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Electromagnetic wave reflecting surface capable of realizing high directionality and multi-frequency band

A reflective surface and multi-band technology, applied in the direction of electrical components, antennas, etc., can solve the problems of large volume, inability to achieve high directional radiation of a single antenna, and inability to achieve the isolation effect of microwave circuit components, achieving high efficiency and low cost Effect

Inactive Publication Date: 2005-09-28
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recently, there are several reports on the use of photonic crystal resonators or resonators realized with left-handed materials to realize high-directivity antennas, but the volume must be made very large.
In short, without using the array antenna and the cavity structure, the high directional radiation of a single antenna cannot be achieved by using the existing planar substrate composed of a single resonant unit
In addition, in microwave circuits, since the existing electromagnetic wave resonant surface has only one surface wave band gap, simultaneous suppression of surface waves in multiple frequency bands or complete suppression of surface waves in a certain mode cannot be achieved, and microwave circuits cannot be achieved. The desired isolation effect of the components in the

Method used

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  • Electromagnetic wave reflecting surface capable of realizing high directionality and multi-frequency band
  • Electromagnetic wave reflecting surface capable of realizing high directionality and multi-frequency band
  • Electromagnetic wave reflecting surface capable of realizing high directionality and multi-frequency band

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Embodiment 1

[0032] Please refer to the attached figure 1 . The present invention is an electromagnetic wave reflecting surface composed of a 5-degree symmetrical quasi-periodic structure arrangement, which is composed of a metal patch on the upper surface, a metal base plate on the lower base plate, and a metallized guide hole connecting the upper and lower metal layers. The structure does not have translational symmetry. only have rotational symmetry. The two types of diamonds on the upper surface have the same side length of 7.366 mm, and the acute angles are 36 degrees and 72 degrees respectively. The density is 1.6 mm, the dielectric constant is 2.2, and the area size of the entire sample is 190.0×190.0 mm2. The invention adopts the monopole and the dipole antenna to respectively carry out the surface wave measurement of TM and TE modes. In TM surface wave measurement, two monopole antennas are used as transmitting and receiving antennas respectively on the measured material of the...

Embodiment 2

[0035] Please refer to the attached figure 2 . The present invention is an electromagnetic wave resonant surface composed of octave symmetrical quasi-periodic arrangement, and the structure arrangement is the same as figure 1 , which are composed of rhombuses with acute angles of 45 degrees and 90 degrees respectively, the side length of the rhombus is 7.62 mm, the slot spacing is 0.508 mm, the diameter of the guide hole is 0.7 mm, the thickness is 1.6 mm, the dielectric constant is 2.2, and the material area is 204.6×204.6 square millimeters.

[0036]The measurement results of the surface wave transmission spectrum are as follows Figure 9 , where the TM surface wave transmission spectrum of the metal surface is shown as the curve marked by the triangle, the circle marks the TM surface wave transmission spectrum measurement curve on the 8-degree quasi-periodic structure, and the square marks represent the TE surface wave on the 8-degree quasi-periodic structure The transm...

Embodiment 3

[0039] Please refer to the attached image 3 , 4 and 5. The upper surface of the present invention is composed of two kinds of resonant units of triangle and pentagon with Figure 4 with Figure 5 The symmetrical structure is arranged periodically. The metal patch on the upper surface is connected to the metal of the lower base plate through metallized guide holes. Their area ratio is 1:2. They are divided into square resonant units according to this ratio. The square The side length of the unit is 6.6 mm, the distance between the two resonant units in the figure is 0.6 mm, the diameter of the guide hole is 0.7 mm, the thickness of the board is 1.6 mm, the dielectric constant is 2.2, and the material area is 204.6×204.6 square millimeters.

[0040] Similarly, the self-made monopole antenna and dipole antenna are used to measure the surface wave transmission spectrum similar to the above measurement method, and the results are as follows Figure 10 shown. The straight line...

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Abstract

The present invention relates to an electromagnetic wave reflection surface capable of implementing high directionality and multiband which can be used as electromagnetic wave resonance surface material for making antenna baseplate design and microwave circuit isolation. It is characterized by that the upper surface of said surface is formed from two different resonant units which are arranged according to the periodic or quasi-periodic structure mode, and every resonant unit is formed from metal paster and metallized guide hole connected with metal lower baseplate, and every resonant unit has respective different resonant frequency.

Description

technical field [0001] The present invention relates to an electromagnetic wave resonant surface material that can be used in antennas and microwave circuits, and further relates to multiple surface wave band gaps, especially the complete suppression of surface waves in transverse electric modes on quasi-periodic structures, and high directional radiation and antennas. Materials with multi-band radiation characteristics. Background technique [0002] In the prior art, the lower base plate of the electromagnetic wave resonant surface is made of metal, and the upper base plate is composed of a single resonant unit periodically arranged, and the metal patch of each resonant unit is connected to the metal lower base plate through a metalized guide hole. The resonant unit generates magnetic resonance at a certain frequency. At this time, for a plane wave incident at the resonant frequency, since the reflected wave generated by this surface is in phase with the...

Claims

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Application Information

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IPC IPC(8): H01Q15/14H01Q19/10
Inventor 李宏强秦亚琴魏泽勇陈亮张冶文陈鸿
Owner TONGJI UNIV
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