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CN-122000663-A - Dual-frequency base station antenna

CN122000663ACN 122000663 ACN122000663 ACN 122000663ACN-122000663-A

Abstract

The embodiment of the application provides a dual-frequency base station antenna, which belongs to the technical field of antenna equipment, and comprises a grounding plate, wherein two dielectric substrates are laminated on the grounding plate, each dielectric substrate is correspondingly provided with a radiation unit, the radiation signal frequency ranges of the two radiation units are different, each radiation unit comprises a radiation patch and a metal through hole array, the radiation patch is a sector patch, the metal through hole array is arranged around the arc edge of the radiation patch, the metal through hole array, the grounding plate, the dielectric substrates and the radiation patch form a substrate integrated waveguide resonant cavity together, and the substrate integrated waveguide resonant cavity is configured to be excited by coupling after being excited by the outside so as to radiate signals of a preset frequency range through the radiation patch. The dual-frequency base station antenna provided by the embodiment of the application has excellent different-frequency isolation performance and can realize the effects of bandwidth expansion and radiation optimization.

Inventors

  • FU XIAODONG
  • WANG JIANPENG
  • SHEN YICHUN
  • LAN YANRUI
  • FANG HONGLIAN
  • WANG XUEREN
  • GU XIAOFENG
  • ZHENG CHAOYI
  • WU HAILONG

Assignees

  • 中天通信技术有限公司
  • 中天宽带技术有限公司
  • 江苏中天科技股份有限公司

Dates

Publication Date
20260508
Application Date
20260410

Claims (10)

  1. 1. A dual-frequency base station antenna, comprising: The device comprises a grounding plate (100), wherein two dielectric substrates (200) are stacked on the grounding plate (100), each dielectric substrate (200) is correspondingly provided with a radiation unit (300), and the radiation signal frequency bands of the two radiation units (300) are different; The radiating unit (300) comprises a radiating patch and a metal through hole array, wherein the radiating patch is arranged on the dielectric substrate (200), the radiating patch is a sector patch, the metal through hole array is arranged around the arc edge of the radiating patch, and the metal through hole array, the grounding plate (100), the dielectric substrate (200) and the radiating patch jointly form a substrate integrated waveguide resonant cavity; the substrate integrated waveguide resonant cavity is configured to couple and excite the radiation patch through the metal through hole array after being excited by the outside, so that the radiation patch radiates signals of a preset frequency band.
  2. 2. The dual-band base station antenna of claim 1, wherein the two dielectric substrates (200) comprise a first sub-dielectric substrate (210) disposed on the ground plane (100), and a second sub-dielectric substrate (220) disposed on the first sub-dielectric substrate (210); The two radiating elements (300) comprise a first sub-radiating element (310) arranged on the first sub-dielectric substrate (210) and a second sub-radiating element (320) arranged on the second sub-dielectric substrate (220); The first sub-radiating unit (310) comprises a first radiating patch (311) and a first metal through hole array (312), the second sub-radiating unit (320) comprises a second radiating patch (321) and a second metal through hole array (322), the first radiating patch (311), the ground plate (100), the first sub-dielectric substrate (210) and the first metal through hole array (312) form a first substrate integrated waveguide resonant cavity, and the second radiating patch (321), the first radiating patch (311), the second sub-dielectric substrate (220) and the second metal through hole array (322) form a second substrate integrated waveguide resonant cavity; The orthographic projection of the first radiation patch (311) on the ground plate (100) is larger than the orthographic projection of the second radiation patch (321) on the ground plate (100).
  3. 3. The dual-band base station antenna according to claim 2, further comprising a feeding probe (400), the feeding probe (400) sequentially penetrating through the ground plate (100), the first sub-dielectric substrate (210) and the second sub-dielectric substrate (220), the second radiating patch (321) being provided with a feeding point (3211), the feeding probe (400) exciting the second radiating patch (321) through the feeding point (3211).
  4. 4. A dual-frequency base station antenna according to claim 3, characterized in that the first radiating patch (311) is provided with a first avoidance hole (3111) for penetrating the feed probe (400), and the ground plate (100) is provided with a second avoidance hole (110) for penetrating the feed probe (400); the first avoidance hole (3111), the second avoidance hole (110) and the feed probe (400) are coaxially arranged, the feed probe (400) being further configured to, upon excitation of the second radiation patch (321), electromagnetically couple to excite the first radiation patch (311).
  5. 5. The dual-band base station antenna according to claim 4, wherein the first radiating patch (311) is provided with an annular slot (3112), the annular slot (3112) is disposed around the first dodging hole (3111), and the annular slot (3112) is used for adjusting coupling capacitance of the first sub-radiating element (310).
  6. 6. A dual-frequency base station antenna according to claim 3, characterized in that the feeding point (3211) is located at the intersection of the angular bisector (3212) of the second radiating patch (321) and the electrical wall location of the TM02 resonance mode of the second substrate integrated waveguide resonator; The array direction of the second array of metallic vias (322) is disposed along an electrical wall location of a target resonant mode of the second radiating patch (321) and is configured to suppress at least one non-target resonant mode of the second radiating patch (321).
  7. 7. The dual-frequency base station antenna of claim 6, wherein the first radiating patch (311) coincides with an apex of the first substrate-integrated waveguide resonator and the second radiating patch (321) coincides with an apex of the second substrate-integrated waveguide resonator.
  8. 8. The dual-frequency base station antenna according to any of the claims 2 to 7, characterized in that the angle of the first radiating patch (311) and the second radiating patch (321) is a right angle or an acute angle.
  9. 9. The dual-band base station antenna of claim 8, wherein the ground plane (100), the first sub-dielectric substrate (210) and the second sub-dielectric substrate (220) are rectangular plates, and the first radiating patch (311) and the second radiating patch (321) are right angle sector patches.
  10. 10. The dual-band base station antenna according to any of claims 1 to 6, characterized in that the front projections of two dielectric substrates (200) on the ground plate (100) coincide, and that the front projection of the dielectric substrates (200) on the ground plate (100) coincides with the contour of the ground plate (100).

