CN217589429U

CN217589429U - Common-ground dual-WiFi antenna

Info

Publication number: CN217589429U
Application number: CN202221221742.3U
Authority: CN
Inventors: 陈鹏; 闭业智
Original assignee: Shenzhen Zhuorui Communication Technology Co ltd
Current assignee: Shenzhen Zhuorui Communication Technology Co ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-10-14
Anticipated expiration: 2032-05-20

Abstract

The utility model provides a common-ground dual-WiFi antenna, which is characterized in that the common-ground dual-WiFi antenna comprises a first WiFi antenna, a second WiFi antenna and a grounding strip; the first WiFi antenna comprises a first radiation branch, a first spiral spring structure, a first feeding point, a first grounding point and a first cable line; the second WiFi antenna comprises a second radiation branch, a second spiral spring structure, a second feeding point, a second grounding point and a second cable line; the single WiFi antenna is provided with the radiation branches extending in the opposite direction, so that different radiation directions of each WiFi antenna can be realized, complementation is formed, and the radiation range of the antenna is enlarged; the scheme of sharing the grounding strip is adopted to realize the size miniaturization design of the double antennas, the two WiFi single antennas are arranged in a mirror image manner, the effect of sharing the ground is realized through the grounding strip, and no extra space is occupied; and because the structures and the sizes of the single WiFi antennas are completely the same, the design cost and the manufacturing cost can be saved in the production and manufacturing process.

Description

Common-ground dual-WiFi antenna

Technical Field

The utility model relates to a wireless communication field, in particular to design of two wiFi antennas in terminal.

Background

WiFi wireless network surfing can be simply understood as wireless surfing, and almost all smart phones, tablet computers and notebook computers support WiFi surfing, which is the most widely used wireless network transmission technology at present. But the transmission speed is very high and can reach 54Mbps, thereby meeting the requirements of personal and social informatization.

An antenna pair: in the design of a terminal antenna, a condition that two or more antennas share a radiator or a branch is communicated may be referred to as an antenna pair, and generally, it is common that the core idea of designing an antenna pair composed of two antennas is to arrange antennas through a shared radiator or a short distance, thereby reducing the overall volume of the whole antenna system. The more antennas are contained in the antenna pair, the more the volume can be reduced, but the problem that S parameters are difficult to adjust due to mutual influence of multiple antennas is solved correspondingly.

At present, more and more terminals supporting WiFi wireless internet access are available in the market, and terminal manufacturers also provide full-scene terminal wireless equipment and terminal scenes at a glance, intelligent interconnection from a mobile phone to an automobile, and working places and shopping malls covered by full-scene WiFi from smart homes covered by full-scene WiFi to full-scene WiFi, and the like, so that people do not leave WiFi wireless internet access in all aspects of life, and higher requirements on the quality, transmission rate and connection efficiency of WiFi internet access are provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a two wiFi antennas on same ground, solve present single wiFi antenna inefficiency, antenna radiation directionality is poor, the problem of unable satisfied demand.

In order to solve the above problems, the present invention provides a common ground dual WiFi antenna, which includes a first WiFi antenna, a second WiFi antenna, and a ground strip;

the first WiFi antenna comprises a first radiation branch, a first spiral spring structure, a first feeding point, a first grounding point and a first cable line; the first radiation branch is vertically connected with the first spiral spring; the first spiral spring is electrically connected with the first feed point; the first cable wire is electrically connected with the first feed point; the first cable wire is electrically connected with the grounding strap through the first grounding point;

the second WiFi antenna comprises a second radiation branch, a second spiral spring structure, a second feeding point, a second grounding point and a second cable line; the second radiation branch is vertically connected with the second spiral spring; the second spiral spring is electrically connected with the second feed point; the second cable line is electrically connected with the second feed point; the second cable wire is electrically connected with the grounding strap through the second grounding point.

Optionally, in the common-ground dual WiFi antenna, the first WiFi antenna and the second WiFi antenna are arranged in mirror symmetry.

Optionally, in the common-ground dual WiFi antenna, a distance between the first WiFi antenna and the second WiFi antenna is 45 ± 0.5mm.

Optionally, in the common-ground dual WiFi antenna, the total length of the ground strip is 125 ± 0.1mm, and the width of the ground strip is 10 ± 1mm.

Optionally, in the common-ground dual WiFi antenna, the first radiating branch and the second radiating branch have the same length.

Optionally, in the common-ground dual WiFi antenna, the lengths of the first radiating branch and the second radiating branch are 5 ± 0.1mm.

Optionally, in the common-ground dual WiFi antenna, the first coil spring and the second coil spring have the same length.

