CN118198715B - Double-cone omnidirectional ceiling antenna - Google Patents

Abstract

The application relates to the technical field of antennas, in particular to a biconical omni-directional ceiling antenna. The device comprises a first conical radiator, a second conical radiator, a spacing fixing piece, a feed welding piece and a radio frequency coaxial jumper; the bottom of the first conical radiator is provided with a first perforation, and the corresponding position of the bottom of the second conical radiator is provided with a second perforation; a plurality of clamping hooks are arranged on the interval fixing piece along the circumferential direction, and a plurality of positioning holes are correspondingly arranged on the first conical radiator; the upper end of the feed welding piece passes through the second perforation from bottom to top and then is connected with the interval fixing piece; the feed welding piece is axially provided with a mounting hole, the radio frequency coaxial jumper wire is arranged in the mounting hole in a penetrating mode, the inner conductor of the radio frequency coaxial jumper wire is fixedly welded with the first conical radiator, and the outer conductor of the radio frequency coaxial jumper wire is fixedly welded with the feed welding piece. The stability of the double-cone omnidirectional ceiling antenna mounting structure is improved, the semi-finished product can be effectively fixed without an outer cover or external parts, and the mounting structure can be directly and visually inspected after the mounting is finished.

Description

Double-cone omnidirectional ceiling antenna

Technical Field

The application relates to the technical field of antennas, in particular to a biconical omni-directional ceiling antenna.

Background

With the continuous development of communication technology, more requirements are put on antenna products, and particularly, requirements on intermodulation indexes of antennas are higher and higher. The double-cone omnidirectional ceiling antenna in the prior art comprises an upper cone-shaped radiating unit, an upper cone-shaped radiating body and a coaxial jumper wire, wherein the upper cone-shaped radiating body is connected with an inner conductor of the coaxial jumper wire, and the upper cone-shaped radiating body is connected with an outer conductor of the coaxial jumper wire. The upper and lower conical radiators need to be relatively insulated, and the relative positions of the upper and lower conical radiators influence the impedance index of the whole antenna.

In the prior art, a nonmetallic spacer is generally utilized to insulate and keep the two relative positions, but in the prior art, the spacer only limits the upper conical radiator and the space between the upper conical radiator to a certain extent, the upper conical radiator and the lower conical radiator are not effectively fixed, and especially the upper conical radiator is completely connected and fixed by welding the upper conical radiator with the inner conductor of the coaxial jumper, the inner conductor of the coaxial jumper is made of copper, the diameter is smaller, the connection is unreliable, and the upper conical radiator is easy to loosen and fall off. Although the prior art has a scheme of fixing the upper conical radiator by using a rib position (such as the patent with the application number of 201610709337.9) or an additional fixing piece (such as the patent with the application number of 201821537098.4) on the outer cover, the problem that the upper conical radiator without the outer cover is loose and falls off in the production process cannot be avoided, and the fixing effect cannot be directly checked visually, so that abnormal conditions such as deflection and eccentricity cannot be avoided after assembly.

Disclosure of Invention

In order to solve the technical problems or at least partially solve the technical problems, the application provides a biconical omni-directional ceiling antenna.

The application provides a double-cone omnidirectional ceiling antenna which comprises a first cone-shaped radiator, a second cone-shaped radiator, a spacing fixing piece, a feed welding piece and a radio frequency coaxial jumper, wherein the first cone-shaped radiator and the second cone-shaped radiator are arranged in a back-to-back mode; the bottom of the first conical radiator is provided with a first perforation, and the corresponding position of the bottom of the second conical radiator is provided with a second perforation;

the interval fixing piece is arranged between the first conical radiator and the second conical radiator, a plurality of clamping hooks are arranged on the interval fixing piece along the circumferential direction, a plurality of positioning holes are correspondingly arranged on the first conical radiator, and the clamping hooks are correspondingly clamped with the positioning holes;

the upper end of the feed welding piece passes through the second perforation from bottom to top and then is connected with the interval fixing piece; the feed welding piece is provided with a mounting hole along the axial direction, the radio frequency coaxial jumper wire is arranged in the mounting hole in a penetrating mode, the inner conductor of the radio frequency coaxial jumper wire is fixedly welded with the first conical radiator, and the outer conductor of the radio frequency coaxial jumper wire is fixedly welded with the feed welding piece.

In some embodiments, the spacing fixing member is provided with a threaded hole along an axial direction, the feed welding member comprises a body portion, a flange portion and a first threaded portion which are sequentially arranged from top to bottom, the first threaded portion is arranged in the second through hole in a penetrating manner and is in threaded connection with the threaded hole, and the body portion and the flange portion are both located below the second through hole.

In some embodiments, the interval fixing member includes a fixing sleeve, the threaded hole is formed on an inner wall of the fixing sleeve, an upper end surface of the fixing sleeve abuts against a bottom surface of the first conical radiator, and the hook is disposed on an outer circumferential surface of the fixing sleeve.

In some embodiments, one end of the hook is connected to the outer circumferential surface of the fixing sleeve, and the other end extends outwards along the radial direction of the fixing sleeve and then bends upwards, and bends at the upper end of the hook to form a hook part, and the hook part is fastened and fixed with one side of the positioning hole, which is close to the center line of the first conical radiator.

In some embodiments, a positioning portion is provided at an upper end of the fixing sleeve, an upper surface of the positioning portion is an inclined surface, and the inclined surface is abutted against an outer side surface of the first conical radiator.

In some embodiments, the outer circumferential surface of the fixed sleeve is further provided with an elastic supporting portion, one end of the elastic supporting portion is fixedly connected with the outer circumferential surface of the fixed sleeve, and the other end of the elastic supporting portion is in downward inclined abutting connection with the second conical radiator.

In some embodiments, the spacer is made of an insulating material, the diameter of the first threaded portion is smaller than the diameter of the second through hole, the lower portion of the fixing sleeve forms a spacer, the outer diameter of the spacer is smaller than the outer diameter of the fixing sleeve, and the spacer is inserted into the second through hole.

In some embodiments, a first isolation gap is provided between an upper end of the first threaded portion and the first conical radiator.

In some embodiments, the mounting hole includes a first mating hole section and a second mating hole section disposed in sequence from top to bottom, the first mating hole section having a diameter greater than a diameter of the second mating hole section.

In some embodiments, one end of the radio frequency coaxial jumper is peeled off layer by layer to sequentially form an outer conductor exposed section, a dielectric layer exposed section and an inner conductor exposed section, the outer conductor exposed section correspondingly penetrates through the first matching hole section, the dielectric layer exposed section correspondingly penetrates through the second matching hole section, and the inner conductor exposed section penetrates through the first through hole and is welded and fixed with the first conical radiator.

In some embodiments, a welding hole is formed in a side wall of the feed welding piece, the welding hole is communicated with the first matching hole section, and soldering tin enters the first matching hole section from the welding hole to be filled between the exposed section of the outer conductor and the hole wall of the first matching hole section.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:

According to the biconical omni-directional ceiling antenna provided by the embodiment of the application, the plurality of clamping hooks on the interval fixing piece are matched with the plurality of positioning holes on the first conical radiator in a clamping manner, so that the first conical radiator is fixed and limited, rotation and displacement of the first conical radiator are avoided, the feeding welding piece is connected with the interval fixing piece, the radio frequency coaxial jumper wire penetrates through the mounting hole on the feeding welding piece, the outer conductor of the radio frequency coaxial jumper wire is welded with the feeding welding piece, the inner conductor of the radio frequency coaxial jumper wire is welded with the first conical radiator, and as the first conical radiator and the second conical radiator are fixed and limited by adopting the interval fixing piece, the inner conductor of the radio frequency coaxial jumper wire is not stressed any more, and the first conical radiator is prevented from being skewed, loosened and falling off of welding spots. The stability of the double-cone omnidirectional ceiling antenna mounting structure is improved, the semi-finished product in production can be effectively fixed without an outer cover or external parts, and the mounting can be directly visually inspected after the mounting is finished, so that the production efficiency and the inspection efficiency are improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a biconic omni-directional ceiling antenna according to an embodiment of the present application;

fig. 2 is a partial view of a biconic omni-directional ceiling antenna according to an embodiment of the present application;

FIG. 3 is a schematic view of a first conical radiator according to an embodiment of the present application;

FIG. 4 is a top view of a first conical radiator according to an embodiment of the application;

FIG. 5 is a top view of a second cone radiator according to an embodiment of the application;

FIG. 6 is a schematic diagram of a second cone radiator according to an embodiment of the application;

FIG. 7 is a top view of a spacer according to an embodiment of the present application;

FIG. 8 is a cross-sectional view taken along line A-A of FIG. 7;

FIG. 9 is a cross-sectional view taken along B-B in FIG. 7;

Fig. 10 is a schematic diagram of a connection structure between a radio frequency coaxial jumper and a feed welding member according to an embodiment of the present application;

fig. 11 is a schematic structural view of a feeding solder member according to an embodiment of the present application.

