CN210957001U - Radiation patch and dual-polarized antenna - Google Patents

Abstract

The utility model relates to the technical field of, a radiation paster and dual polarized antenna is provided, above-mentioned radiation paster include the paster body and connect in each other orthogonally in first microstrip feeder and second microstrip feeder on the paster body, the paster body in first microstrip feeder with set up the gap between the second microstrip feeder, the one end in gap runs through the edge of paster body has higher isolation between the first microstrip feeder of above-mentioned radiation paster and the second microstrip feeder, effectively simplifies dual polarized antenna's structure, reduces dual polarized antenna's processing cost, and simultaneously, the paster body is connected with the feed port through first microstrip feeder and second microstrip feeder, effectively avoids the feed structure to cause the influence to dual polarized antenna's directional diagram.

Description

Radiation patch and dual-polarized antenna

Technical Field

The utility model relates to a communication equipment technical field especially provides a radiation patch and dual polarized antenna.

Background

In current high-capacity and high-rate communication, a MIMO (Multiple-Input Multiple-Output) system can effectively utilize multipath signals and multiply the channel capacity. In order to reduce the correlation between the signals received by the antennas, the MIMO system needs to increase the distance between the antennas, which will certainly increase the occupied space of the antennas.

The dual-polarized antenna adopts two orthogonal polarization modes and can replace a dual-antenna structure in an MIMO system, so that the space between the dual antennas is saved, and simultaneously, the same radiation unit can be used for generating two polarizations. However, since two polarizations have strict requirements on isolation, how to improve the isolation between the two polarization feed ports is a difficult point of dual-polarized antennas.

At present, there are various methods commonly used for improving the isolation between two polarization feed ports of a dual-polarization antenna, such as adopting different feed structure modes, adopting a differential feed mode, adopting a multilayer board mode, etc., but all the above modes can cause the structure of the dual-polarization antenna to be too complex, and increase the processing cost of the dual-polarization antenna.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a radiation patch and dual polarized antenna aims at solving how to realize when improving the isolation between dual polarized antenna bipolarization feed port, simplifies dual polarized antenna's structure, reduces dual polarized antenna's processing cost's technical problem.

In order to achieve the above object, the utility model adopts the following technical scheme: a radiation patch comprises a patch body, a first microstrip feeder line and a second microstrip feeder line which are mutually orthogonally connected to the patch body, wherein a gap is formed between the first microstrip feeder line and the second microstrip feeder line of the patch body, and one end of the gap penetrates through the edge of the patch body.

The utility model provides a radiation paster has following beneficial effect at least: the patch body is provided with the gap between the first microstrip feeder line and the second microstrip feeder line, one end of the gap penetrates through the edge of the patch body to effectively separate the first microstrip feeder line from the second microstrip feeder line, so that the isolation between the first microstrip feeder line and the second microstrip feeder line is effectively improved, the structure of the dual-polarized antenna is effectively simplified, the processing cost of the dual-polarized antenna is reduced, and meanwhile, the patch body is connected with the feed port through the first microstrip feeder line and the second microstrip feeder line, so that the directional diagram of the dual-polarized antenna is effectively prevented from being influenced by the feed structure.

In one embodiment, the patch body has a square structure, the patch body has a first feeding edge and a second feeding edge which are adjacent to each other, the first microstrip feed line is connected to the first feeding edge, and the second microstrip feed line is connected to the second feeding edge.

In one embodiment, the slot is an elongated structure, and the slot and the first feeding edge or the second feeding edge are joined to each other at an included angle.

In one embodiment, the angle between the slot and the first feeding edge or the second feeding edge is 15-25 °.

In one embodiment, the width of the gap is 0.016 λ -0.04 λ, where λ is the operating wavelength at the center of the radiation patch radiation frequency.

In one embodiment, the length of the slot is 0.144 λ -0.224 λ, where λ is the operating wavelength at the center of the radiation patch radiation frequency.

In one embodiment, the slot has an L-shaped structure, and one end of the slot is connected to the first feeding edge or the second feeding edge.

In one embodiment, the first microstrip feed line is connected to a midpoint position of the first feed edge, and the second microstrip feed line is connected to a midpoint position of the second feed edge.

In order to achieve the above object, the utility model provides a dual polarized antenna still, include from bottom to top and stack gradually dielectric substrate, ground plate and above-mentioned radiation paster, dielectric substrate is equipped with first feed port and second feed port, the first microstrip feeder of radiation paster passes behind the ground plate with just first feed port is connected second microstrip feeder passes behind the ground plate with second feed port is connected.

