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WO-2026090856-A1 - ARRAY ANTENNA AND ANTENNA SYSTEM

WO2026090856A1WO 2026090856 A1WO2026090856 A1WO 2026090856A1WO-2026090856-A1

Abstract

An array antenna (10), the array antenna (10) comprising a first radiation layer (11), a first ground layer (12), a power division layer (13), and a coupling layer (14). The first radiation layer (11) comprises first radiation units (111); the power division layer (13) comprises a power division network (131) comprising a power division main port (132) and power division ports (133); and the coupling layer (14) comprises coupling units (141), and each coupling unit comprises a first transmission line (142) and a second transmission line (143) which are coupled. In embodiments of the present disclosure, the coupling units (141) and the power division network (131) are arranged in layers, and the structure of the coupling units (141) is simplified, so as to reduce the mutual influence of the coupling units (141) and the power division network (131). Moreover, the size of the array antenna (10) is reduced to achieve miniaturization, high integration level, and simple structure of the array antenna (10).

Inventors

  • MA, Wenxue
  • SONG, Shuai
  • MIAO, Long
  • DING, YING
  • JIN, YUNNAN
  • WEI, Meng
  • JIANG, RUDAN
  • WANG, DONGYAO
  • ZHAO, Yunzhang
  • SU, Xueyan
  • ZHAO, WEI
  • LI, Yuanfu

Assignees

  • 京东方科技集团股份有限公司
  • 北京京东方技术开发有限公司

Dates

Publication Date
20260507
Application Date
20241029

Claims (15)

  1. An array antenna, comprising: First substrate; The first radiating layer is located on one side of the first substrate and includes a plurality of first radiating units arranged in an array. The first ground layer is located on the side of the first substrate away from the first radiating layer; The second substrate is located on the side of the first ground layer that is away from the first substrate; The power distribution layer is located on the side of the second substrate away from the first substrate and includes a power distribution network. The power distribution network has a power distribution main port and multiple power distribution ports, and the multiple power distribution ports correspond one-to-one with multiple first radiating units. The coupling layer is located on a different metal layer from the power distribution layer and includes multiple coupling units corresponding to the multiple power distribution ports. Each coupling unit includes a first transmission line and a second transmission line coupled together. The feed end of the first transmission line is connected to a feed post. The feed output end of the first transmission line is connected to the corresponding first radiation unit. The detection end of the second transmission line is connected to the corresponding power distribution port. The isolation end of the second transmission line is connected to the first ground layer.
  2. The array antenna as claimed in claim 1, wherein the array antenna further includes a second radiating layer, the second radiating layer being located on the side of the first radiating layer away from the power layer, and being spaced apart from the first radiating layer; The second radiation layer includes a plurality of second radiation units, each of which corresponds one-to-one with a plurality of first radiation units, and the line connecting the center point of each second radiation unit to the center point of the corresponding first radiation unit is perpendicular to the plane in which the first ground layer is located.
  3. The array antenna as described in claim 2, wherein the second radiating element is a rectangular patch or a circular patch.
  4. The array antenna as claimed in claim 1, wherein the coupling layer and the first radiating layer are located in the same metal layer.
  5. The array antenna as claimed in claim 1, wherein the coupling layer is located on the side of the power layer opposite to the first ground layer; The array antenna further includes a second ground layer, which is located between the coupling layer and the power layer.
  6. The array antenna as claimed in claim 5, wherein the array antenna further comprises a third substrate and The fourth substrate, wherein the second ground layer includes a third ground sublayer and a fourth ground sublayer; The third substrate, the third grounding sublayer, the fourth grounding sublayer, and the fourth substrate are stacked sequentially in the direction of the power layer toward the coupling layer, and the third grounding sublayer and the fourth grounding sublayer are attached together.
  7. The array antenna as claimed in claim 1, wherein the coupling layer is located between the first ground layer and the power layer, and is located on the side of the second substrate opposite to the first ground layer; The array antenna further includes a third ground layer, which is located between the coupling layer and the power layer.
  8. The array antenna as claimed in claim 7, wherein the array antenna includes a fifth substrate and a sixth substrate, and the third ground layer includes a fifth ground sublayer and a sixth ground sublayer; The fifth substrate, the fifth grounding sublayer, the sixth grounding sublayer, and the sixth substrate are stacked sequentially in the direction of the coupling layer toward the power layer, and the fifth grounding sublayer and the sixth grounding sublayer are attached together.
  9. The array antenna as described in any one of claims 1-8, wherein the first ground layer comprises a first ground sublayer and a second ground sublayer; The first grounding layer is located on the side of the first radiating layer away from the first substrate, and the second grounding layer is located on the side of the second substrate away from the power layer. The first grounding layer and the second grounding layer are attached together.
  10. The array antenna of claim 9, wherein the array antenna further includes an adhesive layer, the adhesive layer being bonded to and conducting the first ground sub-layer and the second ground sub-layer.
  11. The array antenna as described in any one of claims 1-8, wherein the first transmission line and the second transmission line of the coupling unit are both U-shaped, and the opening sides of the first transmission line and the second transmission line are opposite to each other.
  12. The array antenna as claimed in claim 11, wherein the isolation end of the second transmission line is connected to a first isolation resistor.
  13. The array antenna as described in any one of claims 1-8, wherein the first radiating element comprises a radiating patch and a microstrip transmission line; The edge of the radiating patch has a notch, and the first end of the microstrip transmission line is connected to the radiating patch at the notch, and the second end is connected to the feed end of the first transmission line.
  14. The array antenna as described in any one of claims 1-8, wherein the plurality of power divider ports are connected to the... The transmission lines of the power distribution port are all of equal length.
  15. An antenna system comprising the array antenna as described in any one of claims 1-14.