Optionally, in the common-ground dual WiFi antenna, the length of the first coil spring and the length of the second coil spring are 85 ± 0.1mm.

Optionally, in the common-ground dual WiFi antenna, the number of turns of the first coil spring and the second coil spring is 4.

Optionally, in the common-ground dual WiFi antenna, a total length of the first radiating branch and the first coil spring is equal to a length of the first cable line; the total length of the second radiating branch and the second spiral spring is equal to the length of the second cable line.

The beneficial effects of the utility model are that:

the utility model adopts the scheme of sharing the grounding strip to realize the size miniaturization design of the double antennas, the mirror image is provided with two WiFi single antennas, and the effect of sharing the ground is realized through the grounding strip, so that no extra space is occupied; the single WiFi antenna is provided with the radiation branches extending in the opposite direction, so that different radiation directions of each WiFi antenna can be realized, complementation is formed, and the radiation range of the antenna is enlarged; therefore, double WiFi antennas can be achieved, a good radiation effect is achieved on the premise that a small space is occupied, and due to the fact that the structure and the size of each single WiFi antenna are completely the same, design cost and manufacturing cost can be saved in the production and manufacturing process.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a structural diagram of a common-ground dual WiFi antenna provided in this embodiment;

fig. 2 is a simulation diagram of the efficiency of the first WiFi antenna of the common ground dual WiFi antenna provided in this embodiment;

fig. 3 is a simulation diagram of the efficiency of the second WiFi antenna of the common ground dual WiFi antenna provided in this embodiment;

fig. 4 is an S parameter modulation diagram of a first WiFi antenna of a common ground dual WiFi antenna provided in this embodiment;

fig. 5 is an S parameter adjustment diagram of a second WiFi antenna of a common ground dual WiFi antenna provided in this embodiment;

fig. 6 is an S parameter simulation diagram of a first WiFi antenna of a common ground dual WiFi antenna provided in this embodiment;

fig. 7 is an S parameter simulation diagram of a second WiFi antenna of a common-ground dual WiFi antenna provided in this embodiment;

fig. 8 is a simulation diagram of the radiation direction of the common-ground dual WiFi antenna provided in this embodiment at the 2.4GHz band;

fig. 9 is a simulation diagram of the radiation direction of the common-ground dual WiFi antenna provided in this embodiment at the 5.8GHz frequency band;

fig. 10 is a simulation diagram of isolation of a common-ground dual WiFi antenna provided in this embodiment;

wherein the reference numerals are as follows:

1-a first WiFi antenna; 2-a second WiFi antenna; 3-a grounding strap; 11-a first radiating branch; 12-a first helical spring structure; 13-a first feeding point; 14-a first ground point; 15-a first cable line; 21-a second radiating branch; 22-a second helical spring structure; 23-a second feeding point; 24-a second ground point; 25-second cable line.

Detailed Description

The following describes the common-ground dual WiFi antenna and the terminal in detail with reference to the accompanying drawings and specific embodiments. It should be noted that "first", "second", and the like in the description and claims of the present invention and the accompanying drawings are used for distinguishing similar objects so as to describe embodiments of the present invention, and are not intended to describe a specific order or sequence, and it should be understood that structures so used may be interchanged where appropriate. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The utility model provides a double WiFi antenna adopting a common grounding strip, two WiFi single antennas are arranged in a mirror image mode, and the common grounding effect is realized through the grounding strip, so that no extra space is occupied; the single WiFi antenna is provided with the radiation branches extending in the opposite direction, so that different radiation directions of each WiFi antenna can be realized, and complementation is formed, and the radiation range of the antenna is enlarged; therefore, the double WiFi antennas can be realized, and a better radiation effect is realized on the premise of occupying a smaller space.

Fig. 1 is a structural diagram of a common-ground dual WiFi antenna provided in this embodiment, and the present invention provides a common-ground dual WiFi antenna, which includes a first WiFi antenna 1, a second WiFi antenna 2 and a grounding strap 3;

the first WiFi antenna comprises a first radiation branch 11, a first spiral spring structure 12, a first feeding point 13, a first grounding point 14 and a first cable line 15; the first radiating branch 11 is vertically connected with the first spiral spring 12; the first coil spring 12 is electrically connected to the first feeding point 13; the first cable line 15 is electrically connected with the first feeding point 13; the first cable wire 15 is electrically connected with the grounding strap 3 through the first grounding point 14;

the second WiFi antenna includes a second radiating branch 21, a second helical spring structure 22, a second feeding point 23, a second grounding point 24, and a second cable line 25; the second radiating branch 21 is vertically connected with the second helical spring 22; the second coil spring 22 is electrically connected to the second feeding point 23; the second cable line 25 is electrically connected to the second feeding point 23; the second cable line 25 is electrically connected to the grounding strap 3 through the second grounding point 24.

