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JP-2026514371-A - Antenna device phase shifter

JP2026514371AJP 2026514371 AJP2026514371 AJP 2026514371AJP-2026514371-A

Abstract

[Problem] To provide a phase shifter for an antenna device that can prevent the appearance of the transmission line from becoming complicated. [Solution] The phase shifter of the antenna device includes a phase adjustment dielectric panel (hereinafter abbreviated as "phase dielectric") that is movable and positioned at a branching point of a transmission line, spaced apart from one side of the reflecting panel; an impedance matching dielectric panel (hereinafter abbreviated as "impedance dielectric") fixedly positioned alongside one side of the phase dielectric; and a moving clamp for moving the phase dielectric. The phase dielectric has an impedance matching step formed on the side facing the reflecting panel such that an air layer is formed. [Selection Diagram] Figure 16

Inventors

  • ドゥク ヨン キム
  • ヨン チャン ムン
  • スン ホヮン ソ
  • オー ソー チョイ
  • ヨン ウォン セオ
  • セン ハン ソン
  • ソン マン カン
  • ヒョン ソク ヤン
  • ドン へー シン

Assignees

  • ケーエムダブリュ・インコーポレーテッド

Dates

Publication Date
20260511
Application Date
20240328
Priority Date
20230329

Claims (14)

  1. A phase-adjusting dielectric panel (hereinafter abbreviated as "phase dielectric") is movable and positioned at a branch point of a transmission line that is spaced apart from one side of the reflecting panel, An impedance matching dielectric panel (hereinafter abbreviated as "impedance dielectric") fixedly arranged alongside one side of the phase dielectric, The moving clamp includes a moving clamp for moving the phase dielectric, The phase dielectric is a phase shifter for an antenna device, having a stepped impedance matching step formed on the surface facing the reflecting panel such that an air layer is formed on the surface facing the reflecting panel.
  2. The phase shifter for the antenna device according to claim 1, wherein the phase dielectric is disposed between any one surface of the reflecting panel and the transmission line in the form of an air strip line spaced apart from any one surface of the reflecting panel.
  3. If the transmission line has branching points where it branches into multiple branch lines so as to supply power to multiple radiating elements from the input line, The phase dielectric is formed to be long along the branch line, a phase shifter for an antenna device according to claim 1.
  4. A phase shifter for an antenna device according to claim 3, which transitions the phase values of the radiating elements in accordance with the change in dielectric constant due to the positional change of the phase dielectric.
  5. The impedance dielectric is arranged longitudinally between the input line and one of the reflecting panels at the branching point, The impedance matching step is formed within the longitudinal range of the impedance dielectric, wherein the phase shifter of the antenna device according to claim 3.
  6. A drive motor that is electrically driven to generate rotational force, The system further includes a plurality of vertical moving bars that are moved vertically on any one surface of the reflecting panel in response to a rotational force generated by the drive motor, The phase shifter for the antenna device according to claim 3, wherein the moving clamp is coupled to multiple locations on the multiple vertical moving bars to move the phase dielectric in the vertical direction.
  7. A pinion gear is connected to the rotating shaft of the aforementioned drive motor so as to rotate axially. The phase shifter for an antenna device according to claim 6, wherein the plurality of vertical moving bars are moved vertically by an action in which the teeth of the rack gear section of a rack gear section provided on a connecting bar that connects the plurality of vertical moving bars mesh with the teeth of the pinion gear of the pinion gear.
  8. The moving clamp comprises a clamp body fixed to the vertical moving bar via a bridge bar extending perpendicularly from the vertical moving bar, A coupling dielectric is coupled to the back surface of the clamp body and mediates the coupling of the phase dielectric to the clamp body across the transmission line, A phase shifter for an antenna device according to claim 6, comprising an elastic portion provided on the clamp body for elastically supporting the transmission line toward the phase dielectric side.
  9. The aforementioned transmission line is A first transmission line is positioned in front of the reflecting panel and supplies power to a first radiating element associated with a radiating beam in a first frequency band, The reflecting panel includes a second transmission line that is positioned on the back of the reflecting panel and supplies power to a second radiating element associated with a radiating beam in a second frequency band, The phase shifter of the antenna device according to claim 6, wherein the drive motor, a plurality of vertical moving bars, and the moving clamp are separately provided so as to be involved with the first transmission line and the second transmission line, respectively.
  10. When multiple radiating elements are arranged at vertically separated intervals at each end of the aforementioned branch line, and each radiating element is arranged such that the distance between adjacent radiating elements is the same, The phase shifter for the antenna device according to claim 6, wherein the impedance matching step of the phase dielectric is formed so that the phase values formed by the plurality of radiating elements are the same, thereby achieving a phase difference.
  11. When the branching point is defined as the upper end of the input line as the first branching point, and the tips of the upper and lower transmission lines branching from the first branching point, where they each branch into three branch transmission lines, are defined as the second and third branching points, respectively, The phase shifter for the antenna device according to claim 10, wherein the phase dielectric is positioned to change the dielectric constant at each of the branching points.
  12. The phase shifter of the antenna device according to claim 11, wherein the phase dielectric is arranged corresponding to the first branching point, the second branching point, and the third branching point.
  13. When setting the target phase values of the aforementioned radiating element to the maximum value +2.5X and the minimum value -2.5X, A phase shifter for an antenna device according to claim 11, wherein the impedance matching steps of the phase dielectrics arranged at the first branching point are processed and formed such that the phase differences between each of the radiating elements are the same, with respect to the upper transmission line and the lower transmission line, respectively, are +1.5X and -1.5X.
  14. When setting the target phase values of the aforementioned radiating element to the maximum value +2.5X and the minimum value -2.5X, A phase shifter for an antenna device according to claim 11, wherein the phase dielectrics arranged at the second branch point and the third branch point have the same phase difference between each of the radiating elements, and the impedance matching steps are machined and formed such that, except for the middle branch transmission line among the three branch transmission lines, the phase difference is +1X with respect to the upper branch transmission line and -1X with respect to the lower branch transmission line.

