CN206727219U - A kind of circular polarised array antenna and communication equipment - Google Patents

Abstract

The utility model discloses a circularly polarized array antenna and communication equipment. Each ellipse patch in the ellipse patch array in the antenna is connected to each output port of a feed network through each first microstrip line to realize parallel feed Electricity, elliptical patch array and feed network are placed on the upper surface of the PCB board, the floor is placed on the lower surface of the PCB board, the floor has elliptical slots and rectangular patches, and each elliptical slot and each rectangular patch is a group with An elliptical patch corresponds. There is a circular gap between the elliptical slot and the elliptical patch, thereby forming capacitive loading, and coupling and short circuit between the elliptical patch and the rectangular patch, thereby forming inductive loading. On this basis, the projection angles between the long axis of the elliptical patch and the long axis of the elliptical slot and the first microstrip line are both 45 degrees, so as to realize circularly polarized radiation in the working frequency band. Since the cross-sections of the elliptical patch and the first microstrip line are relatively low and occupy a small volume, the miniaturization and low-profile design of the antenna can be realized on the basis of circular polarization.

Description

A circularly polarized array antenna and communication equipment

technical field

The utility model relates to the field of radio frequency technology, in particular to a circularly polarized array antenna and communication equipment.

Background technique

With the development of modern communication technology, it is difficult to simply linearly polarize the antenna to meet the communication requirements. On the basis of linear polarization, circular polarization is generated. Circularly polarized antennas can receive incoming waves of any polarization mode, and their radiated waves can also be received by antennas of any polarization mode. They have the advantages of rotation orthogonality, ability to suppress cloud and rain interference, and anti-multipath reflection.

Microstrip circularly polarized antennas combine the advantages of both microstrip antennas and circularly polarized antennas. With their good electromagnetic properties, they are widely used in wireless applications, such as: measurement, communication, satellite, aerospace, global positioning system and RFID systems Satellite communication, remote control, telemetry technology. However, in actual implementation, circularly polarized antennas are usually bulky, have a high profile, are relatively heavy, and are not easy to assemble and carry.

It can be seen that how to realize the circular polarization, miniaturization and low-profile design of the antenna is an urgent problem to be solved by people in the field of communication equipment.

Utility model content

The purpose of the utility model is to provide a circular polarization array antenna and communication equipment for realizing circular polarization, miniaturization and low profile design.

In order to solve the above technical problems, the utility model provides a circularly polarized array antenna, including an elliptical patch array, a feed network connected to the elliptical patch array, a PCB board and a floor;

The elliptical patch array includes an elliptical patch and a first microstrip line connected to the elliptical patch, and each of the first microstrip lines is connected to the feed network through parallel feeding, and the elliptical The patch array and the feed network are placed on the upper surface of the PCB, the floor is placed on the lower surface of the PCB, the floor has an elliptical groove and a rectangular patch, and each of the elliptical grooves and Each of the rectangular patches is a group corresponding to the elliptical patch, there is a circular seam between the elliptical groove and the elliptical patch, and the rectangular patch has an overlapping portion with the elliptical groove and is connected to the elliptical patch. The coupling short circuit between the elliptical patches, the major axis of the elliptical patch and the major axis of the elliptical slot and the projected angle of the first microstrip line are both 45 degrees;

Wherein, the number of the elliptical patch and the first microstrip line is 2 ⁿ , and n is a positive integer.

Preferably, n is 2, and the four elliptical patches of the elliptical patch array are sequentially the first elliptical patch, the second elliptical patch, the third elliptical patch and the fourth elliptical patch, and the fourth elliptical patch The distance between an elliptical patch and the second elliptical patch, the distance between the third elliptical patch and the fourth elliptical patch are the same, and are larger than the distance between the second elliptical patch and the third elliptical patch. The spacing of the elliptical patches;

Correspondingly, the four elliptical grooves are sequentially the first elliptical groove, the second elliptical groove, the third elliptical groove and the fourth elliptical groove, the distance between the first elliptical groove and the second elliptical groove, the The distance between the third oval groove and the fourth oval groove is the same and greater than the distance between the second oval groove and the third oval groove, and the second oval groove communicates with the third oval groove.

