Scanning antenna and method for manufacturing scanning antenna
A technology of scanning antenna and manufacturing method, applied in the field of scanning antenna, can solve the problems of rising cost and high price of phased array antenna, and achieve the effect of improving antenna performance
Pending Publication Date: 2021-07-30
SHARP KK +1
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- Application Information
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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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[0072] Hereinafter, a scanning antenna, a method of manufacturing the scanning antenna, and a TFT substrate used for the scanning antenna according to the embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited to embodiment illustrated below. In addition, embodiment of this invention is not limited to drawing. For example, the thickness of the layer in the cross-sectional view, the size of the conductive portion and the opening portion in the plan view, and the like are examples.
[0073]
[0074] Using the large dielectric constant M(ε M ) Anisotropy (birefringence) of the antenna unit scanning antenna controls the voltage applied to each liquid crystal layer of the antenna unit corresponding to the pixel of the LCD panel, so that the effective dielectric constant of the liquid crystal layer of each antenna unit M(ε M ) is changed to form a two-dimensional pattern by antenna units with different e...
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Abstract
A scanning antenna has: a transmission / reception region (R1) including a plurality of antenna units (U); and a non-transmission / reception region (R2) outside the transmission / reception region. The scanning antenna has: a TFT substrate (101); a slot substrate (201); a liquid crystal layer (LC); a seal section (73a) surrounding the liquid crystal layer; a wall-shaped structure (additional seal section) (76A) disposed in a region of the non-transmission / reception region, the region being surrounded by the seal section; a reflecting conductive plate; a first spacer structure for specifying a first gap between a first dielectric substrate (1) and a second dielectric substrate (51) in the transmission / reception region; and a second spacer structure that specifies a second gap larger than the first gap and that is disposed in the wall-shaped structure. The wall-shaped structure has a first principal side surface (79a) and a second principal side surface (79b) that intersect a surface of the first dielectric substrate. When viewed in a normal direction of the first dielectric substrate, at least one of the first principal side surface and the second principal side surface has a plurality of recessed sections and / or a plurality of protruding sections.
Description
technical field [0001] The present invention relates to scanning antennas, in particular to antenna units (sometimes called "element antennas") with liquid crystal capacitors (sometimes called "liquid crystal array antennas"), and methods for manufacturing such scanning antennas. 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 existing phased array antennas has become an obstacle to 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 li...
Claims
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IPC IPC(8): H01Q3/34H01Q3/44H01Q13/22G02F1/13G02F1/1339H01L29/786
CPCH01L29/786H01Q3/28H01Q21/0012H01Q1/241H01Q21/24H01Q21/061G02F1/1339H01Q1/2283H01Q3/34H01Q13/22H01Q21/0087
Inventor 原猛中野晋安田浩二谷口洋二田中义规R·A·史蒂文森S·林恩C·瓦雷尔C·肖特F·陈
Owner SHARP KK