A dual-polarized antenna and communication device

Abstract

The application discloses a dual-polarized antenna and a communication device, and belongs to the technical field of communication. The antenna body comprises a dielectric substrate, a parasitic unit and a parasitic patch arranged on one side of the dielectric substrate, a radiation patch unit comprising a first radiation patch, a second radiation patch and a third radiation patch, and a first monopole radiation unit and a second monopole radiation unit. The radiation patch unit is arranged along the circumference of the parasitic unit. The first monopole radiation unit and the second monopole radiation unit are used as feed lines of two ports, the first monopole radiation unit has overlapping parts with the parasitic unit and the first radiation patch, and the second monopole radiation unit has overlapping parts with the second radiation patch and the third radiation patch. The dual-polarized antenna can excite four resonance modes in the vertical polarization direction and three resonance modes in the horizontal polarization direction, and wideband characteristics are realized through the multiple resonance modes, and better frequency selectivity is also achieved.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and in particular to a dual-polarized antenna and communication device. Background Technology

[0002] With the continuous development and advancement of 5G communication technology, the design requirements for antennas are becoming increasingly stringent due to the limited spectrum. Dual-polarized antennas offer superior performance compared to single-polarized antennas, better utilizing the spatial dimensions of electromagnetic waves to increase system communication capacity, thereby enabling diverse applications and adapting to more complex environments.

[0003] Microstrip antennas are generally composed of a dielectric substrate, a radiator, and a ground plane. They have many advantages in terms of structure and physical performance, such as low profile and easy processing. However, microstrip antennas have a relatively narrow bandwidth and poor frequency selectivity, which cannot meet the frequency band coverage requirements of communication equipment with a wider range of applications. Summary of the Invention

[0004] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a dual-polarized antenna and communication device to solve the technical problems of relatively narrow bandwidth and poor frequency selectivity of microstrip antennas in the prior art.

[0005] To address the aforementioned technical problems, in a first aspect, this application provides:

[0006] A dual-polarized antenna includes an antenna body, the antenna body comprising:

[0007] Dielectric substrate;

[0008] Parasitic units and parasitic patches are respectively disposed on one side of the dielectric substrate;

[0009] A radiating patch unit includes a first radiating patch, a second radiating patch, and a third radiating patch, wherein the first radiating patch, the second radiating patch, and the third radiating patch are disposed on the same side of the dielectric substrate along the circumferential direction of the parasitic unit and the parasitic unit.

[0010] The first monopole radiating element and the second monopole radiating element are respectively disposed on the side of the dielectric substrate away from the parasitic element and the parasitic patch. The first monopole radiating element is the feed line of the first port of the antenna body, and the second monopole radiating element is the feed line of the second port of the antenna body. The projections of the first monopole radiating element, the parasitic element, and the first radiating patch on the same plane have overlapping portions. The projections of the second monopole radiating element, the second radiating patch, and the third radiating patch on the same plane have overlapping portions.

[0011] In addition, the dual-polarized antenna according to this application may also have the following additional technical features:

[0012] In some embodiments of this application, the antenna body further includes a first bent stub and a second bent stub, the first bent stub and the second bent stub being respectively connected to two opposite sides of the first radiating patch near the parasitic unit, and the first bent stub and the second bent stub being arranged opposite to each other.

[0013] In some embodiments of this application, a serpentine high-resistivity wire connects the second radiating patch and the parasitic patch.

[0014] In some embodiments of this application, open-circuit stubs are respectively provided at both ends of the first radiating patch away from the second radiating patch, and the two open-circuit stubs are arranged opposite to each other.

[0015] In some embodiments of this application, the parasitic unit is provided with a cross groove.

[0016] In some embodiments of this application, the parasitic patch has grooves.

[0017] In some embodiments of this application, a serrated structure is formed on the inner side of the radiating patch unit, the serrated structure including a plurality of protrusions and a plurality of recesses.

[0018] In some embodiments of this application, the antenna body further includes a first grounding unit and a second grounding unit, the first grounding unit and the second grounding unit being disposed on the other side of the dielectric substrate, the first grounding unit being part of the first port feed of the antenna body, the second grounding unit being part of the second port feed of the antenna body, the first grounding unit being connected to the first radiating patch, and the second grounding unit being connected to the third radiating patch.

