CN111403905B

CN111403905B - 4G omnidirectional antenna

Info

Publication number: CN111403905B
Application number: CN202010086555.8A
Authority: CN
Inventors: 钟琳琳
Original assignee: TP Link Technologies Co Ltd
Current assignee: Dongguan Tp Link Technology Co ltd
Priority date: 2020-02-11
Filing date: 2020-02-11
Publication date: 2022-09-06
Anticipated expiration: 2040-02-11
Also published as: CN111403905A

Abstract

The invention relates to the technical field of antennas, and provides a 4G omnidirectional antenna which comprises a dielectric plate, a floor, a radiation patch and a feeder line, wherein the floor and the radiation patch are oppositely arranged on the dielectric plate, the feeder line is arranged at one end of the radiation patch close to the floor, the feeder line is in a multi-section structure, the feeder line is provided with a first end and a second end opposite to the first end, the width of the feeder line is increased and then reduced along the direction from the first end to the second end, an accommodating groove is formed in the floor, and the inner diameter of the accommodating groove is gradually reduced along the direction from a notch end to a groove bottom end. The distance between the part of the feeder line close to the second end and the wall of the containing groove of the floor is short, and the part of the feeder line is used for adjusting the coupling degree between the radiation patch and the floor, so that the effect of adjusting the bandwidth of the 4G omnidirectional antenna is achieved; the distance between the part of the feed line close to the first end and the groove wall of the accommodating groove of the floor is long, and the part of the feed line is used for adjusting the impedance between the feed line and the radiation patch.

Description

4G omnidirectional antenna

Technical Field

The invention relates to the technical field of antennas, and particularly provides a 4G omnidirectional antenna.

Background

In recent years, mobile internet has been developed rapidly, and particularly after the 4G communication era, the mobile internet network speed is greatly improved and the use charge is also reduced year by year, so that the mobile internet becomes a choice for accessing more terminals. The mobile equipment and the equipment needing to be installed in an open area access the Internet by using a 4G network, and high-speed real-time control can be realized on the basis of solving the wiring difficulty. The antenna for transmitting and receiving signals is an important component of terminal hardware, and the communication quality between the terminal and the mobile network base station is directly influenced by the properties of designing proper resonant frequency, radiation efficiency, directional diagram and the like.

In order to meet the requirements of multi-band operators in China, the 4G antenna is added into the equipment, and the bandwidth covers 800 MHz-960 MHz and 1710-2690 MHz; meanwhile, the size of the antenna is as small as possible, and the occupied volume in the equipment is reduced. The built-in 4G antenna commonly used in the current equipment mainly has the forms of printing, sticking a shell and inserting. Although the printed antenna can be integrated on the PCB to save cost, there are many requirements on the design. Good antenna radiation requires a large enough clearance area, the printed antenna needs to be designed at the edge of the PCB, the layout space of hardware devices is squeezed, and the requirement on miniaturization is high. The printed antenna floor participates in radiation, the ground size influences the resonant frequency, and the 4G antenna resonance regulation is not obvious. The printed antenna radiation pattern is affected by the floor and the antenna pattern is difficult to control. Secondly, the high cost and long cycle are required for the metal part to be sampled when the plug-in antenna is manufactured. The radiation pattern has directional characteristics, and the device is not suitable for being used by 4G equipment with an undefined scene. And the plug-in antenna has a certain section height, so that no tall metal devices are required to be arranged in the clearance of the surrounding space, and the lower-height equipment is inconvenient for selecting the antenna form. Finally, the whole layout of the shell is required to be considered when the shell-mounted antenna is used in equipment, the requirement on miniaturization is higher and higher, and compromise is made on performance and size during design.

Disclosure of Invention

The invention aims to provide a 4G omnidirectional antenna, aiming at solving the problem that the radiation direction of the existing antenna is limited.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a 4G omnidirectional antenna, includes the dielectric-slab and all locates floor, radiation paster and feed line on the dielectric-slab, the floor with the radiation paster is located relatively on the dielectric-slab, the feed line is located the radiation paster is close to the one end on floor, the feed line is the multistage formula structure and has connect in the first end of radiation paster and towards in floor and with the second end that the first end is relative, the width of feed line is followed first end extremely the direction of second end increases earlier and reduces again, the storage tank that is used for holding the feed line is seted up on the floor, the internal diameter of storage tank is degressive along the direction of notch end to tank bottom end step by step.

In one embodiment, the feeder line comprises at least three branch line sections which are sequentially connected end to end along the extending direction, and the width of each branch line section is increased and then decreased along the direction from the first end to the second end.

