An omnidirectional cross dual-polarized element and antenna

Abstract

The application discloses an omnidirectional cross dual-polarized vibrator and an antenna, and the vibrator comprises a dipole vibrator, a choke disc, a fixed cylinder, a feeding sheet and a coaxial cable. The dipole vibrator is uniformly arranged on the side wall of the fixed cylinder and uniformly adheres to the side wall of the fixed cylinder, and the dipole vibrator comprises an upper vibrator lobe and a lower vibrator lobe. The center of a first positioning hole at the bottom end of the upper vibrator lobe is point A, the center of a second positioning hole at the top end of the lower vibrator lobe is point B, the straight line connecting point A and point B forms a polarization line, the included angle between the polarization line and a horizontal plane is 45 DEG, the dipole vibrator is provided with four groups, adjacent dipole vibrators are arranged at an angle of 90 DEG, the polarization lines of opposite dipole vibrators cross each other perpendicularly and are ±45 DEG polarized. Compared with the prior art, the vibrator not only reduces the mutual interference between two groups of vibrators, but also meets the miniaturization and compactness and improves the antenna isolation degree, and forms a double ±45 DEG omnidirectional radiation form.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of antennas, in particular to an omnidirectional cross dual-polarized element and an antenna. BACKGROUND

[0002] With the development of the communication industry and the popularization of the requirement of base station antenna miniaturization, most antennas are designed in the direction of multi-frequency, miniaturization, lightness and compactness, and isolation is one of the important performance parameters of the antenna. However, the design requirements of miniaturization and compactness will affect the isolation of the antenna, and the elements in the antenna will interfere with each other, reducing the reception and transmission efficiency of the antenna electromagnetic wave signal and the stability of the antenna. In the prior art, the distance between antennas or the distance between elements is often increased to increase the isolation, but it still cannot meet the design requirements of miniaturization and compactness.

[0003] Therefore, the above elements are difficult to improve the antenna isolation and stability on the basis of cost saving and miniaturization, and meet the needs of users in multiple scenarios. SUMMARY

[0004] The purpose of the present application is to provide an omnidirectional cross dual-polarized element and an antenna to solve one or more technical problems existing in the prior art, at least to provide a beneficial choice or create conditions.

[0005] The solution to the technical problem of the present application is to provide an omnidirectional cross dual-polarized element and an antenna.

[0006] According to an embodiment of the first aspect of the present application, an omnidirectional cross dual-polarized element comprises: a dipole element, a choke disc, a fixed cylinder, a feed sheet and a coaxial cable;

[0007] The dipole elements are uniformly arranged on the side wall of the fixed cylinder and uniformly attached along the side wall of the fixed cylinder, the dipole element comprises an upper element petal and a lower element petal, the center of the first positioning hole at the bottom end of the upper element petal is point A, the center of the second positioning hole at the top end of the lower element petal is point B, the straight line connecting point A and point B forms a polarization line, and the included angle between the polarization line and the horizontal plane is 45°;

[0008] One end of the feed sheet is connected to the bottom end of the upper element petal, the other end of the feed sheet is suspended, and extends along the polarization line and the lower element petal to lead out a feed point, the choke disc is connected to the bottom end of the lower element petal, the outer conductor of the coaxial cable is connected to the lower element petal, and the inner conductor of the coaxial cable is connected to the feed point;

[0009] The dipole element is provided with four groups, adjacent dipole elements are arranged at 90°, and the polarization lines of opposite dipole elements intersect each other perpendicularly, showing ±45° polarization.

[0010] Further, the upper vibrator petal comprises a first extension section, a first frequency expansion section and a first vertical section;

[0011] The top end of the first vertical section is fitted along the top edge of the fixed cylinder, the two side edges of the first vertical section are bent inward by 90° to form the first extension section, the first extension section is clamped with the side wall of the fixed cylinder, the bottom end of the first vertical section extends towards the polarization line direction and is inclined downward by a first angle to form the top end of the first frequency expansion section, the top end of the first frequency expansion section extends towards the polarization line direction and is inclined upward by a second angle to form the bottom end of the first frequency expansion section, and the bottom end of the first frequency expansion section is provided with the first positioning hole.

