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Scanning antenna

A technology for scanning antennas and antennas, applied in the field of scanning antennas, can solve the problems of rising costs and high prices of phased array antennas

Active Publication Date: 2017-11-28
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high price of existing phased array antennas has become an obstacle to the popularization of consumer products
In particular, the cost rises significantly when the number of antenna units increases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0117] First, refer to figure 1 and figure 2 . figure 1 As described in detail, it is a schematic partial cross-sectional view near the center of the scanning antenna 1000, figure 2 (a) and figure 2 (b) are schematic plan views showing the TFT substrate 101 and the slot substrate 201 in the scanning antenna 1000, respectively.

[0118] The scanning antenna 1000 has a plurality of antenna units U arranged two-dimensionally, and in the scanning antenna 1000 illustrated here, the plurality of antenna units are arranged concentrically. In the following description, the region of the TFT substrate 101 and the region of the slot substrate 201 corresponding to the antenna unit U are referred to as "antenna unit region", and the same reference numeral U as that of the antenna unit is assigned. Additionally, if figure 2 (a) and figure 2 As shown in (b), in the TFT substrate 101 and the slot substrate 201, the area defined by a plurality of antenna unit areas arranged two-d...

no. 2 Embodiment approach

[0211] A scanning antenna according to a second embodiment will be described with reference to the drawings. The TFT substrate in the scanning antenna of this embodiment and figure 2 The TFT substrate 101 shown is different in that a transparent conductive layer serving as an upper connection portion of each terminal portion is provided between the first insulating layer and the second insulating layer in the TFT substrate.

[0212] Figure 8 (a)~ Figure 8 (c) is a cross-sectional view showing the gate terminal portion GT, the source terminal portion ST, and the transmission terminal portion PT of the TFT substrate 102 according to the present embodiment, respectively. right with Figure 4 The same components are denoted by the same reference numerals, and description thereof will be omitted. In addition, the cross-sectional structure of the antenna unit area U is the same as the above-mentioned embodiment ( image 3 ) are the same, so illustrations and descriptions are...

no. 3 Embodiment approach

[0229] A scanning antenna according to a third embodiment will be described with reference to the drawings. The TFT substrate in the scanning antenna of this embodiment and Figure 8 The illustrated TFT substrate 102 is different in that an upper connection portion including a transparent conductive film is not provided to the transmission terminal portion.

[0230] Figure 10 (a)~ Figure 10 (c) is a cross-sectional view showing the gate terminal portion GT, the source terminal portion ST, and the transmission terminal portion PT of the TFT substrate 103 according to the present embodiment, respectively. right with Figure 8 The same components are denoted by the same reference numerals, and description thereof will be omitted. In addition, the structure of the antenna unit area U is the same as that of the above-mentioned embodiment ( image 3 ) are the same, so illustrations and descriptions are omitted.

[0231] The structure of the gate terminal part GT and the sour...

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Abstract

A scanning antenna (1000) in which antenna units (U) are arranged includes: a TFT substrate (101) having a first dielectric substrate (1), TFTs, gate bus lines, source bus lines, and patch electrodes (15); a slot substrate (201) having a second dielectric substrate (51) and a slot electrode (55); a liquid crystal layer (LC) provided between the TFT substrate and the slot substrate; and a reflective conduction plate (65). The slot electrode has slots (57) arranged so as to correspond to the respective patch electrodes. In a case in which, when seen from the direction of the normal to the first dielectric substrate, regions within a distance of 0.3 mm from the edges of the slots are treated as first regions (Rp1) and regions within a distance of 0.3 mm from the edges of the patch electrodes are treated as second regions (Rp2), a plurality of spacer structures (75) provided between the TFT substrate and the slot substrate are arranged so as not to be superposed with the first regions and / or the second regions.

Description

technical field [0001] The present invention relates to scanning antennas, and more particularly to scanning antennas (sometimes also called "liquid crystal array antennas") having liquid crystal capacitors in antenna units. Background technique [0002] Antennas for mobile communication and satellite broadcasting require a function capable of changing the direction of a beam (referred to as "beam scanning" or "beam steering"). As an antenna having such a function (hereinafter referred to as "scanned antenna"), a phased array antenna having an antenna unit is known. However, the high price of conventional phased array antennas has hindered their popularization in consumer products. In particular, the cost increases significantly when the number of antenna units increases. [0003] Therefore, scanning antennas utilizing the large dielectric anisotropy (birefringence) of liquid crystal materials (including nematic liquid crystals and polymer-dispersed liquid crystals) have b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q3/34G02F1/13H01Q3/44H01Q13/22H01Q21/06
CPCH01Q3/34H01Q13/22H01Q21/06H01Q1/364G02F1/1313G02F1/1362G02F1/136213G02F2202/42G02F2203/62H01L27/1225G02F1/292H01Q3/44H01L27/124H01L29/66969G02F1/13394H01Q1/125H01Q1/243H01Q3/46H01Q3/242H01L23/66H01L27/1218H01L27/1262H01L29/66765H01L29/78669H01L29/78678H01L29/7869H01L2223/6677H01Q13/10
Inventor 中泽淳大类贵俊中村涉大竹忠中野文树箕浦洁
Owner SHARP KK
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