Preferably, the major axis of the elliptical patch is 0.34 times the wavelength corresponding to the operating frequency of the antenna, the ratio of the major axis to the minor axis is 1.0438, and the ratio of the major axis to the minor axis of the elliptical slot is also 1.0438;

Wherein, the working frequency of the antenna is 5.8GHz, ISM frequency band.

Preferably, the distance between the first elliptical patch and the second elliptical patch, the distance between the third elliptical patch and the fourth elliptical patch are two times the wavelength corresponding to the operating frequency of the antenna. one-third.

Preferably, the feed network includes at least one type of microstrip line and a T-type converter connected to the microstrip line.

Preferably, the feed network specifically includes a second microstrip line with an impedance of 50 ohms, a third microstrip line with an impedance of 70.71 ohms, a fourth microstrip line with an impedance of 100 ohms, and three T-type switches device;

Wherein, 4 described second microstrip lines are respectively connected with 4 described first microstrip lines, then are connected with 4 described third microstrip lines, and 4 described third microstrip lines are connected with 4 described third microstrip lines The fourth microstrip line is connected, and the four fourth microstrip lines are connected in pairs through the first T-type converter and the second T-type converter, and the first T-type converter and the second T-type converter Type converters are connected to the second microstrip line in turn, the third microstrip line is connected to the fourth microstrip line and then connected through a third T-type converter, and the third T-type converter is connected to the fourth microstrip line. The second microstrip line is connected as a single-point feed interface;

Wherein, n is 2, and the impedance of the first microstrip line is 50 ohms.

Preferably, the PCB board is a rectangular single-layer double-sided PCB board with a relative permittivity of 4.4, a tangent loss of 0.02, and a thickness of 1mm.

Preferably, the thickness of the double-sided copper-clad laminates of the PCB is 35 μm.

Preferably, the distance between the first ellipse patch and the second ellipse patch, the distance between the third ellipse patch and the fourth ellipse patch are all 25 mm, and the distance between the second ellipse patch and the fourth ellipse patch is 25 mm. The distance between the third elliptical patch is 19mm, the rectangular patch is 15mm long and 1.85mm wide, and the horizontal distance between the side of the rectangular patch close to the center of the elliptical groove and the center of the circle is 6.12mm, The vertical distance between the bottom edge of the rectangular patch and the center of the circle is 0.2mm;

The distance between the first oval groove and the second oval groove, the distance between the third oval groove and the fourth oval groove is 25mm, the distance between the second oval groove and the third oval groove is 19mm;

Wherein, the wavelength corresponding to the operating frequency of the antenna is 50 mm.

In order to solve the above technical problems, the utility model also provides a communication device, including the circularly polarized array antenna.

In the circularly polarized array antenna provided by the utility model, each elliptical patch in the elliptical patch array is fed in parallel with the feed network through each first microstrip line, and the elliptical patch array and the feed network are placed on the PCB board. On the upper surface, the floor is placed on the lower surface of the PCB board. The floor has elliptical grooves and rectangular patches, and each elliptical groove and each rectangular patch corresponds to an elliptical patch. There is a ring seam between the elliptical slot and the elliptical patch, which constitutes capacitive loading, while the coupling short circuit between the elliptical patch and the rectangular patch constitutes inductive loading. On this basis, the long axis of the elliptical patch and the length of the elliptical slot The projection angles between the long axis and the first microstrip line are both 45 degrees, so as to realize circularly polarized radiation in the working frequency band. Since the profiles of the elliptical patch and the first microstrip line are low, the thickness is small, and the volume occupied is small, the miniaturization and low-profile design of the antenna can be realized on the basis of circular polarization, and the antenna The cost is low, easy to integrate, and can be widely used in the field of wireless communication.

In addition, the utility model also provides a communication device including the above-mentioned antenna, which also has the above-mentioned beneficial effects.