Wherein, 100, a first conical radiator; 200. a spacing fixture; 300. a second cone-shaped radiator; 400. a feed weld; 500. a radio frequency coaxial jumper; 600. an outer cover; 700. a bottom plate; 101. a first cone portion; 102. a first column portion; 103. a first perforation; 104. positioning holes; 201. a hook; 202. a threaded hole; 203. an elastic support part; 204. a spacer; 205. a positioning part; 206. a transition surface; 301. a second cone portion; 302. a bottom plane; 303. a second perforation; 304. a planar portion; 401. a first threaded portion; 402. a flange portion; 403. welding holes; 404. a second mating bore section; 405. a first mating bore section; 501. a radio frequency coaxial connector; 502. a radio frequency coaxial cable; 5021. an exposed section of the inner conductor; 5022. a dielectric layer exposed section; 5023. the outer conductor exposes the segment.

Detailed Description

In order that the above objects, features and advantages of the application will be more clearly understood, a further description of the application will be made. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the application.

In the structure of the biconical omni-directional ceiling antenna, an upper conical radiator and a coaxial jumper wire are completely fixed by welding of an inner conductor, and the inner conductor of the coaxial jumper wire with 50 ohms is made of copper, the diameter is about 1mm, the strength is weaker, breakage is easy to occur, and meanwhile, as the radius of the upper conical radiator is far more than 1mm, leverage can amplify force, so that a welding point between the inner conductor and the upper conical radiator is fallen off when the upper conical radiator is slightly rotated.

In the traditional scheme, the upper conical radiating body and the lower conical radiating body are not effectively fixed, firstly, the relative rotation between the upper conical radiating body and the lower conical radiating body cannot be effectively prevented, secondly, in the prior art, the distance between the upper conical radiating body and the lower conical radiating body is only controlled to a certain extent, the upper conical radiating body and the lower conical radiating body are prevented from relative displacement only by welding the inner conductors of the coaxial jumper wires, and all forces are concentrated on the inner conductors of the coaxial jumper wires with the thickness of about 1mm, so that the upper conical radiating bodies are easy to skew, loose and fall off.

Although some prior arts adopt a certain technology to locate the conical radiator to a certain extent by using the outer cover or other elastic components, the fixing cannot effectively fix the semi-finished product (uncapped outer cover) in the production process, and the fixing effect cannot be directly visually checked after the outer cover is covered, so that the problem of deflection of the conical radiator cannot be avoided.

In order to solve the technical problem that the strength of a connecting point between an upper conical radiator and an inner conductor of a biconical omni-directional ceiling antenna is weak, the embodiment of the application provides the biconical omni-directional ceiling antenna, which is used for increasing the fixation of the upper conical radiator and avoiding the problem that a welding point between the inner conductor and the upper conical radiator is dropped due to the rotation of the upper conical radiator.

Specifically, as shown in fig. 1 to 11, the embodiment of the present application provides a biconical omni-directional ceiling antenna, which includes a first conical radiator 100, a second conical radiator 300, a spacer fixture 200, a feed-welding member 400, and a radio frequency coaxial patch cord 500; wherein the first cone-shaped radiator 100 and the second cone-shaped radiator 300 are disposed opposite to each other, that is, the conical openings of the first cone-shaped radiator 100 and the second cone-shaped radiator 300 are opposite to each other, in some embodiments, the first cone-shaped radiator 100 is disposed upward, the second cone-shaped radiator 300 is disposed below the first cone-shaped radiator 100, the second cone-shaped radiator 300 is disposed downward, the spacer fixing member 200 is disposed between the first cone-shaped radiator 100 and the second cone-shaped radiator 300, the bottom of the first cone-shaped radiator 100 is provided with a first perforation 103, and the corresponding position of the bottom of the second cone-shaped radiator 300 is provided with a second perforation 303. The bottom of the first cone-shaped radiator 100 and the bottom of the second cone-shaped radiator 300 as referred to herein refer to the bottoms of the cones, for example, the first cone-shaped radiator 100 is disposed upward, the bottom of the first cone-shaped radiator 100 is located at the lowermost end of the first cone-shaped radiator 100, the second cone-shaped radiator 300 is disposed downward, and the bottom of the second cone-shaped radiator 300 is located at the uppermost end of the second cone-shaped radiator 300.