Description

Array antennas and antenna systems Technical Field This disclosure relates to the field of communication technology, and more specifically, to an array antenna and an antenna system. Background Technology Antennas, as devices that convert guided waves to free-space transmitted waves, play an irreplaceable role in wireless communication. As an essential component of any communication system, their performance directly impacts the overall performance of the entire system. In array antennas, with prolonged use, the transmission channels of each antenna experience amplitude and phase changes due to variations in the surrounding environment and the aging of components. This leads to deviations from the initially set amplitude and phase values, ultimately resulting in deteriorated radiation performance. Therefore, introducing real-time detection functionality into array antennas to identify amplitude and phase errors between feed points is crucial. It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention The purpose of this disclosure is to provide an array antenna and an antenna system. According to one aspect of this disclosure, an array antenna is provided, comprising: First substrate; The first radiating layer is located on one side of the first substrate and includes a plurality of first radiating units arranged in an array. The first ground layer is located on the side of the first substrate away from the first radiating layer; The second substrate is located on the side of the first ground layer that is away from the first substrate; The power distribution layer is located on the side of the second substrate away from the first substrate and includes a power distribution network. The power distribution network has a power distribution main port and multiple power distribution ports, and the multiple power distribution ports correspond one-to-one with multiple first radiating units. The coupling layer, located on a different metal layer from the power distribution layer, includes multiple coupling units corresponding one-to-one with the power distribution ports. Each coupling unit includes a first transmission line and a second transmission line coupled together. The feed end of the first transmission line is connected to a feed post, the output end of the first transmission line is connected to a corresponding first radiation unit, and the detection end of the second transmission line is connected to a corresponding power distribution port. The isolation end of the second transmission line is connected to the first ground layer. According to any of the array antennas described in this disclosure, the array antenna further includes a second radiating layer, the second radiating layer being located on the side of the first radiating layer away from the power layer, and being spaced apart from the first radiating layer; The second radiation layer includes a plurality of second radiation units, each of which corresponds one-to-one with a plurality of first radiation units, and the line connecting the center point of each second radiation unit to the center point of the corresponding first radiation unit is perpendicular to the plane in which the first ground layer is located. According to any of the array antennas described in this disclosure, the second radiating element is a rectangular patch or a circular patch. According to any of the array antennas described in this disclosure, the coupling layer and the first radiating layer are located in the same metal layer. According to any of the array antennas described in this disclosure, the coupling layer is located on the side of the power layer opposite to the first ground layer; The array antenna further includes a second ground layer, which is located between the coupling layer and the power layer. According to any of the array antennas described in this disclosure, the array antenna further includes a third substrate and a fourth substrate, and the second ground layer includes a third ground sublayer and a fourth ground sublayer; The third substrate, the third grounding sublayer, the fourth grounding sublayer, and the fourth substrate are stacked sequentially in the direction of the power layer toward the coupling layer, and the third grounding sublayer and the fourth grounding sublayer are attached together. According to any of the array antennas described in this disclosure, the coupling layer is located between the first ground layer and the power layer, and is located on the side of the second substrate opposite to the first ground layer; The array antenna further includes a third ground layer, which is located between the coupling layer and the power layer. According to any of the array antennas described in this discl