CN215342965U

CN215342965U - UWB antenna of Internet of things

Info

Publication number: CN215342965U
Application number: CN202120497360.2U
Authority: CN
Inventors: 夏兴喜
Original assignee: Shenzhen Feimin Technology Co ltd
Current assignee: Shenzhen Feimin Technology Co ltd
Priority date: 2021-03-09
Filing date: 2021-03-09
Publication date: 2021-12-28
Anticipated expiration: 2031-03-09

Abstract

The utility model provides an Internet of things UWB antenna, which comprises at least two radiating units, a spiral line, a ground plate and a coaxial line, wherein the two adjacent radiating units are connected in series through the spiral line, the coaxial line comprises an inner conductor and an outer conductor, the inner conductor of the coaxial line is connected with the radiating units which are connected in series, and the outer conductor of the coaxial line is connected with the ground plate. The utility model has the beneficial effects that: 1. by using the UWB antenna of the internet of things, the antenna can realize the maximum gain of 8dBi within the frequency band of 2GHz-7GHz, and the maximum efficiency is 80 percent; 2. the UWB antenna of the Internet of things has good UWB ultra wide band characteristic; 3. the UWB antenna of the internet of things can enable the overall radiation direction to be more uniform, thereby meeting the use requirements under various complex conditions.

Description

UWB antenna of Internet of things

Technical Field

The utility model relates to the technical field of wireless carrier communication, in particular to an Internet of things UWB antenna.

Background

Modern UWB technology begins with pulse communication technology that has emerged in the 60 th century, and uses ultra-wide baseband pulses with extremely wide frequency spectrum for communication, so it is also called baseband communication technology, wireless carrier communication technology, etc. Since the advent of UWB and before the 90's of the 20 th century, this technology was used primarily in radar systems for military purposes. UWB is applied to RTLS (real-time location system) during last decade, realizes 0.1 meter-level high-precision location, widely applies in scenes such as factory, warehouse, logistics and the like, and realizes production efficiency improvement and management level improvement.

SUMMERY OF THE UTILITY MODEL

The utility model provides an Internet of things UWB antenna, which comprises at least two radiating units, a spiral line, a ground plate and a coaxial line, wherein the two adjacent radiating units are connected in series through the spiral line, the coaxial line comprises an inner conductor and an outer conductor, the inner conductor of the coaxial line is connected with the radiating units which are connected in series, and the outer conductor of the coaxial line is connected with the ground plate.

As a further improvement of the present invention, the radiation unit includes a first metal elastic sheet and a second metal elastic sheet, and the first metal elastic sheet and the second metal elastic sheet are orthogonally connected.

As a further development of the utility model, the spiral is a one-half wavelength metal spiral.

As a further improvement of the utility model, the spiral line is a piano steel gilding spiral line.

As a further improvement of the present invention, the ground plate is a metal ground plate.

As a further improvement of the present invention, the first metal elastic piece and the second metal elastic piece are made of copper material.

As a further improvement of the present invention, the coaxial line is a 50 ohm coaxial feeder line.

As a further improvement of the present invention, the radiation unit includes a first radiation unit, a second radiation unit, a third radiation unit, and a fourth radiation unit, and the first radiation unit, the second radiation unit, the third radiation unit, and the fourth radiation unit are sequentially connected in series; the helix includes first helix, second helix, third helix, first radiating element pass through between the second radiating element first helix is established ties, the second radiating element pass through between the third radiating element the second helix is established ties, pass through between third radiating element, the fourth radiating element the third helix is established ties, the inner conductor of coaxial line with the fourth radiating element links to each other, the outer conductor of coaxial line with the ground plate links to each other.

The utility model has the beneficial effects that: 1. by using the UWB antenna of the internet of things, the antenna can realize the maximum gain of 8dBi within the frequency band of 2GHz-7GHz, and the maximum efficiency is 80 percent; 2. the UWB antenna of the Internet of things has good UWB ultra wide band characteristic; 3. the UWB antenna of the internet of things can enable the overall radiation direction to be more uniform, thereby meeting the use requirements under various complex conditions.

Drawings

FIG. 1 is a diagram of the UWB antenna structure of the Internet of things of the utility model;

FIG. 2 is a side view of an Internet of things UWB antenna of the utility model;

FIG. 3 is a plot of the present utility standing wave ratio VSWR;

FIG. 4 is a H-plane direction 2D gain pattern of the present invention;

FIG. 5 is a 2D gain pattern for the E-plane direction of the present invention;

fig. 6 is a 3D gain pattern of the present invention.

Detailed Description

As shown in fig. 1, the utility model discloses an internet-of-things UWB antenna, which comprises at least two radiating units, a spiral line, a ground plate 8 and a coaxial line 9, wherein two adjacent radiating units are connected in series through the spiral line, the coaxial line 9 comprises an inner conductor and an outer conductor, the inner conductor of the coaxial line 9 is connected with the radiating units which are connected in series, and the outer conductor of the coaxial line 9 is connected with the ground plate 8.

The radiating unit comprises a first metal elastic sheet 10 and a second metal elastic sheet 11, and the first metal elastic sheet 10 and the second metal elastic sheet 11 are connected in an orthogonal mode.

The spiral line is a metal spiral line with one-half wavelength.

The spiral line is a piano steel gold-plated spiral line.

The grounding plate 8 is a metal grounding plate.

The first metal elastic sheet 10 and the second metal elastic sheet 11 are made of copper materials.

The coaxial line 9 is a 50 ohm coaxial feed line.

