High-isolation dual-polarized antenna and antenna module

Abstract

The application provides a high-isolation dual-polarized antenna and an antenna module, and relates to the technical field of phased array antennas.The antenna comprises six dielectric substrates which are sequentially stacked from top to bottom;an elbow-shaped probe is arranged on the second dielectric substrate;an out-of-layer coupling slot is arranged on the third dielectric substrate, and the elbow-shaped probe is located above the out-of-layer coupling slot;horizontal polarization feed lines and vertical polarization feed lines are arranged on the fourth dielectric substrate, and the out-of-layer coupling slot is located above the horizontal polarization feed lines;first signal holes are arranged through the third dielectric substrate, the fourth dielectric substrate, the fifth dielectric substrate and the sixth dielectric substrate;second signal holes are arranged through the first dielectric substrate, the second dielectric substrate and the third dielectric substrate;the horizontal polarization feed lines and the vertical polarization feed lines are connected with the first signal holes;and the elbow-shaped probe is connected with the second signal holes.The application solves the problem of poor isolation between existing dual-polarized antennas, and improves the performance of the antenna.

Description

Technical Field

[0001] This invention relates to the field of phased array antenna technology, and more specifically, to a high-isolation dual-polarized antenna and antenna module. Background Technology

[0002] With the rapid development of wireless communication systems, the performance requirements for antennas are becoming increasingly demanding. Traditional antennas have limitations in terms of system integration and low cost, making it difficult to meet the needs of modern communication systems for highly integrated, low-cost, and miniaturized antennas. In phased array antennas, antenna subarrays are often used as standardized modules. Different numbers of antenna subarrays are arranged in a certain way to form a larger-scale antenna array. This eliminates the need to design different antennas for different antenna arrays, and the "subarray" design allows for mass production of antenna arrays, reducing antenna production costs.

[0003] In wireless communication systems, dual-polarized antennas represent a current development trend in phased array antennas. Because dual-polarized antennas can simultaneously contain signals with two orthogonal polarizations (horizontal and vertical), they effectively improve the capacity and spectral efficiency of communication systems, and are widely used in base stations, satellite communications, radar, and other fields. However, common dual-polarized antennas currently suffer from insufficient isolation, leading to signal interference, increased bit error rate, and decreased communication quality, thus limiting further performance improvements. For example, in complex multipath propagation environments, insufficient antenna isolation can cause crosstalk between different polarized signals, distorting the received signal and affecting accurate data transmission. Furthermore, existing dual-polarized antennas also have structural design flaws, making it difficult to meet the demands for miniaturization and lightweight design.

[0004] Current research findings indicate that dual-polarized antennas generally suffer from narrow bandwidth and poor isolation between different polarizations. For example... Figure 1 The image shows a traditional dual-polarization antenna feeding method. Different polarizations of the antenna use the same type of feeding. The isolation between different polarizations of this type of antenna is only about 15dB. Crosstalk between signals of different polarizations will cause distortion of the received signal and affect the accurate transmission of data.

[0005] To meet the demands of modern communication systems for dual-polarized antennas with high isolation, wide bandwidth, and high integration, the development of a high-isolation dual-polarized antenna is of paramount importance. Summary of the Invention

[0006] The embodiments of the present invention provide a high-isolation dual-polarized antenna and antenna module to solve the technical problems existing in the prior art.

[0007] Other features and advantages of the invention will become apparent from the following detailed description, or may be learned in part by practice of the invention.

[0008] According to a first aspect of the present invention, a high-isolation dual-polarized antenna is provided, comprising: a first dielectric substrate, a second dielectric substrate, a third dielectric substrate, a fourth dielectric substrate, a fifth dielectric substrate, and a sixth dielectric substrate stacked sequentially from top to bottom;

[0009] The second dielectric substrate is provided with a bent probe;

[0010] A heterogeneous coupling gap is provided on the third dielectric substrate, and the bent probe is located above the heterogeneous coupling gap;

[0011] The fourth dielectric substrate is provided with a horizontal polarization feed line and a vertical polarization feed line, and the heterogeneous coupling gap is located above the horizontal polarization feed line;

[0012] A first signal hole is provided through the third, fourth, fifth, and sixth dielectric substrates;

[0013] A second signal hole is provided through the first dielectric substrate, the second dielectric substrate, and the third dielectric substrate;

[0014] The horizontally polarized feed line and the vertically polarized feed line are connected to the first signal aperture;

[0015] The beveled probe is connected to the second signal hole.

[0016] In some embodiments of the present invention, based on the foregoing scheme, a radiation patch is provided on the upper surface of the first dielectric substrate.