According to the dual-polarized antenna, the gap is formed between the first microstrip feeder line and the second microstrip feeder line through the patch body for radiating the patch, one end of the gap penetrates through the edge of the patch body, so that the first microstrip feeder line and the second microstrip feeder line are effectively separated, the isolation between the first microstrip feeder line and the second microstrip feeder line is effectively improved, the isolation between two polarization feed ports of the dual-polarized antenna is effectively improved, meanwhile, the structure of the dual-polarized antenna is effectively simplified, and the processing cost of the dual-polarized antenna is reduced.

In one embodiment, an air dielectric layer is disposed between the radiation patch and the ground plate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a radiation patch according to an embodiment of the present invention;

fig. 2 is a right side view of the radiation patch of fig. 1;

fig. 3 is a schematic structural diagram of a radiation patch according to another embodiment of the present invention;

fig. 4 is a schematic structural diagram of a dual-polarized antenna provided in an embodiment of the present invention;

fig. 5 is a diagram of measured return loss values of the first feed port and the second feed port of the dual-polarized antenna provided by the embodiment of the present invention;

fig. 6 is a diagram of measured values of isolation between the first feed port and the second feed port of the dual-polarized antenna provided in the embodiment of the present invention;

fig. 7 is an E-plane radiation pattern when the dual-polarized antenna provided by the embodiment of the present invention excites the first feeding port and the second feeding port is connected to a 50 ohm matching load;

fig. 8 is an H-plane radiation pattern when the dual-polarized antenna provided by the embodiment of the present invention excites the first feeding port and the second feeding port is connected to a 50 ohm matching load;

fig. 9 is an E-plane radiation pattern when the dual-polarized antenna provided by the embodiment of the present invention excites the second feeding port and the first feeding port is connected to a 50 ohm matching load;

fig. 10 is an H-plane radiation pattern when the dual-polarized antenna provided by the embodiment of the present invention excites the second feeding port and the first feeding port is connected to a 50 ohm matching load.

Wherein, in the figures, the respective reference numerals:

10. the antenna comprises a radiation patch 11, a patch body 111, a slot 112, a first feed edge 113, a second feed edge 12, a first microstrip feed line 13, a second microstrip feed line 20, a ground plate 30, a dielectric substrate 31, a first feed port 32, a second feed port 40 and an air dielectric layer.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating 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 the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1 to 2, a radiation patch 10 includes a patch body 11, and a first microstrip feed line 12 and a second microstrip feed line 13 orthogonally connected to the patch body 11, where the patch body 11 has a slot 111 between the first microstrip feed line 12 and the second microstrip feed line 13, and one end of the slot 111 penetrates through an edge of the patch body 11.

The radiation patch 10 effectively improves the isolation between the first microstrip feed line 12 and the second microstrip feed line 13 by arranging the slot 111 between the first microstrip feed line 12 and the second microstrip feed line 13 on the patch body 11 and enabling one end of the slot 111 to penetrate through the edge of the patch body 11 so as to effectively separate the first microstrip feed line 12 from the second microstrip feed line 13, thereby effectively simplifying the structure of the dual-polarization antenna and reducing the processing cost of the dual-polarization antenna, and meanwhile, the patch body 11 is connected with the feed port through the first microstrip feed line 12 and the second microstrip feed line 13 so as to effectively avoid the influence of the feed structure on the directional diagram of the dual-polarization antenna.

Wherein, the first microstrip feed line 12 is used for connecting the first feed port 31 of the dual-polarized antenna, and the second microstrip feed line 13 is used for connecting the second feed port 32 of the dual-polarized antenna.

Specifically, the widths of the first microstrip feed line 12 and the second microstrip feed line 13 may be selected to be 3.4mm, and of course, the widths of the first microstrip feed line 12 and the second microstrip feed line 13 may be adjusted according to actual needs, and impedance matching of the dual-polarized antenna may be achieved by adjusting the widths of the first microstrip feed line 12 and the second microstrip feed line 13.

In an embodiment, please refer to fig. 1, the patch body 11 has a square structure, the patch body 11 has a first feeding edge 112 and a second feeding edge 113 adjacent to each other, the first microstrip feeding line 12 is connected to the first feeding edge 112, and the second microstrip feeding line 13 is connected to the second feeding edge 113.

Specifically, the length of the patch body 11 may be 55mm and the width may be 52mm, and of course, the length and the width of the patch body 11 may also be adjusted according to actual needs, and are not limited specifically herein.

Of course, the patch body 11 may have various shapes, such as regular hexagon, regular octagon, and other axisymmetric shapes, and is not limited herein.

Further, as shown in fig. 1, the slot 111 is a long strip structure, and the slot 111 is joined to the first feeding edge 112 or the second feeding edge 113 at an angle.