[0019] In some embodiments of this application, the dual-polarized antenna further includes a reflector, which is disposed opposite to the side of the dielectric substrate away from the radiating patch unit, and there is a gap between the dielectric substrate and the antenna body.

[0020] Secondly, this application also provides a communication device including the dual-polarized antenna described in any of the above embodiments.

[0021] Compared to existing technologies, the beneficial effects of this application are:

[0022] This application proposes a dual-polarized antenna. The antenna body includes: a dielectric substrate, parasitic elements and parasitic patches respectively disposed on one side of the dielectric substrate, including a radiating patch unit comprising a first radiating patch, a second radiating patch, and a third radiating patch, as well as a first monopole radiating element and a second monopole radiating element. The first, second, and third radiating patches are disposed on the same side of the dielectric substrate along the circumferential direction of the parasitic element. The first and second monopole radiating elements are respectively disposed on the side of the dielectric substrate opposite to the parasitic element and the parasitic patch. The first monopole radiating element serves as the feed line to a first port of the antenna body, and the second monopole radiating element serves as the feed line to a second port of the antenna body. The projections of the first monopole radiating element onto the same plane overlap with the parasitic element and the first radiating patch, respectively, and the projections of the second monopole radiating element onto the same plane overlap with the projections of the second and third radiating patches, respectively.

[0023] When a dual-polarized antenna is used, four resonant modes can be excited in the vertical polarization direction: such as Figure 7 The first port shown operates in low-frequency loop mode, such as... Figure 8 The first port shown operates in slot mode in the mid-frequency band, such as... Figure 9 The first port shown operates in a high-frequency monopole mode and as... Figure 10 The pattern shown is a rhomboid parasitic unit.

[0024] Three resonant modes can be excited in the horizontal polarization direction: such as Figure 11 The second port shown operates in a low-frequency T-pattern mode, such as... Figure 12 The second port shown operates in slot-coupled mode in the mid-frequency range, and as... Figure 13 The second port shown operates in a rectangular parasitic patch mode at a high frequency.

[0025] The dual-polarized antenna provided in this application achieves orthogonal polarization on a dielectric substrate within an effective space through a first monopole radiating element and a second monopole radiating element. Multiple resonant modes can be excited through a coupled radiating patch element, thereby realizing the ultra-wideband characteristics of the dual-polarized antenna. At the same time, the ultra-wideband characteristics achieved through multi-mode also have better frequency selectivity. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1This application shows a schematic diagram of the overall structure of a dual-polarized antenna in some embodiments;

[0028] Figure 2 This application shows a schematic diagram of a dual-polarized antenna from one viewpoint in some embodiments;

[0029] Figure 3 This paper shows a schematic diagram of the dual-polarized antenna from another perspective in some embodiments of this application;

[0030] Figure 4 This illustration shows another perspective view of the dual-polarized antenna structure in some embodiments of this application;

[0031] Figure 5 The following are schematic diagrams showing the structure of the first and second ports of the dual-polarized antenna in some embodiments of this application;

[0032] Figure 6 The following is a schematic diagram of the structure of a dual-polarized antenna radiating patch unit in some embodiments of this application;

[0033] Figure 7 A schematic diagram of a first resonant mode of the first port of a dual-polarized antenna in some embodiments of this application is shown;

[0034] Figure 8 A schematic diagram of a second resonant mode at the first port of a dual-polarized antenna in some embodiments of this application is shown;

[0035] Figure 9 A schematic diagram of a third resonant mode at the first port of a dual-polarized antenna in some embodiments of this application is shown;

[0036] Figure 10 A schematic diagram of a fourth resonant mode at the first port of a dual-polarized antenna in some embodiments of this application is shown;

[0037] Figure 11 A schematic diagram of a first resonant mode of the second port of a dual-polarized antenna in some embodiments of this application is shown;

[0038] Figure 12 A schematic diagram of a second resonant mode of the second port of a dual-polarized antenna in some embodiments of this application is shown;

[0039] Figure 13 A schematic diagram of a third resonant mode at the second port of a dual-polarized antenna in some embodiments of this application is shown;

