JP2014150433A - Lamination structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a lamination structure having excellent band pass characteristics for positive polarization, and having excellent interruption characteristics for cross polarization.SOLUTION: A lamination structure comprises: a split ring layer 1 provided with gaps 1a, 1b vertically toward the paper surface of a square ring-like metal pattern; a dielectric layer 2; a grid layer 3 where a grid lattice-like metal pattern is formed; a dielectric layer 4; a grid layer 5 where a grid lattice-like metal pattern is formed; a dielectric layer 6; and a split ring layer 7 provided with gaps 7a, 7b vertically on the left side toward the paper surface of a square ring-like metal pattern, and gaps 7c, 7d vertically on the right side.

Description

  The present invention relates to a laminated structure of a structure such as a radome that houses an antenna.

  As a conventional laminated structure, it is related to a frequency selective surface (FSS) with a very low profile, and includes three dielectric layers, two grid metal periodic metal patterns, and two rectangular layers. There has been disclosed a technology that provides a ring-shaped periodic metal pattern and provides good band-pass characteristics (see Non-Patent Document 1 below).

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 56, NO. 12, DECEMBER 2008, "Multipole Spatial Filters Using Metamaterial-Based Miniaturized-Element Frequency-Selective Surfaces"

In order to reduce the influence from radio waves existing in the surrounding environment in which the antenna operates, the structure housing the antenna is required to have polarization characteristics and cutoff characteristics.
However, even if the technique disclosed in Non-Patent Document 1 is used, polarization dependency is not obtained, and when the antenna used as the accommodation target has linear polarization characteristics, unnecessary polarization also passes. There was a problem that it would end up.

  An object of the present invention is to obtain a laminated structure having good bandpass characteristics with respect to positive polarization and good cutoff characteristics with respect to cross polarization.

  The laminated structure of the present invention includes a plurality of dielectric layers, a plurality of grid layers in which a grid-like metal pattern is formed, and a plurality of ring layers in which square ring-shaped metal patterns are periodically arranged. The grid layer, the dielectric layer other than the first dielectric layer, and the ring layer are stacked in this order on both sides of the first dielectric layer of the plurality of dielectric layers. One or more gaps are formed in the rectangular ring-shaped metal pattern formed in at least one ring layer.

  According to the present invention, since one or more gaps are formed in the rectangular ring-shaped metal pattern formed in at least one of the plurality of ring layers, the positive polarization is good. There is an effect that it is possible to obtain a laminated structure having band-pass characteristics and good cut-off characteristics with respect to cross polarization.

It is a perspective view which shows the three-dimensional whole image of the laminated structure by Embodiment 1 of this invention. It is sectional drawing of the laminated structure by Embodiment 1 of this invention. It is a top view which shows the single-piece | unit structure of the split ring layer and grid layer which are loaded on the laminated structure by Embodiment 1 of this invention. It is sectional drawing of the laminated structure by Embodiment 2 of this invention. It is a top view which shows the single-piece | unit structure of the split ring layer and grid layer which are loaded on the laminated structure by Embodiment 3 of this invention. It is a top view which shows the single-piece | unit structure of the split ring layer and grid layer which are loaded on the laminated structure by Embodiment 4 of this invention.

Embodiment 1 FIG.
A laminated structure according to Embodiment 1 of the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view showing a three-dimensional overall view of a laminated structure, FIG. 2 is a cross-sectional view showing the laminated structure, and FIG. 3 is a plan view showing a unit structure of a split ring layer and a grid layer loaded in the laminated structure. is there.
Here, the unit structure is a minimum unit forming a periodic structure, and means one cell.

  The laminated structure according to the first embodiment has a split ring layer 1 having gaps 1a and 1b provided vertically on the paper surface of a square ring-shaped metal pattern, a dielectric layer 2, and a grid-like metal pattern. The formed grid layer 3, the dielectric layer 4, the grid layer 5 on which the grid-like metal pattern is formed, the dielectric layer 6, and the upper and lower sides on the left side of the paper surface of the rectangular ring-shaped metal pattern. The gap 7a, 7b is provided, and the split ring layer 7 provided with the gaps 7c, 7d on the upper and lower sides is laminated.