Description

This invention relates to a phase shifter of an antenna apparatus, and more particularly, to a phase shifter of an antenna apparatus that is configured to transition the phase value by changing the dielectric constant of a dielectric material without changing the physical length of the transmission line provided for feeding power to the radiating element. Generally, in wireless communication networks such as mobile communication networks and wireless subscriber lines, base stations are installed between the switching center and the subscriber terminal, and wireless signals are exchanged between the base station and the subscriber terminal. The antenna equipment installed at base stations is designed to have a constant vertical/horizontal beam pattern and beam directivity characteristics, taking into account the spatial distribution of subscribers. Recently, existing mobile communication carriers have been diversifying their services by acquiring business rights for frequency bands other than those already allocated to them. This change in the radio wave environment necessitates changes in beam characteristics, such as beam width and beam tilt, of antennas (radiating elements). In other words, when the beam width of a communication or broadcasting antenna is fixed, steering or tilting the beam requires a person to climb the tower and manually control the antenna. Therefore, recently, structures have been applied that accommodate changes in beam characteristics, such as beam steering and beam tilting, through phase transitions caused by changes in the physical length of the transmission line relative to the radiating element. However, while phase shifters are necessary to accommodate changes in the physical length of transmission lines, the relatively large space occupied by these shifters hinders product slimming and also contributes to increased manufacturing costs due to the complexity of the transmission lines. This is a perspective view showing the external appearance of an antenna device equipped with a phase shifter according to one embodiment of the present invention.This is a front-side exploded perspective view of the configuration shown in Figure 1, with the antenna housing section separated.This is a rear-side exploded perspective view of the configuration shown in Figure 1, with the antenna housing section separated.This is a perspective view showing the external appearance of the configuration in Figure 1(a) with the radome panel removed.This is a perspective view showing the external appearance of the configuration in Figure 1(b) with the rear panel removed.This is a perspective view showing an antenna board assembly equipped with a phase shifter according to one embodiment of the present invention.This is an exploded perspective view showing the configuration of Figure 5 with the low-band and mid-band elements separated.This is an exploded perspective view showing the configuration of Figure 5 with only the low-band element separated.Figure 5 is an exploded perspective view showing the overlapping placement of the low-band and mid-band elements in the configuration.Figure 5 is an exploded perspective view showing the front portion of the reflecting panel where the low-band element and the mid-band element are provided.Figure 5 shows an exploded perspective view of the rear portion of the reflecting panel, which is equipped with the low-band element and the mid-band element.This is a front perspective view showing the low-band phase shifter and mid-band phase shifter provided on the reflecting panel.This is a rear perspective view showing the low-band phase shifter and mid-band phase shifter provided on the reflecting panel.Figure 10A shows exploded perspective views and their respective enlarged sections. Figure 10B shows exploded perspective views and their respective enlarged sections.This is a front view of Figures 10A and 10B.This is a rear view of Figures 10A and 10B.A cross-sectional perspective view and a partially enlarged view of the dielectric panel for phase adjustment, which is part of the configuration of a phase shifter in an antenna device according to one embodiment of the present invention.This is a partially enlarged perspective view illustrating the operation of a phase shifter in an antenna device according to one embodiment of the present invention.This is a cross-sectional view along the line B-B in Figure 14.This is a schematic diagram illustrating the function of the phase-adjusting dielectric panel in the configuration of a phase shifter in an antenna device according to one embodiment of the present invention.This is a partial front view (a) of the first transmission line and a graph (b) showing an ideal phase difference diagram, illustrating how the phase difference is achieved by adjusting the position and depth of the impedance matching step of the phase dielectric in the configuration of a phase shifter of an antenna device according to one embodiment of the prese