[0040] Figure 14 This paper shows a comparison diagram of the cross-polarization ratio Phi = 0° for dual-polarized antennas in some embodiments of this application;

[0041] Figure 15This paper shows a comparison diagram of the cross-polarization ratio Phi = 90° of dual-polarized antennas in some embodiments of this application;

[0042] Figure 16 A comparison diagram of the isolation (ISO) of dual-polarized antennas in some embodiments of this application is shown;

[0043] Figure 17 This application shows a comparison of the radiation patterns of dual-polarized antennas at Phi = 0° in some embodiments;

[0044] Figure 18 This application shows a comparison of the radiation patterns of dual-polarized antennas at Phi = 90° in some embodiments;

[0045] Figure 19 The diagram shows the return loss curves of the first and second ports of the dual-polarized antenna in some embodiments of this application.

[0046] Explanation of key component symbols:

[0047] 1000-Dual polarized antenna; 100-Antenna body; 110-Dielectric substrate; 111-Metallized via; 120-Parasitic element; 121-Cross slot; 130-Parasitic patch; 131-Groove; 140-Radiating patch element; 141-First radiating patch; 142-Second radiating patch; 143-Third radiating patch; 144-Sawtooth structure; 145-Slot; 151-First port; 152-Second port; 161-First monopole radiating element; 162-Second monopole radiating element; 171-First grounding element; 172-Second grounding element; 181-First bent stub; 182-Second bent stub; 191-Serpentine high-impedance line; 192-Open stub; 193-Strip; 200-Reflector. Detailed Implementation

[0048] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0049] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0050] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0051] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] In this application, unless otherwise expressly 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," "on top of," and "over" 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] Before describing this embodiment, the concepts involved will be briefly explained:

[0054] Cross-polarization: Mobile communication systems often employ receive diversity techniques in uplink reception. Cross-polarization is a technique that uses orthogonal polarization to arrange antenna arrays to maximize polarization diversity while minimizing antenna size for easier installation. The concept of cross-polarization ratio primarily describes the polarization purity of ±45° polarized (or other orthogonal polarization) antennas, specifically defined as the ratio of the main polarization component to the cross-polarization component. A higher cross-polarization ratio indicates stronger orthogonality of the signals received from the antenna, lower correlation between the two signals, and better polarization performance.

[0055] Antenna isolation: refers to the ratio of the power of the signal transmitted by one antenna to the power of the signal received by another antenna.

[0056] Directional radiation refers to the emission and reception of electromagnetic waves in one or more specific directions, while the emission and reception of electromagnetic waves in other directions are zero or extremely weak. The purpose of using directional radiation antennas is to increase the effective utilization of radiated power and enhance security. The main purpose of using directional receiving antennas is to enhance signal strength and increase anti-interference capabilities.

[0057] Omnidirectional radiation: This means that it radiates uniformly in all 360° directions on the horizontal radiation pattern, which is commonly referred to as non-directional. On the vertical radiation pattern, it appears as a beam with a certain width. Generally, the smaller the beam width, the greater the gain. Omnidirectional antennas are commonly used in mobile communication systems for suburban and large-area coverage.

[0058] Capacitive coupling refers to the electromagnetic coupling method in which an electromagnetic interference source acts on a sensitive object through the electric field between circuits or systems and in the form of mutual capacitance (coupling capacitance).

[0059] Inductive coupling refers to the electromagnetic coupling method in which an electromagnetic interference source acts on a sensitive object through the magnetic field between circuits or systems and in the form of mutual inductance (coupled inductance).

[0060] Impedance matching is primarily used on transmission lines to ensure that all high-frequency microwave signals can be transmitted to the load point with minimal signal reflection back to the source, thus improving energy efficiency. Impedance matching occurs when the internal resistance of the signal source is equal in magnitude and phase to the characteristic impedance of the connected transmission line, or when the characteristic impedance of the transmission line is equal in magnitude and phase to the impedance of the connected load.

[0061] Relative bandwidth (ffoc): Relative bandwidth is the ratio of signal bandwidth to center frequency, expressed by the formula: ffoc = 2(fH - fL) / (fH + fL), where fH and fL represent the upper and lower frequency limits, respectively. According to the definition of the U.S. Federal Communications Commission (FCC): when the antenna return loss is <-10dB, a relative bandwidth less than 1% is considered narrowband; a relative bandwidth between 1% and 25% is considered wideband; and a relative bandwidth greater than 25% is considered ultra-wideband (UWB).