As shown in fig. 3 and 4, the first cone-shaped radiator 100 has a rotationally symmetrical structure, and includes a first cone portion 101 and a first column portion 102, where the first column portion 102 extends upward from an upper end of the first cone portion 101 along an axial direction of the first cone portion 101, a bottom of the first cone portion 101 is a plane, a first through hole 103 is provided on a bottom plane of the first cone portion 101, and a plurality of positioning holes 104 are provided on a conical surface of the first cone portion 101 along a circumferential direction, and in some embodiments of the present application, the number of the positioning holes 104 is 3. The taper angle of the first taper portion 101 is not particularly limited, and is preferably 80 ° to 100 ° in some embodiments of the present application. The first conical radiator 100 is of a thin-wall hollow structure and is formed by processing materials such as aluminum or copper, the surface of the first conical radiator 100 is subjected to electroplating treatment, the surface is smooth, current radiation is facilitated, and intermodulation effect of the antenna is improved.

As shown in fig. 5 and 6, the second cone-shaped radiator 300 has a rotationally symmetrical structure and includes a second cone portion 301 and a plane portion 304, wherein the top portion of the second cone portion 301 extends outward in a direction perpendicular to the axis of the second cone portion 301 to form the plane portion 304, the bottom portion of the second cone portion 301 is a plane, the bottom plane 302 of the second cone portion 301 is provided with a second through hole 303, and the cone angle of the second cone portion 301 is not particularly limited, and is preferably 110 ° to 130 °. The second cone-shaped radiator 300 is of a thin-wall hollow structure and is formed by processing aluminum or copper materials, and the surface is subjected to electroplating treatment, so that the surface is smooth, current radiation is facilitated, and intermodulation effect of the antenna is improved.

The feed welding member 400 includes a body portion, a flange portion 402, and a first screw portion 401 which are sequentially provided, the diameter of the first screw portion 401 is smaller than that of the second through hole 303, the diameter of the second through hole 303 is smaller than that of the flange portion 402, and the first screw portion 401 extends between the first cone-shaped radiator 100 and the second cone-shaped radiator 300 through the second through hole 303; the first threaded portion 401 is provided with external threads, the interval fixing piece 200 is provided with a threaded hole 202 along the axial direction, the threaded hole 202 is sleeved on the first threaded portion 401 and is in threaded fit with the first threaded portion 401, the interval fixing piece 200 is provided with a plurality of clamping hooks 201 along the circumferential direction, the first conical radiator 100 is correspondingly provided with a plurality of positioning holes 104, and the clamping hooks 201 are correspondingly clamped with the positioning holes 104; the feed welding piece 400 is provided with a mounting hole along the axial direction, the radio frequency coaxial jumper 500 is arranged in the mounting hole in a penetrating way, the inner conductor of the radio frequency coaxial jumper 500 is welded with the first conical radiator 100, and the outer conductor of the radio frequency coaxial jumper 500 is welded and fixed with the feed welding piece 400.

The plurality of hooks 201 on the interval fixing piece 200 are matched with the first conical radiator 100 in a clamping way, the threaded holes 202 on the interval fixing piece 200 are matched with the first threaded parts 401 on the feed welding piece 400 in a threaded way to achieve fixed connection, the interval fixing piece 200 fixes the relative positions of the first conical radiator 100 and the second conical radiator 300, the interval between the first conical radiator 100 and the second conical radiator 300 is controlled through the interval fixing piece 200, relative displacement of the first conical radiator 100 and the second conical radiator 300 is prevented, the inner conductor of the radio frequency coaxial jumper 500 is not stressed any more, welding spots between the inner conductor and the first conical radiator 100 are prevented from falling off, and the connection strength is improved. The semi-finished product in the production process can be effectively fixed without the outer cover 600 or external parts, and the phenomena of deflection, loosening or falling off of the first conical radiator 100 are avoided.

It should be noted that, in other embodiments of the present application, the feeding welding member 400 and the spacing fixing member 200 may be connected by other manners, for example, one of the spacing fixing member 200 and the feeding welding member 400 is inserted into the other one in the axial direction, and the two are fixed together by welding.

