Self-decoupling intermediate frequency radiating element and mobile communication antenna

Abstract

This invention provides a self-decoupling intermediate frequency (IF) radiating element and a mobile communication antenna, relating to the technical field of wireless communication. The self-decoupling IF radiating element includes a radiating substrate, a dielectric block, two sets of orthogonally polarized dipoles, and four metal patches. The mobile communication antenna includes the self-decoupling IF radiating element. Each metal patch of the self-decoupling IF radiating element forms a capacitive-inductive resonant circuit with each radiating arm. This resonant circuit can add at least one high-frequency resonant point, ensuring that the electrical performance of the self-decoupling IF radiating element remains unaffected while possessing the characteristic of transmitting high-frequency electromagnetic waves. This allows electromagnetic waves generated by the high-frequency radiating element nested below the self-decoupling IF radiating element to effectively pass through, thereby generating good radiation into space. Specifically applied in mobile communication antennas, this eliminates the need for additional decoupling circuits, does not increase insertion loss, and reduces the design complexity and size of common-aperture antennas.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and more particularly to a self-decoupled intermediate frequency radiating element and a mobile communication antenna. Background Technology

[0002] With the development of multi-band mobile communication antennas, more and more radiating elements need to be integrated into them. Inter-frequency coupling interference is an unavoidable problem in mobile communication antennas. This interference can lead to impedance mismatch, deterioration of isolation, and radiation pattern distortion. To improve the circuit and radiation performance of mobile communication antennas, effective decoupling techniques are required.

[0003] In existing technologies, mobile communication antennas include one or more intermediate frequency (IF) radiating elements and multiple high-frequency radiating elements, with the IF and high-frequency radiating elements arranged alternately on the same ground plane. Mobile communication antennas address inter-frequency coupling interference by incorporating decoupling circuits.

[0004] However, additional decoupling circuitry can increase the design complexity of mobile communication antennas and introduce additional insertion loss. Summary of the Invention

[0005] This invention provides a self-decoupling intermediate frequency radiating element and a mobile communication antenna to solve the problem that additional decoupling circuits would increase the design complexity and introduce additional insertion loss into the mobile communication antenna.

[0006] On one hand, the present invention provides a self-decoupled intermediate frequency radiation unit, including a radiation substrate, a dielectric block, two sets of orthogonally polarized dipoles and four metal patches;

[0007] The dielectric block and the two sets of orthogonally polarized dipoles are respectively disposed on both sides of the radiating substrate. Each set of orthogonally polarized dipoles includes two opposing radiating arms, and the radiating arms are closed outer loop circuits.

[0008] Four metal patches are disposed on the radiating substrate. The four metal patches and two sets of orthogonally polarized dipoles are located on the same side of the radiating substrate. Each radiating arm is equipped with one metal patch. The metal patches are spaced apart inside the radiating arm. Each metal patch and each radiating arm are used to form a capacitor-inductor resonant circuit. The capacitor-inductor resonant circuit is used to add at least one high-frequency resonant point.

[0009] The dielectric block covers the radiating substrate at the corresponding locations of the four radiating arms.

[0010] Optionally, the dielectric block is a dielectric block with a high dielectric constant.

[0011] Optionally, the metal patch is a polygonal metal patch.

[0012] Optionally, it also includes a feeding balun connected to the radiating substrate, the feeding balun being used to feed two sets of orthogonally polarized dipoles.

[0013] Optionally, the power balun includes a base and two coaxial cables, one end of which is connected to the base, and the other end of which is used to power two sets of orthogonally polarized dipoles.

[0014] Optionally, the radiating substrate is provided with a first feeding part and a second feeding part, and the two coaxial cables are electrically connected to the first feeding part and the second feeding part respectively. The first feeding part and the second feeding part are used to feed the two sets of orthogonally polarized dipoles.

[0015] Optionally, the second power supply section has a metallized via, which is used to prevent a short circuit between the first power supply section and the second power supply section.

[0016] Optionally, the base is provided with a first fixing hole for fixing the base to the reflector.