[0017] In some embodiments of the present invention, based on the foregoing scheme, the heterogeneous coupling gap is an H-shaped gap.

[0018] In some embodiments of the present invention, based on the foregoing scheme, a chip-end adapter feeder is provided on the sixth dielectric substrate, and the chip-end adapter feeder is connected to the first signal hole.

[0019] In some embodiments of the present invention, based on the aforementioned scheme, each dielectric substrate is provided with a signal shielding hole.

[0020] In some embodiments of the present invention, based on the foregoing scheme, a clearance ring is provided around the first signal hole.

[0021] In some embodiments of the present invention, based on the foregoing scheme, a clearance ring is provided around the second signal hole.

[0022] According to a second aspect of the present invention, a high-isolation dual-polarized antenna module is provided, comprising: an active chip and an antenna as described in the first aspect;

[0023] The active chip is provided with an RF input port and an RF output port;

[0024] The radio frequency output port is connected to the signal input terminal of the antenna.

[0025] The technical solution of this invention achieves high isolation between different polarizations of a dual-polarized antenna through heterogeneous coupling feeding and adjacent coupling feeding with a beveled probe, aiming to solve the problem of poor isolation between dual-polarized antennas in existing PCB multilayer boards and improve antenna performance.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0028] Figure 1 A schematic diagram of a conventional dual-polarized antenna feed is shown;

[0029] Figure 2 A top view of a high-isolation dual-polarized antenna is shown;

[0030] Figure 3 A side view of a high-isolation dual-polarized antenna is shown;

[0031] Figure 4 A schematic diagram of the structure of the first dielectric substrate is shown;

[0032] Figure 5 A schematic diagram of the structure of the second dielectric substrate is shown;

[0033] Figure 6 A schematic diagram of the third dielectric substrate is shown;

[0034] Figure 7 A schematic diagram of the fourth dielectric substrate is shown;

[0035] Figure 8 A schematic diagram of the structure of the fifth dielectric substrate is shown;

[0036] Figure 9A schematic diagram of the sixth dielectric substrate is shown;

[0037] Figure 10 A simplified example diagram of the chip is shown;

[0038] Figure 11 A schematic diagram of a structure consisting of four antennas and one active chip is shown.

[0039] Figure 12 A side view of a high-isolation dual-polarized antenna module is shown.

[0040] Explanation of reference numerals in the attached figures

[0041] 1-First dielectric substrate, 2-Second dielectric substrate, 3-Third dielectric substrate, 4-Fourth dielectric substrate, 5-Fifth dielectric substrate, 6-Sixth dielectric substrate, 7-First signal hole, 8-Second signal hole, 9-Allowing ring, 10-Signal shielding hole, 11-Radiating patch, 21-Chamfered probe, 31-Heterogeneous coupling gap, 41-Horizontal polarization feed line, 42-Vertical polarization feed line, 61-Chip end adapter feed line. Detailed Implementation

[0042] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the invention will be more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.

[0043] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the invention. However, those skilled in the art will recognize that the technical solutions of the invention can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of the invention.

[0044] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of these terms can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described.

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0046] The following detailed description of some embodiments of the present invention will be provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0047] To address the technical problems existing in the prior art, this invention provides a high-isolation dual-polarized antenna. The horizontal polarization of this antenna is fed by a heterogeneous slot coupling feed, and the vertical polarization is fed by a beveled probe adjacent coupling feed. This dual-polarized antenna achieves an isolation of over 45dB between different polarizations in the 16GHz-22GHz range, realizing high isolation between different polarizations within the same antenna.

[0048] Specifically, the dual-polarized antenna includes: a first dielectric substrate, a second dielectric substrate, a third dielectric substrate, a fourth dielectric substrate, a fifth dielectric substrate, and a sixth dielectric substrate stacked sequentially from top to bottom;

[0049] The second dielectric substrate is provided with a bent probe;

[0050] A heterogeneous coupling gap is provided on the third dielectric substrate, and the bent probe is located above the heterogeneous coupling gap;

[0051] The fourth dielectric substrate is provided with a horizontal polarization feed line and a vertical polarization feed line, and the heterogeneous coupling gap is located above the horizontal polarization feed line;

[0052] A first signal hole is provided through the third, fourth, fifth, and sixth dielectric substrates;

[0053] A second signal hole is provided through the first dielectric substrate, the second dielectric substrate, and the third dielectric substrate;

[0054] The horizontally polarized feed line and the vertically polarized feed line are connected to the first signal aperture;

[0055] The beveled probe is connected to the second signal hole.

[0056] It should be noted that the horizontally polarized signal enters the antenna through the first signal aperture, passes through the horizontally polarized feed line, and is then coupled to the radiating patch by the heterogeneous coupling slot.

