-
摘要: 设计了一种工作于Ka波段的、用于近距离散射测量的四单元紧凑型阵列天线,在阵列近场实现了较均匀的幅相分布.辐射单元由角锥喇叭天线和E面金属板透镜天线组成.馈电网络由魔T、弯波导组成,为各辐射单元提供等幅同相馈电.采用阵列形式和采用透镜调节喇叭口面相位,都较大程度地减小了阵列的纵向尺寸,且电性能也有明显改善.给出了阵列天线近场的测试结果,并对测试结果进行了分析.在距离阵列口面0.5m处,在与阵列宽度相同的范围内,幅度和相位波动分别在±2.5dB和±25°左右.Abstract: A four-element compact array antenna was designed operating in Ka band for near-field scattering measurements, and an approximately uniform amplitude and phase distribution in the near fields of array antenna was achieved. The radiating element consists of pyramidal horn antenna and E-plane metal-lens antenna. The feed network consists of magic T and bend waveguides, providing equal magnitude and phase signals for radiating elements. The lengthways length of the array is significantly reduced by employing array and E-plane metal-lens antenna, and the electrical performance is also improved. The near fields of array antenna was tested, and the test results were analyzed. In the plane 0.5 m from the aperture of the array with width equal to that of the array, the amplitude and phase ripples are around ±2.5 dB and ±25° respectively.
-
Key words:
- antennas /
- arrays /
- lenses /
- scattering /
- near field
-
[1] Johnson R,Ecker H,Moore R .Compact range techniques and measurement[J].Antennas Propagat,IEEE Transactions on ,1969,17(5):568-575 [2] Hill D A,KoepkeG H.A near-field array of Yagi-Uda antennas for electromagnetic-susceptibility testing[J].Electromagn Compat,IEEE Transactions on,1986,28(4):170-178 [3] Excell P S,Jackson N N,Wong K T.Compact electromagnetic test range using an array of log-periodic antennas[J].Microwaves,Antennas and Propagation,IEEE Proceedings H,1993,140(2):101-106 [4] Haupt R.Generating a plane wave with a linear array of line sources[J].Antennas Propagat,IEEE Transactions on,2003,51(2):273-278 [5] Kock W E.Metal-lens antennas[J].Proceeding of the IRE and Waves and Electrons,1946,34(11):828-836 [6] Henry Jasik.Antenna engineering handbook[M].New York:McGraw-Hill,1961:14(31)-14(39) [7] Lengyel Bela A.Reflection and transmission at the surface of metal-plate media[J].Journal of Applied Physics,1951,22(3):265-276 [8] Kraus J D,Ronald J.Marhefka antennas:for all applications[M].3rd ed.Beijing:Publishing House of Electronic Industry,2008:607-625 -
点击查看大图
计量
- 文章访问数: 586
- HTML全文浏览量: 119
- PDF下载量: 1076
- 被引次数: 0
下载:
