of the antenna and the square crack ring is introduced on the back. These two structures play a role of both stopband and frequency modulation. Three passbands of 220 MHz (2.33-2.55 GHz), 880 MHz (3.0-3.88GHz) and 750 MHz (5.15-5.9 GHz) are realized. Both passband antennas cover 2. 4 GHz, 5. 15 5.825 GHz (WLAN) and 3. 3. 6 GHz (WIMAX) systems. CST and HFSS simulation software are used to optimize the two multi-pass antennas, and the antenna processing tests are carried out, and the results are in agreement with the simulation results.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN820

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