Description

Dual-frequency base station antenna Technical Field The present application relates to a communication antenna technology, and in particular, to a dual-frequency base station antenna. Background Along with the development of mobile communication technology to high frequency band and multi-frequency band, the communication antenna needs to support the signal transmission and reception of two or more independent frequency bands simultaneously so as to meet the requirement of high-speed data transmission. In the related art, a dual-band base station antenna utilizes different resonance modes of a single radiation patch to realize dual-frequency operation, and the radiation patch simultaneously works in different resonance modes such as a fundamental mode, a higher order mode and the like to realize dual-frequency functions. However, because the fundamental mode and the higher order mode share the same radiation patch, parasitic resonance is easy to excite when the dual-band base station antenna radiates, so that the different-frequency isolation performance is insufficient, and the signal interference of adjacent frequency bands cannot be effectively restrained. Disclosure of Invention The embodiment of the application provides a dual-frequency base station antenna, which is used for solving the technical problem of insufficient different-frequency isolation performance of the dual-frequency base station antenna in the related technology. The dual-frequency base station antenna provided by the embodiment of the application comprises: the device comprises a grounding plate, wherein two dielectric substrates are stacked on the grounding plate, each dielectric substrate is correspondingly provided with a radiation unit, and the radiation signal frequency bands of the two radiation units are different; The radiating unit comprises a radiating patch and a metal through hole array, wherein the radiating patch is arranged on the dielectric substrate, the radiating patch is a sector patch, the metal through hole array is arranged around the arc edge of the radiating patch, and the metal through hole array, the grounding plate, the dielectric substrate and the radiating patch jointly form a substrate integrated waveguide resonant cavity; the substrate integrated waveguide resonant cavity is configured to couple and excite the radiation patch through the metal through hole array after being excited by the outside, so that the radiation patch radiates signals of a preset frequency band. In some possible embodiments, the two dielectric substrates include a first sub-dielectric substrate disposed on the ground plate, and a second sub-dielectric substrate disposed on the first sub-dielectric substrate; the two radiating units comprise a first sub-radiating unit arranged on the first sub-dielectric substrate and a second sub-radiating unit arranged on the second sub-dielectric substrate; The first sub-radiating unit comprises a first radiating patch and a first metal through hole array, the second sub-radiating unit comprises a second radiating patch and a second metal through hole array, the first radiating patch, the grounding plate, the first sub-dielectric substrate and the first metal through hole array form a first substrate integrated waveguide resonant cavity, and the second radiating patch, the first radiating patch, the second sub-dielectric substrate and the second metal through hole array form a second substrate integrated waveguide resonant cavity; The orthographic projection of the first radiation patch on the ground plate is greater than the orthographic projection of the second radiation patch on the ground plate. In some possible embodiments, the antenna further comprises a feed probe, wherein the feed probe sequentially penetrates through the grounding plate, the first sub-medium substrate and the second sub-medium substrate, the second radiation patch is provided with a feed point, and the feed probe excites the second radiation patch through the feed point. In some possible embodiments, the first radiation patch is provided with a first avoidance hole for penetrating the feed probe, and the ground plate is provided with a second avoidance hole for penetrating the feed probe; The first avoidance hole, the second avoidance hole, and the feed probe are coaxially arranged, and the feed probe is further configured to electromagnetically couple to excite the first radiation patch when exciting the second radiation patch. In some possible embodiments, an annular gap is disposed on the first radiating patch, and the annular gap is disposed around the first avoidance hole, and is used for adjusting the coupling capacitance of the first sub-radiating element. In some possible implementations, the feed point is located at an intersection of an angular bisector of the second radiating patch and an electrical wall location of a TM02 resonant mode of the second substrate integrated waveguide resonant cavity; the array