[0012] Further, the lower vibrator petal comprises a second extension section, a second frequency expansion section, a second vertical section and an anti-interference section;

[0013] The bottom end of the anti-interference section is connected with the choke disc, the top end of the anti-interference section is fitted along the bottom edge of the fixed cylinder, the top end of the anti-interference section extends vertically upward to form the second vertical section, the two side edges of the second vertical section are bent inward by 90° to form the second extension section, the second extension section is clamped with the side wall of the fixed cylinder, the top end of the second vertical section extends towards the polarization line direction and is inclined downward by the first angle to form the bottom end of the second frequency expansion section, the bottom end of the second frequency expansion section extends towards the polarization line direction and is inclined upward by the second angle to form the top end of the second frequency expansion section, and the top end of the second frequency expansion section is provided with the second positioning hole.

[0014] Further, the feeding sheet comprises a first lead-out section, a second lead-out section and a connecting section;

[0015] One end of the connecting section is connected vertically to the bottom end of the upper vibrator petal, the other end of the connecting section is bent to lead out the first lead-out section, the first lead-out section extends along the polarization line and around the side wall of the fixed cylinder to the middle part of the lower vibrator petal to lead out the second lead-out section, the second lead-out section extends vertically downward until the feeding point on the second lead-out section is at the same horizontal plane as the bottom end of the fixed cylinder, and the first lead-out section and the second lead-out section are both separated from the lower vibrator petal by a first distance.

[0016] Further, the fixed cylinder comprises a top circle, a bottom circle and a fixing member;

[0017] The two ends of the fixing member are connected with the top circle and the bottom circle respectively, and the fixing member comprises a first fixing section, a second fixing section and an inclined section;

[0018] The top end of the first fixed section is connected with the top circle and is provided with a first clamping piece for clamping and fixing an upper dipole petal, the bottom end of the first fixed section extends along the polarization line to form one end of an inclined section, the bottom end of the second fixed section is connected with the bottom circle and is provided with a second clamping piece for clamping and fixing a lower dipole petal, and the top end of the second fixed section extends along the polarization line to form the other end of the inclined section.

[0019] Further, the edge of the bottom circle is provided with a first limiting opening, the bottom end of the second fixed section is provided with a second limiting opening, and the first limiting opening and the second limiting opening form a wire hole for fixing a coaxial cable passing through the choke disc.

[0020] Further, the choke disc is provided with a third limiting opening for fixing the coaxial cable.

[0021] Further, the first angle is 45°.

[0022] Further, the second angle is 21°.

[0023] According to the embodiment of the second aspect of the present application, an antenna comprises the omnidirectional cross dual-polarized dipole of the embodiment of the first aspect of the present application.

[0024] The present application has the following beneficial effects: the dipole is arranged at 45° with the horizontal plane, and adjacent dipoles are arranged at 90° on the side wall of the fixed cylinder, uniformly adhere to the wall surface, and form an arc-shaped curved surface, so that the polarization lines of the opposite dipoles can cross each other vertically, and form ±45° polarization. Compared with the prior art which increases the distance between antennas or the distance between dipoles to increase the isolation, the present application reduces the mutual interference between the two groups of dipoles through the design of the fixed cylinder and the dipole, and improves the isolation of the antenna while meeting the miniaturization and compactness, and does not affect the realization of cross ±45° dual polarization of the dipole, forms a double ±45° omnidirectional radiation form, and meets the needs of multiple use scenarios of users. The choke disc is arranged to solve the problem of large interference current at the bottom of the dipole in the present application, and improve the stability of the isolation and standing wave ratio of the dipole. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structure schematic diagram of an omnidirectional cross dual-polarized dipole provided by an embodiment of the present application;

[0026] Figure 2 is a structure schematic diagram of an omnidirectional cross dual-polarized dipole provided by another embodiment of the present application;

[0027] Figure 3 is a structure schematic diagram of a dipole provided by an embodiment of the present application;

[0028] Figure 4 is a structural diagram of a fixed cylinder provided by one embodiment of the present application;

[0029] Figure 5 is a partial size diagram of a dipole vibrator provided by one embodiment of the present application;

[0030] Figure 6 is a radiation pattern of an omnidirectional cross dual-polarized vibrator in a 900MHz frequency band provided by one embodiment of the present application;

[0031] Figure 7 is a radiation pattern of an omnidirectional cross dual-polarized vibrator in a 1710MHz frequency band provided by one embodiment of the present application;

[0032] Figure 8 is a radiation pattern of an omnidirectional cross dual-polarized vibrator in a 3500MHz frequency band provided by another embodiment of the present application;

[0033] Figure 9 is a voltage standing wave ratio and isolation test result provided by one embodiment of the present application.