[0062] In the first aspect, embodiments of this application provide a dual-polarized antenna 1000, which belongs to the field of communication technology and is mainly used in communication equipment.

[0063] like Figure 1 As shown, the dual-polarized antenna 1000 includes: a dielectric substrate 110, a parasitic unit 120 and a parasitic patch 130 respectively disposed on one side of the dielectric substrate 110, a radiating patch unit 140 including a first radiating patch 141, a second radiating patch 142 and a third radiating patch 143, and a first monopole radiating unit 161 and a second monopole radiating unit 162.

[0064] The first radiating patch 141, the second radiating patch 142, and the third radiating patch 143 are disposed on the same side of the dielectric substrate 110 along the circumferential direction of the parasitic unit 120. The first monopole radiating unit 161 and the second monopole radiating unit 162 are respectively disposed on the side of the dielectric substrate 110 away from the parasitic unit 120 and the parasitic patch 130. The first monopole radiating unit 161 is the feed line of the first port 151 of the antenna body 100, and the second monopole radiating unit 162 is the feed line of the second port 152 of the antenna body 100. The projections of the first monopole radiating unit 161, the parasitic unit 120, and the first radiating patch 141 on the same plane have overlapping portions, and the projections of the second monopole radiating unit 162, the second radiating patch 142, and the third radiating patch 143 on the same plane have overlapping portions.

[0065] Please refer to the above. Figures 3 to 5 Specifically, the dual-polarized antenna 1000 includes an antenna body 100 having a first port 151 and a second port 152. The antenna body 100 includes: a dielectric substrate 110, a parasitic element 120, a parasitic patch 130, a radiating patch element 140, a first monopole radiating element 161, and a second monopole radiating element 162. The parasitic element 120 and the parasitic patch 130 are respectively disposed on one side of the dielectric substrate 110.

[0066] The radiating patch unit 140 includes a first radiating patch 141, a second radiating patch 142, and a third radiating patch 143. The first radiating patch 141, the second radiating patch 142, and the third radiating patch 143 are disposed on the same side of the dielectric substrate 110 along the circumferential direction of the parasitic unit 120.

[0067] The first monopole radiating element 161 and the second monopole radiating element 162 are respectively disposed on the side of the dielectric substrate 110 away from the parasitic element and the parasitic patch. The first monopole radiating element 161 is the feed line of the first port 151 of the antenna body 100, and the second monopole radiating element 162 is the feed line of the second port 152 of the antenna body 100. The projections of the first monopole radiating element 161 onto the same plane overlap with those of the parasitic element 120 and the first radiating patch 141, respectively. The projections of the second monopole radiating element 162 onto the same plane overlap with those of the second radiating patch 142 and the third radiating patch 143, respectively.

[0068] In this embodiment, the length of the first monopole radiating unit 161 is approximately 1 / 4 wavelength of the corresponding high frequency. Its functions are: 1. To feed signals in, serving as the feed line for the first port 151 to achieve vertical polarization excitation. 2. As a radiating unit, it can independently excite high-frequency resonances to form... Figure 9 The monopole mode shown.

[0069] like Figure 6 As shown, the radiating patch unit 140 is a non-closed ring structure with three slits 145 along its circumference for impedance matching. This allows the radiating patch unit 140 to be divided into a first radiating patch 141, a second radiating patch 142, and a third radiating patch 143. The current flow of the radiating patch unit 140 with the slits 145 is equivalent to a closed loop. The first radiating patch 141 has an approximate open ring structure. The second radiating patch 142 and the third radiating patch 143 have approximate T-shaped structures.

[0070] The first radiating patch 141 corresponds to the low-frequency band, while the second radiating patch 142 and the third radiating patch 143 are coupled through the end of the first radiating patch 141 near the slot 145, resonating in the high-frequency band. Adjusting the position of the slot 145 allows switching between capacitive and inductive coupling modes for the first radiating patch 141 and the second and third radiating patches 142 and 143, thereby adjusting the overall input impedance and improving the impedance matching performance of the dual-polarized antenna 1000.

