本文關(guān)鍵詞： 諧波抑制天線 缺陷地 共面波導(dǎo) 圓極化　出處：《大連海事大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：半導(dǎo)體制造技術(shù)的蓬勃發(fā)展,帶動(dòng)了集成電路的快速前進(jìn),為了滿足由低頻到高頻的需求,出現(xiàn)了微波集成電路。隨之而來的問題是,在保證電路尺寸、復(fù)雜度不變的情況下,使功率附加效率最大化。雖然應(yīng)用有源天線能很好地解決這個(gè)問題,但仍需要對(duì)電路中的諧波進(jìn)行抑制,否則將危害整個(gè)系統(tǒng)。起初是在有源天線和其他連接電路間增加濾波器,這會(huì)帶來電路復(fù)雜度增加、成本上升等一系列問題,選擇諧波抑制天線能有效地避免這些缺陷,針對(duì)此點(diǎn),遼寧普天數(shù)碼有限公司委托大連海事大學(xué)微波研究所進(jìn)行相應(yīng)內(nèi)容的研發(fā)。 本文研究設(shè)計(jì)了三種諧波抑制天線,分別是缺陷地結(jié)構(gòu)、共面波導(dǎo)饋電結(jié)構(gòu)以及圓極化結(jié)構(gòu)。 (1)缺陷地結(jié)構(gòu)諧波抑制天線：工作頻率為2.45GHz,接地板上蝕刻有兩個(gè)較小矩形,通過調(diào)節(jié)它們的相對(duì)位置和尺寸比例來抑制三次諧波。仿真結(jié)果表明,三次諧波的回波損耗在-1dB以上,基波達(dá)到-15dB以下,天線的增益為1.3dB。以上參數(shù)的實(shí)測(cè)結(jié)果分別是-2dB以上,-16dB和1.2dB。 (2)共面波導(dǎo)饋電的諧波抑制天線：工作頻率為2.45GHz,二次諧波由調(diào)節(jié)T型匹配的長(zhǎng)度來進(jìn)行抑制,三次諧波的抑制則通過缺陷地結(jié)構(gòu)實(shí)現(xiàn)。從仿真結(jié)果看,二次諧波和三次諧波的回波損耗均在-2dB以上,基波頻率達(dá)到了-15dB以下,天線的增益為3.95dB。實(shí)測(cè)的數(shù)據(jù)分別為-2dB以上,-15dB和3.05dB。 (3)圓極化諧波抑制天線：工作頻率為1.575GHz,采取同軸饋電和切角實(shí)現(xiàn)圓極化,在饋電點(diǎn)附近蝕刻對(duì)稱結(jié)構(gòu)充當(dāng)諧振單元,通過調(diào)節(jié)諧振單元的尺寸改變其等效電感和電容值,從而使其等效電路的諧振頻率發(fā)生變化,以達(dá)到抑制諧波的目的。經(jīng)過仿真,二次諧波與三次諧波的回波損耗都在-1.5dB以上,基波頻率達(dá)到了-15dB以下,軸比在1.572GHz～1.577GHz頻段范圍內(nèi)小于3dB,增益達(dá)到7.37dB。上述參數(shù)實(shí)測(cè)分別為：高次諧波回波損耗抑制在-1.5dB以上,基波回波損耗為-15dB,1.575GHz的軸比達(dá)到3dB以下,增益為6.12dB。 本文還對(duì)以上三種天線的其他一些重要參數(shù)進(jìn)行了深入分析。
[Abstract]:The vigorous development of semiconductor manufacturing technology, driven by the rapid advance of integrated circuit, in order to meet the demand from low frequency to high frequency, the microwave integrated circuits. The problem is, to ensure the circuit size and complexity at the same time, the power added efficiency maximization. Although the application of active antenna can be a good solution this problem, but still need to suppress harmonic circuit, otherwise it will damage the whole system. It is in active antenna and other circuits connected between the increased filter, this will bring about the complexity of the circuit increases, a series of problems such as rising costs, reduce the antenna can effectively avoid the defects of harmonic selection, on this point, research commissioned by the Dalian Maritime University Institute for microwave corresponding content Liaoning Putian Digital Limited.
In this paper, three kinds of harmonic suppression antennas are designed, which are the defect ground structure, the coplanar waveguide feed structure and the circular polarization structure.
(1) harmonic suppression antenna with Defected Ground Structure: the frequency of 2.45GHz, on the ground of etching with two smaller rectangles, by adjusting relative position and size to suppress their three harmonic. The simulation results show that the three harmonic echo loss in more than -1dB, Jiboda below -15dB, the gain of the antenna is measured 1.3dB. the above parameters result respectively is more than -2dB, -16dB and 1.2dB.
(2) harmonic suppression antenna with coplanar waveguide feed: the frequency of 2.45GHz, the two harmonic by regulating T type, length of suppression, three harmonic suppression is achieved through the defects in the structure. The simulation results show that the return loss of the two harmonic and three harmonics of the fundamental frequency are more than -2dB. At -15dB, the measured data for the 3.95dB. antenna gain is more than -2dB, -15dB and 3.05dB.
(3) inhibition of circular polarized antenna: harmonic frequency of 1.575GHz, adopts coaxial feed and cutting angle to achieve circular polarization at the feed point near the etching symmetric structure acts as resonant unit, by adjusting the resonant unit size changes the equivalent inductance and capacitance value, so that the resonant frequency of the equivalent circuit of the change, so as to suppress the purpose of harmonic. Through simulation, the return loss of the two harmonic and three harmonics in -1.5dB above, the fundamental frequency can reach -15dB, the axial ratio in 1.572GHz ~ 1.577GHz frequency range is less than 3dB, the gain is 7.37dB. the parameters measured were: harmonic echo loss suppression in -1.5dB above, the fundamental return loss of -15dB 1.575GHz, the axial ratio is less than 3dB, the gain is 6.12dB.
In this paper, some other important parameters of the above three kinds of antennas are analyzed in depth.

【學(xué)位授予單位】：大連海事大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN822

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本文編號(hào)：1546277