[0034] Reference signs: 100, dipole vibrator, 110, upper vibrator petal, 111, first extension section, 112, first frequency band, 113, first vertical section, 120, lower vibrator petal, 121, second extension section, 122, second frequency band, 123, second vertical section, 124, anti-interference section, 130, first positioning hole, 140, second positioning hole, 150, polarization line;

[0035] 200, fixed cylinder, 210, top circle, 220, bottom circle, 221, first limiting port, 230, fixing member, 231, first fixing section, 232, second fixing section, 233, inclined section, 234, second limiting port, 235, first clamping member, 236, second clamping member;

[0036] 300, feed sheet, 310, first lead-out section, 320, second lead-out section, 330, connecting section, 340, feed point, 400, coaxial cable, 500, choke disc, 510, third limiting port. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0038] It should be noted that although the functional modules are divided in the system schematic diagram, in some cases, the steps shown or described can be different from the module division in the system or the order of execution in the flowchart. The terms "first", "second", etc. in the description and claims and the above figures are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0039] In the description of the present application, it should be noted that, unless otherwise explicitly limited, the words such as setting, installation, connection, etc. should be understood broadly, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0040] Referring to Figures 1 to 5 According to some embodiments of the first aspect of the present application, an omnidirectional cross dual-polarized vibrator includes choke disc 500, fixed cylinder 200, feed patch 300, coaxial cable 400 and dipole vibrator 100.

[0041] The dipole vibrator 100 is attached to the side wall of the fixed cylinder 200 and is fixed to the wall surface of the side wall of the fixed cylinder 200, forming an arc-shaped curved surface. In this embodiment, the present vibrator is provided with four groups of dipole vibrators 100, which are arranged on the side wall of the fixed cylinder 200, and adjacent dipole vibrators 100 are 90°. To achieve uniform arrangement of dipole vibrators 100 on the side wall of the fixed cylinder 200. The arrangement of the four groups of dipole vibrators 100 on the fixed cylinder 200 creates conditions for the miniaturization and compactness of the antenna, and does not affect the isolation between vibrators.

[0042] The dipole vibrator 100 includes an upper vibrator lobe 110 and a lower vibrator lobe 120. Wherein, the dipole vibrator 100 can be driven to vibrate by using alternating electric field, and the frequency of the change of the electric field is equal to the resonance frequency of the dipole itself. At this time, the dipole will maximize the absorption of the energy of the electric field, and the vibration amplitude will become larger and larger.

[0043] The size of the vibrator ranges from 1 / 2λ of low frequency to 1*λ of high frequency, and the dipole vibrator 100 can generate the required resonance within the working frequency band, including 698MHz-960MHz, 1710MHz-2700MHz, 3300-3800MHz, so as to get a good standing wave ratio, and meet the user's demand for multiple scenarios.

[0044] The bottom end of the upper vibrator lobe 110 is provided with a first positioning hole 130, and the top end of the lower vibrator lobe 120 is provided with a second positioning hole 140. The center of the first positioning hole 130 is set as point A, and the center of the second positioning hole 140 is set as point B. The straight line connecting point A and point B is the polarization line 150 of the dipole vibrator 100. The angles between the polarization lines 150 of the four groups of dipole vibrators 100 and the horizontal plane are all 45°. By installing the four groups of dipole vibrators 100 on the side wall of the fixed cylinder 200, the polarization lines 150 of the opposite dipole vibrators 100 cross each other and are perpendicular, the four groups of dipole vibrators 100 are uniformly distributed in four directions, and cross ±45° dual polarization is formed to work in the form of double ±45° omnidirectional radiation.

[0045] That is, the middle part of the dipole vibrator 100 is designed to be inclined at 45° to form 45° polarization travel. The four groups of identical dipole vibrators 100 are uniformly distributed on the wall surface of the fixed cylinder 200 and uniformly fit along the wall surface to form an arc-shaped curved surface. The opposite two dipole vibrators 100 in the uniformly distributed four groups of dipole vibrators 100 form ±45° dual polarization, thereby reducing the mutual interference between the two vibrators and improving the isolation of the antenna vibrator.

[0046] The end point of the bottom end of the upper vibrator lobe 110 is connected to one end of the feeding sheet 300. The other end of the feeding sheet 300 is first extended along the polarization line 150, and then extended towards the shape structure of the lower vibrator lobe 120, and a feeding point 340 is led out at the bottom of the fixed cylinder 200. The other end of the feeding sheet 300 is suspended and does not contact the lower vibrator lobe 120 and the side wall of the fixed cylinder 200.

