CN209709163U - A Double Loop Loaded Small Broadband Dual Polarized Crossed Dipole Antenna - Google Patents

Abstract

The utility model discloses a double-loop loaded small-sized broadband dual-polarization crossed dipole antenna, which comprises: a first substrate, a second substrate, a first ring-shaped patch, a second ring-shaped patch, a crossed dipole and a floor ; Wherein, the upper surface of the first substrate is provided with the first annular patch and the second annular patch, the lower surface of the first substrate is provided with crossed dipoles, and the bottom of the first substrate is provided with the second substrate , a floor is provided on the lower surface of the second substrate, the first substrate is parallel to the second substrate, the first annular patch, the second annular patch and the crossed dipole share an aperture and can be simultaneously excited by the feeding port; The utility model can ensure that the antenna maintains a low standing wave in the two frequency bands of Sub-6G while the antenna is miniaturized through the setting of the first ring-shaped patch, the second ring-shaped patch and the crossed dipole on the first substrate. Ratio, and has a stable radiation pattern and high radiation gain.

Description

A Double Loop Loaded Small Broadband Dual Polarized Crossed Dipole Antenna

technical field

The utility model relates to the field of wireless communication, in particular to a double-loop loaded small-sized broadband double-polarized cross dipole antenna.

Background technique

With the beginning of the deployment of the fifth generation mobile communication system, the base station antenna, which is an important link in the base station system, also needs to be upgraded. At present, most of the fifth-generation mobile communications use the two frequency bands of Sub-6G as the communication frequency bands deployed in the early stage. The base station antenna of this frequency band is very important.

Dual-polarized crossed dipoles are widely used in base station antenna design because of their good signal transmission and reception characteristics. Designing base station antennas on the basis of dual-polarized crossed dipoles will meet the ±45° polarity of base station antennas. requirements. In the process of designing the antenna, not only its parameter requirements, but also the size and complexity of the antenna should be minimized to reduce the deployment cost and production cost of the antenna, while improving the reliability of the antenna. In the process of antenna design, we often encounter problems such as unstable pattern, high profile due to expanded bandwidth, narrow bandwidth due to simplified structure, and high standing wave ratio, which are not suitable for micro base station applications where 5G is widely deployed.

Therefore, how to provide an antenna with a small standing wave ratio in the Sub-6G frequency band, a stable pattern, a simple structure and a small profile is an urgent problem to be solved today.

Utility model content

The purpose of this utility model is to provide a double-loop loaded small-scale broadband dual-polarization cross-dipole antenna, so that the miniaturized antenna can maintain two sub-6G frequency bands by using two ring-shaped patches and cross-dipole settings. Low VSWR with stable radiation pattern and high radiation gain.

In order to solve the above technical problems, the utility model provides a double-loop loaded small broadband dual-polarization crossed dipole antenna, including: a first substrate, a second substrate, a first ring-shaped patch, a second ring-shaped patch, a cross Dipoles and floors;

Wherein, the first annular patch and the second annular patch are arranged on the upper surface of the first substrate, and the crossed dipoles are arranged on the lower surface of the first substrate, so The second substrate is arranged below the first substrate, the floor is arranged on the lower surface of the second substrate, the first substrate is parallel to the second substrate, and the first ring-shaped patch , the second annular patch and the crossed dipole share an aperture and can be simultaneously excited by a feed port.

Optionally, the centers of the first ring-shaped patch and the second ring-shaped patch and the center of the crossed dipole and the second substrate are perpendicular to the first substrate and the intersection point is at on a straight line at the center of the first substrate.

Optionally, the length and width of the first substrate are both between 0.57λc and 0.71λc, and the length and width of the second substrate are both between 1.00λc and 1.28λc; where λc is the center frequency point at wavelength in free space.

Optionally, the materials of the first substrate and the second substrate are both FR4 materials with a relative permittivity of 4.40 and a loss tangent of 0.02, and the thicknesses of the first substrate and the second substrate are both at Between 1.20mm and 2.00mm.

Optionally, the distance between the first substrate and the second substrate is between 0.10λc and 0.19λc.

Optionally, the outer radius of the first annular patch is between 0.13λc and 0.20λc, and the width of the first annular patch is between 0.029λc and 0.086λc.

Optionally, the outer radius of the second annular patch is between 0.071λc and 0.114λc, and the width of the second annular patch is between 0.029λc and 0.071λc.