That is, the grid layers 3 and 5 are disposed on both sides in contact with the dielectric layer 4 which is the center of the layer structure, the dielectric layers 2 and 6 are disposed on both sides thereof, and the split ring layers 1 and 6 are disposed on the outside thereof. 7 is arranged.
They are stacked in this order.
Note that the rectangular ring-shaped metal patterns of the split ring layers 1 and 7 have a line-symmetric structure with respect to the center lines A and B.

In this laminated structure, it is important that a gap is provided only in the split ring layers 1 and 7, a rectangular ring-shaped metal pattern is formed in the split, and the grid layers 3 and 5 are not formed in the split.
By doing in this way, it becomes possible to constitute a laminated structure having good band-pass characteristics with respect to positive polarization and good cut-off characteristics with respect to cross polarization.

  In the first embodiment, the number of split ring layers is two, the number of grid layers is two, and the number of dielectric layers is three. However, the number of split ring layers is two. As described above, the number of grid layers may be two or more, and the number of dielectric layers may be three or more.

  As described above, according to the first embodiment, since the gap is provided only in the split ring layers 1 and 7 and the rectangular ring-shaped metal pattern is formed in the split, good bandpass characteristics are obtained with respect to positive polarization. It is possible to obtain a laminated structure having good cutoff characteristics with respect to cross polarization.

Embodiment 2. FIG.
A laminated structure according to the second embodiment of the present invention will be described with reference to FIG.
FIG. 4 is a cross-sectional view showing a laminated structure, and other features are the same as those of the first embodiment.

The split ring layers 1 and 7 and the grid layers 3 and 5 of the second embodiment are the same as those in FIG.
However, the arrangement of the split ring layers 1 and 7 and the grid layers 3 and 5 is different.
That is, in the laminated structure according to the second embodiment, split ring layers 1 and 7 are arranged on both sides in contact with the dielectric layer 4 which is the center of the layer structure, and dielectric layers 2 and 6 are arranged on both sides thereof. The grid layers 3 and 5 are disposed on the outer side.
They are stacked in this order.

  As described above, according to the second embodiment, since the gap is provided only in the split ring layers 1 and 7 and the square ring-shaped metal pattern is formed in the split, good bandpass characteristics are obtained with respect to the positive polarization. It is possible to obtain a laminated structure having good cutoff characteristics with respect to cross polarization.

Embodiment 3 FIG.
A laminated structure according to Embodiment 3 of the present invention will be described with reference to FIG.
FIG. 5 is a plan view showing the unit structure of the split ring layer and the grid layer loaded in the laminated structure, and other features are the same as those of the first embodiment.

The split ring layer 1 and the grid layers 3 and 5 of the third embodiment are the same as those in FIG.
However, the ring layer 17 is different.
In FIG. 3, the split ring layer 7 is provided with gaps 7a to 7d, but in FIG. 5, the ring layer 17 is not provided with gaps 7a to 7d.
In the laminated structure according to the second embodiment, grid layers 3 and 5 are arranged on both sides in contact with the dielectric layer 4 which is the center of the layer structure, and dielectric layers 2 and 6 are arranged on both sides thereof. The split ring layer 1 and the ring layer 17 are disposed outside.
They are stacked in this order.

In this laminated structure, it is important that a gap is provided only in the split ring layer 1 and a rectangular ring-shaped metal pattern is formed in the split.
By doing in this way, it becomes possible to constitute a laminated structure having good band-pass characteristics with respect to positive polarization and good cut-off characteristics with respect to cross polarization.

  As described above, according to the third embodiment, since the gap is provided only in the split ring layer 1 and the rectangular ring-shaped metal pattern is formed in the split, the positive polarization has good bandpass characteristics. A laminated structure having a good cutoff characteristic can be obtained for cross polarization.