[0047] The choke disc 500 is located below the fixed cylinder 200. The coaxial cable 400 passes through the choke disc 500 and the fixed cylinder 200 from bottom to top. The outer conductor is connected to the lower vibrator lobe 120, and the inner conductor passes through the lower vibrator lobe 120 and is connected to the feeding point 340. One end of the coaxial cable 400 is connected to the vibrator lobe of the four groups of lower dipole vibrators 100 and the corresponding feeding point 340, and the other end of the coaxial cable 400 is connected to an external device, that is, four coaxial cables 400 are provided, and four output input ports are provided.

[0048] The choke disc 500 is connected to the bottom end of the lower vibrator lobe 120 of the four groups of dipole vibrators 100. Since the interference current at the bottom end of the dipole vibrator 100 is large, the choke disc 500 is used to control and reduce the interference between the dipole vibrators 100 and reduce a part of the interference current flowing to the output input port on the coaxial cable 400, so that the isolation of the antenna vibrator and the stability of the standing wave ratio are greatly improved.

[0049] The dipole vibrator 100 is 45° to the horizontal plane, and adjacent dipole vibrators 100 are arranged at 90° on the side wall of the fixed cylinder 200, uniformly attached along the wall surface to form an arc-shaped curved surface, so that the polarization lines 150 of the opposite dipole vibrators 100 can be perpendicular to each other, and a ±45° polarization is formed. Compared with the prior art which increases the distance between the antennas or the distance between the vibrators to increase the isolation, the present vibrator, through the design of the fixed cylinder 200 and the dipole vibrator 100, not only reduces the mutual interference between the two groups of vibrators, but also meets the miniaturization and lightness while improving the antenna isolation, without affecting the realization of the crossed ±45° dual polarization of the vibrator, forming a double ±45° omnidirectional radiation form, and meeting the needs of users in multiple use scenarios.

[0050] Reference Figures 1 to 5 According to some embodiments of the first aspect of the application, the upper vibrator lobe 110 comprises a first extension section 111, a first frequency extension section 112, and a first vertical section 113.

[0051] The edge of the top end of the first vertical section 113 is attached along the edge of the top of the fixed cylinder 200, that is, the bending arc of the top end of the first vertical section 113 is the arc of the top of the fixed cylinder 200. The first extension section 111 is formed by bending 90° inward from both sides of the first vertical section 113, the first extension section 111 is clamped with the fixing part 230 on the side wall of the fixed cylinder 200, and the width dimension of the first extension section 111 is in the range of 4mm to 8mm. By setting the first extension section 111, the area of the upper vibrator lobe 110 is increased, and the gain of the vibrator is maximized on the basis of meeting the isolation.

[0052] The top end of the first frequency extension section 112 is inclined downward by a first angle from the bottom end of the first vertical section 113 in the direction of the polarization line 150, and is extended to form, wherein the first angle is 45°. That is, the included angle between one side of the top end of the first frequency extension section 112 and one side of the first vertical section 113 is 45°, that is, the included angle between one side of the top end of the first frequency extension section 112 and the vertical line is 45°, and correspondingly, the included angle between the other side of the top end of the first frequency extension section 112 and the other side of the first vertical section 113 is also 45°.

[0053] The bottom end of the first frequency extension section 112 is inclined by a second angle from the top end of the first frequency extension section 112 in the direction of the polarization line 150, and gradually approaches the polarization line 150, and is extended to form, wherein the second angle is 21°. That is, the included angle between one side of the bottom end of the first frequency extension section 112 and one side of the top end of the first frequency extension section 112 is 21°, and correspondingly, the included angle between the other side of the top end of the first frequency extension section 112 and the other side of the bottom end of the first frequency extension section 112 is also 21°.

[0054] The bottom end of the first extension frequency band 112 gradually approaches the polarization line 150 on both sides, and the angle between the two sides of the bottom end of the first extension frequency band 112 is 42°, which is an isosceles trapezoid. That is, the first vertical section 113 extends towards the polarization line 150, first inclines downward by 45° in the same direction, and then approaches the polarization line 150 and inclines downward by 21°.

[0055] The first positioning hole 130 is arranged on the bottom end of the first extension frequency band 112, and the first positioning hole 130 is located on the geometric center line of the bottom end of the first extension frequency band 112.