Importantly, the first WiFi antenna 1 is fed through the first feeding point 13, the first WiFi antenna 2 is fed through the second feeding point 23, and the first WiFi antenna 1 and the first WiFi antenna 2 are fed through different feeding points, so that the dual WiFi antennas can achieve good isolation at the feeding end.

Further, the first WiFi antenna 1 is electrically connected to the grounding strap 3 through the first grounding point 14, and the second WiFi antenna 2 is electrically connected to the grounding strap 3 through the second grounding point 24, so that the first WiFi antenna 1 and the second WiFi antenna 2 are grounded in common, and both the first WiFi antenna 1 and the second WiFi antenna 2 can achieve a larger grounding area, thereby achieving better radiation characteristics.

Preferably, the distance between the first WiFi antenna 1 and the second WiFi antenna 2 is 45 ± 0.5mm, and the distance between the first WiFi antenna 1 and the second WiFi antenna 2 is between a quarter wavelength and a half wave of a 2.4G frequency, so that the isolation problem can be effectively reduced.

More preferably, the total length of the grounding strap 3 is 125 ± 0.1mm, and the width is 10 ± 1mm, wherein the length is calculated as the wavelength of the 2.4G frequency, so as to realize better grounding of the WiFi antenna.

More preferably, the first coil spring and the second coil spring have the same length, and the length of the first coil spring and the length of the second coil spring are 85 ± 0.1mm.

More preferably, the number of turns of the first and

second coil springs

12 and 22 is 4, and when the number of turns of the coil is 4, good radiation characteristics can be achieved.

More preferably, the total length of the first radiating branch 11 and the first coil spring 12 is equal to the length of the first cable wire 15; the total length of the second radiating branch 21 and the second coil spring 22 is equal to the length of the second cable line 25, and is about three-quarter wavelength of 2.4G frequency, so as to form a dipole, which can effectively increase the radiation efficiency.

Fig. 2 is a simulation diagram of the efficiency of a first WiFi antenna of a common-ground dual WiFi antenna provided in this embodiment, and fig. 3 is a simulation diagram of the efficiency of a second WiFi antenna of a common-ground dual WiFi antenna provided in this embodiment, and it can be seen from fig. 2 and fig. 3 that the first WiFi antenna 1 and the second WiFi antenna 2 both achieve better radiation efficiency by forming a dipole.

Fig. 4 is an S parameter debugging diagram of a first WiFi antenna of a common-ground dual WiFi antenna provided in this embodiment, fig. 5 is an S parameter debugging diagram of a second WiFi antenna of a common-ground dual WiFi antenna provided in this embodiment, fig. 6 is an S parameter simulation diagram of a first WiFi antenna of a common-ground dual WiFi antenna provided in this embodiment, fig. 7 is an S parameter simulation diagram of a second WiFi antenna of a common-ground dual WiFi antenna provided in this embodiment, it can be seen by referring to fig. 4 to fig. 7 that the first WiFi antenna 1 and the second WiFi antenna 2 both achieve good radiation characteristics and radiation efficiency at a 2.4GHz frequency point and a 5.8GHz frequency point, and interference between each other is small, and radiation efficiency of a specific WiFi frequency point is not affected.

More preferably, the lengths of the first radiation branch 11 and the second radiation branch 21 are equal, and the lengths of the first radiation branch 11 and the second radiation branch 21 are designed to be 5 ± 0.1mm by using the principle of 5.8G wavelength, so that the whole antenna has dual frequencies of 2.4GWIFI and 5.8GWIFI at the same time; further, since the first WiFi antenna 1 and the second WiFi antenna 2 are arranged in a mirror image manner, and the first radiation branch 11 and the second radiation branch 21 are both arranged perpendicular to the main radiator, different directional characteristics of the first WiFi antenna 1 and the second WiFi antenna 2 can be realized, and complementation is formed.

Fig. 8 is a simulation diagram of the radiation direction of the common-ground dual WiFi antenna at the 2.4GHz band, and it can be seen from the diagram that the main radiation directions of the first WiFi antenna 1 and the second WiFi antenna 2 at the 2.4GHz band are opposite, so that a good complementary effect can be achieved, the omnidirectional characteristic of the dual WiFi antennas can be achieved, and the actual requirements can be better met.