[0071] When the first port 151 is working, the first monopole radiating unit 161, coupled with the radiating patch unit 140, can be excited to produce two working modes, namely... Figure 7The ring mode shown forms the low-frequency band, and as... Figure 8 The groove pattern shown forms the mid-frequency band. The outer perimeter of the first radiating patch 141 corresponds to a wavelength in the low-frequency band.

[0072] It should be noted that, for example Figure 8 In the slot pattern shown, the current is mainly distributed inside the first radiating patch 141. The intermediate frequency resonant frequency is mainly determined by the width of the first radiating patch 141, and also affects the coupling between the first monopole radiating unit 161 and the radiating patch unit 140. By optimizing the width and outer perimeter of the first radiating patch 141, the resonant frequency can be made to fall within the intermediate and low frequencies.

[0073] The parasitic element 120, through capacitive coupling, can improve the overall impedance matching performance of the dual-polarized antenna 1000 and generate secondary radiation in the vertical polarization direction, forming an additional high-frequency resonance. The resonant frequency of this resonance is related to the side length of the parasitic element 120 by a quarter wavelength, forming a structure as shown below. Figure 10 The pattern shown is a rhomboid parasitic unit.

[0074] When the second port 152 is working, the second monopole radiating unit 162 couples with the radiating patch unit 140, which can excite two working modes, namely as follows: Figure 11 The T-shaped patch pattern shown forms the low-frequency band, and as... Figure 12 The slot coupling mode shown forms the mid-frequency band.

[0075] The second monopole radiating element 162, coupled with the second radiating patch 142 and the third radiating patch 143, can generate a resonance. The sum of the widths of the first radiating patch 141 and the second radiating patch 142 is half the corresponding low-frequency wavelength. By adjusting the distance between the second radiating patch 142 and the third radiating patch 143, the low-frequency radiation pattern of the dual-polarized antenna 1000 can be improved.

[0076] It should be noted that, for example Figure 12 In the slot coupling mode shown, the second radiating patch 142 and the third radiating patch 143 generate a secondary resonance by coupling the inner side of the first radiating patch 141. The current is mainly distributed on the inner side of the slot formed by the above three, and the length of the slot is approximately half the wavelength of the corresponding intermediate frequency band.

[0077] The parasitic patch 130, by coupling the energy of the first radiating patch 141 and the second radiating patch 142, excites a high-frequency resonance at the second port 152, forming a structure like... Figure 13 The rectangular parasitic patch 130 shown has an outer perimeter that is approximately 1 / 4 wavelength of the corresponding high frequency.

[0078] It is understood that the dual-polarized antenna 1000 provided in this embodiment can excite four resonant modes in the vertical polarization direction, namely: the loop mode in which the first port 151 operates in the low-frequency band ( Figure 7 ), the first port 151 operates in slot mode in the mid-frequency band ( Figure 8 The first port 151 operates in a high-frequency monopole mode. Figure 9 ) and the rhomboid parasitic unit pattern ( Figure 10 ).

[0079] Correspondingly, three resonant modes can be excited in the horizontal polarization direction, namely: the T-pattern mode in which the second port 152 operates in the low-frequency range ( Figure 11 The second port 152 operates in slot-coupled mode in the mid-frequency band. Figure 12 ) and the second port 152 operates in a rectangular parasitic patch mode at high frequencies (such as Figure 13 ).

[0080] Therefore, the broadband characteristics of the dual-polarized antenna 1000 are achieved through the aforementioned various resonant modes. Furthermore, the ultra-wideband characteristics achieved through multi-mode operation also exhibit better frequency selectivity.

[0081] like Figure 3 As shown, in some embodiments of this application, the antenna body 100 further includes a first bent stub 181 and a second bent stub 182. The first bent stub 181 and the second bent stub 182 are respectively connected to two opposite sides of the first radiating patch 141 near the parasitic unit 120, and the first bent stub 181 and the second bent stub 182 are arranged opposite to each other.

[0082] In this embodiment, the lengths of the first bent stub 181 and the second bent stub 182 are 1 / 4 wavelength of the corresponding high frequency. By setting the first bent stub 181 and the second bent stub 182, the current direction of the radiating patch unit 140 can be changed, thereby improving the high frequency cross-polarization ratio.