[0017] Optionally, the radiating substrate is provided with a second fixing hole, which is used to fix the self-decoupled intermediate frequency radiating unit on the reflector.

[0018] On the other hand, the present invention provides a mobile communication antenna, including a reflector, a plurality of high-frequency radiating elements and at least one self-decoupling intermediate-frequency radiating element as described above;

[0019] The high-frequency radiation unit and the self-decoupled intermediate-frequency radiation unit are disposed on the reflector plate. The high-frequency radiation unit and the self-decoupled intermediate-frequency radiation unit are nested and staggered in the same location, with the self-decoupled intermediate-frequency radiation unit located above the high-frequency radiation unit.

[0020] This invention provides a self-decoupling intermediate frequency (IF) radiating element and a mobile communication antenna. Each radiating arm of the self-decoupling IF radiating element has a metal patch disposed inside it. These metal patches are spaced apart within the radiating arm, and each metal patch forms a capacitive-inductive resonant circuit with each radiating arm. This resonant circuit adds at least one high-frequency resonant point, ensuring that the electrical performance of the self-decoupling IF radiating element remains unaffected while maintaining the characteristic of transmitting high-frequency electromagnetic waves. This allows electromagnetic waves generated by the high-frequency radiating element nested below the self-decoupling IF radiating element to effectively pass through, thereby generating good radiation into space. Specifically applied in mobile communication antennas, this eliminates the need for additional decoupling circuits, does not increase insertion loss, and reduces the design complexity and size of common-aperture antennas. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a self-decoupling intermediate frequency radiation unit provided in an embodiment of the present invention;

[0023] Figure 2 for Figure 1 A schematic diagram of the self-decoupling intermediate frequency radiation unit from another angle;

[0024] Figure 3 for Figure 1 A schematic diagram of the explosion of the self-decoupling intermediate frequency radiation unit in the image;

[0025] Figure 4 for Figure 1 The S-parameter curves of the self-decoupled intermediate frequency radiating element in the range of 1.71 GHz to 2.17 GHz;

[0026] Figure 5 for Figure 1 The horizontal radiation pattern of the self-decoupled intermediate frequency radiation element in the 1.71 GHz to 2.17 GHz range;

[0027] Figure 6 for Figure 1 Transmission characteristic curves of the self-decoupled intermediate frequency radiating element in the medium at 3.4 GHz to 3.6 GHz;

[0028] Figure 7 The high-frequency radiation unit provided in this embodiment of the invention is applied alone to the horizontal radiation pattern of 3.4 GHz to 3.6 GHz;

[0029] Figure 8 for Figure 1 The horizontal radiation pattern of the high-frequency radiation unit in the 3.4 GHz to 3.6 GHz range when the self-decoupled intermediate frequency radiation unit is located above the high-frequency radiation unit;

[0030] Figure 9 for Figure 1 A comparison of the radiation patterns of a self-decoupled radiation unit located above a high-frequency radiation unit and a single high-frequency radiation unit in the horizontal plane at 3.4 GHz-3.6 GHz;

[0031] Figure 10 This is a schematic diagram of the structure of a mobile communication antenna provided in an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1-Self-decoupling intermediate frequency radiation unit;

[0034] 10-Radiation substrate;

[0035] 101 - First Power Supply Unit;

[0036] 102 - Second power supply unit;

[0037] 1021-metalized through hole;

[0038] 103 - Second fixing hole;

[0039] 20-Dielectric block;

[0040] 201 - Mounting hole;

[0041] 30-Radiation arm;

[0042] 40-Metal patch;

[0043] 50 - Base;

[0044] 501 - First fixing hole;

[0045] 502 - Cable hole;

[0046] 60-coaxial cable;

[0047] 2-High-frequency radiation unit;

[0048] 3-Reflector. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] In the above description, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0054] In existing technologies, mobile communication antennas include one or more intermediate frequency (IF) radiating elements and multiple high-frequency radiating elements, with the IF and high-frequency radiating elements arranged alternately on the same ground plane. Mobile communication antennas address inter-frequency coupling interference by incorporating decoupling circuits. However, additional decoupling circuits increase design complexity and introduce additional insertion loss. Furthermore, mobile communication antennas can also address inter-frequency coupling interference by using frequency selective surfaces, but this further increases the antenna's size and the complexity of its design and manufacturing processes.

