本文選題：超寬帶(UWB) + 帶通濾波器(BPF)��； 參考：《電子科技大學(xué)》2017年碩士論文

【摘要】：隨著無(wú)線通信技術(shù),尤其是其中的微波和毫米波技術(shù)的迅猛發(fā)展,對(duì)應(yīng)用于各類通信系統(tǒng)中的無(wú)源器件就提出了越來(lái)越高的要求。超寬帶技術(shù)因?yàn)橛兄軐挼墓ぷ鲙�、良好的保密性能以及很高的傳輸率等特點(diǎn)受到了極大的關(guān)注。超寬帶帶通濾波器和寬帶天線是整個(gè)超寬帶系統(tǒng)中不可或缺的器件,決定著整個(gè)通信系統(tǒng)的通訊質(zhì)量。因此對(duì)超寬帶無(wú)源器件(超寬帶濾波器、超寬帶天線等)的研究就顯得十分重要和迫切。本文對(duì)超寬帶系統(tǒng)中的一些關(guān)鍵無(wú)源器件進(jìn)行了研究,主要進(jìn)行了以下幾個(gè)方面的工作:首先,對(duì)應(yīng)用于超寬帶無(wú)線通信系統(tǒng)中的超寬帶帶通濾波器以及寬帶天線的研究現(xiàn)狀進(jìn)行了簡(jiǎn)單的介紹,并且介紹了濾波器和天線的一些重要的性能參數(shù)。其次,提出了幾個(gè)共面波導(dǎo)和微帶混合結(jié)構(gòu)的濾波器。通過(guò)引入交指耦合線和環(huán)形諧振器使得濾波器的選擇性得到了極大的改善。此外,通過(guò)引入耦合T型短路枝節(jié)實(shí)現(xiàn)了帶陷波的濾波器,在8.2GHz處的最大衰減達(dá)到了42dB。然后,提出和分析了一種新型的缺陷微帶結(jié)構(gòu)諧振器,并且基于該諧振器設(shè)計(jì)了一個(gè)超寬帶帶通濾波器。為了進(jìn)一步改善濾波器的選擇性,設(shè)計(jì)并加工了一個(gè)改進(jìn)型的超寬帶帶通濾波器。測(cè)試結(jié)果表明,該濾波器的3 dB工作帶寬達(dá)到了133%(2.3到11.5 GHz),并且在2.7到11.3 GHz內(nèi)的回波損耗優(yōu)于14 dB,中心頻率附近的插入損耗小于0.4 dB。除此之外,在本文中還提出了幾個(gè)緊湊型的超寬帶濾波器。最后,設(shè)計(jì)了一種改進(jìn)型的[豓ivaldi天線和兩個(gè)新型的平衡[豓ivaldi天線。由于在天線孔徑的中間處加入了一個(gè)復(fù)合金屬貼片當(dāng)作引向器,使得天線的增益和波束偏離得到了顯著的改善。測(cè)試結(jié)果表明,文中提出的[豓ivaldi天線的增益在高于7 GHz時(shí)大于10 dBi,并且在17到30 GHz頻率范圍內(nèi)大于15 dBi。提出的兩個(gè)平衡[豓ivaldi天線同樣具備良好的性能,比如不錯(cuò)的端射特性、低的交叉極化、緊湊的尺寸、相對(duì)高的增益以及極寬的工作帶寬(2到40 GHz),使得其能夠較好的用于相控陣、超寬帶系統(tǒng)和RCS成像等。
[Abstract]:With the rapid development of wireless communication technology, especially microwave and millimeter-wave technology, the passive devices used in various communication systems are required more and more. Ultra-wideband (UWB) technology has attracted much attention because of its wide bandwidth, good security and high transmission rate. UWB bandpass filters and wideband antennas are indispensable devices in the whole UWB system, which determines the communication quality of the whole communication system. Therefore, the study of UWB passive devices (UWB filters, UWB antennas, etc.) is very important and urgent. In this paper, some key passive devices in UWB system are studied. The main works are as follows: first, The research status of UWB bandpass filters and wideband antennas used in UWB wireless communication systems is briefly introduced, and some important performance parameters of filters and antennas are also introduced. Secondly, several coplanar waveguide and microstrip filters are proposed. The filter selectivity is greatly improved by introducing interDigital coupling line and ring resonator. In addition, the filter with notch wave is realized by introducing the coupling T-type short circuit branch, and the maximum attenuation at 8.2GHz reaches 42 dB. Then, a novel defective microstrip resonator is proposed and analyzed, and an ultra-wideband bandpass filter based on the resonator is designed. In order to improve the selectivity of the filter, an improved UWB band-pass filter is designed and fabricated. The test results show that the bandwidth of the filter reaches 133dB from 2.3 to 11.5 GHz, and the return loss is better than 14 dB in the range of 2.7 to 11.3 GHz, and the insertion loss near the center frequency is less than 0.4 dB. In addition, several compact UWB filters are proposed in this paper. Finally, an improved [? Ivaldi Antenna and two New Equilibrium [? Ivaldi antenna. Due to the addition of a composite metal patch to the center of the antenna aperture, the gain and beam deviation of the antenna are greatly improved. The test results show that the proposed [? The gain of the ivaldi antenna is greater than 10dBiwhen it is higher than 7 GHz, and is larger than 15dBiin the frequency range of 17 to 30 GHz. Two proposed balances [? The ivaldi antenna also has good performance, such as good end-to-end characteristics, low cross-polarization, compact size, relatively high gain, and extremely wide operating bandwidth of 2 to 40 GHz, making it better for phased arrays. UWB system and RCS imaging.
【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】：2017
【分類號(hào)】：TN713;TN822

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 劉紅喜;高軍;曹祥玉;劉艷芳;張迪;李思佳;;一種基于開(kāi)口諧振環(huán)的高增益端射天線設(shè)計(jì)[J];物理學(xué)報(bào);2015年23期

2 楊自強(qiáng);陳濤;彭浩;楊濤;劉宇;;一種基于微帶與槽線過(guò)渡結(jié)構(gòu)的超寬帶功分器[J];壓電與聲光;2013年06期

3 董楠,程受浩,劉華,徐德華;超寬帶螺旋天線的仿真設(shè)計(jì)[J];制導(dǎo)與引信;2005年02期

相關(guān)碩士學(xué)位論文 前1條

1 王志剛;超寬帶微帶帶通濾波器的設(shè)計(jì)[D];燕山大學(xué);2012年

，

本文編號(hào)：1885695