[0083] like Figure 14 and Figure 15 As shown, f1 is the curve of the dual-polarized antenna 1000 without the two bent stubs, and f2 is the curve of the dual-polarized antenna 1000 after the two bent stubs are loaded.

[0084] It is understandable that, such as Figure 14 As shown, when the dual-polarized antenna 1000 operates at 4.2 GHz, the cross-polarization in the horizontal plane (Phi = 0°) increases from 20 dB to 27 dB, effectively suppressing the cross-polarization ratio. Figure 15As shown, when the dual-polarized antenna 1000 operates at 4.2 GHz, the cross-polarization in the vertical plane (Phi = 90°) is improved by about 8 dB.

[0085] In addition, adding bent stubs can also improve the high-frequency isolation between the first port 151 and the second port 152, such as Figure 16 As shown, f1 is the curve before loading the bent stub, and f2 is the curve after loading two bent stubs. It can be seen that the overall isolation of the dual-polarized antenna is improved after loading, especially in the high-frequency band.

[0086] like Figure 3 As shown, in some embodiments of this application, a serpentine high-resistivity line 191 is connected between the second radiating patch 142 and the parasitic patch 130.

[0087] In this embodiment, the length of the serpentine high-resistivity line 191 is half the wavelength corresponding to the high frequency. Since the main radiating element of the second port 152 is the parasitic patch 130 when it operates at high frequency, its radiation pattern will be distorted and its directivity will deteriorate due to environmental influences. By loading the serpentine high-resistivity line 191 between the second radiating patch 142 and the second radiating patch 142, the current distribution of the parasitic patch 130 can be changed, thereby effectively improving the directivity of the high-frequency radiation pattern.

[0088] like Figure 17 and Figure 18 As shown, f3 is the curve of the dual-polarized antenna 1000 without the serpentine high-impedance line 191 loaded, and f4 is the curve of the dual-polarized antenna 1000 after the serpentine high-impedance line 191 is loaded.

[0089] When the dual-polarized antenna 1000 operates at 4.7 GHz, as shown in Figure 17, the directivity of the horizontal plane (Phi = 0°) radiation pattern from -90° to 0° is effectively improved. Figure 18 As shown, the directionality of the vertical plane (Phi = 90°) radiation pattern from 0° to 90° is effectively improved.

[0090] like Figure 4 As shown, the first monopole radiating element 161 can further be a three-order gradient structure, that is, the diameter of the first monopole radiating element 161 gradually increases along the direction close to the parasitic element 120, and the radiation impedance is gradually expanded from 50Ω to 377Ω. This can effectively alleviate the reduction in transmission efficiency caused by drastic impedance transformation, and the input impedance of the dual-polarized antenna 1000 can be adjusted to effectively expand the bandwidth.

[0091] like Figure 3 and Figure 5 As shown, in some embodiments of this application, the parasitic unit 120 is provided with a cross groove 121.

[0092] In this embodiment, when the conventional closed parasitic unit is located in the relative position of the first monopole radiating unit 161, it will affect the radiation performance of the first monopole radiating unit 161. However, in this embodiment, a cross slot 121 is embedded in the parasitic unit 120 to reduce the performance suppression of the first monopole radiating unit 161, thereby reducing the influence of the parasitic unit 120 on the radiation pattern of the first monopole radiating unit 161. At the same time, it will not affect the energy coupling between the first monopole radiating unit 161 and the parasitic unit 120. This can improve the overall omnidirectional radiation performance of the dual-polarized antenna 1000, thereby improving the anti-interference capability.

[0093] like Figure 3 As shown, in some embodiments of this application, the parasitic patch 130 has a groove 131.

[0094] In this embodiment, the second monopole radiating unit 162 is affected by the environment, and there will be a certain concave area in the radiation pattern. The parasitic patch 130 with groove 131 can effectively improve the non-circularity of the horizontal plane of the high frequency radiation pattern of the first port 151.

[0095] like Figure 3 As shown, in some embodiments of this application, a serrated structure 144 is formed on the inner side of the radiating patch unit 140, the serrated structure 144 including a plurality of protrusions and a plurality of recesses.

