CN211879608U

CN211879608U - Antenna

Info

Publication number: CN211879608U
Application number: CN202020455638.5U
Authority: CN
Inventors: 邓翼; 王晓辉; 郭奇松
Original assignee: Harxon Corp
Current assignee: Harxon Corp
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-11-06
Anticipated expiration: 2030-03-31

Abstract

The utility model discloses an antenna belongs to antenna technical field. The utility model discloses an antenna includes that inner core, cover are located the outer metal conducting layer of inner core and set up in the inner core with dielectric layer between the metal conducting layer, the end connection of inner core has first antenna radiating element, the metal conducting layer overcoat is equipped with second antenna radiating element, second antenna radiating element with the metal conducting layer short circuit, wherein, first antenna radiating element is used for producing the resonance of first predetermined frequency channel, second antenna radiating element is used for producing the resonance of second predetermined frequency channel. The utility model discloses an antenna not only can be integrated on an antenna with the radiating element of two Wifi signal frequency channels to support two signal frequency channels simultaneously, can also ensure the miniaturization of antenna.

Description

Antenna

Technical Field

The utility model relates to an antenna technology field, concretely relates to antenna.

Background

Wifi (Wireless Fidelity) is a technology that allows an electronic device to connect to a Wireless local area network, and transmission and reception of Wireless signals are mainly achieved through an antenna.

The conventional Wifi antenna mainly uses a single frequency band for transmitting and receiving signals, such as a 2.4GHz frequency band. With the rapid popularization and promotion of Wifi, the antenna with a single frequency band is difficult to meet the requirements of people, and therefore, the industry and the information department release a new frequency band use standard, and the frequency band of 5GHz is increased while the previous 2.4GHz frequency band is used, so that the faster internet speed is obtained.

However, the Wifi antenna in the market at present mainly supports the 2.4GHz band and the 5GHz band by providing two antennas, such as some broadband routers, which support two Wifi bands of 2.4GHz and 5GHz simultaneously, but the Wifi antenna is an antenna with two separate independent bands, and some Wifi communication devices integrate the two Wifi bands on one antenna, but it significantly increases the size of the antenna, and for some devices requiring miniaturization, the antenna is difficult to be applied, such as a small GNSS handheld device, which does not have a redundant space to place a redundant antenna or a larger antenna.

Therefore, it is necessary to provide an antenna capable of supporting two frequency bands, such as two frequency bands of 2.4GHz and 5GHz, and ensuring a small size.

SUMMERY OF THE UTILITY MODEL

In order to solve the deficiency of the prior art, the embodiment of the utility model provides a can support two frequency channels, for example support the antenna of two Wifi frequency channels of 2.4GHz and 5GHz simultaneously.

Another object of the present invention is to provide an antenna capable of supporting two frequency bands and ensuring a smaller size.

In order to achieve the above object, an embodiment of the present invention provides an antenna, locate including inner core, cover the outer metallic conduction layer of inner core and set up in the inner core with dielectric layer between the metallic conduction layer, the end connection of inner core has first antenna radiation unit, the outer cover of metallic conduction layer is equipped with second antenna radiation unit, second antenna radiation unit with the metallic conduction layer short circuit, wherein, first antenna radiation unit is used for producing the resonance of first predetermined frequency channel, second antenna radiation unit is used for producing the resonance of second predetermined frequency channel.

Optionally, the inner core is arranged insulated from the metal conductive layer to form an open circuit.

Optionally, the first antenna radiating element is formed by extending the inner core along an axial direction.

Optionally, the first preset frequency band includes a 2.4GHz frequency band, and the second preset frequency band includes a 5GHz frequency band.

Optionally, the dielectric layer is an air dielectric or a solid dielectric with a dielectric constant greater than that of air.

Optionally, the second antenna radiation unit includes along first tubular metal resonator and the second tubular metal resonator that the axis direction of metal conducting layer set gradually, first tubular metal resonator produces the resonance of the third frequency channel of predetermineeing, the second tubular metal resonator produces the resonance of the fourth frequency channel of predetermineeing, the third frequency channel of predetermineeing with the fourth frequency channel of predetermineeing is located the second is predetermineeing the frequency channel.

Optionally, the third preset frequency band and the fourth preset frequency band are overlapped to cover a full frequency band of the second preset frequency band.

Optionally, the first metal tube and/or the second metal tube is a copper tube.

Optionally, the first metal pipe and the second metal pipe are connected by screw threads or welded to each other.