Fig. 9 is a simulation diagram of the radiation direction of the common-ground dual WiFi antenna at the 5.8GHz band provided in this embodiment, and it can be seen from the diagram that the main radiation directions of the first WiFi antenna 1 and the second WiFi antenna 2 at the 5.8GHz band are opposite, so that a good complementary effect can be achieved, the omnidirectional characteristic of the dual WiFi antennas can be achieved, and the actual requirements can be better met.

More importantly, since the layout distance left between the first WiFi antenna 1 and the second WiFi antenna 2 is between the quarter wavelength and the half wave of the 2.4G frequency, the isolation problem can be effectively reduced, and the feeding points of the first WiFi antenna 1 and the second WiFi antenna 2 which are commonly grounded are different and respectively feed, and the distance between the first feeding point 13 and the second feeding point 23 is also between the quarter wavelength and the half wave of the 2.4G frequency, so that better isolation can be realized at the feeding end.

Fig. 10 is a simulation diagram of isolation of the common-ground dual WiFi antenna provided in this embodiment, and it can be seen from the diagram that isolation of-20 dB or more can be achieved in a frequency band of about 2.4GHz for the first WiFi antenna 1 and the second WiFi antenna 2, and isolation of-19 dB or more can be achieved in a frequency band of about 5.8GHz for the first WiFi antenna 1 and the second WiFi antenna 2, so that the entire dual WiFi antenna achieves very good isolation and meets the requirements.

In summary, the present embodiment provides a common-ground dual WiFi antenna, which includes a first WiFi antenna, a second WiFi antenna, and a ground strip; the first WiFi antenna comprises a first radiation branch, a first spiral spring structure, a first feeding point, a first grounding point and a first cable line; the first radiation branch is vertically connected with the first spiral spring; the first spiral spring is electrically connected with the first feed point; the first cable wire is electrically connected with the first feed point; the first cable wire is electrically connected with the grounding strap through the first grounding point; the second WiFi antenna comprises a second radiation branch, a second spiral spring structure, a second feeding point, a second grounding point and a second cable line; the second radiation branch is vertically connected with the second spiral spring; the second spiral spring is electrically connected with the second feed point; the second cable line is electrically connected with the second feed point; the second cable wire is electrically connected with the grounding strap through the second grounding point; the scheme of sharing the grounding strip is adopted to realize the size miniaturization design of the double antennas, the two WiFi single antennas are arranged in a mirror image mode, the effect of sharing the ground is realized through the grounding strip, and no extra space is occupied; the single WiFi antenna is provided with the radiation branches extending in the opposite direction, so that different radiation directions of each WiFi antenna can be realized, complementation is formed, and the radiation range of the antenna is enlarged; therefore, the double WiFi antennas can be realized, a better radiation effect is realized on the premise of occupying smaller space, and the design cost and the manufacturing cost can be saved in the production and manufacturing process because the structure and the size of a single WiFi antenna are completely the same.

The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any changes and modifications made by those skilled in the art according to the above disclosure are all within the scope of the appended claims.

Claims

1. A common ground dual WiFi antenna comprises a first WiFi antenna, a second WiFi antenna and a grounding strip;

the first WiFi antenna comprises a first radiation branch, a first spiral spring structure, a first feeding point, a first grounding point and a first cable line; the first radiation branch is vertically connected with the first spiral spring; the first spiral spring is electrically connected with the first feed point; the first cable line is electrically connected with the first feed point; the first cable wire is electrically connected with the grounding strap through the first grounding point;

2. A common ground dual WiFi antenna according to claim 1, characterized in that the first WiFi antenna and the second WiFi antenna are arranged mirror symmetrically.

3. A co-ground dual WiFi antenna as claimed in claim 1, wherein the distance between the first WiFi antenna and the second WiFi antenna is 45 ± 0.5mm.

4. A co-ground dual WiFi antenna as claimed in claim 1, wherein the grounding strap has a total length of 125 ± 0.1mm and a width of 10 ± 1mm.

5. A co-ground dual WiFi antenna as claimed in claim 1, wherein the first radiating branch and the second radiating branch are equal in length.

6. A co-ground dual WiFi antenna according to claim 1, wherein the first radiating branch and the second radiating branch are 5 ± 0.1mm long.

7. A common ground dual WiFi antenna as claimed in claim 1, wherein the first and second coil springs are equal in length.

8. A common ground dual WiFi antenna according to claim 1, characterized in that the length of the first and second coil springs is 85 ± 0.1mm.

9. A common ground dual WiFi antenna as claimed in claim 1 wherein the number of turns of the first and second coil springs is 4.

10. A common ground dual WiFi antenna according to claim 1, characterized in that the total length of the first radiating branch and the first coil spring is equal to the length of the first cable line; the total length of the second radiating branch and the second spiral spring is equal to the length of the second cable wire.