[0096] In this embodiment, a serrated structure 144 is formed on the inner side of the radiating patch unit 140. Specifically, a serrated structure is added to the inner sides of the first radiating patch 141, the second radiating patch 142, and the third radiating patch 143. Its function is to increase the current path on the inner surface of the radiating patch unit 140, thereby enabling... Figure 7 The resonant frequency excited by the ring mode shown is further down to a lower frequency, so as to reduce the size of the dual-polarized antenna 1000 and make the structure of the dual-polarized antenna 1000 more compact, thereby realizing the miniaturization of the dual-polarized antenna 1000.

[0097] like Figure 6 As shown, in some embodiments of this application, the first radiating patch 141 is provided with open-circuit branches 192 at both ends opposite to the second radiating patch 142, and the two open-circuit branches 192 are arranged opposite to each other.

[0098] In this embodiment, two open-circuit stubs 192 are added to both ends of the first radiating patch 141. The size of each open-circuit stub 192 is less than 1 / 8 wavelength. The open-circuit stub 192 is used to adjust the additional inductive reactance component generated by the feed input and the dual-polarized antenna 1000, which can optimize the directivity of the radiation pattern of the dual-polarized antenna 1000.

[0099] like Figure 5As shown, in some embodiments of this application, a plurality of strip slots 193 are embedded in the radiating patch unit 140, that is, strip slots 193 are respectively provided on the first radiating patch 141, the second radiating patch 142 and the third radiating patch 143. The setting of the strip slots 193 can improve the impedance matching performance of the dual-polarized antenna 1000 at high frequencies.

[0100] like Figure 1 , Figure 4 and Figure 5 As shown, in some embodiments of this application, the antenna body 100 may optionally include a first grounding unit 171 and a second grounding unit 172, which are disposed on the other side of the dielectric substrate 110.

[0101] The first grounding unit 171 is part of the power supply to the first port 151 of the antenna body 100, and the second grounding unit 172 is part of the power supply to the second port 152 of the antenna body 100. The first grounding unit 171 is connected to the first radiating patch 141, and the second grounding unit 172 is connected to the third radiating patch 143.

[0102] In this embodiment, as Figure 3 As shown, both the first radiating patch 141 and the third radiating patch 143 have metallized vias 111 to facilitate the connection of the first grounding unit 171 and the second grounding unit 172. The first grounding unit 171 serves as part of the power supply to the first port 151 of the antenna body 100 and is used to power the first radiating patch 141. The second grounding unit 172 serves as part of the power supply to the second port 152 of the antenna body 100 and is used to power the third radiating patch 143. That is, the dual-polarized antenna 1000 powers the radiating patch unit 140 through the first grounding unit 171 and the second grounding unit 172.

[0103] like Figure 4 As shown, the first grounding unit 171 has a notch on the side opposite to the first monopole radiating unit 161. The notch can improve the input impedance matching performance of the dual-polarized antenna 1000.

[0104] like Figures 2 to 4 As shown, in some embodiments of this application, the dual-polarized antenna 1000 may optionally include a reflector 200, which is disposed opposite to the side of the dielectric substrate 110 that is away from the radiating patch unit 140, and there is a gap between the dielectric substrate 110 and the antenna body 100.

[0105] In this embodiment, the reflector 200 is used to reflect the signal to focus the power in one direction, thereby increasing the gain and forming directional radiation. Figure 2As shown, there is a gap H between the dielectric substrate 110 and the antenna body 100. This gap H affects the phase synthesis of forward radiation, and thus affects the radiation performance and impedance characteristics of the dual-polarized antenna 1000. Therefore, by adjusting the gap H, the optimal directional radiation effect and impedance matching performance of the dual-polarized antenna 1000 can be achieved.

[0106] In addition, this application also proposes a communication device, including the dual-polarized antenna 1000 in any of the above embodiments. The communication device may be a wireless router, a set-top box, an optical access network device, etc.

[0107] The communication device provided in this application includes the aforementioned dual-polarized antenna 1000, and therefore has ultra-wideband characteristics and better frequency selectivity.

[0108] In summary, this application provides a dual-polarized antenna 1000, which is mainly used in communication equipment. It is a miniaturized, ultra-wideband, high isolation, low cross-polarization ratio, and stable directional radiation characteristics microstrip patch antenna.