Optionally, the length of the first metal tube is smaller than the length of the second metal tube, and the diameter of the first metal tube is larger than the diameter of the second metal tube.

The utility model has the advantages that:

the utility model provides an antenna, locate including inner core, cover the outer metallic conduction layer of inner core and set up in the inner core with dielectric layer between the metallic conduction layer, the surface cover of metallic conduction layer is equipped with second antenna radiating element, second antenna radiating element with the metallic conduction layer short circuit, the end connection of inner core has antenna radiating element, antenna radiating element is used for producing the resonance of first predetermined frequency channel, second antenna radiating element is used for producing the resonance that the second predetermined frequency channel. The utility model discloses an antenna realizes that an antenna supports two different frequency channels simultaneously to faster last network speed has been obtained.

Furthermore, the utility model discloses an antenna, simple structure, preparation convenience, the integrated level is high, and the size is little, can use the occasion strict to the miniaturized requirement of antenna.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic diagram of an overall structure of an antenna according to an embodiment of the present invention;

fig. 2 is a schematic diagram of the disassembled structure of fig. 1.

Wherein the corresponding relations between the reference numbers and the names of the components in fig. 1 and 2 are as follows:

1. an inner core; 10. a first antenna radiating element; 2. a metal conductive layer; 3. a dielectric layer; 4. a first metal tube; 5. a second metal tube.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

As shown in fig. 1 and 2, fig. 1 shows an overall structure schematic diagram of an antenna according to an embodiment of the present invention, fig. 2 shows a split structure schematic diagram of fig. 1, please refer to fig. 1 and 2 together, an embodiment of the present invention provides an antenna, including an inner core 1, a metal conductive layer 2, a dielectric layer 3, and a second antenna radiation unit. It should be noted herein that the antenna illustrated in the drawings and described in the present specification is merely one example of the many types of antennas that can employ the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any details of the antenna or any components of the antenna shown in the drawings or described in the present specification.

Referring to the drawings, in the exemplary embodiment of the present invention, the dielectric layer 3 and the metal conductive layer 2 are sequentially sleeved on the inner core 1, the dielectric layer 3 is located between the metal conductive layer 2 and the inner core 1, the dielectric layer 3 and the metal conductive layer 2 form a coaxial cable, and are used for being connected with the feed input end to transmit signals and energy during operation. The second antenna radiation unit is arranged outside the metal conducting layer 2 in a sleeved mode, the second antenna radiation unit is in short circuit with the metal conducting layer 2, the end portion of the inner core 1 is connected with the first antenna radiation unit 10, after the coaxial cable is connected with the feed input end, feed signals are transmitted through the coaxial cable, a branch is formed at the top end of the coaxial cable, a part of signals are transmitted to the second antenna radiation unit 10, and a part of signals are transmitted to the second antenna radiation unit, wherein the first antenna radiation unit 10 is used for generating resonance of a first preset frequency band, and the second antenna radiation unit is used for generating resonance of a second preset frequency band.

The first antenna radiating element 10 may be, but not limited to, an elongated copper tube, an aluminum alloy tube, an iron tube, etc., and optionally, the first antenna radiating element 10 is formed by extending the inner core 1 along the axial direction thereof, that is, the antenna radiating element 10 is a part of the inner core 1, the difference between the two is that the first antenna radiating element is used for generating resonance of a first preset frequency band, and the inner core 1 corresponding to the metal conductive layer 2 is used for transmitting a signal of a feed input end.

In one embodiment, at the top end of the coaxial cable, the inner core 1 is shorted with the metal conductive layer 2, and at this time, the coaxial cable forms a loop, the signals received by the first antenna radiation unit 10 and the second antenna radiation unit are substantially the same, and the antenna as a whole is a monopole antenna capable of supporting two different frequency bands.

In an alternative embodiment, the inner core 1 is insulated from the metallic conductive layer 2 to form an open circuit. In this embodiment, the signal of the first antenna radiating element 10 is transmitted through the inner core 1, the signal of the second antenna radiating element is transmitted through the metal conductive layer 2, the phase difference between the two signals is 180 degrees, and the antenna is a dipole antenna capable of supporting two different frequency bands as a whole.

In one embodiment, the dielectric layer 3 may be selected to be an air dielectric. Alternatively, the bottom ends of the inner core 1 and the metal conductive layer 2 may be fixedly disposed, for example, the metal conductive layer 2 or the bottom end of the inner core 1 is soldered to the circuit board at the power input end, so that the inner core 1, the metal conductive layer 2 and the dielectric layer 3 maintain the relative structural relationship.