In one embodiment, the length of each of the line segments is adapted according to the bandwidth.

In one embodiment, the side wall of the accommodating groove is in a step shape and corresponds to each line segment.

In one embodiment, the radiating patch has a front end facing away from the feed line and a rear end opposite the front end, the rear end being circular arc-shaped and/or the front end being circular arc-shaped.

In one embodiment, an end of the floor facing the radiating patch is rounded.

In one embodiment, the radiation patch is provided with a U-shaped groove conformal with the rear end, and the open end of the U-shaped groove faces the front end; or, a plurality of U-shaped grooves conformal with the rear end are formed in the radiation patch, each U-shaped groove is sequentially sleeved from outside to inside, and the opening end of each U-shaped groove faces the front end.

In one embodiment, the U-shaped groove further comprises a first groove section and a second groove section provided at the open end of the U-shaped groove and bent toward the front end.

In one embodiment, the length of the U-shaped slot is proportional to a quarter of the resonant wavelength.

In one embodiment, the length of the medium plate is 65 mm-75 mm; the width of the dielectric plate is 21-38 mm; the thickness of the dielectric plate is 0.1 mm-1.6 mm.

The invention has the beneficial effects that: according to the 4G omnidirectional antenna provided by the invention, the width of the feeder line is increased and then reduced along the direction from the first end to the second end, and the inner diameter of the containing groove on the floor is gradually reduced along the direction from the notch end to the bottom end of the groove, so that the distance between the part of the feeder line close to the second end and the groove wall of the containing groove on the floor is short, and the part of the feeder line is used for adjusting the coupling degree between the radiation patch and the floor, thereby adjusting the bandwidth of the 4G omnidirectional antenna; the distance between the part of the feed line close to the first end and the groove wall of the accommodating groove of the floor is long, and the part of the feed line is used for adjusting the impedance between the feed line and the radiation patch. In summary, the 4G omni-directional antenna of the present application is not limited in radiation directions of different frequency bands.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described 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 to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a 4G omnidirectional antenna provided in an embodiment of the present invention;

fig. 2 is a standing wave curve of a 4G omni-directional antenna according to an embodiment of the present invention;

fig. 3 is an efficiency curve of the 4G omni-directional antenna provided in the embodiment of the present invention at a frequency band of 800MHz to 900 MHz;

fig. 4 is an efficiency curve of the 4G omnidirectional antenna provided by the embodiment of the present invention in a frequency band of 1710MHz to 2690 MHz;

fig. 5 is a 3D radiation pattern of a 4G omni-directional antenna according to an embodiment of the present invention;

fig. 6 is a 2D radiation pattern of a 4G omni-directional antenna according to an embodiment of the present invention

Fig. 7 is another schematic structural diagram of a 4G omni-directional antenna according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a 4G omni-directional antenna according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a 4G omni-directional antenna according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

the radiating patch comprises a dielectric plate 10, a floor 20, a radiating patch 30, a feeder line 40, a first end 40a, a second end 40b, a containing groove 20a, a branching section 41, a first branching section 41a, a second branching section 41b, a third branching section 41c, a fourth branching section 41d, a fifth branching section 41f, a sixth branching section 41g, a front end 30a, a rear end 30b, a fillet 20b, a U-shaped groove 31, a first groove section 311 and a second groove section 312.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1, a 4G omni-directional antenna according to an embodiment of the present invention includes a dielectric plate 10, and a floor 20, a radiation patch 30 and a feeder 40 all disposed on the dielectric plate 10. The floor 20 and the radiation patch 30 are oppositely arranged on the dielectric plate 10, the feeder line 40 is arranged at one end of the radiation patch 30 close to the floor 20, the feeder line 40 is in a multi-section structure and is provided with a first end 40a connected to the radiation patch 30 and a second end 40b facing the floor 20 and opposite to the first end 40a, the width of the feeder line 40 is increased and then decreased along the direction from the first end 40a to the second end 40b, the floor 20 is provided with a containing groove 20a for containing the feeder line 40, and the inner diameter of the containing groove 20a is gradually decreased along the direction from the notch end to the groove bottom end. Here, the slot end of the accommodating groove 20a faces the power feeding line 40.

