本文關(guān)鍵詞： 饋電網(wǎng)絡(luò) 功率分配器 移相器 耦合器 帶阻濾波器 雙頻圓極化天線　出處：《北京郵電大學(xué)》2014年博士論文　論文類型：學(xué)位論文

【摘要】：饋電網(wǎng)絡(luò)是天線、陣列天線、相控陣?yán)走_(dá)等的重要組成部分。性能優(yōu)良的陣列天線不僅需要良好的輻射單元,與之相匹配的饋電網(wǎng)絡(luò)的性能也是至關(guān)重要的。常用饋電網(wǎng)絡(luò)由功率分配器、移相器、耦合器、濾波器等電路組成,以實(shí)現(xiàn)阻抗匹配、幅度相位控制、諧波抑制等功能。隨著通信技術(shù)的發(fā)展,多標(biāo)準(zhǔn)多頻帶通信網(wǎng)絡(luò)共存,小型多模多頻通信終端要求越來越高,天線的體積、重量和多頻/寬頻性能是天線研究與制造要考慮的主要關(guān)鍵因素,饋電網(wǎng)絡(luò)作為天線組成的一部分,也面臨體積小、重量輕、多頻/寬頻特性設(shè)計(jì)的挑戰(zhàn)。近年來,微帶線因其厚度小、質(zhì)量小等優(yōu)點(diǎn)成為微波器件常用的結(jié)構(gòu),本文在微帶線理論的基礎(chǔ)上,實(shí)現(xiàn)了新型雙頻功分器、移相器、寬帶耦合器及雙頻帶阻濾波器等結(jié)構(gòu),并用新型饋電網(wǎng)絡(luò)成功實(shí)現(xiàn)了一款雙頻圓極化天線及一組天線陣。論文的主要貢獻(xiàn)如下： (1)雙頻功分器研究方面,提出了三種雙頻功率分配器結(jié)構(gòu)。一種是基于耦合線的雙頻Wilkinson功分器,該功分器結(jié)構(gòu)簡(jiǎn)單緊湊,滿足負(fù)載阻抗為任意實(shí)數(shù)值的情況,論文給出了理論分析和參數(shù)設(shè)計(jì)公式；第二種是適用于大功率環(huán)境的基于耦合線的雙頻Gysel功分器,論文給出了理論分析和參數(shù)設(shè)計(jì)約束條件；第三種雙頻功分器結(jié)構(gòu)為在上一種Gysel功分器基礎(chǔ)上進(jìn)行的廣義推廣,實(shí)現(xiàn)了內(nèi)在阻抗匹配功能,滿足源阻抗和負(fù)載阻抗為任意實(shí)數(shù)值的情況,該功分器設(shè)計(jì)自由度更大,有7個(gè)變量自由度,頻率比范圍更寬,達(dá)到1.19-3.51,論文給出了嚴(yán)格的理論推導(dǎo)并得出設(shè)計(jì)參數(shù)的解析解,最后進(jìn)行了理想電路計(jì)算、全波電磁仿真及微帶電路實(shí)驗(yàn)驗(yàn)證。這部分主要研究成果已在SCI檢索期刊The Scientific World Journal等雜志上發(fā)表。 (2)移相器研究方面,提出了一款基于微帶扇形支節(jié)的平面結(jié)構(gòu)的移相器。該移相器結(jié)構(gòu)簡(jiǎn)單,體積小,可靈活實(shí)現(xiàn)任意度數(shù)相移,相比傳統(tǒng)矩形微帶支節(jié),扇形支節(jié)具有低特性阻抗的特點(diǎn),該結(jié)構(gòu)可以作為簡(jiǎn)單平面結(jié)構(gòu)移相器的一個(gè)選擇。論文分析了扇形支節(jié)幾何參數(shù)與移相器性能的關(guān)系,給出了理想電路計(jì)算、全波電磁仿真及微帶電路實(shí)驗(yàn)驗(yàn)證。 (3)耦合器研究方面,提出了一款三端口寬帶耦合器。該耦合器由雙頻功分器及移相器組成,能實(shí)現(xiàn)寬帶移相器功能,且頻率實(shí)現(xiàn)范圍可靈活配置,參數(shù)計(jì)算簡(jiǎn)單,不需要復(fù)雜計(jì)算公式,論文給出了理想電路計(jì)算、全波電磁仿真及微帶電路實(shí)驗(yàn)驗(yàn)證,實(shí)驗(yàn)數(shù)據(jù)顯示用該結(jié)構(gòu)實(shí)現(xiàn)的一款工作于頻率為2.6GHz的三端口耦合器90°±10°移相的帶寬可達(dá)92.7%。 (4)雙頻帶阻濾波器研究方面,提出了一款基于耦合線的雙頻帶阻濾波器。該濾波器結(jié)構(gòu)簡(jiǎn)單緊湊,頻率比解析可調(diào),阻帶選擇性高,論文給出了詳細(xì)的理論分析、參數(shù)設(shè)計(jì)公式,以及理想電路計(jì)算、全波電磁仿真及微帶電路實(shí)驗(yàn)驗(yàn)證,實(shí)驗(yàn)數(shù)據(jù)顯示用該結(jié)構(gòu)實(shí)現(xiàn)的一款阻帶中心頻率分別為0.84GHz和1.16GHz的雙頻帶阻濾波器的3dB阻帶帶寬分別為24.4%和17.2%。這部分主要研究成果已在SCI檢索期刊Electronics Letters雜志上發(fā)表。 (5)饋電網(wǎng)絡(luò)的應(yīng)用研究方面,用本論文提出的饋電網(wǎng)絡(luò)成功實(shí)現(xiàn)一款雙頻圓極化天線和一組天線陣。用本論文提出的寬帶耦合器作為雙頻圓極化天線饋電網(wǎng)絡(luò),實(shí)現(xiàn)了工作于2.1GHz (UMTS, Universal Mobile Telecommunication Systems)頻段和2.45GHz(WLAN, Wireless Local Area Network)頻段的小頻率比雙頻圓極化天線,頻率比為1.167；用本論文提出的雙頻Gysel功分器作為天線陣的饋電網(wǎng)絡(luò),實(shí)現(xiàn)了含四個(gè)天線陣元的雙頻圓極化天線陣,天線增益最大提高了5.7dBi,兩個(gè)頻段的3dB軸比帶寬分別增加了19%和95%。天線實(shí)驗(yàn)測(cè)試結(jié)果進(jìn)一步驗(yàn)證了本論文所提出的饋電網(wǎng)絡(luò)的可行性與實(shí)用性。
[Abstract]:Feed network is antenna, antenna array, an important part of the phased array radar. The array antenna with good performance requires not only good radiation unit, feed network to match the performance is critical. The commonly used feed network by power divider, phase shifter, coupler, filter circuit, to achieve impedance matching, amplitude phase control, harmonic suppression and other functions. With the development of communication technology, multi standard multi band communication network coexistence, small multi-mode multi frequency communication terminal requirements more and more high, antenna volume, weight and multi frequency / broadband performance is the research and manufacture of antenna to be considered key factors, as part of the feed network composed of antenna also, with small size, light weight, multi frequency / broadband characteristics design challenges. In recent years, the microstrip line because of its advantages such as small thickness, quality become the structure of micro wave devices commonly used, Based on the theory of microstrip line, the new dual frequency power divider, phase shifter, wideband coupler and dual band band stop filter are implemented. A dual frequency circularly polarized antenna and a set of antenna arrays have been successfully implemented with the new feed network. The main contributions of the paper are as follows:
(1) is of dual frequency power, puts forward three kinds of dual frequency power divider structure. One is the dual frequency Wilkinson power divider based on coupled line, the power divider has simple and compact structure, meet the load impedance for any real value, this paper gives the theoretical analysis and parameter design formula; the second is suitable for high power environment coupling line based on dual frequency Gysel power divider, the paper gives the theoretical analysis and parameter design constraints; generalized third kinds of dual frequency power divider structure for a Gysel power divider based on the realization of the impedance matching function, meet the source and load impedances for any real value, the power divider design more freedom, there are 7 variable degrees of freedom, the frequency ratio of a wider range, up to 1.19-3.51, this paper gives analysis of the strict theoretical derivation and solution of the design parameters are obtained, finally The ideal circuit calculation, full wave electromagnetic simulation and microstrip circuit experimental verification have been published in SCI search Journal The Scientific World Journal and other magazines.
(2) of the phase shifter, a phase shifter is proposed based on planar microstrip stub fan. The phase shifter has the advantages of simple structure, small volume, flexible implementation of arbitrary degree phase shift, compared with the traditional rectangular microstrip stub, the characteristics of sector support section has low characteristic impedance, the structure can be used as a choose a simple plane structure of phase shifter. This paper analyzes the relationship between the fan branch section geometry parameters and phase shifter performance, calculation of ideal circuit is given, the full wave electromagnetic simulation and microstrip circuit experiments.
(3) coupler research, proposed a three port broadband coupler. The coupler is composed of dual frequency divider and the phase shifter which can realize the wideband phase shifter, and the frequency range to achieve flexible configuration parameters, simple calculation, without complicated calculation formula, thesis gives ideal circuit calculation, full wave electromagnetic the simulation and experimental verification of the microstrip circuit, the experimental data show that the structure of a work in the frequency of three port coupler 2.6GHz 90 degrees - 10 degrees phase shift bandwidth of up to 92.7%.
(4) the research of dual band stop filter, based on a coupled line dual band bandstop filter is presented. The filter has simple and compact structure, adjustable frequency ratio analysis, resistance with high selectivity, the paper gives a detailed theoretical analysis, parameter design and calculation formula of ideal circuit, full wave electromagnetic simulation and microstrip circuit experimental verification, the experimental data show that using this structure to achieve a stopband center frequency bandwidth were 3dB resistance and 1.16GHz 0.84GHz dual band bandstop filter with 24.4% and 17.2%. respectively in this part of the main research results have been published in SCI journals Electronics Letters magazine.
(5) application of the feed network, this paper proposed feed network of the successful implementation of a dual band circularly polarized antenna and antenna array is proposed. A group with the broadband coupler as a dual band circularly polarized antenna feed network, implemented in 2.1GHz (UMTS, Universal Mobile Telecommunication Systems 2.45GHz (WLAN) and band Wireless Local, Area Network) band small frequency ratio of dual band circular polarization antenna, the frequency ratio is 1.167; dual frequency Gysel power divider is proposed in this paper as the feed network of the antenna array, the dual band circular polarization antenna array with four antennas, antenna gain is improved 5.7dBi, 3dB axis two the frequency bandwidth ratio were increased by 19% and 95%. antenna experiment results further verified the feasibility and practicability of the proposed feed network.

【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN820.15

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本文編號(hào)：1453186