几种谐波抑制天线的研究与设计

发布时间：2018-02-28 07:08

本文关键词： 谐波抑制天线缺陷地共面波导圆极化　出处：《大连海事大学》2014年硕士论文　论文类型：学位论文

【摘要】：半导体制造技术的蓬勃发展,带动了集成电路的快速前进,为了满足由低频到高频的需求,出现了微波集成电路。随之而来的问题是,在保证电路尺寸、复杂度不变的情况下,使功率附加效率最大化。虽然应用有源天线能很好地解决这个问题,但仍需要对电路中的谐波进行抑制,否则将危害整个系统。起初是在有源天线和其他连接电路间增加滤波器,这会带来电路复杂度增加、成本上升等一系列问题,选择谐波抑制天线能有效地避免这些缺陷,针对此点,辽宁普天数码有限公司委托大连海事大学微波研究所进行相应内容的研发。本文研究设计了三种谐波抑制天线,分别是缺陷地结构、共面波导馈电结构以及圆极化结构。 (1)缺陷地结构谐波抑制天线：工作频率为2.45GHz,接地板上蚀刻有两个较小矩形,通过调节它们的相对位置和尺寸比例来抑制三次谐波。仿真结果表明,三次谐波的回波损耗在-1dB以上,基波达到-15dB以下,天线的增益为1.3dB。以上参数的实测结果分别是-2dB以上,-16dB和1.2dB。 (2)共面波导馈电的谐波抑制天线：工作频率为2.45GHz,二次谐波由调节T型匹配的长度来进行抑制,三次谐波的抑制则通过缺陷地结构实现。从仿真结果看,二次谐波和三次谐波的回波损耗均在-2dB以上,基波频率达到了-15dB以下,天线的增益为3.95dB。实测的数据分别为-2dB以上,-15dB和3.05dB。 (3)圆极化谐波抑制天线：工作频率为1.575GHz,采取同轴馈电和切角实现圆极化,在馈电点附近蚀刻对称结构充当谐振单元,通过调节谐振单元的尺寸改变其等效电感和电容值,从而使其等效电路的谐振频率发生变化,以达到抑制谐波的目的。经过仿真,二次谐波与三次谐波的回波损耗都在-1.5dB以上,基波频率达到了-15dB以下,轴比在1.572GHz～1.577GHz频段范围内小于3dB,增益达到7.37dB。上述参数实测分别为：高次谐波回波损耗抑制在-1.5dB以上,基波回波损耗为-15dB,1.575GHz的轴比达到3dB以下,增益为6.12dB。本文还对以上三种天线的其他一些重要参数进行了深入分析。
[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.

【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN822

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