[0055] To address the aforementioned issues, this invention provides a self-decoupling intermediate frequency (IF) radiating element and a mobile communication antenna. Each radiating arm of the self-decoupling IF radiating element contains a metal patch, which forms a capacitive-inductive resonant circuit with each radiating arm. This circuit adds at least one high-frequency resonant point, ensuring that the electrical performance of the self-decoupling IF radiating element remains unaffected while maintaining the characteristic of transmitting high-frequency electromagnetic waves. This allows electromagnetic waves generated by the high-frequency radiating element nested below the self-decoupling IF radiating element to effectively pass through, resulting in good spatial radiation. Specifically applied in mobile communication antennas, this eliminates the need for additional decoupling circuits, avoids increased insertion loss, and reduces the complexity of designing and manufacturing common-aperture antennas, as well as their size.

[0056] The self-decoupling intermediate frequency radiation unit and mobile communication antenna provided in the embodiments of the present invention will be described in detail below with reference to specific embodiments.

[0057] Figure 1 This is a schematic diagram of the structure of a self-decoupling intermediate frequency radiation unit provided in an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the self-decoupling intermediate frequency radiation unit from another angle; Figure 3 for Figure 1 A schematic diagram of the explosion of the self-decoupled intermediate frequency radiation unit.

[0058] like Figures 1 to 3 As shown, an embodiment of the present invention provides a self-decoupled intermediate frequency radiation unit 1, including a radiation substrate 10, a dielectric block 20, two sets of orthogonally polarized dipoles, and four metal patches 40.

[0059] like Figure 10 As shown, the self-decoupling intermediate frequency (IF) radiating element 1 is used in a mobile communication antenna, which also includes a high-frequency radiating element 2, thus enabling the mobile communication antenna to have multi-band performance and meet usage requirements. The IF band used by the self-decoupling IF radiating element 1 is 1.71 GHz to 2.17 GHz, and it can transmit electromagnetic waves generated by the high-frequency radiating element 2. The transmitted high-frequency band can be 3.4 GHz to 3.6 GHz. It can solve the problem of inter-frequency coupling interference between the self-decoupling IF radiating element 1 and the high-frequency radiating element 2, avoid the distortion of the radiation pattern of the high-frequency radiating element 2, and effectively transmit the electromagnetic waves generated by the high-frequency radiating element 2 nested below the self-decoupling IF radiating element 1.

[0060] The dielectric block 20 and two sets of orthogonally polarized dipoles are respectively disposed on both sides of the radiating substrate 10, and each set of orthogonally polarized dipoles includes two opposing radiating arms 30.

[0061] The radiating substrate 10 can be square. In other cases, the radiating substrate 10 can also be other shapes.

[0062] The dielectric block 20 can be square in shape. Alternatively, the dielectric block 20 can be other shapes. The dielectric block 20 can support the radiating substrate 10.

[0063] When the self-decoupled intermediate frequency radiating unit 1 is disposed on the reflector 3 of the mobile communication antenna, the dielectric block 20 is located on the upper side of the radiating substrate 10, and the two sets of orthogonally polarized dipoles are located on the lower side of the radiating substrate 10.

[0064] Radiation arm 30 is a closed outer loop circuit. A closed outer loop circuit can be understood as a completely closed loop circuit, that is, there are no breaks or gaps in the outer contour of the loop circuit.

[0065] The radiating arm 30 can be made of metals such as copper or aluminum. Specifically, the radiating arm 30 can be set on the radiating substrate 10 by electroplating or other methods.