Further, in some embodiments of the present application, the interval fixing member 200 includes a fixing sleeve, a screw hole 202 is formed on an inner wall of the fixing sleeve, an upper end surface of the fixing sleeve abuts against a bottom surface of the first cone-shaped radiator 100, and a hook 201 is provided on an outer circumferential surface of the fixing sleeve. The fixing sleeve limits the interval between the first cone-shaped radiator 100 and the second cone-shaped radiator 300, and the fastening hooks 201 on the fixing sleeve realize the fixed connection between the fixing sleeve and the first cone-shaped radiator 100, so that the first cone-shaped radiator 100 is prevented from rotating and moving up and down relative to the fixing sleeve.

Specifically, one end of the hook 201 is connected to the outer circumferential surface of the fixing sleeve, and the other end extends outwards along the radial direction of the fixing sleeve and then bends upwards, and a hook portion is formed by bending the upper end of the hook 201, and the hook portion is fastened and fixed to one side of the positioning hole 104, which is close to the center line of the first conical radiator 100. The hooks 201 limit the first conical radiator 100 from above the first conical radiator 100, and the plurality of hooks 201 cooperate to limit the rotation of the first conical radiator 100.

Further, in some embodiments of the present application, the upper end of the fixing sleeve is provided with a positioning portion 205, the upper surface of the positioning portion 205 is an inclined surface, and the inclined surface is abutted against the outer side surface of the first conical radiator 100.

Specifically, the number of the positioning portions 205 is plural, the positioning portions 205 are disposed at intervals along the circumferential direction of the fixed sleeve, the upper surface of the positioning portion 205 is an inclined surface, and the inclination angle of the inclined surface is equal to the angle of the taper angle of the first conical radiator 100, preferably 80 ° to 100 °, and the positioning portions 205 position the first conical radiator 100 at plural positions, respectively, so that the first conical radiator 100 is prevented from moving downward and shifting.

Illustratively, in some embodiments of the present application, the number of the positioning portions 205 is 3, and two adjacent positioning portions 205 are disposed at an angle of 120 degrees.

Further, in some embodiments of the present application, an elastic supporting portion 203 is further disposed on an outer circumferential surface of the fixed sleeve, one end of the elastic supporting portion 203 is fixedly connected to the outer circumferential surface of the fixed sleeve, and the other end of the elastic supporting portion is in downward inclined contact with the second cone-shaped radiator 300.

Specifically, the elastic supporting portion 203 is disposed at a certain angle with the axial direction of the fixing sleeve, the upper end of the elastic supporting portion 203 is fixedly connected with the outer circumferential surface of the fixing sleeve, the lower end of the elastic supporting portion is abutted to the bottom plane of the second conical radiator 300, when the fixing sleeve is installed, the threaded hole 202 of the fixing sleeve is screwed with the first threaded portion 401 of the feed welding piece 400 until the fixing sleeve is abutted to the second conical radiator 300, the elastic supporting portion 203 is tightly matched with the second conical radiator 300, at this time, the elastic supporting portion 203 is in an abutting state with the bottom plane of the second conical radiator 300, the elastic supporting portion 203 is elastically deformed to a certain extent, looseness between the interval fixing piece 200 and the second conical radiator 300 is prevented, and the assembly strength and stability are improved.

The elastic supporting portion 203 has a structure capable of being deformed to a certain extent by force, and when the external force disappears, the elastic supporting portion 203 can be restored to its original state. Specifically, in some embodiments of the present application, the elastic supporting portion 203 is made of the same material as the fixing sleeve and is integrally formed. The elastic supporting portion 203 can play a role in preventing loosening of threads, that is, the long-term use can lead to loosening between the threaded hole 202 and the first threaded portion 401, so that stability of a connecting structure is affected, and the elastic supporting portion 203 can still play a good fixing effect on the space fixing member 200 and the second conical radiator 300 after the matching between the threaded hole 202 and the first threaded hole 202 is problematic, so that abnormal electrical performance and intermodulation indexes caused by long-term use are avoided.

In some prior art techniques, a cone-shaped radiator is used to partially rivet a tin-plated tubular rivet and then welded to the inner (outer) conductor of the feed weld 400, forming a sandwich structure between the tubular rivet and the cone-shaped radiator with multiple metal-to-metal interfaces. Another prior art approach uses an externally threaded weld to weld with the inner (outer) conductor of the feed weld 400, but uses a metal nut to secure the cone-shaped radiator and the weld, thereby forming multiple metal-to-metal interfaces of the metal nut and cone-shaped radiator, the weld and cone-shaped radiator, and the weld and cone via. The contact surface is easy to cause local nonlinear contact, so that intermodulation products are generated, and intermodulation indexes of the antenna are affected.

