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CN-122026108-A - Compact medium resonator decoupling antenna

CN122026108ACN 122026108 ACN122026108 ACN 122026108ACN-122026108-A

Abstract

The invention discloses a decoupling antenna of a compact dielectric resonator, which comprises a top layer resonance structure, a double-layer dielectric substrate, a metal stratum and a bottom layer metal feeder line. The top layer resonance structure comprises a plurality of rectangular dielectric resonators arranged in a linear array, wherein the upper side and the lower side of each rectangular dielectric resonator are respectively provided with a flat bottom U-shaped dielectric block with opposite openings, and the short sides of the upper side and the lower side of each rectangular dielectric resonator are embedded into the corresponding flat bottom U-shaped dielectric block. According to the invention, through the interference and resonance of the U-shaped dielectric block, the internal electric field of the antenna unit is changed, meanwhile, a part of leaked energy is intercepted and captured into the U-shaped structure, so that coupling to adjacent antenna units is reduced, the strong coupling effect is weakened, the antenna has the effects of impedance decoupling and direction graphic coupling, and the structure is compact and the efficiency is higher.

Inventors

  • ZHANG LINGYAN
  • XIANG WANG
  • FAN MENGYAN
  • LI JUNXIAN
  • XU KAI
  • SHI JIN
  • ZHANG WEI

Assignees

  • 南通大学

Dates

Publication Date
20260512
Application Date
20260319

Claims (9)

  1. 1. A compact dielectric resonator decoupling antenna is characterized by comprising a top layer resonance structure, double-layer dielectric substrates, metal strata and bottom layer metal feeder lines, wherein the top layer resonance structure comprises a plurality of rectangular dielectric resonators which are arranged in a linear array, a flat bottom U-shaped dielectric block with opposite openings is arranged on the upper side and the lower side of each rectangular dielectric resonator, short sides of the upper side and the lower side of each rectangular dielectric resonator are embedded into the corresponding flat bottom U-shaped dielectric block, the upper side and the lower side of each rectangular dielectric resonator are symmetrical with each other about the horizontal central line of each rectangular dielectric resonator, the metal strata is arranged between the two layers of dielectric substrates, rectangular grooves corresponding to the rectangular dielectric resonators are formed in the metal strata, and the bottom layer metal feeder lines and the rectangular grooves are arranged in a one-to-one orthogonal mode.
  2. 2. The decoupling antenna of claim 1, wherein the rectangular dielectric resonator has dimensions of about 0.31λ 0 ~0.32λ 0 for the length of the long side and about 0.16λ 0 ~0.17λ 0 for the length of the short side and about 0.050 λ 0 ~0.051λ 0 ,λ 0 for the free space wavelength for the center frequency.
  3. 3. The compact dielectric resonator decoupling antenna of claim 2, wherein the center-to-center distance between two adjacent rectangular dielectric resonators is 0.35 λ 0 ~0.36λ 0 .
  4. 4. The compact dielectric resonator decoupling antenna of claim 2, wherein the flat bottom U-shaped dielectric block has a height of 0.050 λ 0 ~0.051λ 0 , a side arm width of 0.032 λ 0 ~0.033λ 0 , a side arm length of 0.098λ 0 ~0.099λ 0 , and a bottom edge length of 0.032 λ 0 ~0.033λ 0 .
  5. 5. The compact dielectric resonator decoupling antenna of claim 4, wherein the distance between the bottom edges of two flat bottom U-shaped dielectric blocks that are vertically symmetric is 0.39λ 0 ~0.40λ 0 .
  6. 6. The compact dielectric resonator decoupling antenna of claim 4, wherein the outer sides of two flat bottom U-shaped dielectric blocks adjacent in the linear direction are spaced apart by 0.089λ 0 ~0.090λ 0 .
  7. 7. The compact dielectric resonator decoupling antenna of claim 4, wherein said rectangular slot has a length of 0.098λ 0 ~0.099λ 0 and a width of 0.032 λ 0 ~0.033λ 0 .
  8. 8. The compact dielectric resonator decoupling antenna of claim 4, wherein the upper dielectric substrate has a thickness of 0.014 λ 0 ~0.015λ 0 and the lower dielectric substrate has a thickness of 0.013 λ 0 ~0.014λ 0 .
  9. 9. The compact dielectric resonator decoupling antenna according to any one of claims 1 to 8, wherein the inner electric field distribution of the antenna unit is disturbed by using the resonance characteristics of the flat-bottom U-shaped dielectric block by arranging the flat-bottom U-shaped dielectric block on the upper and lower sides of the rectangular dielectric resonator, so that the inner electric field of the antenna unit of the rectangular dielectric resonator is changed, and the interference of the flat-bottom U-shaped dielectric block captures part of the leaked energy originally flowing to the adjacent antenna unit into the flat-bottom U-shaped dielectric block, so that the energy coupled into the adjacent antenna unit is reduced, thereby weakening the strong coupling effect and realizing the outward electromagnetic coupling suppression of the single unit.