Description of drawings

In order to illustrate the embodiment of the utility model more clearly, the accompanying drawings that need to be used in the embodiment will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the utility model. For those skilled in the art Ordinary technicians can also obtain other drawings based on these drawings on the premise of not paying creative work.

Fig. 1 is a structural diagram of a circularly polarized array antenna provided by an embodiment of the present invention;

Fig. 2 is a structural diagram of an elliptical patch array provided by an embodiment of the present invention;

FIG. 3 is a structural diagram of a feed network provided by an embodiment of the present invention;

Fig. 4 is a structural diagram of a floor provided by the embodiment of the present invention;

Fig. 5 is a return loss diagram of a circularly polarized array antenna provided by an embodiment of the present invention;

Fig. 6 is an electromagnetic simulation axial ratio curve diagram of a circularly polarized array antenna provided by an embodiment of the present invention;

The reference signs are as follows: 1 is the elliptical patch array, 2 is the feed network, 3 is the PCB board, 4 is the floor, 12 is the first microstrip line, 111 is the first elliptical patch, 112 is the second elliptical patch , 113 is the third oval patch, 114 is the fourth oval patch, 411 is the first oval groove, 412 is the second oval groove, 413 is the third oval groove, 413, 414 is the fourth oval groove, O is the center of the circle, 21 is the second microstrip line, 22 is the third microstrip line 22, 23 is the fourth microstrip line, 241 is the first T-type converter, 242 is the second T-type converter, 243 is the third T-type conversion Device, 42 is a rectangular patch.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. . 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 protection scope of the present utility model.

The core of the utility model is to provide a circular polarization array antenna and communication equipment for realizing circular polarization, miniaturization and low profile design.

In order to enable those skilled in the art to better understand the solution of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

FIG. 1 is a structural diagram of a circularly polarized array antenna provided by an embodiment of the present invention. Fig. 2 is a structural diagram of an elliptical patch array provided by an embodiment of the present invention. Fig. 3 is a structural diagram of a feeding network provided by an embodiment of the utility model. Fig. 4 is a structural diagram of a floor provided by the embodiment of the present invention. It should be noted that in FIG. 1 , four elliptical patches and first microstrip lines are taken as an example for illustration. As shown in FIG. 1 , the antenna includes an elliptical patch array 1 , a feed network 2 connected to the elliptical patch array 1 , a PCB board 3 and a floor 4 .

The elliptical patch array 1 includes an elliptical patch and a first microstrip line 12 connected to the elliptical patch, and each first microstrip line 12 is connected to the feed network 2 through a parallel feeding mode, and the elliptical patch array 1 and the feeder The electrical network 2 is placed on the upper surface of the PCB 3, the floor 4 is placed on the lower surface of the PCB 3, the floor 4 has an elliptical groove and a rectangular patch 42, and each elliptical groove and each rectangular patch 42 form a group with the elliptical Corresponding to the patch, there is a circular seam between the elliptical groove and the elliptical patch 42, the rectangular patch 42 has an overlapping part with the elliptical patch and is coupled with the elliptical patch, and the major axis of the elliptical patch and the major axis of the elliptical groove are in line with the The projection angles of the first microstrip line are both 45 degrees;

Wherein, the number of the elliptical patch and the first microstrip line is 2 ⁿ , and n is a positive integer.

As shown in Figure 1, when n is 2, the elliptical patch array 1 includes four elliptical patches, which are the first elliptical patch 111, the second elliptical patch 112, the third elliptical patch 113 and the fourth elliptical patch. Oval patch 114 . Correspondingly, the four oval grooves are the first oval groove 411 , the second oval groove 412 , the third oval groove 413 and the fourth oval groove 414 in sequence.

In specific implementation, the structures of the elliptical patches are the same, that is, the structures of the second elliptical patch 112 , the third elliptical patch 113 and the fourth elliptical patch 114 are the same as those of the first elliptical patch 111 .