Referring to fig. 7 to 9, in order to solve the problem that the intermodulation index of the antenna is affected by too many nonlinear contact surfaces between metal and metal in the fixing structure of the biconical omni-directional ceiling antenna, in some embodiments of the present application, a spacer 204 is formed at the lower part of the fixing sleeve, the outer diameter of the spacer 204 is smaller than the outer diameter of the fixing sleeve, and the spacer 204 is inserted into the second through hole 303.

Specifically, the outer circumferential surface of the lower portion of the fixing sleeve is annularly cut to form the spacing portion 204, the spacing portion 204 is connected with the outer circumferential surface of the fixing sleeve through the transition surface 206, when the fixing sleeve is installed, the threaded hole 202 on the spacing fixing piece 200 is screwed with the first threaded portion 401 on the feed welding piece 400 until the transition surface 206 abuts against the bottom plane of the second conical radiator 300, at this time, the spacing portion 204 stretches into the second through hole 303, the first threaded portion 401 is isolated from the second conical radiator 300, and unnecessary metal-to-metal contact is avoided.

The spacer 200 is made of an insulating material, so that not only the first conical radiator 100 can be positioned, but also intermodulation risks caused when the spacer 200 contacts the first conical radiator 100 and the second conical radiator 300 can be avoided.

Further, in some embodiments of the present application, a first isolation gap is formed between the upper end of the first threaded portion 401 and the first conical radiator 100, and since the feed welding member 400 is a metal member, a certain distance is maintained between the upper end of the first threaded portion 401 and the first conical radiator 100 after the installation is completed, that is, the first isolation gap is provided, contact between the feed welding member 400 and the first conical radiator 100 can be avoided, and intermodulation risk is reduced.

Specifically, the length of the first threaded portion 401 is smaller than the length of the threaded hole 202, and after the first threaded portion 401 is screwed into the threaded hole 202, the upper end of the first threaded portion 401 is still hidden in the internal threaded hole 202, and since the upper end surface of the fixing sleeve abuts against the bottom plane of the first tapered radiator 100, a first isolation gap is formed between the upper end of the first threaded portion 401 and the first tapered radiator 100.

Furthermore, the length of the spacer 204 is smaller than the length of the second through hole 303, the diameter of the spacer 204 is smaller than the diameter of the second through hole 303, the outer diameter of the fixing sleeve is larger than the diameter of the second through hole 303, after the fixing sleeve is completely installed, the spacer 204 is penetrated in the second through hole 303, the transition surface 206 is abutted against the bottom plane of the second cone-shaped radiator 300, and gaps are formed between the spacer 204 and the hole wall of the second through hole 303 and between the spacer 204 and the flange 402 of the feed welding member 400, so that the fixing sleeve is convenient for installing the spacer 204 and mutual interference in the installation process is avoided.

Further, in some embodiments of the present application, the mounting hole includes a first mating hole section 405 and a second mating hole section 404, the first mating hole section 405 has a larger diameter than the second mating hole section 404, the first mating hole section 405 is disposed corresponding to the body portion, and the second mating hole section 404 is disposed corresponding to the flange portion 402 and the first threaded hole 202.

Specifically, the rf coaxial jumper 500 includes an rf coaxial connector 501 and an rf coaxial cable 502, where the rf coaxial cable 502 includes, from outside to inside, an outer conductor layer (mesh conductive layer), a dielectric layer (insulating layer) and an inner conductor layer (central copper wire) in sequence, the rf coaxial connector 501 is connected to one end of the rf coaxial cable 502, and the other end (the end far away from the rf coaxial connector 501) of the rf coaxial cable 502 is peeled off layer by layer to form, in sequence, an outer conductor exposed section 5023, a dielectric layer exposed section 5022 and an inner conductor exposed section 5021, where the length of the first mating hole section 405 is smaller than the length of the outer conductor exposed section 5023, the diameter of the first mating hole section 405 is larger than the diameter of the outer conductor exposed section 5023, the diameter of the second mating hole section 404 is larger than or equal to the diameter of the dielectric layer exposed section 5022, and the length of the second mating hole section 404 is smaller than or equal to the length of the dielectric layer exposed section 5022. The exposed section 5023 of the outer conductor correspondingly passes through the first matching hole section 405, the exposed section 5022 of the dielectric layer correspondingly passes through the second matching hole section 404, and the exposed section 5021 of the inner conductor passes through the first perforation 103 and is welded and fixed with the first conical radiator 100 after passing out of the second matching hole section 404. Because the diameter of the first mating hole segment 405 is greater than the diameter of the second mating hole segment 404, a step is formed at the junction of the first mating hole segment 405 and the second mating hole segment 404, which step is used to limit the exposed segment 5023 of the outer conductor.