[0056] In the embodiment, the first extension section 111 is designed to increase the area of the oscillator, improve the gain of the oscillator, and the first extension frequency band 112 is designed to extend along the polarization line 150, widen the working frequency band of the oscillator, and enable the oscillator to be polarized at 45°.

[0057] With reference to Figures 1 to 5 According to some embodiments of the first aspect of the application, the lower oscillator lobe 120 comprises a second extension section 121, a second extension frequency band 122, a second vertical section 123, and an anti-interference section 124.

[0058] The choke disc 500 is connected to the bottom end of the anti-interference section 124, wherein the choke disc 500 is arranged at a distance of 1 / 4λ from the bottom of the four groups of dipole oscillators 100. Since the bottom of the dipole oscillator 100 has a large interference current, the choke disc 500 is used to control and reduce the interference between the dipole oscillators 100, and at the same time, reduce a part of the interference current flowing to the output / input port on the coaxial cable 400, so that the isolation and the stability of the standing wave ratio of the antenna oscillator are greatly improved.

[0059] The second vertical section 123 is formed by vertically extending upward from the top end of the anti-interference section 124, and the edge of the top end of the anti-interference section 124 is fitted along the edge of the bottom of the fixed cylinder 200, that is, the curved arc of the bottom end of the second vertical section 123 is the arc of the bottom of the fixed cylinder 200. The second vertical section 123 is provided with a conductive hole for the inner conductor of the coaxial cable 400 to pass through.

[0060] The second extension section 121 is formed by bending 90° inward from both sides of the second vertical section 123, and the second extension section 121 is clamped with the fixing part 230 on the side wall of the fixed cylinder 200, and the width of the second extension section 121 is in the range of 4mm to 8mm. By arranging the second extension section 121, the area of the lower oscillator lobe 120 is increased, and on the basis of meeting the isolation, the gain of the oscillator is maximized.

[0061] The bottom end of the second extension frequency band 122 is inclined by a first angle upward from the top end of the second vertical section 123 in the direction of the polarization line 150, and is extended to form a bottom end of the second extension frequency band 122, wherein the first angle is 45°. That is, the angle between one side of the bottom end of the second extension frequency band 122 and one side of the second vertical section 123 is 45°, that is, the angle between one side of the bottom end of the second extension frequency band 122 and the vertical line is 45°, and correspondingly, the angle between the other side of the bottom end of the second extension frequency band 122 and the other side of the second vertical section 123 is also 45°.

[0062] The top end of the second extension frequency band 122 is extended from the bottom end of the second extension frequency band 122 in the direction of the polarization line 150, and is gradually inclined by a second angle to approach the polarization line 150 to form a top end of the second extension frequency band 122, wherein the second angle is 21°. That is, the angle between one side of the bottom end of the second extension frequency band 122 and one side of the top end of the second extension frequency band 122 is 21°, and correspondingly, the angle between the other side of the top end of the second extension frequency band 122 and the other side of the bottom end of the second extension frequency band 122 is also 21°.

[0063] The two sides of the top end of the second extension frequency band 122 gradually approach the polarization line 150, and the angle between the two sides of the top end of the second extension frequency band 122 is 42°, which is an isosceles trapezoid. That is, the second vertical section 123 extends in the direction of the polarization line 150, first inclines upward by 45° in the same direction, and then inclines upward by 21° to approach the polarization line 150.

[0064] The second positioning hole 140 is arranged on the top end of the second extension frequency band 122, and the second positioning hole 140 is located on the geometric center line of the bottom end of the second extension frequency band 122. Wherein, the first extension frequency band 112 and the second extension frequency band 122 are opposite to each other, and the positioning holes on the two form the polarization line 150, and the straight line interval between the bottom end edge of the first extension frequency band 112 and the top end edge of the second extension frequency band 122 is 7.9mm. The straight line interval between the geometric center line of the first vertical section 113 and the geometric center line of the second vertical section 123 is 44.2mm.

[0065] In this embodiment, by designing the second extension section 121, the area of the oscillator is increased, and the gain of the oscillator is improved, and the second extension frequency band 122 is designed to extend along the polarization line 150 and correspond to the first extension frequency band 112 of the upper oscillator lobe 110, the working frequency band of the oscillator is widened, so that the oscillator can be polarized at 45°.