In alternative embodiments, the metal conductive layer 2 can be selected from, but not limited to, a metal circular tube, a circular tube with longitudinal seams, a woven mesh, and the like.

In an alternative embodiment, the dielectric layer 3 is a solid medium with a dielectric constant greater than that of air, and optionally, the dielectric layer 3 may be a polyethylene medium, a polyvinyl chloride medium, or the like. In this embodiment, the dielectric layer 3 may reduce the resonant frequency of the antenna radiation unit, thereby reducing the size of the antenna. It should be known to those skilled in the art that the resonant frequency of the antenna radiating element is related to the length of the antenna radiating element, and generally, the longer the length of the antenna radiating element, the smaller the resonant frequency, in this embodiment, the dielectric layer 3 is interposed on the antenna radiating element, so as to properly reduce the resonant frequency of the antenna radiating element, so that the antenna radiating element can reach the ideal resonant frequency when the length is smaller, and of course, the dielectric layer 3 will have a negative effect: certain damage is brought to the antenna, and the electrical performance of the antenna is affected. Therefore, in the present embodiment, the resonant frequency of the antenna radiation unit is not lowered without limitation to reduce the size of the antenna, but the resonant frequency of the antenna radiation unit is lowered appropriately to achieve coordination between the reduction in the size of the antenna and the reduction in the electrical performance, and the relative relationship between the specific antenna size reduction value and the electrical performance reduction value can be obtained through practical debugging.

The embodiment of the utility model provides an in, two antenna radiation units have been integrated on the antenna, are used for producing the resonance of the first resonance of predetermineeing the frequency channel, the resonance of the second predetermined frequency channel respectively, make an antenna support two frequency channels to improve the performance of antenna. When one antenna supports two frequency bands, the miniaturization of the antenna can be ensured, and the antenna is favorably applied to various occasions with strict requirements on the volume.

Taking a Wifi antenna as an example, the Wifi antenna generally works with two frequency bands, one is a 2.4GHz band (2.4 GHz-2.48 GHz), and the other is a 5GHz band (5.17 GHz-5.85 GHz). In an optional embodiment, the first antenna radiating unit 10 is selected to generate a resonance in a 2.4GHz band, the second antenna radiating unit is selected to generate a resonance in a 5GHz band, and the 2.4GHz band and the 5GHz band are two large bands for Wifi signal transmission.

In one embodiment, the second antenna radiation unit comprises a first metal tube 4 and a second metal tube 5 which are arranged in sequence along the axial direction of the coaxial cable. The first metal tube 4 and the second metal tube 5 are respectively connected with the metal conducting layer 2, and the first metal tube 4 and the second metal tube 5 jointly form an antenna radiation unit for generating resonance of a second preset frequency band.

In a conventional antenna, only one second antenna radiation unit is generally used to generate resonance of a second preset frequency band, for example, only one first metal tube or one second metal tube is used, the frequency band bandwidth of the antenna is relatively narrow, and the performance of the antenna is poor. Compared with the prior art, in the embodiment, the first metal tube 4 and the second metal tube 5 which are sequentially arranged along the axial direction of the inner core 1 are used as the radiation antenna unit of the second preset frequency band. Specifically, the first metal tube 4 generates a resonance of a third preset frequency band, the second metal tube 5 generates a resonance of a fourth preset frequency band, and the third preset frequency band and the fourth preset frequency band are both located in a second preset frequency band range, wherein the third preset frequency band is a smaller frequency band bandwidth in the second preset frequency band range, the fourth preset frequency band is a higher frequency band bandwidth in the second preset frequency band range, and when the first metal tube 4 and the second metal tube 5 work, the first metal tube 4 and the second metal tube 5 are mutually matched and overlapped, so that the first preset frequency band and the second preset frequency band cover the whole second preset frequency band range, and the antenna is ensured to have good electrical characteristics in the whole 5GHz frequency band range.

