CN218005244U - Filtering antenna and electronic equipment - Google Patents
Filtering antenna and electronic equipment Download PDFInfo
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- CN218005244U CN218005244U CN202222236777.0U CN202222236777U CN218005244U CN 218005244 U CN218005244 U CN 218005244U CN 202222236777 U CN202222236777 U CN 202222236777U CN 218005244 U CN218005244 U CN 218005244U
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Abstract
The application belongs to the technical field of antennas and provides a filtering antenna and an electronic device, wherein the filtering antenna comprises a first main radiation structure, a second main radiation structure, a feed structure and a feed point; the first main radiation structure is provided with a first slot, the feed structure is in a gradually-changed trapezoid shape, the top of the feed structure is arranged in the first slot and provided with a gap between the top of the feed structure and the side wall of the first slot, the bottom of the feed structure is connected with the second main radiation structure, and the feed point is respectively connected with the feed structure and the first main radiation structure. According to the antenna, the grooves are formed in the first main radiation structure and the second main radiation structure, and the gradually-changed trapezoid feed structure is arranged between the first main radiation structure and the second main radiation structure, so that a current path is effectively prolonged, the matching characteristic of the antenna is optimized, and the broadband, the high efficiency and the miniaturization of the antenna are realized.
Description
Technical Field
The application belongs to the technical field of antennas, and particularly relates to a filtering antenna and an electronic device.
Background
The mobile communication antenna is a metal device capable of emitting and receiving electromagnetic waves, and is mainly applied to communication of various wireless devices. The addition of the antenna to the wireless device can effectively improve the capability of the wireless device for transmitting and receiving signals.
Since the operating frequency band of the mobile antenna is wide, in order to ensure a small size and excellent performance, the mobile communication antenna is generally composed of two antennas, one antenna operates at 699-960MHz &1710-2690MHz (LTE antenna), and the other antenna operates at 3300-4200MHz &4400-5000MHz. Therefore, it is necessary to design an antenna which works in the frequency band of 3300-4200MHz and 4400-5000MHz and has better performance; under the condition that the structure is limited, the problem of interference between the mobile communication antenna and the wifi antenna is difficult to solve, and a filter is added to a radio frequency link in a commonly adopted solution, so that the cost is increased, and the radio frequency performance of the whole machine is deteriorated due to insertion loss introduced by the filter. Therefore, it is of great practical value to design a mobile communication antenna having a filter characteristic and good performance.
SUMMERY OF THE UTILITY MODEL
The utility model provides a filtering antenna and electronic equipment aims at providing one kind and has filtering characteristic and mobile communication antenna that the performance is good.
In order to solve the technical problem, the utility model provides a filtering antenna, include:
the first main radiation structure is provided with a first open slot;
the second main radiation structure is internally provided with a U-shaped groove;
the feed structure is in a gradually-changed trapezoid shape, the top of the feed structure is arranged in the first slot, a gap is formed between the top of the feed structure and the side wall of the first slot, the bottom of the feed structure is connected with the second main radiation structure, and the width of the bottom of the feed structure is larger than that of the top of the feed structure;
a feed point connected to the first main radiating structure and the feed structure, respectively.
In one embodiment, the first main radiating structure is further provided with a plurality of second slots, and the plurality of second slots are respectively arranged on two sides of the first slot.
In one embodiment, a plurality of third slots are respectively arranged on two sides of the second main radiating structure.
In one embodiment, the plurality of third slots on both sides of the second main radiating structure are symmetrical to each other.
In one embodiment, the opening direction of the U shape of the U-shaped slot is the same as the opening direction of the first slot.
In one embodiment, the length of the U-shaped slot is equal to half the wavelength at a frequency of 2.45 GHz.
In one embodiment, a width of a bottom of the feed structure is less than or equal to a width of the second main radiating structure.
In one embodiment, the length of the top of the feed structure is greater than the depth of the first slot.
In one embodiment, the top of the feed structure is the same width as the gap between the left and right walls of the first slot.
The second aspect of the present application also provides an electronic device comprising a filtering antenna as described in any one of the above.
