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CN-122026134-A - Phased array antenna of Ka wave band receiving frequency band

CN122026134ACN 122026134 ACN122026134 ACN 122026134ACN-122026134-A

Abstract

The application discloses a phased array antenna of Ka wave band receiving frequency band, which relates to the technical field of antennas, and comprises: the antenna unit comprises a parasitic patch layer, a driving patch layer, a feed layer, a metal grounding layer and a bridge structure, wherein the parasitic patch layer, the driving patch layer, the feed layer and the metal grounding layer are sequentially stacked along the thickness direction of the antenna unit, the bridge structure is arranged in the metal grounding layer, the antenna unit is provided with an antenna feed hole, the antenna feed hole is connected with the feed layer and the bridge structure to form a signal feed path, and the metal grounding layer is arranged at intervals with the hole wall of the antenna feed hole. According to the phased array antenna, the antenna unit can completely cover the Ka-band receiving frequency band, the radiation efficiency of the phased array antenna is improved, the wide-angle scanning performance of the phased array antenna is improved, and the phased array antenna of the Ka-band receiving frequency band is suitable for a satellite communication system.

Inventors

  • HE WEIYU
  • ZHANG CE
  • WEN JIAHAO

Assignees

  • 上海铂砼科技有限公司

Dates

Publication Date
20260512
Application Date
20260320

Claims (10)

  1. 1. A phased array antenna for Ka-band receiving frequency band is characterized in that, A substrate (10); The antenna unit (20) comprises a parasitic patch layer (21), a driving patch layer (22), a feed layer (23), a metal grounding layer (24) and a bridge structure (25), wherein the parasitic patch layer (21), the driving patch layer (22), the feed layer (23) and the metal grounding layer (24) are sequentially stacked along the thickness direction of the antenna unit (20), the bridge structure (25) is arranged in the metal grounding layer (24), the antenna unit (20) is provided with an antenna feed hole (26), the antenna feed hole (26) extends along the thickness direction of the antenna unit (20), the antenna feed hole (26) is connected with the feed layer (23) and the bridge structure (25) to form a signal feed path, and the metal grounding layer (24) is spaced apart from the wall of the antenna feed hole (26).
  2. 2. The phased array antenna of the Ka-band receiving band according to claim 1, wherein the phased array antenna (1) further comprises a metal isolation strip (30), the metal isolation strip (30) is arranged on the substrate (10), the metal isolation strip (30) separates the substrate (10) into a plurality of mounting areas (16), the plurality of mounting areas (16) are arranged in an array, and the plurality of antenna units (20) are respectively arranged in the plurality of mounting areas (16).
  3. 3. Phased array antenna of Ka band receive frequency band according to claim 1, characterized in that the feed layer (23) comprises a first feed stub (231) and a second feed stub (232), the first feed stub (231) and the second feed stub (232) being symmetrically arranged about an axis of symmetry, which is perpendicular to and intersects the central axis of the antenna unit (20), the central axis of the first feed stub (231) and the central axis of the second feed stub (232) forming an angle of 90 ° with the shortest line of the central axis of the antenna unit (20).
  4. 4. A phased array antenna in a Ka band receive band according to claim 3, wherein the parasitic patch layer (21) comprises a main body layer (211), a plurality of bandwidth adjustment notches (2111) are formed at edges of the main body layer (211), and the plurality of bandwidth adjustment notches (2111) are sequentially arranged along a circumferential direction of the main body layer (211).
  5. 5. The Ka-band receive band phased array antenna of claim 4 wherein the number of bandwidth adjustment notches (2111) is even and a plurality of said bandwidth adjustment notches (2111) are symmetrical about said axis of symmetry.
  6. 6. The phased array antenna of the Ka band receive band of claim 4, wherein said parasitic patch layer (21) further comprises a plurality of bandwidth adjustment bands (212), a plurality of said bandwidth adjustment bands (212) being disposed circumferentially around said body layer (211) along said body layer (211).
  7. 7. The Ka-band receive band phased array antenna of claim 6, wherein the number of bandwidth adjustment bands (212) is even, and a plurality of the bandwidth adjustment bands (212) are symmetrical about the symmetry axis.
  8. 8. Phased array antenna of Ka-band receive frequency band according to any one of claims 3-7, characterized in that the side of the metal ground layer (24) facing away from the feed layer (23) is formed with two feed ports (241), both feed ports (241) being connected to the bridge structure (25), both feed ports (241) having an excited operating state and a non-excited operating state, the radiation polarization mode of the antenna unit (20) being changed by switching the operating states of both feed ports (241).
  9. 9. The Ka-band receive band phased array antenna of claim 8, wherein the bridge structure (25) comprises a first input port (251), a second input port (252), a first output port (253) and a second output port (254), the first input port (251) and the second input port (252) being connected to two of the feed ports (241), respectively, the first output port (253) and the second output port (254) being connected to the first feed branch (231) and the second feed branch (232), respectively.
  10. 10. The Ka-band receive band phased array antenna of claim 8, wherein the metal ground layer (24) comprises a first sub-ground layer (242) and a second sub-ground layer (243) connected to each other, the first sub-ground layer (242) and the second sub-ground layer (243) are arranged along a thickness direction of the antenna unit (20), the bridge structure (25) is disposed between the first sub-ground layer (242) and the second sub-ground layer (243), and the feed port (241) is disposed in the first sub-ground layer (242).