[0066] It should be noted that the first angle and the second angle are preferred tilt angles for the vibrator to widen the frequency band, which can widen the working frequency band to the maximum extent. In the embodiment, the first angle and the second angle can adopt other angles or the tilt angles in the embodiment are varied within a certain range and fine-tuned as the tilt angles of the first frequency widening band 112 and the second frequency widening band 122 to realize the polarization of the vibrator at 45°. In the embodiment, the first angle and the second angle are not specifically limited.

[0067] With reference to Figures 1 to 5 According to some embodiments of the first aspect of the application, the feed patch 300 comprises a connecting segment 330, a first leading segment 310 and a second leading segment 320.

[0068] One end of the connecting segment 330 is connected to the end point of the bottom end of the first frequency widening band 112, and the one end of the connecting segment 330 is perpendicular to the bottom end of the first frequency widening band 112. The first leading segment 310 is formed by bending the other end of the connecting segment 330, and the first leading segment 310 extends along the polarization line 150 around the side wall of the fixed cylinder 200 to the top end of the second vertical segment 123 to form the second leading segment 320. The bottom end of the upper vibrator lobe 110 is connected to the one end of the connecting segment 330, and the end point of the upper vibrator lobe 110 is perpendicular to the first leading segment 310, which extends along the polarization line 150 to the middle of the lower vibrator lobe 120.

[0069] That is, the first leading segment 310 forms an angle of 45° with the horizontal plane, and the first leading segment 310 is separated from the lower vibrator lobe 120 by a first distance, so it can be known that the first leading segment 310 is also separated from the side wall of the fixed cylinder 200 by the first distance.

[0070] The feed point 340 is arranged at the bottom end of the second leading segment 320, and the second leading segment 320 extends vertically downward along the second vertical segment 123 until the feed point 340 and the bottom circle 220 on the fixed cylinder 200 are located on the same horizontal plane. To achieve that the second leading segment 320 extends vertically downward from the middle of the lower vibrator lobe 120, and the feed point 340 and the bottom end of the fixed cylinder 200 are located on the same horizontal plane.

[0071] That is, the second leading segment 320 forms an angle of 90° with the horizontal plane, and the second leading segment 320 is separated from the lower vibrator lobe 120 by a first distance, and in the embodiment, the first distance is in the range of 3mm to 6mm.

[0072] That is, the upper lobe 110 of the dipole vibrator 100 is connected with a feeding piece 300 at the bottom end position of the upper lobe 110, the feeding piece 300 extends around the back of the dipole vibrator 100 at a position of 3mm to 6mm above the center of the dipole vibrator 100, and extends to the middle of the lower lobe 120 of the dipole vibrator 100. In the embodiment, the feeding piece 300 is an air microstrip line, the size of which is about 1 / 2λ, and the width is converted from 70Ω to 50Ω. In this way, the dipole vibrator 100 can be matched to the maximum extent, the effective bandwidth can be effectively widened, and a good standing wave ratio can be obtained at the working frequency. The air microstrip line is a low-loss feeding line, which can reduce the loss of gain.

[0073] With reference to Figures 1 to 5 According to some embodiments of the first aspect of the application, the fixed cylinder 200 comprises a top circle 210, a bottom circle 220 and a fixed part 230.

[0074] The fixed part 230 is provided with four groups, which correspond to the four groups of dipole vibrators 100. The fixed part 230 serves as a side wall of the fixed cylinder 200 and is used to fix and clamp the four groups of dipole vibrators 100. One end of the fixed part 230 is connected with the top circle 210, and the other end of the fixed part 230 is connected with the bottom circle 220.

[0075] The fixed part 230 comprises a first fixed section 231, a second fixed section 232 and an inclined section 233.

[0076] The bottom surface of the top circle 210 is connected with the top end of the first fixed section 231, the top end of the first fixed section 231 is provided with a first clamping part 235, and the first clamping part 235 is used to clamp and fix the upper lobe 110, so as to fix the first extension section 111 in the upper lobe 110 and prevent the first extension section 111 from deforming, thereby preventing the first vertical section 113 from deforming.

[0077] The top surface of the bottom circle 220 is connected with the bottom end of the second fixed section 232, the bottom end of the second fixed section 232 is provided with a second clamping part 236, and the second clamping part 236 is used to clamp and fix the lower lobe 120, so as to fix the second extension section 121 in the lower lobe 120 and prevent the second extension section 121 from deforming, thereby preventing the second vertical section 123 from deforming.