In this embodiment, the angle between the long axis of the elliptical patch and the long axis of the elliptical groove and the projection of the first microstrip line 12 is 45 degrees in order to obtain two linearly polarized waves with equal amplitudes and a phase difference of 90 degrees. Only in this way can the radiation of circularly polarized waves be obtained; in addition, the annular seam formed by the elliptical groove and the elliptical patch constitutes capacitive loading, and the coupled short circuit between the elliptical patch and the rectangular patch 42 constitutes inductive loading, thereby realizing circularly polarized radiation within the working frequency band. It should be noted that the formation of the annular seam requires that the area of the elliptical groove be larger than the area of the elliptical patch.

In addition, the profiles of the elliptical patch and the first microstrip line 12 are all low, the thickness is small, and the volume occupied is also small. Therefore, if such an antenna is installed on the surface of the aircraft, the low-profile antenna can be integrated with the surface of the aircraft. Very conformal without additional aerodynamic effects on the vehicle itself.

In actual implementation, although coaxial feed can be used to achieve circular polarization, it is difficult to integrate the circuit board, which is not conducive to installation. Therefore, in this embodiment, by adopting a single-point feeding method, circular polarization can be realized and installation is convenient.

In the circularly polarized array antenna provided by this embodiment, each elliptical patch in the elliptical patch array is fed in parallel with the feed network through each first microstrip line, and the elliptical patch array and the feed network are placed on the PCB board. On the surface, the floor is placed on the lower surface of the PCB, and the floor has elliptical grooves and rectangular patches, and each elliptical groove and each rectangular patch is a group corresponding to an elliptical patch. There is a ring seam between the elliptical slot and the elliptical patch, which constitutes capacitive loading, while the coupling short circuit between the elliptical patch and the rectangular patch constitutes inductive loading. On this basis, the long axis of the elliptical patch and the length of the elliptical slot The projection angles between the long axis and the first microstrip line are both 45 degrees, so as to realize circularly polarized radiation in the working frequency band. Since the profiles of the elliptical patch and the first microstrip line are low, the thickness is small, and the volume occupied is small, the miniaturization and low-profile design of the antenna can be realized on the basis of circular polarization, and the antenna The cost is low, easy to integrate, and can be widely used in the field of wireless communication.

It can be understood that, in a specific implementation, the elliptical patch array and the feed network can be integrated into one body, which can be more convenient in use.

On the basis of the above embodiment, n is 2, and the four elliptical patches of the elliptical patch array 1 are the first elliptical patch 111, the second elliptical patch 112, the third elliptical patch 113 and the fourth elliptical patch piece 114, the distance between the first ellipse patch 111 and the second ellipse patch 112, the distance between the third ellipse patch 113 and the fourth ellipse patch 114 are all the same, and are larger than the distance between the second ellipse patch 112 and the third ellipse patch 112. The pitch of the patches 113 .

Correspondingly, the four oval grooves are the first oval groove 411, the second oval groove 412, the third oval groove 413 and the fourth oval groove 414, the distance between the first oval groove 411 and the second oval groove 412, the third The distances between the elliptical grooves 413 and the fourth elliptical grooves 414 are the same and greater than the distances between the second elliptical grooves 412 and the third elliptical grooves 413 , and the second elliptical grooves 412 and the third elliptical grooves 413 are connected.

In order to achieve circular polarization, the symmetry of the model is very important, which can also strengthen the stability of the feed network. Therefore, the number of elliptical patches in the elliptical patch array 1 in the utility model is 2 ⁿ , and n in this embodiment is 2, if n is 3, the four elliptical patches in Figure 2 can be regarded as an array element, followed by 8, 16, and 32, and finally connected to the feed point through the feed network 2.

In this embodiment, there is an overlapping portion between the second elliptical groove 412 and the third elliptical groove 413 on the floor 4, and the overlapping portion is dug out to form a connection, thereby realizing circularly polarized radiation within the working frequency band. It can be understood that if n is 1, it means that there are only the first elliptical groove 411 and the second elliptical groove 412 , therefore, there is no need for communication.

As a preferred embodiment, the major axis of the elliptical patch is 0.34 times the wavelength corresponding to the operating frequency of the antenna, the ratio of the major axis to the minor axis is 1.0438, and the ratio of the major axis to the minor axis of the elliptical slot is also 1.0438;

Among them, the working frequency of the antenna is 5.8GHz, the ISM frequency band.