Taking a Wifi antenna as an example for explanation, a specific frequency range of a 5GHz frequency band of a Wifi signal is approximately 5.15 GHz-5.85 GHz, a bandwidth of a resonant frequency generated by one second antenna radiation unit is limited, and the bandwidth of the whole 5GHz frequency band cannot be covered under normal circumstances, so that, within the bandwidth range which cannot be covered by the second antenna radiation unit, impedance matching of the antenna radiation unit (the second antenna radiation unit) is poor, energy utilization rate is low, and a standing wave value in the frequency band bandwidth is high, so that the antenna radiation unit can only be applied to some occasions with low requirements on the signal. In this embodiment, the first metal tube 4 and the second metal tube 5 respectively act in different frequency ranges, such as: the frequency band range of the resonant frequency of the first metal tube 4 is 5.5 GHz-5.85 GHz, and the frequency band range of the resonant frequency of the second metal tube 5 is 5.17 GHz-5.5 GHz, so that when the antenna works, the first metal tube 4 and the second metal tube 5 can achieve the effects of mutual superposition and promotion, thereby expanding the bandwidth of the second antenna radiation unit and improving the electrical performance of the antenna.

It will be appreciated that the resonant frequency of the second antenna radiating element is related to the dimensions, such as length and diameter, of the second antenna radiating element. In this embodiment, in order to make the resonant frequency of the first metal tube 4 be located in a higher frequency range, the resonant frequency of the second metal tube 5 be located in a lower frequency range, the length of the second metal tube 5 is set to be greater than the length of the first metal tube 4, when the length of the second metal tube 5 is longer, the resonant frequency of the second metal tube 5 is smaller, so that when the frequency range of the resonant frequency of the first metal tube 4 is the higher frequency range of the 5GHz frequency range, the frequency range of the resonant frequency of the second metal tube 5 is the lower frequency range of the 5GHz frequency range. In addition, the diameter of the first metal tube 4 can be set to be larger than that of the second metal tube 5, so that when the frequency band range of the resonant frequency of the first metal tube 4 is the higher frequency band range of the 5GHz frequency band, the frequency band range of the resonant frequency of the second metal tube 5 is the lower frequency band range of the 5GHz frequency band.

In a preferred embodiment, the frequency band range of the resonant frequency of the first metal tube 4 and the second metal tube 5 should cover the entire range of the 5GHz frequency band. To this end, in an alternative embodiment, the length of the first metal tube 4 may be chosen to be 8mm and the length of the second metal tube 5 may be chosen to be 10mm, and correspondingly, the diameter of the first metal tube 4 may be chosen to be a hollow metal tube with a diameter of 6mm and a wall thickness of 0.5mm, and the diameter of the second metal tube 5 may be chosen to be a hollow metal tube with a diameter of 4mm and a wall thickness of 0.5 mm. In this embodiment, the resonant frequency ranges of the first metal tube 4 and the second metal tube 5 can cover the whole range of 5GHz frequency band, and the frequency band range of the resonant frequency of the first metal tube 4 partially overlaps with the frequency band range of the resonant frequency of the second metal tube 5, so as to ensure the whole electrical performance of the antenna, and in addition, the first metal tube 4 and the second metal tube 5 are selected as hollow metal tubes, so as to reduce the whole weight of the antenna.

Of course, in different embodiments, other numbers of antenna radiating elements are possible, such as adding a third metal tube, based on the above principle. At this time, the first metal tube, the second metal tube and the third metal tube are respectively connected to the metal conductive layer, so that the first metal tube, the second metal tube and the third metal tube together form a 5GHz band radiation antenna unit, by adjusting the sizes of the first metal tube, the second metal tube and the third metal tube, the resonant frequencies of the first metal tube, the second metal tube and the third metal tube are located in the second preset frequency band range, and the resonant frequencies of the first metal tube, the second metal tube and the third metal tube are overlapped to cover the whole second preset frequency band, so as to ensure that the antenna has good electrical performance in the whole second preset frequency band, optionally, in an alternative embodiment, the number of the metal tubes can be further increased, but it is considered that the schemes are routine transformations of the antenna provided by the embodiments of the present invention, and should fall within the protection scope of the present invention, moreover, if the number of metal tubes is too large, the electrical performance of the antenna may be correspondingly degraded.

In an alternative embodiment, the first metal tube 4 and/or the second metal tube 5 may be a copper tube, an aluminum alloy tube, an iron tube, or the like, wherein in the embodiment, the first metal tube 4 and the second metal tube 5 are preferably copper tubes.

In order to ensure the connection between the first metal tube 4 and the second metal tube 5, in an embodiment, the first metal tube 4 and the second metal tube 5 are connected to each other through a threaded structure, in an alternative embodiment, the ends of the first metal tube 4 and the second metal tube 5 may also be welded to achieve the connection between the two, of course, in different embodiments, the two may also be fastened through other connection structures, such as screws, buckles, and the like.