[0057] The vertically polarized signal enters the antenna through the first signal aperture, then passes through the vertically polarized feed line, and enters the second signal aperture, where it is coupled to the radiating patch via a beveled probe.

[0058] It should be noted that the "U"-shaped probe in this embodiment specifically refers to the "Г"-shaped probe.

[0059] In some feasible embodiments, based on the aforementioned scheme, a radiation patch is disposed on the upper surface of the first dielectric substrate.

[0060] In some feasible embodiments, based on the aforementioned scheme, the heterogeneous coupling gap is an H-shaped gap.

[0061] It is understandable that heterogeneous coupling gaps are not limited to H-shapes, but can also be other shapes, with the specific shape determined according to actual needs.

[0062] In some feasible embodiments, based on the aforementioned scheme, a chip-end adapter feeder is provided on the sixth dielectric substrate, and the chip-end adapter feeder is connected to the first signal hole.

[0063] Understandably, the chip-side adapter feeder is used to receive signals transmitted from the outside and transmit the received signals to the first signal aperture.

[0064] In some feasible embodiments, based on the aforementioned scheme, each dielectric substrate is provided with a signal shielding hole.

[0065] Understandably, the signal shielding holes effectively suppress harmful surface wave propagation, prevent the coupling of interference within the board, improve the purity and gain of the antenna pattern, and protect sensitive circuits.

[0066] In some feasible embodiments, based on the aforementioned scheme, a clearance ring is provided around the first signal hole.

[0067] In some feasible embodiments, based on the aforementioned scheme, a clearance ring is provided around the second signal hole.

[0068] As is understandable, a clearance ring is a copper-free area specifically designed around a via or pad. Its core function is to ensure signal integrity.

[0069] Setting a clearance ring around the first and second signal holes can ensure the integrity of the signals transmitted in the first and second signal holes.

[0070] For example, see Figure 2 The image shows a top view of a high-isolation dual-polarized antenna.

[0071] See Figure 3The image shows a side view of a high-isolation dual-polarized antenna.

[0072] See Figure 4 The diagram shows a schematic representation of the structure of the first dielectric substrate.

[0073] See Figure 5 The diagram shows a schematic representation of the structure of the second dielectric substrate.

[0074] See Figure 6 The diagram shows a schematic of the structure of the third dielectric substrate.

[0075] See Figure 7 The diagram shows a schematic of the structure of the fourth dielectric substrate.

[0076] See Figure 8 The diagram shows a schematic of the structure of the fifth dielectric substrate.

[0077] See Figure 9 The diagram shows a schematic of the sixth dielectric substrate.

[0078] like Figure 2 and Figure 3 As shown, the antenna includes: a first dielectric substrate 1, a second dielectric substrate 2, a third dielectric substrate 3, a fourth dielectric substrate 4, a fifth dielectric substrate 5, and a sixth dielectric substrate 6; the six dielectric substrates are stacked sequentially from top to bottom.

[0079] like Figure 4 As shown, a radiation patch 11 and a signal shielding hole 10 are disposed on the first dielectric substrate 1. Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the second signal hole 8 passes through the first dielectric substrate 1, the second dielectric substrate 2 and the third dielectric substrate 3 in sequence.

[0080] like Figure 5 As shown, a bent probe 21 and a signal shielding hole 10 are provided on the second dielectric substrate 2, and the bent probe 21 is connected to the second signal hole 8.

[0081] like Figure 6 As shown, the third dielectric substrate 3 is provided with an H-shaped heterogeneous coupling gap 31 and a signal shielding hole 10.

[0082] like Figures 6 to 9 As shown, there are two first signal holes 7, which pass through the third dielectric substrate 3, the fourth dielectric substrate 4, the fifth dielectric substrate 5 and the sixth dielectric substrate 6 from top to bottom.

[0083] like Figure 6 As shown, a clearance ring 9 is provided around the second signal hole 8. Figures 7 to 9As shown, a clearance ring 9 is also provided around the first signal hole 7.

[0084] like Figure 7 As shown, the fourth dielectric substrate 4 is provided with a horizontally polarized feed line 41, a vertically polarized feed line 42, and a signal shielding hole 10.

[0085] The horizontally polarized feed line 41 and the vertically polarized feed line 42 are connected to the first signal hole 7, and a clearance ring 9 is provided around the first signal hole 7.

[0086] like Figure 8 As shown, the fifth dielectric substrate 5 is also provided with a signal shielding hole 10.

[0087] like Figure 9 As shown, a chip-end adapter feed line 61 and a signal shielding hole 10 are provided on the sixth dielectric substrate 6, and the chip-end adapter feed line 61 is connected to the first signal hole 7.