The first matching hole section 405 and the second matching hole section 404 are used for positioning the exposed section 5023 of the outer conductor and the exposed section 5022 of the dielectric layer respectively, a gap is formed between the exposed section 5023 of the outer conductor and the hole wall of the first matching hole section 405, the exposed section 5023 of the outer conductor is welded with the feed welding piece 400 at the position of the first matching hole section 405, and further the electric connection between the outer conductor and the feed welding piece 400 is realized.

Specifically, a welding hole 403 is formed in the side wall of the body, the welding hole 403 is communicated with the first matching hole section 405, soldering tin enters the first matching hole section 405 from the welding hole 403 to be filled between the exposed section 5023 of the outer conductor and the inner wall of the first matching hole section 405, and welding fixation of the exposed section 5023 of the outer conductor and the feeding welding piece 400 is achieved. Solder is added between the exposed section 5023 of the outer conductor and the hole wall of the first matching hole section 405 through the welding hole 403, and after welding, the solder can be completely filled in the gap between the exposed section 5023 of the outer conductor and the first matching hole section 405, so that the welding between the exposed section 5023 of the outer conductor and the feed welding piece 400 is more uniform.

The surface of the first conical radiator 100 is directly welded with the exposed section 5021 of the inner conductor by electroplating, so that a sandwich structure formed by tubular rivets is reduced, and the contact surface between metals is further reduced.

As shown in fig. 1, the dual-cone omnidirectional ceiling antenna provided by the embodiment of the application further comprises a radome and a bottom plate 700, wherein the opening of the second cone radiator 300 faces the bottom plate 700, the radome is covered on the first cone radiator 100 and the second cone radiator 300 above the first cone radiator 100, the radome is fixedly connected with the bottom plate 700, the first cone radiator 100 and the second cone radiator 300 are sealed in a mounting cavity formed by the radome and the bottom plate 700, and the radome and the bottom plate 700 play a role in protecting and supporting the first cone radiator 100 and the second cone radiator 300.

The biconical omni-directional ceiling antenna provided by the embodiment of the application has the following advantages:

1. improving stability of antenna structure, pattern and circuit index

The interval fixing piece 200 made of insulating materials is used for fixing and limiting the first conical radiator 100 through the matching of the positioning part 205 and the first conical part 101 and the matching of the clamping hook 201 and the positioning hole 104, the interval fixing piece 200 is used for fixing and limiting the second conical radiator 300 through the screwing of the first threaded part 401 on the feed welding part and the abutting of the elastic supporting part 203 and the second conical part 301, the first conical radiator 100 and the second conical radiator 300 are further fixedly connected together, the rib position or other structural parts on the outer cover 600 are not needed to be utilized for improving the stability center of the structure, stress is prevented from being concentrated on the inner conductor of the feed welding piece 400, the problems of relative deflection and loosening of the first conical radiator 100 and the second conical radiator 300 and the falling of welding spots between the inner conductor and the first conical radiator 100 are avoided, a good fixing effect is achieved, and the structural stability can be checked visually.

2. Improving intermodulation index of antenna

The first thread part 401 of the spacer fixing member 200 made of insulating material and the first conical radiator 100 have a first isolation gap therebetween, and the spacer 204 extends into the second through hole 303 to isolate the first thread part 401 from the second through hole 303, so that the contact surface between metal and metal is reduced, and the intermodulation index of the antenna is improved.

3. Improving the production efficiency of the antenna

The first conical radiator 100 and the second conical radiator 300 are fixed and limited by using the interval fixing piece 200, the first conical radiator 100 and the second conical radiator 300 do not need to be fixed and limited by using a tool during production, semi-finished products do not need to be protected, and the production efficiency is improved.