[0066] Four metal patches 40 are disposed on the radiating substrate 10. The four metal patches 40 and two sets of orthogonally polarized dipoles are located on the same side of the radiating substrate 10. Each radiating arm 30 is internally configured with a metal patch 40. The metal patches 40 are spaced apart inside the radiating arm 30. Each metal patch 40 and each radiating arm 30 form a capacitive-inductive resonant circuit, which adds at least one high-frequency resonant point. By adding at least one high-frequency resonant point through the capacitive-inductive resonant circuit, the electrical performance of the self-decoupled intermediate frequency radiating unit 1 is not affected, while it has the characteristic of transmitting high-frequency electromagnetic waves. This allows the electromagnetic waves generated by the high-frequency radiating unit 2, nested below the self-decoupled intermediate frequency radiating unit 1, to be effectively transmitted, thereby producing good radiation into space. Specifically, in mobile communication antennas, this eliminates the need for additional decoupling circuits, does not increase insertion loss, and reduces the complexity of design and manufacturing processes, as well as the size of the antenna.

[0067] It should be noted that the annular groove between the metal patch 40 and the radiating arm 30 is equivalent to a capacitor, the metal patch 40 is equivalent to an inductor, and the interaction between the metal patch 40 and the radiating arm 30 is equivalent to a capacitor-inductor resonant circuit.

[0068] The metal patch 40 can be a PCB board with a closed loop circuit.

[0069] The metal patch 40 can be polygonal in shape. Alternatively, the metal patch 40 can be circular or elliptical. In one optional embodiment, the metal patch 40 is a polygonal metal patch.

[0070] Optionally, such as Figure 2 and Figure 3 As shown, the dielectric block 20 covers the radiation substrate 10 at the corresponding positions of the four radiation arms 30.

[0071] The dielectric block 20 can be a dielectric block with a high dielectric constant. By setting a dielectric block with a high dielectric constant in the self-decoupling intermediate frequency radiation unit 1, the current path on the radiation arm 30 can be increased when the self-decoupling intermediate frequency radiation unit 1 is working, which is used to broaden the operating frequency band of the self-decoupling intermediate frequency radiation unit 1 and improve the impedance matching and isolation of the self-decoupling intermediate frequency radiation unit 1 itself.

[0072] In some examples, the material of the media block 20 can be FR4.

[0073] The dielectric block 20 may have four mounting holes 201, and the radiating substrate 10 has holes corresponding to the mounting holes 201. Specifically, the dielectric block 20 and the radiating substrate 10 can be mounted together with bolts.

[0074] Optionally, the self-decoupled intermediate frequency radiation unit 1 also includes a feeding balun, which is connected to the radiation substrate 10 and is used to feed two sets of orthogonally polarized dipoles.

[0075] The feeding balun can be any existing feeding structure, as long as it can feed two sets of dipoles; no restrictions are imposed here.

[0076] In one alternative implementation, such as Figure 1 As shown, the power-feeding balun includes a base 50 and two coaxial cables 60. One end of the two coaxial cables 60 is connected to the base 50, and the other end of the two coaxial cables 60 is used to feed two sets of orthogonally polarized dipoles.

[0077] Furthermore, a first power supply section 101 and a second power supply section 102 are provided on the radiating substrate 10. Two coaxial cables 60 are electrically connected to the first power supply section 101 and the second power supply section 102 respectively. The first power supply section 101 and the second power supply section 102 are used to power two sets of orthogonally polarized dipoles.

[0078] Specifically, the first feed unit 101 feeds two radiating arms 30 in a set of orthogonally polarized dipoles, and the second feed unit 102 feeds two radiating arms 30 in another set of orthogonally polarized dipoles.

[0079] The first power supply section 101 can be roughly Y-shaped. The first power supply section 101 can be made of metals such as copper and aluminum. Specifically, the first power supply section 101 can be disposed on the radiating substrate 10 by means of electroplating or the like.

[0080] To prevent a short circuit between the first power supply section 101 and the second power supply section 102, the second power supply section 102 has a metallized through-hole 1021. The material of the second power supply section 102 can be a metal such as copper or aluminum. Specifically, the second power supply section 102 can be disposed on the radiating substrate 10 by means of electroplating or other methods.

[0081] When the self-decoupled intermediate frequency radiating unit 1 is disposed on the reflector 3 of the mobile communication antenna, the first feed part 101 and the second feed part 102 are located on the upper side of the radiating substrate 10.