[0088] The antenna shares the same radiating patch for both horizontal and vertical polarization. Horizontal polarization signals are coupled to the radiating patch via a gap between different layers, while vertical polarization signals are coupled to the patch adjacently via a bevel probe. The bevel probe for vertical polarization is located above the gap coupling. These two different feeding methods result in a coupling degree greater than 45 dB between the two polarizations, and the reflection coefficients of both polarizations are less than -10 dB in the 16 GHz–22 GHz range.

[0089] Based on the same inventive concept, this invention also provides a high-isolation dual-polarized antenna module, characterized in that it includes: an active chip and an antenna as described in the above embodiments;

[0090] The active chip is provided with an RF input port and an RF output port;

[0091] The radio frequency output port is connected to the signal input terminal of the antenna.

[0092] Specifically, the RF output port is connected to the chip-end adapter feeder on the sixth dielectric substrate of the antenna.

[0093] For example, such as Figure 10As shown, the active chip includes eight RF output ports and one RF input port. The RF signal from the feed network enters the chip input port and then passes through the eight RF output ports to the chip's feed line. The horizontally polarized signal is coupled to the radiating patch via a first signal aperture and a heterogeneous coupling gap. The vertically polarized signal enters the second signal aperture via the feed line and is then coupled to the radiating patch via a beveled probe. Specifically, RF1, RF3, RF5, and RF7 of the active chip are fed with horizontally polarized signals, while RF2, RF4, RF6, and RF8 are fed with vertically polarized signals. An antenna module consists of four dual-polarized antenna elements, a power supply module, a control circuit, and the active chip. This PCB multilayer composite board is integrally manufactured, eliminating the need for connectors and cables connecting different modules, reducing costs and avoiding the unreliability associated with connector installation.

[0094] like Figure 11 and Figure 12 As shown, one chip can feed signals to four antenna elements. Therefore, a single phased array antenna module consists of 4, 8, or multiples of an integer number of antenna elements. If the number of phased array antenna modules exceeds 4, a separate feeding network is required to feed the chip. This feeding network can be placed on the third dielectric substrate, sharing a layer with the antenna feed lines, thus saving antenna manufacturing costs. The power supply module and control circuit can be placed on the fourth and sixth dielectric substrates. The fifth dielectric substrate mentioned in this invention can be divided into multiple layers depending on the specific circumstances in actual use.

[0095] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. It should be understood that the invention is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A high-isolation dual-polarized antenna, characterized in that, include: The first dielectric substrate, the second dielectric substrate, the third dielectric substrate, the fourth dielectric substrate, the fifth dielectric substrate, and the sixth dielectric substrate are stacked sequentially from top to bottom; The second dielectric substrate is provided with a bent probe; A heterogeneous coupling gap is provided on the third dielectric substrate, and the bent probe is located above the heterogeneous coupling gap; The fourth dielectric substrate is provided with a horizontal polarization feed line and a vertical polarization feed line, and the heterogeneous coupling gap is located above the horizontal polarization feed line; A first signal hole is provided through the third, fourth, fifth, and sixth dielectric substrates; A second signal hole is provided through the first dielectric substrate, the second dielectric substrate, and the third dielectric substrate; The horizontally polarized feed line and the vertically polarized feed line are connected to the first signal aperture; The beveled probe is connected to the second signal hole; A radiating patch is disposed on the upper surface of the first dielectric substrate; The horizontally polarized signal enters the antenna through the first signal aperture, passes through the horizontally polarized feed line, and is coupled to the radiating patch by the heterogeneous coupling slot. The vertically polarized signal enters the antenna through the first signal aperture, then passes through the vertically polarized feed line, and enters the second signal aperture, where it is coupled to the radiating patch via a beveled probe.

2. The antenna according to claim 1, characterized in that, The heterogeneous coupling gap is an H-shaped gap.

3. The antenna according to claim 1, characterized in that, A chip-end adapter feeder is provided on the sixth dielectric substrate, and the chip-end adapter feeder is connected to the first signal hole.

4. The antenna according to any one of claims 1-3, characterized in that, Each dielectric substrate has signal shielding holes.

5. The antenna according to any one of claims 1-3, characterized in that, A clearance ring is provided around the first signal hole.

6. The antenna according to any one of claims 1-3, characterized in that, A clearance ring is provided around the second signal hole.

7. A high-isolation dual-polarized antenna module, characterized in that, include: Active chip and antenna as described in any one of claims 1-6; The active chip is provided with an RF input port and an RF output port; The radio frequency output port is connected to the signal input terminal of the antenna.

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