The utility model has the advantages that: through fluting on first main radiation structure, second main radiation structure to adopt the trapezoidal feed structure of gradual change to set up between first main radiation structure, second main radiation structure, prolonged the current path effectively, optimized the matching characteristic of antenna, and through opening the U-shaped line of a slot on second main radiation structure, can effectively filter and 2.4G interference between the WIFI signal, realized broadband, high efficiency and the miniaturization of antenna.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a filtering antenna according to an embodiment of the present application;
fig. 2 is another schematic structural diagram of a filtering antenna according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a filtering antenna according to an embodiment of the present application;
fig. 4 is a reflection coefficient curve of a filtering antenna according to an embodiment of the present disclosure;
fig. 5 is a radiation efficiency curve of a filtering antenna according to an embodiment of the present application;
fig. 6 is a current distribution diagram of a filtering antenna according to an embodiment of the present application.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution in the embodiments of the present invention will be clearly described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
The terms "comprises" and "comprising," and any variations thereof in the description and claims of the invention and the above-described drawings, are intended to cover non-exclusive inclusions. For example, a process, method, or system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order.
An embodiment of the present application provides a filtering antenna, as shown in fig. 1, the filtering antenna includes: a first main radiating structure 10, a second main radiating structure 20, a feed structure 30, a feed point 40.
Specifically, the first main radiation structure 10 is provided with a first slot 11, the second main radiation structure 20 is provided with a U-shaped slot 23, the feed structure 30 is in a tapered trapezoid shape, the top of the feed structure 30 is disposed in the first slot 11 and a gap is formed between the top of the feed structure 30 and the sidewall of the first slot 11, the bottom of the feed structure 30 is connected to the second main radiation structure 20, the width of the bottom of the feed structure 30 is greater than the width of the top of the feed structure 30, and the feed point 40 is connected to the first main radiation structure 10 and the feed structure 30 respectively.
In this embodiment, the filter antenna is disposed on the dielectric substrate 600, the feeding point 40 is disposed in a gap between the top of the feeding structure 30 and the sidewall of the first slot 11, the feeding structure 30 is in a tapered trapezoid shape, specifically, the bottom width of the feeding structure 30 is greater than the top width, the top of the feeding structure 30 is disposed in the first slot 11, the bottom of the feeding structure 30 is connected to the second main radiating structure 20, and a U-shaped slot 23 is formed by opening a slot on the second main radiating structure 20, so that a current path is effectively extended, a miniaturization and a filtering characteristic of the antenna are realized, and the filter antenna still has good performance in a frequency band of 3300-4200MHz &4400-5000MHz.
In one embodiment, the first main radiating structure 10 is disposed opposite to the second main radiating structure 20, the feeding structure 30 is disposed between the first main radiating structure 10 and the second main radiating structure 20, in particular, a gap is disposed between the feeding structure 30 and the first main radiating structure 10, and the feeding structure 30 is connected to the second main radiating structure 20, in particular, the feeding structure is integrally formed with the second main radiating structure 20.
In one embodiment, as shown in fig. 1, steps, such as step 12c and step 12d in fig. 1, are provided at two sides of the first slot 11 of the first main radiating structure 10, so that the first main radiating structure 10 is in a stepped groove structure, the first slot 11 is located at the bottommost portion of the groove in the stepped groove structure, and the width of the groove of the stepped groove structure gradually increases from the bottom to the top.
In one embodiment, as shown in connection with fig. 1, the width of the first main radiating structure 10 is equal to the width of the second main radiating structure 20.
In one embodiment, feed structure 30 is a tapered ladder structure.
In one embodiment, the width of the tapered trapezoidal feed structure 30 gradually increases from the top to the bottom thereof.
In a specific embodiment, the feeding structure 30 may be composed of a plurality of feeding metal sheets, the widths of the plurality of feeding metal sheets are sequentially increased, and the plurality of feeding metal sheets are integrally formed.
In one embodiment, as shown in fig. 1, the feeding structure 30 may be a tower structure, the top of which is the top of the tower structure, the bottom of which is the bottom of the tower structure, the two sides of the tower structure are provided with a step structure, and the top of the tower structure is disposed in the first slot 11.
In a specific application embodiment, the number of the stepped structures on two sides of the tower-shaped structure can be set according to requirements, and the stepped structures on two sides of the tower-shaped structure are symmetrically arranged.
In one embodiment, as shown in connection with fig. 1, the U-shaped slot 23 in the second main radiating structure 20 may be composed of a C-shaped slot and two horizontal slots, which are respectively communicated with two openings of the C-shaped slot.
In a specific application embodiment, two horizontal slots of the U-shaped slots 23 can be in staggered communication with the two openings of the C-shaped slots, respectively, or the width of two horizontal slots of the U-shaped slots 23 can be larger or smaller than the width of the two openings of the C-shaped slots.
In one embodiment, referring to fig. 2, the first main radiating structure 10 is further provided with a plurality of second slots, and the plurality of second slots are respectively disposed at two sides of the first slot 11.
Referring to fig. 2, one side of the first slot 11 is provided with a second slot 12a, and the other side of the first slot 11 is provided with a second slot 12b.
