Phased array antenna

Abstract

A phased array antenna includes a variable phase shifting device configured by using a variable dielectric constant dielectric body whose dielectric constant is varied by an electric field applied. When the variable phase shifting device is divided into a group of right side tilt and a group of left side tilt, phase amounts of which are controlled independently of each other, it is possible to eliminate a DC inhibit element causing mismatch and realize one having a beam shape which is little deformed during beam tilt. The phased array antenna includes a power supply phase shifting unit (130) having at least a ground conducting layer (117), an insulating layer (118), a main conducting layer (119), a variable dielectric constant dielectric layer (120), and a sub constructing layer (121) which are layered in this order. The power supply phase shifting unit has a propagation characteristic variable line (105) having a line on a region of the sub conducting layer superposed on the line on the main conducting layer. By applying a bias voltage between the main conducting layer and the sub conducting layer, it is possible to change the dielectric constant of the variable dielectric constant dielectric body of the propagation characteristic variable line portion so as to control the propagation characteristic. This eliminates the need of a DC inhibit element inserted in series to the power supply line.

Description

technical field [0001] The invention relates to a phased array antenna. [0002] In more detail, in a phased array antenna having a variable phase shifter constituted using a variable permittivity dielectric whose permittivity changes according to an applied electric field, it is possible to achieve less distortion of the beam shape even when the beam is tilted. , and can maintain high directional gain antenna technology. Background technique [0003] 1) First, Background Art 1 will be described. [0004] Conventionally, as a phased array antenna having a variable phase shifter constructed using a variable permittivity dielectric whose permittivity changes according to an applied electric field, there is an antenna in which the variable phase shifter is divided into right-side tilt By controlling the phase shift amounts of these two groups independently for the left and left tilt, the deviation of the power distributed to each antenna element and the deviation of the phase...

AI Technical Summary

Problems solved by technology

[0122] Therefore, when the above-mentioned background technology is directly implemented, there are the following problems: deviations occur in the phase characteristics, deviations occur in the variable permittivity characteristics of a plurality of variable phase shifters, and the beam shape is distorted when the beam is tilted, and the beam direction decreased sex

In addition, in the case of aligning liquid crystals, the orientation cannot be made constant after injection.

In addition, in the case of forming a complex of liquid crystal and resin, there is a problem that the reaction cannot be achieved at the same ratio

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