In the 4G omnidirectional antenna provided by the embodiment of the present invention, the width of the feeder line 40 increases and then decreases along the direction from the first end 40a to the second end 40b, and the inner diameter of the accommodating slot 20a on the floor 20 decreases gradually along the direction from the slot end to the slot bottom end, so that the distance between the portion of the feeder line 40 close to the second end 40b and the slot wall of the accommodating slot 20a of the floor 20 is short, and the section of the feeder line 40 is used for adjusting the coupling degree between the radiation patch 30 and the floor 20, thereby adjusting the bandwidth of the 4G omnidirectional antenna; a portion of the power feeding line 40 close to the first end 40a is distant from a groove wall of the accommodating groove 20a of the floor 20, and the section of the power feeding line 40 is used to adjust impedance between the power feeding line 40 and the radiation patch 30. Fig. 2 is a standing wave curve of a 4G omni-directional antenna according to an embodiment of the present invention; fig. 3 is an efficiency curve of the 4G omni-directional antenna provided in the embodiment of the present invention at a frequency band of 800MHz to 900 MHz; fig. 4 is an efficiency curve of the 4G omnidirectional antenna provided by the embodiment of the present invention in a frequency band of 1710MHz to 2690MHz, and as can be seen from fig. 2 to fig. 4, the 4G omnidirectional antenna of the present application has good performance in a frequency band of 800MHz to 900MHz and in a frequency band of 1710MHz to 2690MHz, on the basis of adopting the structure of the feeder line 40 and the structure of the floor 20, standing waves are less than 2.5, and the average radiation efficiency is more than 54%. Fig. 5 is a 3D radiation pattern of a 4G omnidirectional antenna provided by the embodiment of the present invention, wherein fig. 5(a) is a 3D radiation pattern of the antenna on a 850MHz frequency band, and fig. 5(b) is a 3D radiation pattern of the antenna on a 2000MHz frequency band; fig. 6 is a 2D radiation pattern of the 4G omni-directional antenna according to the embodiment of the present invention, and as can be seen from fig. 5, the radiation directions of the two antennas are substantially the same in the 850MHz frequency band and the 2000MHz frequency band. As can be seen from fig. 6, the radiation direction perpendicular to the dielectric sheet 10 has no missing angle, the omnidirectional characteristic is good, and the average gain is 2dBi or more. In summary, the 4G omni-directional antenna of the present application is not limited in radiation directions of different frequency bands.

Referring to fig. 1, the feeder line 40 includes at least three segment sections 41 connected end to end in sequence in the extending direction, and the width of each segment section 41 increases and then decreases in the direction from the first end 40a to the second end 40 b. Referring to fig. 7, in an embodiment, the feeding line 40 includes three branch segments 41, a first branch segment 41a is near the first end 40a, a third branch segment 41c is near the second end 40b, and a second branch segment 41b is in the middle, wherein the first branch segment 41a is farther from the sidewall of the accommodating slot 20a for adjusting the impedance between the feeding line 40 and the radiation patch 30. The second segment 41b has the widest width, and the second and

third segments

41b and 41c are closer to the side wall of the receiving slot 20a for adjusting the coupling degree between the radiation patch 30 and the floor 20. Referring to fig. 8, in another embodiment, the feeder line 40 includes six segment divisions 41, which are a first segment division 41a, a second segment division 41b, a third segment division 41c, a fourth segment division 41d, a fifth segment division 41f, and a sixth segment division 41g in sequence from the first end 40a to the second end 40 b. The widths of the first, second and

third line segments

41a, 41b and 41c are gradually increased and further away from the side wall of the accommodating slot 20a, so as to adjust the impedance between the feeding line 40 and the radiation patch 30. The width of the fourth line segment 41d is the largest, and the widths of the fourth line segment 41d, the fifth line segment 41f and the sixth line segment 41g decrease gradually in sequence and are closer to the side wall of the accommodating groove 20a, so as to adjust the coupling degree between the radiation patch 30 and the floor 20. Of course, the number of sections of the feeder 40 can be adjusted accordingly, depending on the actual requirements of use.

Referring to fig. 1, fig. 7 and fig. 8, in the present embodiment, the length of each segment 41 is adapted according to the bandwidth. It is understood that the lengths of the segments of the feeder line 40 can be adjusted according to the actual use requirement, i.e. the lengths of the segments 41 can be the same or different.

Referring to fig. 1, in the present embodiment, the side wall of the accommodating groove 20a is stepped and corresponds to each of the branch sections 41. Of course, the side wall of the receiving groove 20a may also have a smooth arc transition.

Referring to fig. 1, in the present embodiment, the radiation patch 30 has a front end 30a facing away from the power feeding line 40 and a rear end 30b opposite to the front end 30a, and the front end 30a is circular arc-shaped. It will be appreciated that the front end 30a is configured in a circular arc shape to overcome the discontinuous nature of the current on the radiating patch 30.