Optionally, the arm length of the crossed dipole is between 0.09λc and 0.14λc, and the width of the crossed dipole is between 0.001λc and 0.019λc.

The utility model provides a double-loop loaded small broadband dual-polarization crossed dipole antenna, including: a first substrate, a second substrate, a first ring patch, a second ring patch, a cross dipole and floor; wherein, the upper surface of the first substrate is provided with a first annular patch and a second annular patch, the lower surface of the first substrate is provided with crossed dipoles, and the lower surface of the first substrate is provided with a second A substrate, a floor is provided on the lower surface of the second substrate, the first substrate is parallel to the second substrate, the first ring patch, the second ring patch and the crossed dipole share the aperture and can be simultaneously excited by the feed port ;

It can be seen that, through the arrangement of the first ring-shaped patch, the second ring-shaped patch and the crossed dipoles on the first substrate, the utility model can pass the first ring-shaped patch, the second ring-shaped patch while the antenna is miniaturized. Simultaneous excitation of the patch and crossed dipoles ensures that the antenna maintains a low standing wave ratio in the 3.3GHz-3.6GHz and 4.8GHz-5.0GHz frequency bands of Sub-6G, and has a stable radiation direction in this frequency band figure and high radiation gain.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description It is only an embodiment of the utility model, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is the structural representation of a kind of double-loop loaded small-sized broadband dual-polarized crossed-dipole antenna provided by the embodiment of the utility model;

Fig. 2 is the top view of the patch of the dual-loop loaded small broadband dual-polarized cross-dipole antenna shown in Fig. 1;

Fig. 3 is the side view of the dual-loop loaded small-sized broadband dual-polarized crossed-dipole antenna shown in Fig. 1;

Fig. 4 is the VSWR and the gain diagram of the double-loop loaded small-sized broadband dual-polarization crossed dipole antenna shown in Fig. 1;

FIG. 5 is a radiation pattern diagram of the small broadband dual-polarized cross-dipole antenna loaded with double loops shown in FIG. 1 .

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a double-loop-loaded small broadband dual-polarized cross-dipole antenna provided by an embodiment of the present invention. The antenna may include: a first substrate 1, a second substrate 2, a first loop patch 3, a second loop patch 4, crossed dipoles 5 and a floor 6;

Wherein, the upper surface of the first substrate 1 is provided with a first annular patch 3 and the second annular patch 4, the lower surface of the first substrate 1 is provided with crossed dipoles 5, and the lower surface of the first substrate 1 is provided with The second substrate 2, a floor 6 is arranged on the lower surface of the second substrate 2, the first substrate 1 is parallel to the second substrate 2, the first annular patch 3, the second annular patch 4 and the crossed dipole 5 share the aperture And can be simultaneously excited by the feed port.

It can be understood that the purpose of this embodiment can be to make the first annular patch 3. The second annular patch 4 and the crossed dipole 5 share the aperture, and can be simultaneously excited by the feed port into three working modes, such as the first annular patch mode corresponding to the first annular patch 3, the second annular patch mode, and the second annular patch mode. The second annular patch mode corresponding to patch 4 and the crossed dipole mode corresponding to crossed dipole 5 expand the antenna bandwidth, so that when the three working modes are activated, the antenna can be kept low in the two frequency bands of Sub-6G Standing wave ratio, and has a stable radiation pattern and high radiation gain in this frequency band.

Specifically, for the specific position setting of the first annular patch 3, the second annular patch 4 and the crossed dipole 5 on the first substrate 1 in this embodiment, and the specific positions of the first substrate 1 and the second substrate 2 Position settings can be set by the designer according to practical scenarios and user needs. For example, in order to make the cross section of the antenna provided in this embodiment as small as possible, the center of circle of the first annular patch 3 and the second annular patch 4 can be set And the center of the crossed dipole 5 and the second substrate 2 is on a straight line perpendicular to the first substrate 1 and the intersection point is at the center of the first substrate 1, so as to maintain the antenna size and simplify the antenna structure while expanding the antenna bandwidth, further Realize the miniaturization of the antenna. As long as it can be ensured that the first loop patch 3 , the second loop patch 4 and the crossed dipole 5 in the antenna share an aperture and can be simultaneously excited by the feeding port, this embodiment does not impose any limitation on this.

Among them, the parameters such as the operating frequency, central operating frequency, and gain range in the operating frequency band of the antenna provided in this embodiment can be set by the designer. For example, the operating frequency of the antenna can be set between 3.28GHz and 5.27GHz, and the antenna The central working frequency of the antenna can be set to 4.285GHz, and the gain range of the working frequency band of the antenna can be set to 7.86dBi to 9.32dBi, which is not limited in this embodiment.