Description

Phased array antenna of Ka wave band receiving frequency band Technical Field The invention relates to the technical field of antennas, in particular to a phased array antenna of a Ka-band receiving frequency band. Background In the related art, the existing Ka-band phased array antenna has the problem of narrow working bandwidth, is difficult to completely cover the receiving frequency band of the Ka-band, and also has the defects of poor wide-angle scanning performance, low radiation efficiency, large integration difficulty and the like, so that the existing Ka-band phased array antenna is difficult to meet the actual application requirements of a satellite communication system. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a phased array antenna with a Ka-band receiving band, which is beneficial to enabling an antenna unit to completely cover the Ka-band receiving band, improving radiation efficiency of the phased array antenna, improving wide-angle scanning performance of the phased array antenna, and enabling the phased array antenna with the Ka-band receiving band to be suitable for a satellite communication system. The phased array antenna for the Ka band receiving frequency band comprises a substrate and a plurality of antenna units, wherein the antenna units are arranged on the substrate and are arranged in an array mode, the antenna units comprise a parasitic patch layer, a driving patch layer, a feed layer, a metal grounding layer and a bridge structure, the parasitic patch layer, the driving patch layer, the feed layer and the metal grounding layer are sequentially stacked along the thickness direction of the antenna units, the bridge structure is arranged in the metal grounding layer, the antenna units are provided with antenna feed holes, the antenna feed holes extend along the thickness direction of the antenna units, the antenna feed holes are connected with the feed layer and the bridge structure to form a signal feed path, and the metal grounding layer is arranged at intervals with the hole wall of the antenna feed hole. According to the phased array antenna of the Ka band receiving frequency band, the parasitic patch layer, the driving patch layer, the feed layer and the metal grounding layer are sequentially stacked along the thickness direction of the antenna unit, the bridge structure is arranged in the metal grounding layer, and the antenna feed hole extending along the thickness direction of the antenna unit is utilized to transmit signals, so that the effect of vertical feed is achieved, the signal transmission path is shortened, the energy loss is reduced, the stray radiation of the antenna unit is reduced, the radiation efficiency of the phased array antenna is improved, the wide-angle scanning performance of the phased array antenna is improved, the integration level of the antenna unit is improved, the structural compactness of the phased array antenna is improved, double resonant frequencies are generated, the antenna unit can completely cover the Ka band receiving frequency band, the phased array antenna can work in the Ka band receiving frequency band, and the phased array antenna of the Ka band receiving frequency band is suitable for a satellite communication system. According to some embodiments of the invention, the phased array antenna further comprises a metal isolation belt, wherein the metal isolation belt is arranged on the substrate, the metal isolation belt divides the substrate into a plurality of installation areas, the installation areas are arranged in an array mode, and the antenna units are respectively arranged in the installation areas. According to some embodiments of the invention, the feeding layer comprises a first feeding branch and a second feeding branch, the first feeding branch and the second feeding branch are symmetrically arranged about a symmetry axis, the symmetry axis is perpendicular to and intersects with a central axis of the antenna unit, and a shortest connecting line of the central axes of the first feeding branch and the second feeding branch and the central axis of the antenna unit forms an included angle of 90 degrees. According to some embodiments of the invention, the parasitic patch layer comprises a main body layer, wherein a plurality of bandwidth adjustment notches are formed at the edge of the main body layer, and the bandwidth adjustment notches are sequentially distributed along the circumferential direction of the main body layer. According to some embodiments of the invention, the number of the bandwidth adjusting notches is even, and the plurality of the bandwidth adjusting notches are symmetrical with respect to the symmetry axis. According to some embodiments of the invention, the parasitic patch layer further includes a plurality of bandwidth adjustment straps disposed around the b