In one embodiment, the depth of the second slot 12a and the second slot 12b on both sides of the first slot 11 is less than the depth of the first slot 11.
In one embodiment, the width and depth of the second slots on both sides of the first slot 11 are the same, and the second slots on both sides of the first slot 11 are symmetrically disposed, for example, the second slot 12a and the second slot 12b are symmetrically disposed.
In one embodiment, the edge of the second main radiating structure 20 is provided with a plurality of third slots, the first side of the second main radiating structure 20 is connected to the feeding structure 30, and the plurality of third slots may be provided on a fourth side opposite to the first side of the second main radiating structure 20, and may also be provided on a second side and a third side of the second main radiating structure 20, where the second side is opposite to the third side.
In one embodiment, as shown in fig. 1 and fig. 2, a plurality of third slots are respectively disposed on two sides of the second main radiating structure 20, and a plurality of third slots are respectively disposed on the second side and the third side of the second main radiating structure 20.
In the present embodiment, the second side of the second main radiating structure 20 is opposite to the third side, the second side is provided with a plurality of third slots 22a, and the third side is provided with a plurality of third slots 22b.
In a specific application embodiment, the number of the third slots 22a on the second side of the second main radiating structure 20 is equal to that of the third slots 22b on the third side thereof, and the third slots 22a may also be symmetrically arranged with respect to the third slots 22b.
In one embodiment, as shown in fig. 3, the fourth side of the second main radiating structure 20 is provided with a third slot 22c, and the number of the third slots 22c can be set as required.
In a specific application embodiment, the opening direction of the third slot 22c is the same as the opening direction of the U-shaped slot 23, and the depth of the third slot 22c is smaller than the distance between the opening of the U-shaped slot 23 and the fourth side of the second main radiating structure 20.
In this embodiment, the plurality of third slots are formed in the edge of the second main radiating structure 20, so that the second main radiating structure 20 can obtain a curved boundary, the current path is effectively extended, and the antenna is favorably miniaturized.
In one embodiment, the third opening may be a rectangular opening.
In one embodiment, a portion of the second main radiating structure 20 close to the feeding structure 30 is further provided with a step structure 21a and a step structure 21b, the step structure 21a and the step structure 21b are respectively provided on the second side and the third side of the second main radiating structure 20, and the step structure 21a and the step structure 21b are gradually downward along the second main radiating structure 20 towards the feeding structure 30, so that the width of the second main radiating structure 20 along the second main radiating structure 20 towards the feeding structure 30 is gradually reduced until the width is equal to the width of the bottom of the feeding structure 30.
In one embodiment, as shown in fig. 1, the U-shaped slot 23 has a U-shaped opening direction identical to the opening direction of the first slot 11.
In the present embodiment, the U-shaped slot 23 is disposed parallel to the dielectric substrate 600, and the opening direction of the U-shaped slot 23 is opposite to the top position of the feeding structure 30 and is the same as the opening direction of the first slot 11 in the first main radiating structure 10.
In one embodiment, the length of the U-shaped slot 23 is equal to one-half of the wavelength at a frequency of 2.45 GHz.
In this embodiment, the U-shaped slot 23 is formed by opening the U-shaped slot on the second main radiating structure 20, so that a radiation zero point is introduced, the filtering antenna in this embodiment realizes the filtering characteristic, and the WIFI signal of the 2.4-2.5GHz band can be effectively filtered.
In one embodiment, referring to fig. 1, the width of the bottom of the feeding structure 30 is less than or equal to the width of the second main radiating structure 20.
In the present embodiment, the width of the feeding structure 30 gradually increases from the top thereof to the direction of the connection between the second main radiating structure 20 and the bottom of the feeding structure 30, and is equal to the width of the second main radiating structure 20, so that the antenna matching performance can be effectively improved by the gradual change structure, and a better in-band matching characteristic can be obtained.
In one embodiment, as shown in fig. 3, the length of the top of the feed structure 30 is greater than the depth of the first slot 11.
In one embodiment, as shown in fig. 3, the top of the feeding structure 30 is the same as the width of the gap between the left and right walls of the first slot 11.
In one embodiment, the filter antenna is disposed on the dielectric substrate 600, and the dielectric constant of the dielectric substrate 600 is 4.4.
For the existing 5G product, the isolation characteristic between the mobile antenna and the WIFI antenna is improved by adopting a filter, so that the cost is high, and the antenna radiation performance is also lost. In this embodiment, the filtering antenna has a single-layer PCB structure, and has the characteristics of simple structure, easy processing, mass production, and low cost.
