新型宽带定向天线的设计与实现
发布时间：2018-08-15 13:54
【摘要】：随着互联网的快速发展,人们对于多媒体信息的快速传递有着越来越高的要求,这一现象推动着移动通信系统向着宽带化方向前进。与此同时,工作在多个频段的移动通信系统促进着天线向多频带方向发展。基于以上研究背景,本文做了如下研究:1.对宽带电磁互补偶极子天线进行了研究。该天线由宽带窄缝辐射体和电偶极子组成,其中窄缝辐射体是在中间缝隙产生的二分之三波长电场为零的地方,引入一对短缝隙,通过调节短缝隙的长度以及短缝隙之间的距离,可以使二分之三波长的谐振模靠近半波长的谐振模,最终形成宽带效应。由于天线是在缝隙的中间位置进行馈电,理论上任何偶次谐振模都不会存在。经过实物加工和测量,此电磁互补天线的相对带宽为40.2%,并且频带内存在两个谐振频点。2.对三种宽带蝶形平面天线进行了研究。第一种天线结构由等切角蝶形贴片和L形微带线组成。该天线只有一个工作频带,|S11|-15dB的相对带宽为38%,覆盖了1.7-2.5 GHz频段,并且频带内辐射方向图稳定,交叉极化很小。第二种天线结构由等切角蝶形贴片和不等边T形微带线组成。该天线有两个工作频带,|S11|-15dB的相对带宽为分别为43.6%和16.2%,覆盖了1.56-2.43GHz频段和3.0-3.51GHz频段。该天线频带内辐射方向图稳定,但是交叉极化比第一种天线要差一些。第三种天线结构由不等切角蝶形贴片和不等边T形微带线组成。该天线有三个工作频带,|S11|-10dB的相对带宽为分别为68%,14.98%和7%,覆盖了1.6-3.25GHz频段,3.52-4.09 GHz频段和5.83-6.28GHz频段。
[Abstract]:With the rapid development of the Internet, people have more and more high requirements for the rapid transmission of multimedia information. This phenomenon promotes the mobile communication system to move towards the direction of broadband. At the same time, mobile communication systems operating in multiple frequency bands promote the development of antenna to multi-band. Based on the above research background, this paper does the following research: 1. The broadband electromagnetic complementary dipole antenna is studied. The antenna consists of a wide band narrow slit radiator and an electric dipole, in which a pair of short slits are introduced where the 3/2 wavelength electric field generated by the middle slot is zero. By adjusting the length of the short gap and the distance between the short gaps, the resonant mode of 3/2 wavelength can be close to the half wavelength resonant mode, and the broadband effect will finally be formed. Since the antenna is fed in the middle of the slot, theoretically no even resonant mode exists. After physical processing and measurement, the relative bandwidth of the electromagnetic complementary antenna is 40.2 and there are two resonance frequency points. Three kinds of wideband butterfly planar antennas are studied. The first antenna structure consists of an equal-tangent butterfly patch and a L-shaped microstrip line. The antenna has only one working band, and the relative bandwidth of S11-15dB is 38. It covers the 1.7-2.5 GHz band, and the radiation pattern is stable and the cross-polarization is very small. The second antenna structure consists of an equal-tangent butterfly patch and a non-equilateral T-shaped microstrip line. The antenna has two operating bands. The relative bandwidth of the S11 -15dB is 43.6% and 16.2dB, respectively, covering the 1.56-2.43GHz band and the 3.0-3.51GHz band. The radiation pattern in the antenna band is stable, but the cross-polarization is worse than the first antenna. The third antenna structure consists of a butterfly patch with unequal tangent angle and a T-shaped microstrip line with unequal edges. The antenna has three operating bands, and the relative bandwidth of S 11 -10 dB is 68% and 7%, respectively, covering the 1.6-3.25GHz band 3.52-4.09 GHz band and the 5.83-6.28GHz band.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN822
本文编号：2184405
[Abstract]:With the rapid development of the Internet, people have more and more high requirements for the rapid transmission of multimedia information. This phenomenon promotes the mobile communication system to move towards the direction of broadband. At the same time, mobile communication systems operating in multiple frequency bands promote the development of antenna to multi-band. Based on the above research background, this paper does the following research: 1. The broadband electromagnetic complementary dipole antenna is studied. The antenna consists of a wide band narrow slit radiator and an electric dipole, in which a pair of short slits are introduced where the 3/2 wavelength electric field generated by the middle slot is zero. By adjusting the length of the short gap and the distance between the short gaps, the resonant mode of 3/2 wavelength can be close to the half wavelength resonant mode, and the broadband effect will finally be formed. Since the antenna is fed in the middle of the slot, theoretically no even resonant mode exists. After physical processing and measurement, the relative bandwidth of the electromagnetic complementary antenna is 40.2 and there are two resonance frequency points. Three kinds of wideband butterfly planar antennas are studied. The first antenna structure consists of an equal-tangent butterfly patch and a L-shaped microstrip line. The antenna has only one working band, and the relative bandwidth of S11-15dB is 38. It covers the 1.7-2.5 GHz band, and the radiation pattern is stable and the cross-polarization is very small. The second antenna structure consists of an equal-tangent butterfly patch and a non-equilateral T-shaped microstrip line. The antenna has two operating bands. The relative bandwidth of the S11 -15dB is 43.6% and 16.2dB, respectively, covering the 1.56-2.43GHz band and the 3.0-3.51GHz band. The radiation pattern in the antenna band is stable, but the cross-polarization is worse than the first antenna. The third antenna structure consists of a butterfly patch with unequal tangent angle and a T-shaped microstrip line with unequal edges. The antenna has three operating bands, and the relative bandwidth of S 11 -10 dB is 68% and 7%, respectively, covering the 1.6-3.25GHz band 3.52-4.09 GHz band and the 5.83-6.28GHz band.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN822
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