As a preferred embodiment, the spacing between the first elliptical patch 111 and the second elliptical patch 112, the spacing between the third elliptical patch 113 and the fourth elliptical patch 114 are all half of the wavelength corresponding to the antenna operating frequency .

In this embodiment, the spacing is set as half of the wavelength, so that the array element radiation does not appear grating lobes, and can obtain as large a directivity as possible.

In a specific implementation, when the wavelength corresponding to the antenna operating frequency is 50mm, then correspondingly, the distance between the first elliptical patch 111 and the second elliptical patch 112, the distance between the third elliptical patch 113 and the fourth elliptical patch 114 The spacing is 25mm, the distance between the second elliptical patch 112 and the third elliptical patch 113 is 19mm, the length of the rectangular patch 42 is 15mm, that is, L3=15mm, and the width is 1.85mm, that is, W3=1.85mm, and the rectangular patch 42 The horizontal distance between the side of the center O of the elliptical groove and the center O is 6.12 mm, and the vertical distance between the bottom of the rectangular patch 42 and the center O is 0.2 mm.

The distance between the first oval groove 411 and the second oval groove 412 , the distance between the third oval groove 413 and the fourth oval groove 414 are all 25 mm, and the distance between the second oval groove 412 and the third oval groove 413 is 19 mm.

Correspondingly, at this time, the dimension a1 of the major axis of the elliptical patch is 17.35mm, the dimension b1 of the minor axis is 16.62mm, the dimension a2 of the major axis of the elliptical groove is 22mm, and the dimension b2 of the minor axis is 21.07mm.

On the basis of the above embodiments, the feed network 2 includes at least one type of microstrip line and a T-type converter connected to the microstrip line.

It can be understood that the feed network 2 is to be connected to a plurality of first microstrip lines 12 in a parallel feed mode, therefore, the selection of the type of microstrip lines in the feed network needs to be set according to the actual situation, but at least one Kind, and in order to realize single-point feed, adopt T-type converter to realize. The number of T-type converters also needs to be determined according to the number of the first microstrip lines 12 .

As a preferred implementation manner, n is 2, the impedance of the first microstrip line 12 is 50 ohms, and when it is necessary to obtain a 50 ohm SMA connector, the following manner can be specifically adopted.

The input impedance of the first microstrip line 12 is 50Ω, the length dimension L2 is 8mm, and the width dimension W2 is 1.82mm. The feed network 2 specifically includes a second microstrip line 21 with an impedance of 50 ohms, a third microstrip line 22 with an impedance of 70.71 ohms, a fourth microstrip line 23 with an impedance of 100 ohms, and three T-type converters;

Among them, the four second microstrip lines 21 are respectively connected to the four first microstrip lines 12, and then connected to the four third microstrip lines 22, and the four third microstrip lines 22 are connected to the four fourth microstrip lines. The four fourth microstrip lines 23 are connected in pairs by the first T-type converter 241 and the second T-type converter 242, and the first T-type converter 241 and the second T-type converter 242 are connected in sequence The second microstrip line 21, the third microstrip line 22 and the fourth microstrip line 23 are connected through the third T-type converter 243, and the third T-type converter 243 is connected with the second microstrip line 28 as a single Point feed interface.

It should be noted that the first and second microstrip lines in the present invention only distinguish types of microstrip lines, and do not refer to a single microstrip line. For example, in FIG. 3, although the second microstrip line 21 is connected between the first microstrip line 12 and the third microstrip line 22, the second microstrip line 241 is connected between the first T-type converter 241 and the third microstrip line 22. The microstrip line 21, but these two microstrip lines are not the same microstrip line, but are of the same type.

It can be understood that the type of the microstrip line finally connected to the third T-type converter needs to be determined according to the impedance of the SMA connector.

On the basis of the above embodiments, the PCB board 3 is a rectangular single-layer double-sided PCB board with a relative permittivity of 4.4, a tangent loss of 0.02, and a thickness of 1mm.