Description

Compact medium resonator decoupling antenna Technical Field The invention relates to the field of microwave communication, in particular to a dielectric resonator decoupling antenna. Background Compared with the traditional metal patch antenna, the dielectric resonator antenna has the advantages of low dielectric loss, high Q value, large power capacity, high design freedom degree and the like, and can effectively reduce energy loss in the signal transmission process. In practical application, in order to improve the channel capacity, transmission reliability and frequency coverage of a communication system, a plurality of dielectric resonator antennas are often assembled, but in the process of array, electromagnetic mutual coupling phenomenon is very easy to occur between antenna units, so that problems of impedance matching deterioration, radiation pattern distortion, efficiency reduction and the like are caused, and the overall working performance of the antenna array is severely restricted. The method mainly aims at electromagnetic mutual coupling inhibition among dielectric antenna units, and mainly comprises the following main solutions that firstly, the electromagnetic coupling paths among the antenna units are blocked by optimizing the space arrangement form of the antenna array, such as increasing the unit spacing, adopting different-surface or staggered arrangement and the like, the decoupling effect can be realized to a certain extent, but the space occupation rate can be greatly increased, meanwhile, the assembly and debugging difficulty of a system can be improved by a complex arrangement mode, the decoupling is realized by optimizing the structural design of an antenna body, the electromagnetic interference among the units is inhibited by utilizing the electromagnetic characteristics of a dielectric material and the resonance coupling principle of an antenna structure, the method does not need to add an additional external structure, but the system volume is not increased, but the electromagnetic interference among the units is relatively difficult to realize, and thirdly, the external structure, such as adding an external dielectric block, a metal partition plate, a metal patch and the like, is increased, and the electromagnetic interference among the antenna units is inhibited by utilizing the electromagnetic shielding and coupling counteraction effect of the structures, the decoupling effect is direct, but the additional external structure can increase the volume and the structural complexity of the system, and the additional external structure can possibly introduce additional loss to influence the radiation performance of the antenna. The compact layout of the antenna units can aggravate near field coupling among the units, reduce port isolation, and difficult to realize good port decoupling, and when the port decoupling is adopted, the antenna radiation pattern is easily distorted, and the radiation performance is deteriorated. Therefore, there is a need to develop a dielectric resonator antenna that can have both port decoupling and pattern recovery effects at a compact spacing. Disclosure of Invention Aiming at the prior art, the invention provides a compact dielectric resonator decoupling antenna with a pattern recovery characteristic, solves the problems of mutual coupling, low efficiency and pattern distortion among dielectric antenna units, and realizes the dielectric resonator decoupling antenna with port decoupling and pattern recovery effects under tight arrangement. The technical scheme includes that the decoupling antenna of the compact dielectric resonator comprises a top layer resonance structure, double-layer dielectric substrates, metal strata and bottom metal feeder lines, wherein the top layer resonance structure comprises a plurality of rectangular dielectric resonators which are arranged in a linear array, a flat-bottom U-shaped dielectric block with opposite openings is arranged on the upper side and the lower side of each rectangular dielectric resonator, short sides of the upper side and the lower side of each rectangular dielectric resonator are embedded into the corresponding flat-bottom U-shaped dielectric block, the upper side and the lower side of each rectangular dielectric resonator are symmetrical with each other about the horizontal central line of each rectangular dielectric resonator, the metal strata is arranged between the two layers of dielectric substrates, rectangular grooves corresponding to the rectangular dielectric resonators are formed in the metal strata, and the bottom metal feeder lines and the rectangular grooves are arranged in one-to-one orthorhombic mode. Further, the rectangular dielectric resonator has a length of 0.31λ 0~0.32λ0 on the left and right long sides, a length of 0.16λ 0~0.17λ0 on the upper and lower short sides, and a height of 0.050λ 0~0.051λ0,λ0 as a free space wavelength corresponding to the center frequency. Further, the