Specifically, the slot 111 is angled at 15-25 ° to the first or second feeding edge 112, 113.

Specifically, the width of the slot 111 is 0.016 λ -0.04 λ, where λ is the operating wavelength at the center of the radiation patch radiation frequency.

Specifically, the length of the slot 111 is 0.144 λ -0.224 λ, where λ is the operating wavelength at the center point of the radiation patch radiation frequency.

In particular, the perpendicular distance of the junction to the second microstrip feed line 13 is 4mm-6mm when the slot 111 is joined to the first feed edge 112, or 4mm-6mm when the slot 111 is joined to the second feed edge 113.

In fig. 1, θ is an angle formed by the slot 111 and the first feeding edge 112; w is the width of the slot 111; l is the length of the slot 111 and d is the perpendicular distance from the second feeding edge 113 at the junction of the slot 111 and the first feeding edge 112.

The isolation of the first microstrip feeder line 12 and the second microstrip feeder line 13 can be adjusted by changing the values of the angle theta, the width W, the length L and the vertical distance d, so that the dual-polarized antenna can meet different use requirements, and meanwhile, the resonant frequency of the first feed port and the second feed port of the dual-polarized antenna can be adjusted by changing the values of the sizes of the radiation patch 10, so that the dual-polarized antenna can work in any frequency band, and good impedance matching of the dual-polarized antenna can be realized.

Taking the angle θ as 20 °, the width W as 0.024 λ, the length L as 0.1792 λ, and the vertical distance d as 5mm as an example, please refer to fig. 5 and 6, fig. 5 shows the measured values of the return loss of the first feeding port and the second feeding port of the dual-polarized antenna (i.e., the input return loss S11 and the output return loss S22) when the radiation patch 10 adopts the above-mentioned various size values, and fig. 6 shows the measured values of the isolation of the first feeding port and the second feeding port of the dual-polarized antenna (i.e., the inverse transmission coefficient S12) when the radiation patch 10 adopts the above-mentioned various size values. As can be seen from the figure, the resonance frequency bands of the first feed port and the second feed port are both around 2.45GHz, wherein the-10 dB return loss bandwidth range of the first feed port is 2.37-2.56 GHz, the-10 dB return loss bandwidth range of the second feed port is 2.37-2.53 GHz, and in the working frequency band, the isolation between the first feed port and the second feed port, namely the isolation between the first microstrip feed line 12 and the second microstrip feed line 13 is more than 26dB, so that high isolation is effectively realized.

It should be noted that the radiation patch 10 can adopt any value within the above-mentioned range of values of the dimensions, such as an angle θ of 15 °, a width W of 0.016 λ, a length L of 0.144 λ, and a vertical distance d of 4mm, or such as an angle θ of 25 °, a width W of 0.04 λ, a length L of 0.224 λ, and a vertical distance d of 6 mm.

In addition, the isolation curve in fig. 5 can be shifted to a high resonant frequency by increasing the values of the angle θ, the width W and the vertical distance d, but the resonant frequency of the input return loss S11 curve and the output return loss S22 curve in fig. 5 is not substantially affected, and the resonant frequency of the isolation curve in fig. 6 and the resonant frequency of the input return loss S11 curve in fig. 5 is simultaneously adjusted by adjusting the value of the length L, but the resonant frequency of the output return loss S22 curve in fig. 5 is not substantially affected.

Further, as shown in fig. 1, the first microstrip feed line 12 is connected to the midpoint of the first feeding edge 112, and the second microstrip feed line 13 is connected to the midpoint of the second feeding edge 113. With the above arrangement, the connection stability of the patch 10 can be effectively radiated.

In another embodiment, as shown in fig. 3, the slot 111 has an L-shaped structure, and one end of the slot 111 is connected to the first feeding edge 112 or the second feeding edge 113.

In another embodiment, first microstrip feed line 12 and second microstrip feed line 13 are connected orthogonally to each other to the surface of patch body 11.

Referring to fig. 4, a dual-polarized antenna includes a dielectric substrate 30, a ground plate 20 and the radiation patch 10 stacked in sequence from bottom to top, the dielectric substrate 30 has a first feed port 31 and a second feed port 32, a first microstrip feed line 12 of the radiation patch 10 passes through the ground plate 20 and then is connected to the first feed port 31, and a second microstrip feed line 13 passes through the ground plate 20 and then is connected to the second feed port 32.

According to the dual-polarized antenna, the slot 111 is formed in the position, between the first microstrip feeder line 12 and the second microstrip feeder line 13, of the patch body 11 of the radiation patch 10, one end of the slot 111 penetrates through the edge of the patch body 11, so that the first microstrip feeder line 12 and the second microstrip feeder line 13 are effectively separated, the isolation between the first microstrip feeder line 12 and the second microstrip feeder line 13 is effectively improved, the isolation between two polarization feed ports of the dual-polarized antenna is effectively improved, meanwhile, the structure of the dual-polarized antenna is effectively simplified, and the processing cost of the dual-polarized antenna is reduced.