[0082] Optionally, such as Figure 1 As shown, the base 50 is provided with a first fixing hole 501, which is used to fix the base 50 to the reflector 3 of the mobile communication antenna.

[0083] In some examples, the first fixing hole 501 can be a threaded hole, and the number of first fixing holes 501 is two.

[0084] like Figure 2 and Figure 3 As shown, the base 50 is also provided with two cable holes 502, and two coaxial cables 60 are respectively connected to the two cable holes 502. There is a copper layer in the cable holes 502.

[0085] Optionally, such as Figure 1 As shown, the radiating substrate 10 is provided with a second fixing hole 103, which is used to fix the self-decoupling intermediate frequency radiating unit 1 on the reflector plate 3 of the mobile communication antenna.

[0086] The self-decoupling intermediate frequency radiating element 1 can be fixed to the reflector 3 of the mobile communication antenna by means of a cylinder. Specifically, one end of the cylinder is inserted into the second fixing hole 103, and the other end of the cylinder is inserted into the reflector 3.

[0087] The number of second fixing holes 103 can be two, and the number of cylinders is set in accordance with the number of second fixing holes 103.

[0088] Figure 4The S-parameter curves of the self-decoupling intermediate frequency (IF) radiating unit 1 in the 1.71 GHz to 2.17 GHz frequency range are shown. Within this range, the isolation of the self-decoupling IF radiating unit 1 is greater than 28 dB, and the return loss is greater than 15 dB. It should be noted that without the dielectric block 20, the self-decoupling IF radiating unit 1 exhibits a frequency band with a return loss less than 15 dB within the 1.71 GHz to 2.17 GHz frequency range, thus reducing its operating bandwidth and resulting in a frequency band with an isolation less than 28 dB. Therefore, by incorporating the dielectric block 20, the self-decoupling IF radiating unit 1 in this application can broaden its operating bandwidth and improve its impedance matching and isolation.

[0089] Figure 5 The horizontal radiation pattern of the self-decoupled intermediate frequency radiating element 1 in the range of 1.71 GHz to 2.17 GHz is shown. Its half-power beamwidth is 60.8765° to 68.2202°, ​​which meets the radiation index for base station antenna applications.

[0090] Figure 6 The transmission characteristic curves of the self-decoupled intermediate frequency radiation unit 1 in the range of 3.4 GHz to 3.6 GHz are shown. A high-frequency resonance point is generated between 3.5 GHz and 3.6 GHz. Its return loss is less than 10 dB in the range of 3.4 GHz to 3.6 GHz, which enables electromagnetic waves in this frequency band to effectively pass through the surface.

[0091] Figure 7 The high-frequency radiating element 2 is shown as a horizontal radiation pattern applied alone in the 3.4 GHz to 3.6 GHz range. Figure 8 The diagram shows the horizontal radiation pattern of the high-frequency radiation unit 2 in the range of 3.4 GHz to 3.6 GHz when the self-decoupled intermediate frequency radiation unit 1 is located above the high-frequency radiation unit 2. Figure 9 The diagram shows a comparison of the horizontal radiation patterns of self-decoupled intermediate frequency radiating element 1 located above high frequency radiating element 2 and high frequency radiating element 2 alone in the 3.4 GHz-3.6 GHz range. Figure 7 and Figure 8 and combined Figure 9 It can be seen that under the influence of the self-decoupled intermediate frequency radiation unit 1, the horizontal plane radiation pattern half-power beamwidth of the high-frequency radiation unit 2 diverges to a certain extent, but the overall radiation performance is good. It can be considered that the self-decoupled intermediate frequency radiation unit 1 has little influence on the high-frequency radiation unit 2. That is, it can be considered that the self-decoupled intermediate frequency radiation unit 1 has good transmission performance for the high-frequency radiation unit 2 in the 3.4GHz to 3.6GHz frequency band.

[0092] Figure 10This is a schematic diagram of the structure of a mobile communication antenna provided in an embodiment of the present invention.

[0093] like Figure 10 As shown, an embodiment of the present invention provides a mobile communication antenna, including a reflector 3, a plurality of high-frequency radiating elements 2 and at least one self-decoupling intermediate-frequency radiating element 1.