Specifically, the specific specification setting of the first substrate 1, the second substrate 2, the first annular patch 3, the second annular patch 4, and the crossed dipole 5 in this embodiment can be set by the designer himself, such as As shown in Figures 1 to 3, the material of the first substrate 1 and the second substrate 2 can be FR4 material with a relative permittivity of 4.40 and a loss tangent of 0.02, the thickness h of the first substrate ₁ and the second substrate The thickness h2 of ₂ can be between 1.20mm and 2.00mm, the length L1 and width W1 of the _{first substrate 1 can} both be between 0.57λc and 0.71λc, and the length L2 and width W1 of the second substrate _{2 2} can be between 1.00λc and 1.28λc, the distance H between the first substrate 1 and the second substrate 2 can be between 0.10λc and 0.19λc, and the outer radius R1 of the first annular patch ₃ can be 0.13λc Between 0.20λc and 0.20λc, the width W ₃ (the difference between the outer circle radius and the inner circle radius) of the first annular patch 3 can be between 0.029λc and 0.086λc, and the outer circle radius R ₂ of the second annular patch 4 can be Between 0.071λc and 0.114λc, the width W ₄ of the second annular patch 4 can be between 0.029λc and 0.071λc, the arm length L ₅ of the crossed dipole 5 is between 0.09λc and 0.14λc, the crossed dipole The width W ₅ of the pole 5 is between 0.001λc and 0.019λc; wherein, λc is the wavelength of the center frequency point in free space. For example, when λc is 70.10 mm, the length L ₁ of the first substrate 1 can be 40 mm to 50 mm, and the width W ₁ can be 40 mm to 50 mm; the length L ₂ of the second substrate 2 can be 70 mm to 90 mm, and the width W ₂ can be 70mm-90mm; the spacing H between the first substrate 1 and the second substrate 2 can be 7mm-13mm; the outer radius R ₁ of the first annular patch 3 can be 9mm-14mm, and the width W ₃ can be 2mm-6mm; The outer radius R2 of the _second annular patch ₄ can be 5mm-8mm, the width W4 can be 2mm-5mm; the arm length L5 of the crossed dipole ₅ can be 6mm-10mm, and the width W5 can be _0.70mm ~1.30mm.

It should be noted that, for the specific settings of the resonant frequencies of the three working modes (such as the first loop patch mode, the second loop patch mode and the crossed dipole mode) of the antenna in this embodiment, the designers can Setting, such as the resonant frequency of the first annular patch 3 working mode can be adjusted by parameters such as but not limited to the outer radius R1 and width W3 of the first annular patch 3 and the arm length L5 and width W5 of the dipole; The resonant frequency of the second annular patch 4 working mode can be adjusted by but not limited to parameters such as the outer circle radius R2 and the width W4 of the second annular patch 4; the resonant frequency of the crossed dipole 5 working mode can be adjusted by but not limited to The adjustment is limited to the parameters such as the length L5 and the width W5 of the dipole. This embodiment does not impose any limitation on this.

Specifically, as shown in FIG. 1 to FIG. 3 , the length L 1 of the first substrate 1 in the antenna is set to be L ₁ =45.00mm, and the width W ₁ =45.00mm, and the length L ₂ of the second substrate 2 =80.00mm, and the width W ₂ =80.00mm, the first substrate 1 and the second substrate 2 are both made of FR4 material with a relative permittivity of 4.40 and a loss tangent of 0.02, h ₁ =h2=1.60mm, spacing H=10.00mm, the first annular patch The outer circle radius R ₁ of 3 = 11.50 mm, the width W ₃ = 4.00 mm, the outer circle radius R ₂ of the second annular patch 4 = 6.50 mm, the width W ₄ = 3.50 mm, the arm length L of the crossed dipole 5 ₅ = 8.00mm, width W ₅ = 1.00mm, the voltage standing wave ratio (VSWR) and gain (Gain) diagram of the antenna can be shown in Figure 4, the center frequency is 4.275GHz, in the 3.28GHz ~ 5.27GHz frequency band The voltage standing wave ratio is less than 2, and the relative bandwidth is 46.54%, effectively covering the two frequency bands of Sub-6G. The gain is stable in the working frequency band, the lowest gain is 7.86dBi, and the highest gain is 9.32dBi; the radiation pattern of the antenna can be shown in Figure 5, and the solid line (Co.xoz_plane) in Figure 5 is the co-polarization direction of the xoz plane In the figure, the dashed line (Co.yoz_plane) is the co-polarization pattern of the yoz plane, the dotted line (X.xoz_plane) is the cross-polarization pattern of the xoz plane, and the dotted line (X.yoz_plane) is the cross-polarization pattern of the yoz plane direction map. The results show that no matter whether the antenna works in the first loop patch mode, the second loop patch mode or the dipole mode, it can always maintain a stable pattern and a wide 3dB beamwidth, that is, the antenna has good radiation characteristics .