As a preferred embodiment, the thickness of the double-sided copper-clad laminates of the PCB board 3 is 35 μm.

In a specific implementation, the PCB board 3 can be made of FR4_epoxy microwave material, and the size of the PCB board 3 can be the same as that of the elliptical patch array 1, that is, the length dimension L1 is 109 mm, and the width dimension W1 is 63.66 mm.

In order to verify the performance of various aspects of the circularly polarized array antenna provided by the embodiment of the present invention. The specific simulation diagram is given below. Fig. 5 is a return loss diagram of a circularly polarized array antenna provided by an embodiment of the present invention. As shown in Figure 5, the working center frequency of the antenna is 5.8GHz, the working frequency band is 4GHz-6GHz, and the absolute bandwidth reaches 2GHz, which meets the requirements of a broadband antenna. Fig. 6 is an electromagnetic simulation axial ratio curve diagram of a circularly polarized array antenna provided by an embodiment of the present invention. As shown in Figure 5, within the range of -45.0deg-18.9deg in the main radiation direction, the axial ratios are all less than 3dB, indicating that the circular polarization effect is better.

In the above examples, the embodiments of the circularly polarized array antenna are described in detail, and the utility model also provides a communication device including the circularly polarized array antenna. In addition to the communication device body, the communication device includes the circularly polarized array antenna described in the above embodiments.

Since the embodiments of the circularly polarized array antenna part are described above, details are not repeated in this embodiment. It can be understood that the types of communication devices may be electronic products such as mobile phones and tablet computers.

The communication equipment provided in this embodiment includes a circularly polarized array antenna, and each elliptical patch in the elliptical patch array is fed in parallel with the feeding network through each first microstrip line, and the elliptical patch array and the feeding network are placed On the upper surface of the PCB, the floor is placed on the small surface of the PCB. The floor has an elliptical groove and a rectangular patch, and each elliptical groove and each rectangular patch are a group corresponding to an elliptical patch. There is a ring seam between the elliptical slot and the elliptical patch, which constitutes capacitive loading, while the coupling short circuit between the elliptical patch and the rectangular patch constitutes inductive loading. On this basis, the long axis of the elliptical patch and the length of the elliptical slot The projection angles between the long axis and the first microstrip line are both 45 degrees, so as to realize circularly polarized radiation in the working frequency band. Since the profiles of the elliptical patch and the first microstrip line are low, the thickness is small, and the volume occupied is small, the miniaturization and low-profile design of the antenna can be realized on the basis of circular polarization, and the antenna The cost is low, easy to integrate, and can be widely used in the field of wireless communication.

The circular polarized array antenna and the communication equipment provided by the utility model have been introduced in detail above. Each embodiment in the description is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for the related part, please refer to the description of the method part. 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.

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.

Claims (10)

1. a kind of circular polarised array antenna, it is characterised in that including ellipse patch array (1) and the ellipse patch array (1) The feeding network (2) of connection, pcb board (3) and floor (4)；

The ellipse patch array (1) includes ellipse patch and the first microstrip line (12) being connected with the ellipse patch, each institute The first microstrip line (12) is stated to be connected with the feeding network (2) by way of parallelly feeding, the ellipse patch array (1) and The feeding network (2) is placed in the upper surface of the pcb board (3), and the floor (4) is placed in the lower surface of the pcb board (3) On, the floor (4) has oval groove and rectangular patch (42), each described oval groove and each described rectangular patch (42) it is corresponding with the ellipse patch for one group, there is circumferential weld, the rectangle patch between the oval groove and the ellipse patch Piece (42) and the oval groove have lap and the coupling short between the ellipse patch, the major axis of the ellipse patch It it is 45 degree with the major axis of the oval groove and the projection angle of first microstrip line (12)；

Wherein, the quantity of the ellipse patch and first microstrip line (12) is 2ⁿ, n is positive integer.