[0094] The self-decoupling intermediate frequency radiation unit 1 in this embodiment has the same structure as the self-decoupling intermediate frequency radiation unit 1 provided in any of the above embodiments, and can bring the same or similar technical effects. It will not be described in detail here, but can be referred to the description of the above embodiments.

[0095] The high-frequency radiation unit 2 and the self-decoupled intermediate-frequency radiation unit 1 are disposed on the reflector 3. The high-frequency radiation unit 2 and the self-decoupled intermediate-frequency radiation unit 1 are nested and staggered in the same location, with the self-decoupled intermediate-frequency radiation unit 1 located above the high-frequency radiation unit 2. It should be noted that the self-decoupled intermediate-frequency radiation unit 1 being located above the high-frequency radiation unit 2 means that the radiation substrate 10, dielectric block 20, two sets of orthogonally polarized dipoles, and four metal patches 40 of the self-decoupled intermediate-frequency radiation unit 1 are located above the high-frequency radiation unit 2.

[0096] It should be noted that mobile communication antennas can be either common-aperture antenna arrays or indoor distributed antennas.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-decoupling intermediate frequency radiation unit, characterized in that, It includes a radiating substrate, a dielectric block, two sets of orthogonally polarized dipoles, and four metal patches; The dielectric block and the two sets of orthogonally polarized dipoles are respectively disposed on both sides of the radiating substrate. Each set of orthogonally polarized dipoles includes two opposing radiating arms, and the radiating arms are closed outer loop circuits. Four metal patches are disposed on the radiating substrate. The four metal patches and two sets of orthogonally polarized dipoles are located on the same side of the radiating substrate. Each radiating arm is equipped with one metal patch. The metal patches are spaced apart inside the radiating arm. Each metal patch and each radiating arm are used to form a capacitor-inductor resonant circuit. The capacitor-inductor resonant circuit is used to add at least one high-frequency resonant point. The dielectric block covers the radiation substrate at the corresponding locations of the four radiation arms; The dielectric block is a dielectric block with a high dielectric constant.

2. The self-decoupling intermediate frequency radiation unit according to claim 1, characterized in that, The metal patch is a polygonal metal patch.

3. The self-decoupling intermediate frequency radiation unit according to claim 1, characterized in that, It also includes a feeding balun connected to the radiating substrate, the feeding balun being used to feed two sets of orthogonally polarized dipoles.

4. The self-decoupling intermediate frequency radiation unit according to claim 3, characterized in that, The power balun includes a base and two coaxial cables. One end of the two coaxial cables is connected to the base, and the other end of the two coaxial cables is used to power two sets of orthogonally polarized dipoles.

5. The self-decoupling intermediate frequency radiation unit according to claim 4, characterized in that, The radiating substrate is provided with a first feed section and a second feed section, and two coaxial cables are electrically connected to the first feed section and the second feed section respectively. The first feed section and the second feed section are used to feed two sets of orthogonally polarized dipoles.

6. The self-decoupling intermediate frequency radiation unit according to claim 5, characterized in that, The second power supply section has a metallized via, which is used to prevent a short circuit between the first power supply section and the second power supply section.

7. The self-decoupling intermediate frequency radiation unit according to claim 4, characterized in that, The base is provided with a first fixing hole, which is used to fix the base to the reflector.

8. The self-decoupling intermediate frequency radiation unit according to claim 7, characterized in that, The radiating substrate is provided with a second fixing hole, which is used to fix the self-decoupling intermediate frequency radiating unit on the reflector.

9. A mobile communication antenna, characterized in that, It includes a reflector, multiple high-frequency radiating units, and at least one self-decoupling intermediate-frequency radiating unit as described in any one of claims 1-8; The high-frequency radiation unit and the self-decoupled intermediate-frequency radiation unit are disposed on the reflector plate. The high-frequency radiation unit and the self-decoupled intermediate-frequency radiation unit are nested and staggered in the same location, with the self-decoupled intermediate-frequency radiation unit located above the high-frequency radiation unit.

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