It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (11)

1. The double-cone omnidirectional ceiling antenna is characterized by comprising a first cone-shaped radiator (100), a second cone-shaped radiator (300), a spacing fixing piece (200), a feed welding piece (400) and a radio frequency coaxial jumper (500), wherein the first cone-shaped radiator (100) and the second cone-shaped radiator (300) are arranged in a back direction; a first perforation (103) is arranged at the bottom of the first conical radiator (100), and a second perforation (303) is arranged at a corresponding position of the bottom of the second conical radiator (300);

The interval fixing piece (200) is arranged between the first conical radiator (100) and the second conical radiator (300), a plurality of clamping hooks (201) are arranged on the interval fixing piece (200) along the circumferential direction, a plurality of positioning holes (104) are correspondingly arranged on the first conical radiator (100), and the clamping hooks (201) are correspondingly clamped with the positioning holes (104);

The upper end of the feed welding piece (400) passes through the second perforation (303) from bottom to top and then is connected with the interval fixing piece (200); the feed welding piece (400) is provided with a mounting hole along the axial direction, the radio frequency coaxial jumper (500) is arranged in the mounting hole in a penetrating mode, the inner conductor of the radio frequency coaxial jumper (500) is fixedly welded with the first conical radiator (100), and the outer conductor of the radio frequency coaxial jumper (500) is fixedly welded with the feed welding piece (400).

2. The biconical omni-directional ceiling antenna according to claim 1, wherein the spacer fixture (200) is provided with a threaded hole (202) along an axial direction, the feed welding member (400) comprises a body portion, a flange portion (402) and a first threaded portion (401) which are sequentially arranged from top to bottom, the first threaded portion (401) is inserted into the second through hole (303) and is in threaded connection with the threaded hole (202), and the body portion and the flange portion (402) are both located below the second through hole (303).

3. The biconical omni-directional ceiling antenna according to claim 2, wherein the interval fixing member (200) comprises a fixing sleeve, the screw hole (202) is formed on an inner wall of the fixing sleeve, an upper end surface of the fixing sleeve abuts against a bottom surface of the first conical radiator (100), and the hook (201) is disposed on an outer circumferential surface of the fixing sleeve.

4. A biconical omni-directional ceiling antenna according to claim 3, wherein one end of the hook (201) is connected to an outer circumferential surface of the fixing sleeve, and the other end extends radially outward of the fixing sleeve and then bends upward, and a hook portion is formed by bending an upper end of the hook (201), and the hook portion is fastened to a side of the positioning hole (104) close to a center line of the first conical radiator (100).

5. The biconical omni-directional ceiling antenna according to claim 3, wherein a positioning portion (205) is provided at an upper end of the fixing sleeve, an upper surface of the positioning portion (205) is an inclined surface, and the inclined surface is abutted against an outer side surface of the first conical radiator (100).

6. A biconical omni-directional ceiling antenna according to claim 3, wherein the outer circumferential surface of the fixed sleeve is further provided with an elastic supporting portion (203), one end of the elastic supporting portion (203) is fixedly connected with the outer circumferential surface of the fixed sleeve, and the other end of the elastic supporting portion is in downward tilting abutment with the second conical radiator (300).

7. A biconical omni-directional ceiling antenna according to claim 3, wherein the spacer fixing member (200) is made of an insulating material, the diameter of the first threaded portion (401) is smaller than the diameter of the second perforated hole (303), a spacer portion (204) is formed at a lower portion of the fixing sleeve, an outer diameter of the spacer portion (204) is smaller than an outer diameter of the fixing sleeve, and the spacer portion (204) is inserted into the second perforated hole (303).

8. The biconical omni-directional ceiling antenna according to claim 2, wherein the upper end of the first threaded portion (401) has a first isolation gap with the first conical radiator (100).

9. The biconical omni-directional ceiling antenna according to claim 1, wherein the mounting hole comprises a first mating hole section (405) and a second mating hole section (404) sequentially disposed from top to bottom, the diameter of the first mating hole section (405) being greater than the diameter of the second mating hole section (404).

10. The biconical omni-directional ceiling antenna according to claim 9, wherein one end of the radio-frequency coaxial jumper (500) is peeled off layer by layer to sequentially form an outer conductor exposed section (5023), a dielectric layer exposed section (5022) and an inner conductor exposed section (5021), the outer conductor exposed section (5023) is correspondingly penetrated in the first matching hole section (405), the dielectric layer exposed section (5022) is correspondingly penetrated in the second matching hole section (404), and the inner conductor exposed section (5021) penetrates through the first perforation (103) and is welded and fixed with the first conical radiator (100).

11. The biconical omni-directional ceiling antenna according to claim 10, wherein a welding hole (403) is formed in a side wall of the feeding welding member, the welding hole (403) is communicated with the first matching hole section (405), and solder enters the first matching hole section (405) from the welding hole (403) and is filled between the exposed outer conductor section (5023) and a hole wall of the first matching hole section (405).