2. circular polarised array antenna according to claim 1, it is characterised in that n 2, the ellipse patch array (1) 4 ellipse patchs be followed successively by the first ellipse patch (111), the second ellipse patch (112), the 3rd ellipse patch (113) and The spacing of 4th ellipse patch (114), first ellipse patch (111) and second ellipse patch (112), the described 3rd Ellipse patch (113) and the spacing all same of the 4th ellipse patch (114), and it is all higher than second ellipse patch (112) with the spacing of the 3rd ellipse patch (113)；

Corresponding, 4 oval grooves are followed successively by the first oval groove (411), the second oval groove (412), the 3rd oval groove (413) and the 4th oval groove (414), the spacing of first oval groove (411) and second oval groove (412), described Three oval grooves (413) and the spacing all same of the 4th oval groove (414), and it is more than second oval groove (412) and institute The spacing of the 3rd oval groove (413) is stated, second oval groove (412) connects with the 3rd oval groove (413).

3. circular polarised array antenna according to claim 2, it is characterised in that the major axis of the ellipse patch is antenna work The ratio of 0.34 times of wavelength corresponding to working frequency, major axis and short axle is 1.0438, the major axis of the oval groove and the ratio of short axle For 1.0438；

Wherein, the operating frequency of antenna is in 5.8GHz, ISM band.

4. circular polarised array antenna according to claim 3, it is characterised in that first ellipse patch (111) and institute State spacing, the 3rd ellipse patch (113) and the spacing of the 4th ellipse patch (114) of the second ellipse patch (112) It is the half of wavelength corresponding to the operating frequency of antenna.

5. circular polarised array antenna according to claim 1, it is characterised in that the feeding network (2) includes at least one Kind microstrip line and the T-shaped converter being connected with the microstrip line.

6. circular polarised array antenna according to claim 5, it is characterised in that the feeding network (2) specifically includes resistance Resist the second microstrip line (21) for 50 ohm, the 3rd microstrip line (22) that impedance is 70.71 ohm, that impedance is 100 ohm Four microstrip lines (23) and 3 T-shaped converters；

Wherein, 4 second microstrip lines (21) are connected with 4 first microstrip lines (12) respectively, then with 4 articles the described 3rd Microstrip line (22) connects, and 4 articles of the 3rd microstrip lines (22) are connected with 4 articles of the 4th microstrip lines (23) again, 4 articles the described 4th Microstrip line (23) is connected by the first T-shaped converter (241) and the second T-shaped converter (242) two-by-two, the first T-shaped conversion Device (241) and the second T-shaped converter (242) are sequentially connected second microstrip line (21), the 3rd microstrip line (22) and after the 4th microstrip line (23) connection connected again by the 3rd T-shaped converter (243), the 3rd T-shaped converter (243) it is connected with second microstrip line (21), as single-point feedback interface；

Wherein, n 2, the impedance of first microstrip line (12) is 50 ohm.

7. according to the circular polarised array antenna described in claim 1 to 6 any one, it is characterised in that the pcb board (3) is Rectangle single-layer double-side pcb board, relative dielectric constant 4.4, tangent loss 0.02, thickness 1mm.

8. circular polarised array antenna according to claim 7, it is characterised in that the double face copper of the pcb board (3) Thickness is 35 μm.

9. circular polarised array antenna according to claim 3, it is characterised in that first ellipse patch (111) and institute State spacing, the 3rd ellipse patch (113) and the spacing of the 4th ellipse patch (114) of the second ellipse patch (112) It is 25mm, the spacing of second ellipse patch (112) and the 3rd ellipse patch (113) is 19mm, the rectangle patch Piece (42) long 15mm, wide 1.85mm, and described in a back gauge of the rectangular patch (42) close to the center of circle (O) of the oval groove The horizontal range in the center of circle (O) is 6.12mm, and the base of the rectangular patch (42) and the vertical range of the center of circle (O) are 0.2mm；

The spacing of first oval groove (411) and second oval groove (412), the 3rd oval groove (413) and described The spacing of 4th oval groove (414) is 25mm, the spacing of second oval groove (412) and the 3rd oval groove (413) It is 19mm；

Wherein, wavelength corresponding to the operating frequency of antenna is 50mm.

10. a kind of communication equipment, it is characterised in that including the circular polarised array antenna described in claim 1-9 any one.