[0109] Compared with traditional microstrip antennas, the dual-polarized antenna 1000 provided in this embodiment can achieve ultra-wideband characteristics by exciting orthogonal polarization on the dielectric substrate 110 in the effective space through the first monopole radiating unit 161 and the second monopole radiating unit 162, and exciting multiple resonant modes through the coupled radiating patch unit 140.

[0110] Meanwhile, it features high isolation and low cross-polarization ratio within the operating frequency band, as well as strong frequency selectivity, stable directional radiation characteristics, and strong anti-interference capability, thereby enhancing the market competitiveness of communication equipment.

[0111] Specifically, such as Figure 19 As shown, when the return loss (RL) < -10dB, in the curve for the first port 151, fH = 5.97GHz and fL = 2GHz, the relative bandwidth of the first port 151 is calculated to be 99.6% using ffoc = 2(fH - fL) / (fH + fL). Similarly, the relative bandwidth of the second port 152 can be calculated to be 93.4%. Figure 16 As shown in the figure, according to the f2 curve, the port isolation (ISO) is less than -22.5dB.

[0112] In the description of this specification, the references to terms such as "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 this application. 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.

[0113] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A dual-polarized antenna, comprising an antenna body, characterized in that, The antenna body includes: Dielectric substrate; Parasitic units and parasitic patches are respectively disposed on one side of the dielectric substrate; A radiating patch unit includes a first radiating patch, a second radiating patch, and a third radiating patch. The first, second, and third radiating patches are disposed on the same side of the dielectric substrate along the circumferential direction of the parasitic unit and the parasitic unit. The parasitic patch is located between the parasitic unit and the second and third radiating patches. The radiating patch unit is a non-closed annular structure with three slits along its circumferential direction to divide the radiating patch unit into the first, second, and third radiating patches. The current flow of the radiating patch unit with the slits is equivalent to a closed loop. The first radiating patch has an approximate open ring structure, and the second and third radiating patches have approximate T-shaped structures. The first monopole radiating element and the second monopole radiating element are respectively disposed on the side of the dielectric substrate away from the parasitic element and the parasitic patch. The first monopole radiating element is the feed line of the first port of the antenna body, and the second monopole radiating element is the feed line of the second port of the antenna body. The projections of the first monopole radiating element, the parasitic element, and the first radiating patch on the same plane have overlapping portions. The projections of the second monopole radiating element, the second radiating patch, and the third radiating patch on the same plane have overlapping portions.

2. The dual-polarized antenna according to claim 1, characterized in that, The antenna body further includes a first bent stub and a second bent stub, the first bent stub and the second bent stub being respectively connected to two opposite sides of the first radiating patch near the parasitic unit, and the first bent stub and the second bent stub being arranged opposite to each other.

3. The dual-polarized antenna according to claim 1, characterized in that, A serpentine high-resistivity wire connects the second radiating patch and the parasitic patch.

4. The dual-polarized antenna according to claim 1, characterized in that, The first radiating patch has open-circuit stubs at both ends opposite to the second radiating patch, and the two open-circuit stubs are arranged opposite each other.

5. The dual-polarized antenna according to claim 1, characterized in that, The parasitic unit has a cross-shaped groove.

6. The dual-polarized antenna according to claim 1, characterized in that, The parasitic patch has grooves.

7. The dual-polarized antenna according to claim 1, characterized in that, The inner side of the radiation patch unit has a serrated structure, which includes multiple protrusions and multiple recesses.

8. The dual-polarized antenna according to claim 1, characterized in that, The antenna body further includes a first grounding unit and a second grounding unit, which are disposed on the other side of the dielectric substrate. The first grounding unit is part of the first port feed of the antenna body, and the second grounding unit is part of the second port feed of the antenna body. The first grounding unit is connected to the first radiating patch, and the second grounding unit is connected to the third radiating patch.

9. The dual-polarized antenna according to any one of claims 1 to 8, characterized in that, The dual-polarized antenna also includes a reflector, which is disposed opposite to the side of the dielectric substrate that is away from the radiating patch unit, and there is a gap between the dielectric substrate and the antenna body.

10. A communication device, characterized in that, The dual-polarized antenna includes any one of claims 1 to 9.

Images