[0078] One end of the inclined section 233 is obtained by extending the bottom end of the first fixed section 231 along the polarization line 150, the other end of the inclined section 233 is obtained by extending the top end of the second fixed section 232 along the polarization line 150, the bottom end of the first fixed section 231 and the top end of the second fixed section 232 form the inclined section 233, the angle between the inclined section 233 and the horizontal plane is 45°, and the inclined section 233 is used to fix the first frequency extension section 112 and the second frequency extension section 122.

[0079] The connection part of the bottom circle 220 and the second fixed section 232 is provided with a wire hole, and the edge of the bottom circle 220 is provided with a first limiting opening 221, and the bottom end of the second fixed section 232 is provided with a second limiting opening, so that the first limiting opening 221 and the second limiting opening correspond to each other to form a wire hole. The coaxial cable 400 passes through the choke disc 500, is fixed through the wire hole, and the coaxial cable 400 faces the second vertical section 123 of the lower vibrator lobe 120. The outer conductor of the coaxial cable 400 is connected with the second vertical section 123, and the inner conductor of the coaxial cable 400 passes through the conductive hole of the second vertical section 123 and is connected with the feeding point 340.

[0080] The top circle 210, the bottom circle 220 and the fixed part 230 form a stable "cylindrical" structure, which facilitates the installation of the four groups of dipole vibrators 100, and the positioning of the four groups of dipole vibrators 100 is accurate, and the stability of the antenna performance is improved. The wire hole formed by the bottom circle 220 and the second vertical section 123 fixes the position of the coaxial cable 400, and facilitates the connection of the coaxial cable 400 with the lower vibrator lobe 120 and the feeding sheet 300.

[0081] Referring to Figures 1 to 5 According to some embodiments of the first aspect of the application, the choke disc 500 is provided with a third limiting opening 510 for fixing the coaxial cable 400, so that the coaxial cable 400 can be fixed on the anti-interference section 124 of the lower vibrator lobe 120.

[0082] Referring to Figure 6 , Figure 6 is the radiation pattern of the dual-polarized wideband vibrator of the application when working in the 900MHz working frequency band. When working in the 900MHz working frequency band, the vertical plane lobe width of the vibrator is 95°.

[0083] Referring to Figure 7 , Figure 7 is the radiation pattern of the dual-polarized wideband vibrator of the application when working in the 1710MHz working frequency band. When working in the 1710MHz working frequency band, the vertical plane lobe width of the vibrator is 65°.

[0084] Referring to Figure 8 , Figure 8 is the radiation pattern of the dual-polarized wideband vibrator of the application when working in the 3500MHz working frequency band. When working in the 3500MHz working frequency band, the vertical plane lobe width of the vibrator is 45°.

[0085] Referring to Figure 9 , Figure 9The polarization voltage standing wave ratio and isolation degree test results of the dual-polarized wideband dipole double-port are measured, the polarization voltage standing wave ratio and isolation degree are one of important performance parameters of the antenna, the voltage standing wave ratio of the dual-polarized wideband dipole is 2.0, and the isolation degree is 20dB, from Figure 9 It can be known that the dual-polarized wideband dipole has good matching, less reflected power, high transmission efficiency and strong anti-interference ability in the working frequency range.

[0086] According to the embodiment of the second aspect of the application, an antenna comprises the omnidirectional cross dual-polarized dipole of the embodiment of the first aspect, and the working frequency range of the antenna comprises 698MHz-960MHz, 1710MHz-2700MHz and 3300-3800MHz, so as to meet the demand of multiple use scenarios of users.

[0087] The preferred embodiments of the application are specifically described above, but the application is not limited to the described embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the application.

Claims

1. An omnidirectional cross-polarized oscillator, characterized in that, include: Dipole oscillator, choke plate, fixed cylinder, feed plate and coaxial cable; The dipole oscillators are evenly arranged on the side wall of the fixed cylinder and are evenly attached to the side wall of the fixed cylinder. The dipole oscillator includes an upper oscillator lobe and a lower oscillator lobe. Let point A be the center of the first positioning hole at the bottom end of the upper oscillator lobe and point B be the center of the second positioning hole at the top end of the lower oscillator lobe. Point A and point B are connected by a straight line to form a polarization line. The angle between the polarization line and the horizontal plane is 45°. One end of the feed plate is connected to the bottom end of the upper vibrating lobe, and the other end of the feed plate is suspended and extends along the polarization line and the lower vibrating lobe to lead out the feed point. The choke plate is connected to the bottom end of the lower vibrating lobe. The outer conductor of the coaxial cable is connected to the lower vibrating lobe, and the inner conductor of the coaxial cable is connected to the feed point. The dipole oscillator is provided in four groups, with adjacent dipole oscillators arranged at 90°, and the polarization lines of opposite dipole oscillators intersecting perpendicularly, with a polarization of ±45°.