With continued reference to fig. 1, in this embodiment, the rear end 30b is rounded. It will be appreciated that the rounded configuration of the rear end 30b also overcomes the current discontinuity of the radiating patch 30. Preferably, in another embodiment, the front end 30a is configured in a circular arc shape, and the rear end 30b is also configured in a circular arc shape. The continuity of the current on the radiating patch 30 is better.

Referring to fig. 1, in the present embodiment, an end of the floor 20 facing the radiation patch 30 is rounded 20 b. Likewise, the rounded corner 20b configuration also overcomes the current discontinuity characteristic of the radiating patch 30.

Referring to fig. 1, in the present embodiment, a U-shaped groove 31 conformal with the back end 30b is formed on the radiation patch 30, and an open end of the U-shaped groove 31 faces the front end 30a, where the U-shaped groove 31 is used to maintain the current continuity of the antenna without destroying the resonance of the 4G omni-directional antenna. Referring to fig. 8, in another embodiment, the radiation patch 30 is provided with a plurality of U-shaped grooves 31 conformal with the rear end 30b, each U-shaped groove 31 is sequentially sleeved from outside to inside, and an open end of each U-shaped groove 31 faces the front end 30 a. It will be appreciated that the number of U-shaped slots 31 is increased according to the actual requirements.

Referring to fig. 9, in the present embodiment, the U-shaped groove 31 further includes a first groove section 311 and a second groove section 312, which are disposed at the opening end of the U-shaped groove 31 and are bent toward the front end 30 a. It can be understood that when the U-shaped slot 31 of the 4G omni-directional antenna needs to have a lower frequency, there are the first slot section 311 and the second slot section 312 bent to the front end 30a of the radiation patch 30.

In the present embodiment, the length of the U-shaped slot 31 is proportional to a quarter of the resonance wavelength.

Referring to the drawings, in the present embodiment, the length of the dielectric plate 10 is 65mm to 75 mm; the width of the medium plate 10 is 21 mm-38 mm; the thickness of the dielectric plate 10 is 0.1mm to 1.6 mm. It is to be understood that the length of the dielectric sheet 10 may be 65mm, 66mm, 67mm, 68mm, 69mm, 70mm, 71mm, 72mm, 73mm, 74mm, 75mm, etc.; the width of the medium plate 10 may be 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm, 32mm, 33mm, 34mm, 35mm, 36mm, 37mm, 38mm, or the like; the length of the dielectric sheet 10 may be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, or the like. For example, the size of the dielectric sheet 10 is preferably 72mm 29m 0.8 mm.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A4G omnidirectional antenna is characterized in that: the feed line is of a multi-section structure and is provided with a first end connected to the radiation patch and a second end facing the floor and opposite to the first end, the width of the feed line is increased and then decreased along the direction from the first end to the second end, the floor is provided with an accommodating groove for accommodating the feed line, and the inner diameter of the accommodating groove is gradually decreased along the direction from a notch end to a groove bottom end; the radiation patch is provided with a front end deviating from the feeder line and a rear end opposite to the front end, and the rear end is arc-shaped; a U-shaped groove conformal with the rear end is formed in the radiation patch, and the opening end of the U-shaped groove faces the front end; or, a plurality of U-shaped grooves conformal with the rear end are formed in the radiation patch, each U-shaped groove is sequentially sleeved from outside to inside, and the opening end of each U-shaped groove faces the front end.

2. The 4G omni directional antenna according to claim 1, wherein: the feeder line comprises at least three branch line sections which are sequentially connected end to end along the extending direction, and the width of each branch line section is increased and then decreased along the direction from the first end to the second end.

3. The 4G omni directional antenna according to claim 2, wherein: the length of each of the line segments is adapted according to the bandwidth.

4. The 4G omni directional antenna according to claim 2, wherein: the side wall of the containing groove is in a step shape and corresponds to each line segment.

5. The 4G omni directional antenna according to claim 1, wherein: one end of the floor, which faces the radiation patch, is chamfered.

6. The 4G omni directional antenna according to claim 1, wherein: the U-shaped groove is characterized by further comprising a first groove section and a second groove section which are arranged at the opening end of the U-shaped groove and face the front end to be bent oppositely.

7. The 4G omni directional antenna according to claim 1, wherein: the length of the U-shaped slot is proportional to one quarter of the resonant wavelength.

8. The 4G omni directional antenna according to claim 1, wherein: the length of the dielectric plate is 65 mm-75 mm; the width of the medium plate is 21-38 mm; the thickness of the dielectric plate is 0.1 mm-1.6 mm.