In one embodiment, the first main radiation structure 10 and the second main radiation structure 20 are provided with the slots, and the feeding structure 30 with the gradually changed trapezoid shape is arranged between the first main radiation structure 10 and the second main radiation structure 20, so that the current path is effectively prolonged, the matching characteristic of the antenna is optimized, the width of the filter antenna can be 20mm, the length of the filter antenna can be 40mm, and the thickness of the filter antenna can be 0.8 mm.
In this embodiment, as shown by the Antenna reflection coefficient curve (see curve parameter Plot 1) and the radiation efficiency curve (see curve Antenna parameter Plot 1) shown in fig. 4 and fig. 5, the reflection coefficient of the filter Antenna in this embodiment is less than-10 dB in the 2710-5140MHz frequency band, which has a better matching effect, and the radiation efficiency is higher when the filter Antenna operates in the 3300-4200MHz frequency band and the 4400-5000MHz frequency band; and the reflection coefficient of the filter antenna is only-1 dB at the frequency band of 2.45GHz, the simulation radiation efficiency is only about 5.7%, and interference signals near 2.45GHz can be effectively filtered.
In specific application, the matching characteristics of the filter antenna in each frequency band can be adjusted by adjusting the resonance lengths of the first main radiation structure 10 and the second main radiation structure 20 and the sizes of the matching branches, so that the filter antenna has the advantage of convenience in matching optimization.
In this embodiment, as shown in the antenna current distribution diagram shown in fig. 6, a triangle in fig. 6 is a current schematic, although a reverse current occurs in the radiation structure of the filter antenna in this embodiment at a high frequency, since the antenna parameters of the 5G antenna that are mainly concerned are the reflection coefficient and the radiation efficiency, the directional pattern characteristic of the filter antenna may meet the design requirement.
The embodiment of the application further provides electronic equipment, and the electronic equipment comprises the filtering antenna in any one of the embodiments.
In this embodiment, the electronic device may be a mobile terminal or an electronic device that may be used to receive radio frequency signals.
The embodiment of the application provides a filtering antenna and electronic equipment, and through slotting on a first main radiation structure and a second main radiation structure and adopting a gradually-changed trapezoidal feed structure to be arranged between the first main radiation structure and the second main radiation structure, a current path is effectively prolonged, the matching characteristic of the antenna is optimized, and the broadband, the high efficiency and the miniaturization of the antenna are realized.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and they should be construed as being included in the present application.
Claims (10)
1. A filtering antenna, comprising:
the first main radiation structure is provided with a first notch;
a U-shaped slot is arranged in the second main radiation structure;
the feed structure is in a gradually-changed trapezoid shape, the top of the feed structure is arranged in the first slot, a gap is formed between the top of the feed structure and the side wall of the first slot, the bottom of the feed structure is connected with the second main radiation structure, and the width of the bottom of the feed structure is larger than that of the top of the feed structure;
a feed point connected to the first main radiating structure and the feed structure, respectively.
2. The filtering antenna of claim 1, wherein the first main radiating structure is further provided with a plurality of second slots, and the plurality of second slots are respectively disposed at two sides of the first slot.
3. Filter antenna according to claim 1, wherein the second main radiating structure is provided with a plurality of third slots on each side.
4. Filter antenna according to claim 3, wherein said third slots on both sides of said second main radiating structure are symmetrical to each other.
5. The filtering antenna of claim 1, wherein the U-shaped opening direction of the U-shaped slot is the same as the opening direction of the first slot.
6. Filter antenna according to claim 1, characterised in that the length of the U-shaped slot is equal to half the wavelength at a frequency of 2.45 GHz.
7. Filter antenna according to claim 1, characterised in that the width of the bottom of the feed structure is smaller than or equal to the width of the second main radiating structure.
8. The filtering antenna of claim 1, wherein a length of a top of the feed structure is greater than a depth of the first slot.
9. The filtering antenna of claim 1, wherein the top of the feed structure is the same width as the gap between the left and right walls of the first slot.
10. An electronic device, characterized in that it comprises a filtering antenna according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222236777.0U CN218005244U (en) | 2022-08-23 | 2022-08-23 | Filtering antenna and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222236777.0U CN218005244U (en) | 2022-08-23 | 2022-08-23 | Filtering antenna and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218005244U true CN218005244U (en) | 2022-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222236777.0U Active CN218005244U (en) | 2022-08-23 | 2022-08-23 | Filtering antenna and electronic equipment |
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|---|---|
| CN (1) | CN218005244U (en) |
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2022
- 2022-08-23 CN CN202222236777.0U patent/CN218005244U/en active Active
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