2. The omnidirectional cross-polarized oscillator according to claim 1, characterized in that, The upper sublobe includes: a first extension segment, a first frequency extension segment, and a first vertical segment; The top of the first vertical segment fits along the top edge of the fixed cylinder. Both sides of the first vertical segment are bent inward at 90° to form a first extension segment. The first extension segment is engaged with the side wall of the fixed cylinder. The bottom of the first vertical segment extends in the direction of the polarization line and tilts downward at a first angle to form the top of the first frequency extension segment. The top of the first frequency extension segment extends in the direction of the polarization line, and both sides move towards the polarization line and tilt downward at a second angle to form the bottom of the first frequency extension segment. The bottom of the first frequency extension segment is provided with the first positioning hole.

3. The omnidirectional cross-polarized oscillator according to claim 2, characterized in that, The lower vibrating lobe includes: a second extension segment, a second frequency-spreading segment, a second vertical segment, and an anti-interference segment; The bottom end of the anti-interference section is connected to the choke disk, and the top end of the anti-interference section is attached to the bottom edge of the fixed cylinder. The top end of the anti-interference section extends vertically upward to form a second vertical section. Both sides of the second vertical section are bent inward at 90° to form a second extension section. The second extension section is engaged with the side wall of the fixed cylinder. The top end of the second vertical section extends towards the polarization line and tilts upward at the first angle to form the bottom end of the second frequency extension section. The bottom end of the second frequency extension section faces the polarization line, and both sides move towards the polarization line and tilt upward at the second angle to extend to form the top end of the second frequency extension section. The top end of the second frequency extension section is provided with the second positioning hole.

4. The omnidirectional cross-polarized oscillator according to claim 1, characterized in that, The power supply section includes: a first lead-out section, a second lead-out section, and a connecting section; One end of the connecting segment is vertically connected to the bottom end of the upper oscillator lobe, and the other end of the connecting segment is bent to lead out a first lead-out segment. The first lead-out segment extends along the polarization line, around the side wall of the fixed cylinder, to the middle of the lower oscillator lobe, and leads out a second lead-out segment. The second lead-out segment extends vertically downward until the feed point on the second lead-out segment is at the same horizontal plane as the bottom end of the fixed cylinder. Both the first lead-out segment and the second lead-out segment are separated from the lower oscillator lobe by a first distance.

5. An omnidirectional cross-polarized oscillator according to claim 1, characterized in that, The fixed cylinder includes: a top circle, a bottom circle, and a fixing element; The two ends of the fastener are respectively connected to the top circle and the bottom circle, and the fastener includes a first fixing section, a second fixing section and an inclined section; The top end of the first fixed section is connected to the top circle and is provided with a first snap-fit ​​member. The first snap-fit ​​member is used to snap-fit ​​and fix the upper oscillator lobe. The bottom end of the first fixed section extends along the polarization line to form one end of the inclined section. The bottom end of the second fixed section is connected to the bottom circle and is provided with a second snap-fit ​​member. The second snap-fit ​​member is used to snap-fit ​​and fix the lower oscillator lobe. The top end of the second fixed section extends along the polarization line to form the other end of the inclined section.

6. An omnidirectional cross-polarized oscillator according to claim 5, characterized in that, The bottom circle has a first limiting opening on its edge, and the bottom end of the second fixed section has a second limiting opening. The first limiting opening and the second limiting opening form a wire hole, which is used to fix the coaxial cable passing through the choke plate.

7. An omnidirectional cross-polarized oscillator according to claim 1, characterized in that, The choke plate is provided with a third limiting port, which is used to fix the coaxial cable.

8. An omnidirectional cross-polarized oscillator according to claim 3, characterized in that, The first angle is 45°.

9. An omnidirectional cross-polarized oscillator according to claim 3, characterized in that, The second angle is 21°.

10. An antenna, characterized in that, Including an omnidirectional cross-polarized oscillator as described in any one of claims 1 to 9.

Images