The utility model discloses to above-mentioned Wifi antenna, the applicant has carried out corresponding capability test. The utility model discloses antenna can cover 2.4GHz ~ 2.48GHz and 5.17GHz ~ 5.85GHz two big Wifi frequency channels simultaneously, and satisfies: the VSWR of the standing wave in the frequency band bandwidth of 2.4 GHz-2.48 GHz is less than or equal to 2, the gain in the frequency band bandwidth is greater than or equal to 1dbi, the VSWR of the standing wave in the frequency band bandwidth of 5.17 GHz-5.85 GHz is less than or equal to 2.5, and the gain in the frequency band bandwidth is greater than or equal to 1.5 dbi. It is visible, the utility model discloses the antenna not only can support two frequency channels of 2.4GHz individual 5GHz simultaneously, can also guarantee good electric property in these two frequency channels.

In addition, referring to fig. 1 and fig. 2, taking a Wifi antenna as an example, in order to support two frequency bands of 2.4GHz and 5GHz simultaneously, although one antenna radiation unit is added, the size of the antenna is not increased correspondingly as a whole, because in this embodiment, the structure of the coaxial cable itself is ingeniously used to add the antenna radiation unit, the inner core 1 of the coaxial cable belongs to the structure that the coaxial cable itself has, and in a case that the antenna radiation unit is not added, the structure of the inner core 1 also exists, in this embodiment, in order to realize transceiving of signals in the 2.4GHz frequency band, an extension part of the inner core 1 is used as the first antenna radiation unit 10, so that the resonant frequency of the first antenna radiation unit 10 covers the 2.4GHz frequency band. The first antenna radiation unit 10 is connected with the second antenna radiation unit through a coaxial cable structure consisting of the inner core 1, the metal conducting layer 2 and the dielectric layer 3, and is connected with the feed input end through the coaxial cable structure during working so as to transmit a signal transmitted by the feed input end in a radiation mode, so that the normal work of the first antenna radiation unit 10 and the second antenna radiation unit can be realized only by connecting one feed input end with the coaxial cable, and further, the integral size of the antenna is reduced.

Based on the technical scheme that this writing embodiment provided, the utility model discloses the antenna can support two frequency channels simultaneously, can also do benefit to the miniaturized design of antenna, is in the occasion to antenna size requirement stricter, the utility model discloses the antenna has apparent advantage, like miniature GNSS handheld device, and it does not have unnecessary space to place a plurality of antennas, is equivalent to in its original spatial range, can additionally increase an antenna, obviously can show to its performance and strengthen.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides an antenna, its characterized in that includes the inner core, the cover is located outer metal conducting layer of inner core and set up in the inner core with dielectric layer between the metal conducting layer, the end connection of inner core has first antenna radiating element, the metal conducting layer overcoat is equipped with second antenna radiating element, second antenna radiating element with the metal conducting layer short circuit, wherein, first antenna radiating element is used for producing the resonance of first predetermined frequency channel, second antenna radiating element is used for producing the resonance of second predetermined frequency channel.

2. The antenna of claim 1, wherein the inner core is disposed in insulation with the metallic conductive layer to form an open circuit.

3. The antenna of claim 1, wherein the first antenna radiating element is formed by extending the inner core in an axial direction.

4. The antenna of claim 1, wherein the first predetermined frequency band comprises a 2.4GHz frequency band, and wherein the second predetermined frequency band comprises a 5GHz frequency band.

5. The antenna of claim 1, wherein the dielectric layer is an air dielectric or a solid dielectric with a dielectric constant greater than that of air.

6. The antenna according to any one of claims 1 to 5, wherein the second antenna radiation unit includes a first metal tube and a second metal tube sequentially disposed along an axial direction of the metal conductive layer, the first metal tube generates a resonance of a third preset frequency band, the second metal tube generates a resonance of a fourth preset frequency band, and the third preset frequency band and the fourth preset frequency band are located in the second preset frequency band.

7. The antenna of claim 6, wherein the third predetermined frequency band and the fourth predetermined frequency band are overlapped to cover a full frequency band of the second predetermined frequency band.

8. The antenna of claim 6, wherein the first metal tube and/or the second metal tube is a copper tube.

9. The antenna of claim 6, wherein the first metal tube and the second metal tube are connected by threads or welded to each other.

10. The antenna of claim 6, wherein the first metal tube has a length less than a length of the second metal tube, and wherein the first metal tube has a diameter greater than a diameter of the second metal tube.