The dielectric substrate 30 can be a single-layer FR4 dielectric substrate, the length can be 70mm, the width can be 118mm, the thickness can be 1.6mm, the dielectric constant can be 4.4, the loss tangent can be 0.02, and the distance between the radiation patch 10 and the dielectric substrate 30 can be 7 mm.

Of course, the type, size, and other parameters of the dielectric substrate 30 can be adjusted according to actual needs, and are not specifically limited herein.

In one embodiment, with continued reference to fig. 4, an air dielectric layer 40 is disposed between the radiating patch 10 and the ground plate 20. By arranging the air dielectric layer 40, the bandwidth of the dual-polarized antenna can be effectively increased.

Referring to fig. 7 and 8, when the first feeding port 31 is excited and the second feeding port 32 is connected to a 50 ohm matched load, the polarization of the dual-polarized antenna is horizontal polarization, and has high directional radiation characteristic, the maximum gain is 7.29dB, and the cross polarization in the main radiation direction is greater than 14.5 dB. The front-to-back ratio of the dual-polarized antenna is larger than 17.1dB, and the front-to-back ratio of the antenna can also be improved by increasing the size of the ground plate 20.

As shown in fig. 9 and 10, when the second feeding port 32 is excited and the first feeding port 31 is connected to a 50-ohm matched load, the polarization of the dual-polarized antenna is vertical polarization, the maximum gain is 8.28dB, the cross polarization in the main radiation direction is greater than 16.3dB, and the dual-polarized antenna has high directional radiation characteristics. The front-to-back ratio of the dual-polarized antenna is greater than 18.6dB, and the front-to-back ratio of the antenna can also be improved by increasing the size of the ground plate 20.

Comparing the radiation pattern shown in fig. 7 and 8 with the radiation pattern shown in fig. 9 and 10, the gain for exciting the first feed port 31 and the gain for exciting the second feed port 32 are different by about 1dB, and by changing the size of the ground plate 20 to make the ground plate 20 have a substantially square structure, the directionality of the horizontal polarization of the dual-polarized antenna can be improved, and the maximum gains of the horizontal polarization and the vertical polarization of the dual-polarized antenna can be kept consistent.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A radiation patch characterized by: the patch comprises a patch body, a first microstrip feeder line and a second microstrip feeder line, wherein the first microstrip feeder line and the second microstrip feeder line are connected to the patch body in an orthogonal mode, a gap is formed between the first microstrip feeder line and the second microstrip feeder line of the patch body, and one end of the gap penetrates through the edge of the patch body.

2. The radiating patch of claim 1, wherein: the patch body is of a square structure and is provided with a first feed edge and a second feed edge which are adjacent, the first microstrip feed line is connected to the first feed edge, and the second microstrip feed line is connected to the second feed edge.

3. The radiating patch of claim 2, wherein: the slot is of a long strip-shaped structure, and the slot is jointed with the first feeding edge or the second feeding edge in an included angle mode.

4. The radiating patch of claim 3, wherein: the included angle formed by the gap and the first feeding edge or the second feeding edge is 15-25 degrees.

5. The radiating patch of claim 3, wherein: the width of the gap is 0.016 lambda-0.04 lambda, wherein lambda is the working wavelength of the central point of the radiation frequency of the radiation patch.

6. The radiating patch of claim 3, wherein: the length of the gap is 0.144 lambda-0.224 lambda, wherein lambda is the working wavelength of the central point of the radiation frequency of the radiation patch.

7. The radiating patch of claim 2, wherein: the slot is of an L-shaped structure, and one end of the slot is jointed with the first feeding edge or the second feeding edge.

8. The radiating patch according to any one of claims 2-7, wherein: the first microstrip feed line is connected to the midpoint position of the first feed edge, and the second microstrip feed line is connected to the midpoint position of the second feed edge.

9. A dual polarized antenna, characterized by: the antenna comprises a dielectric substrate, a ground plate and the radiation patch as claimed in any one of claims 1 to 8, which are sequentially stacked from bottom to top, wherein the dielectric substrate is provided with a first feed port and a second feed port, a first microstrip feed line of the radiation patch penetrates through the ground plate and then is connected with the first feed port, and a second microstrip feed line penetrates through the ground plate and then is connected with the second feed port.

10. The dual polarized antenna of claim 9, wherein: an air dielectric layer is arranged between the radiation patch and the grounding plate.

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