Embodiment 4 FIG.
A laminated structure according to Embodiment 4 of the present invention will be described with reference to FIG.
FIG. 6 is a plan view showing the unit structure of the split ring layer and the grid layer loaded in the laminated structure, and other features are the same as those of the first embodiment.

The grid layers 3 and 5 of the fourth embodiment are the same as those in FIG.
However, the split ring layers 11 and 27 are different.
3, the split ring layer 1 is provided with gaps 1a and 1b, and the split ring layer 7 is provided with gaps 7a to 7d.
Further, the rectangular ring-shaped metal patterns of the split ring layers 1 and 7 have a line-symmetric structure with respect to the center lines A and B.

On the other hand, in FIG. 6, the split ring layer 11 is provided with a gap 1a upward toward the plane of the rectangular ring-shaped metal pattern, but is not provided with the gap 1b in FIG.
Further, in the split ring layer 27, a gap 7a is provided on the left side and a gap 7c is provided on the right side of the rectangular ring-shaped metal pattern, and the gaps 7b and 7d in FIG. Is not provided.
Further, the rectangular ring-shaped metal patterns of the split ring layers 11 and 27 are symmetrical with respect to the center line A, but are not symmetrical with respect to the center line B, and have an untargeted structure.

In the laminated structure according to the fourth embodiment, grid layers 3 and 5 are arranged on both sides in contact with the dielectric layer 4 which is the center of the layer structure, and dielectric layers 2 and 6 are arranged on both sides thereof. Split ring layers 11 and 27 are disposed outside.
They are stacked in this order.

In this laminated structure, a gap is provided only in the split ring layers 11 and 27, a rectangular ring-shaped metal pattern is formed in the split, and the grid layers 3 and 5 are not formed in the split, and the split ring layers 11 and 27 are formed. It is important that the rectangular ring-shaped metal pattern is formed in a split so as to be non-target.
By doing in this way, it becomes possible to constitute a laminated structure having good band-pass characteristics with respect to positive polarization and good cut-off characteristics with respect to cross polarization.

  As described above, according to the fourth embodiment, a gap is provided only in the split ring layers 11 and 27 to form a rectangular ring-shaped metal pattern in the split, and the rectangular ring-shaped of the split ring layers 11 and 27 is formed. Since the metal pattern is formed so as to be non-target, it is possible to obtain a laminated structure having good bandpass characteristics with respect to positive polarization and good cutoff characteristics with respect to cross polarization.

  In the present invention, within the scope of the invention, any combination of the embodiments, or any modification of any component in each embodiment, or omission of any component in each embodiment is possible. .

  1, 7, 11, 27 Split ring layer, 1a, 1b, 7a-7d gap, 2, 4, 6 dielectric layer, 3, 5 grid layer, 17 ring layer.

Claims (3)

A plurality of dielectric layers;
A plurality of grid layers on which a grid-like metal pattern is formed;
A plurality of ring layers in which rectangular ring-shaped metal patterns are periodically arranged;
On both sides of the first dielectric layer of the plurality of dielectric layers, the grid layer, a dielectric layer other than the first dielectric layer, and the ring layer are stacked in this order,
A laminated structure in which one or more gaps are formed in a rectangular ring-shaped metal pattern formed in at least one of the plurality of ring layers. A plurality of dielectric layers;
A plurality of grid layers on which a grid-like metal pattern is formed;
A plurality of ring layers in which rectangular ring-shaped metal patterns are periodically arranged;
On both sides of the first dielectric layer of the plurality of dielectric layers, the ring layer, a dielectric layer other than the first dielectric layer, and the grid layer are stacked in this order,
A laminated structure in which one or more gaps are formed in a rectangular ring-shaped metal pattern formed in at least one of the plurality of ring layers.   3. The laminated structure according to claim 1, wherein one or more gaps are formed so that the square ring-shaped metal pattern has a line-symmetric structure.

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