In this embodiment, through the arrangement of the first annular patch 3, the second annular patch 4 and the crossed dipole 5 on the first substrate 1, the utility model can pass the first annular patch while the antenna is miniaturized. Simultaneous excitation of patch 3, second annular patch 4 and crossed dipole 5 ensures that the antenna maintains a low standing wave ratio in the two frequency bands of 3.3GHz-3.6GHz and 4.8GHz-5.0GHz in Sub-6G, and in There is a stable radiation pattern and high radiation gain in this frequency band.

In the accompanying drawings of the utility model embodiment, the same or similar symbols correspond to the same or similar parts; The orientation or positional relationship indicated by "right", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, It is constructed and operated in a specific orientation, so the terms describing the positional relationship in the drawings are for illustrative purposes only, and should not be construed as limitations on this patent. Those of ordinary skill in the art can understand the meaning of the above terms according to specific situations. Concrete meaning.

It should also be noted that in this specification, relative terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations There is no such actual relationship or order between the operations. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above is a detailed introduction of the dual-loop loaded small broadband dual-polarized cross-dipole antenna provided by the utility model. In this paper, specific examples are used to illustrate the principle and implementation of the present utility model, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, and these improvements and modifications also fall into the protection of the claims of the utility model. within range.

Claims (8)

1. A double-ring loaded small-sized broadband dual-polarization crossed dipole antenna, characterized in that, comprising: a first substrate, a second substrate, a first annular patch, a second annular patch, a crossed dipole and a floor; Wherein, the first annular patch and the second annular patch are arranged on the upper surface of the first substrate, the crossed dipoles are arranged on the lower surface of the first substrate, and the first annular patch is arranged on the lower surface of the first substrate. The second substrate is arranged under a substrate, the floor is arranged on the lower surface of the second substrate, the first substrate is parallel to the second substrate, the first annular patch, the The second annular patch shares an aperture with the crossed dipole and can be simultaneously excited by the feed port. 2. The double-loop loaded small-sized broadband dual-polarized crossed dipole antenna according to claim 1, wherein the center of circle of the first annular patch and the second annular patch and the crossed dipole The center of the second substrate is on a straight line perpendicular to the first substrate and the intersection point is at the center of the first substrate. 3. The double-loop loaded small-sized broadband dual-polarization crossed dipole antenna according to claim 1, wherein the length and width of the first substrate are between 0.57λc and 0.71λc, and the second substrate The length and width of are both between 1.00λc and 1.28λc; where λc is the wavelength of the center frequency point in free space. 4. The double-loop loaded small-sized broadband dual-polarization crossed dipole antenna according to claim 1, wherein the materials of the first substrate and the second substrate are relative permittivity of 4.40 and loss angle For an FR4 material with a tangent of 0.02, the thicknesses of the first substrate and the second substrate are both between 1.20mm and 2.00mm. 5 . The double-loop loaded small broadband dual-polarized cross-dipole antenna according to claim 1 , wherein the distance between the first substrate and the second substrate is between 0.10λc and 0.19λc. 6. The double-loop loaded small-sized broadband dual-polarized cross-dipole antenna according to claim 1, wherein the outer circle radius of the first annular patch is between 0.13λc and 0.20λc, and the first The width of the annular patch is between 0.029λc and 0.086λc. 7. The dual-loop loaded small-sized broadband dual-polarized cross-dipole antenna according to claim 1, wherein the outer circle radius of the second annular patch is between 0.071λc and 0.114λc, and the second The width of the annular patch is between 0.029λc and 0.071λc. 8. The double-loop loaded small-sized broadband dual-polarized crossed dipole antenna according to claim 1, wherein the arm length of the crossed dipole is between 0.09λc and 0.14λc, and the crossed dipole The width is between 0.001λc and 0.019λc.