The radiation unit comprises a first radiation unit 1, a second radiation unit 2, a third radiation unit 3 and a fourth radiation unit 4, wherein the first radiation unit 1, the second radiation unit 2, the third radiation unit 3 and the fourth radiation unit 4 are sequentially connected in series; the helix includes first helix 7, second helix 6, third helix 5, first radiating element 1 pass through between the second radiating element 2 first helix 7 is established ties, second radiating element 2 pass through between the third radiating element 3 the 6 series connection of second helix, pass through between third radiating element 3, the fourth radiating element 4 third helix 5 is established ties, coaxial line 9's inner conductor with fourth radiating element 4 links to each other, coaxial line 9's outer conductor with the ground plate 8 links to each other.

The utility model relates to a design principle of an Internet of things UWB antenna, which comprises the following steps:

the metal grounding plate 8 and the 1/4 wavelength fourth radiation unit 4 (under the frequency of 2GHz-7 GHz) form a coplanar waveguide feeding form to realize the ultra-wideband 2GHz-7GHz (UWB) frequency band coverage, because the gain of one radiation unit antenna is smaller, the high gain is realized, the antenna adopts four-unit series feeding to improve the antenna gain, the fourth radiation unit 4 is connected with the third radiation unit 3, because the antenna wavelength exceeds half wavelength, the direction of the antenna current can be reversed, thereby the forward current of the fourth radiation unit 4 can be counteracted, the gain attenuation is caused, the radiation characteristic is reduced, therefore, a half wavelength spiral line is connected in series between the fourth radiation unit 4 and the third radiation unit 3, the current reversal can be reversed, the forward current can be realized to flow to the third radiation unit 3, similarly, the second radiation unit 2, the first radiation unit 1 is also connected in series with a half wavelength spiral line to realize the forward current, because the four radiating elements are all forward currents in the whole direction, the whole radiating field intensity of the antenna is enhanced, and the high-gain characteristic of the antenna is realized. In order to solve the directivity of the antenna, the four radiating units respectively adopt a mode that two metal sheets are orthogonal, so that the overall radiation direction is more uniform, and the use under various complexities is met.

The UWB antenna of the Internet of things adopts a 50-ohm coaxial coplanar waveguide feed mode, two metal elastic pieces are orthogonally connected between each radiating unit, and the middle of each radiating unit is connected with the four radiating units through a spiral line, so that the UWB band antenna with high gain is realized. The radiation unit and the ground plate are made of metal copper sheets, the spiral line is a piano steel plated gold wire, and the UWB antenna of the Internet of things realizes good impedance characteristics in a frequency band of 2GHz-7 GHz.

TABLE 1

The data measured in the HFSS simulation and the microwave darkroom according to the above embodiments are as follows: FIG. 3 shows that the antenna standing-wave ratio basically meets the requirement that the antenna standing-wave ratio SWR is less than 3 under the frequency band of 2GHz-7GHz, and the obtained result shows that the antenna realizes good UWB ultra-wideband characteristics. Fig. 4 and 5 are 2D radiation patterns of an H plane and an E plane, respectively, and fig. 6 is a 3D radiation pattern of the antenna, which has a better directivity characteristic, and table one shows the antenna gain and efficiency of the microwave darkroom test, and analysis from the data of table one shows that the antenna achieves the maximum gain of 8dBi and the maximum efficiency of 80% performance within a frequency band of 2GHz-7 GHz.

The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and it is not intended that the utility model be limited to these specific details. For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.

Claims

1. An thing networking UWB antenna which characterized in that: including radiating element, helix, ground plate (8), coaxial line (9), radiating element quantity is two at least, and two are adjacent pass through between the radiating element the helix is established ties together, coaxial line (9) include inner conductor, outer conductor, the inner conductor of coaxial line (9) with establish ties after the radiating element links to each other, the outer conductor of coaxial line (9) with ground plate (8) link to each other.

2. The internet of things UWB antenna of claim 1 wherein: the radiating unit comprises a first metal elastic sheet (10) and a second metal elastic sheet (11), and the first metal elastic sheet (10) and the second metal elastic sheet (11) are connected in an orthogonal mode.

3. The internet of things UWB antenna of claim 1 wherein: the spiral line is a metal spiral line with one-half wavelength.

4. The internet of things UWB antenna of claim 1 wherein: the spiral line is a piano steel gold-plated spiral line.

5. The internet of things UWB antenna of claim 1 wherein: the grounding plate (8) is a metal grounding plate.

6. The internet of things UWB antenna of claim 2, wherein: the first metal elastic sheet (10) and the second metal elastic sheet (11) are made of copper materials.

7. The internet of things UWB antenna of claim 1 wherein: the coaxial line (9) is a 50 ohm coaxial feeder line.

8. The internet of things UWB antenna of claim 1 wherein: the radiation unit comprises a first radiation unit (1), a second radiation unit (2), a third radiation unit (3) and a fourth radiation unit (4), wherein the first radiation unit (1), the second radiation unit (2), the third radiation unit (3) and the fourth radiation unit (4) are sequentially connected in series; the helix includes first helix (7), second helix (6), third helix (5), first radiating element (1) pass through between second radiating element (2) first helix (7) are established ties, second radiating element (2) pass through between third radiating element (3) second helix (6) are established ties, pass through between third radiating element (3), the fourth radiating element (4) third helix (5) are established ties, the inner conductor of coaxial line (9) with fourth radiating element (4) link to each other, the outer conductor of coaxial line (9) with ground plate (8) link to each other.