Antenna and communication equipment
By adding resonator components on the dielectric layer of the millimeter-wave plane ultra-bandwidth antenna, the in-band interference suppression problem is solved, and the radiation performance of ultra-bandwidth and high isolation is achieved.
Patent Information
- Application Number
- CN202422306145.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-20
AI Technical Summary
Existing millimeter-wave plane ultra-bandwidth antennas lack inband notch characteristics and cannot effectively suppress inband interference.
A resonator assembly spaced from both sides of the feeder is added on the dielectric layer of the antenna, including the first and second resonators, to form a symmetrical structure to achieve the double notch feature.
In-band interference suppression of the antenna is achieved, with ultra-bandwidth characteristics, ensuring high maximum gain and radiation efficiency within the passband, and providing high isolation at the notch center frequency.
Smart Images
Figure CN223066474U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present utility model relate to the technical field of antennas, and particularly to an antenna and a communication device. Background Art
[0002] The millimeter-wave planar ultra-wideband antenna is a high-performance antenna design with an extremely wide bandwidth, capable of maintaining stable radiation performance within a wide frequency range. Due to its planar structure, it can meet the requirements of miniaturization and integration, and is usually applied to miniaturized wireless communication terminals.
[0003] However, in the process of implementing the embodiments of the present utility model, the inventors found that currently, the antenna includes a dielectric layer, a first-surface feeder and a radiator disposed on the dielectric layer, and a radio frequency ground layer disposed on the second surface of the dielectric layer. However, the antenna with the above structure does not have an in-band notch and cannot effectively suppress in-band interference. Summary of the Utility Model
[0004] The main technical problem to be solved by the present utility model is to provide an antenna that has a notch characteristic and can effectively suppress in-band interference by adding resonator components spaced apart from both sides of the feeder.
[0005] To solve the above technical problem, a technical solution adopted by the present utility model is: providing an antenna, including a dielectric layer, a radiation layer and a radio frequency bottom layer. The dielectric layer has a first surface and a second surface, and the first surface and the second surface are oppositely disposed. The radiation layer includes a feeder, a resonator component and a radiator. The feeder and the resonator component are both disposed at one end of the first surface. One end of the feeder is connected to the radiator. The resonator component is spaced apart from both sides of the feeder. The radiator is disposed at the other end of the first surface. The radio frequency ground layer is disposed at one end of the second surface.
[0006] Optionally, the resonator component includes a first resonator and a second resonator. The first resonator is spaced apart from one side of the feeder, and the second resonator is spaced apart from the other side of the feeder. The resonator component and the feeder are both symmetrically disposed with respect to the central axis plane of the dielectric layer.
[0007] Optionally, the first resonator includes a first branch, a second branch, a third branch and a fourth branch. The first branch is parallel to the feeder and is spaced apart from one side of the feeder. The second branch is connected to one end of the first branch. The third branch is connected to the middle of the first branch. The fourth branch is connected to the other end of the first branch. The second branch, the third branch and the fourth branch are all perpendicular to the first branch.
[0008] Optionally, the widths of the first stub, the second stub, the third stub, and the fourth stub are all equal, the distances between the third stub and the second stub and between the third stub and the fourth stub are both equal, and the lengths of the second stub and the fourth stub are equal.
[0009] Optionally, the widths of the first stub, the second stub, the third stub, and the fourth stub are all 0.2 mm, the distances between the third stub and the second stub and between the third stub and the fourth stub are both 1.5 mm, the lengths of the second stub and the fourth stub are both 1.2 mm, and the distance between the first stub and the feeder is 0.15 mm.
[0010] Optionally, the radiator includes a first radiation patch, a second radiation patch, and a third radiation patch. The first radiation patch is connected to one end of the feeder. One side of the first radiation patch is connected to the second radiation patch, and the other side of the first radiation patch is connected to the third radiation patch.
[0011] Optionally, the radiator is symmetrically arranged with respect to the central axis plane of the dielectric layer.
[0012] Optionally, the RF ground layer includes a first RF ground patch, a second RF ground patch, and a third RF ground patch. One side of the first RF ground patch is connected to the second RF ground patch, and the other side of the first RF ground patch is connected to the third RF ground patch. The first RF ground patch, the second RF ground patch, and the third RF ground patch enclose a groove.
[0013] Optionally, the RF ground layer is symmetrically arranged with respect to the central axis plane of the dielectric layer.
[0014] To solve the above technical problems, another technical solution adopted by the present utility model is: to provide a communication device including the above antenna.
[0015] In an embodiment of the present utility model, the antenna includes a dielectric layer, a radiation layer, and an RF bottom layer. The dielectric layer has a first surface and a second surface, and the first surface and the second surface are oppositely arranged. The radiation layer includes a feeder, a resonator assembly, and a radiator. The feeder and the resonator assembly are both arranged at one end of the first surface. One end of the feeder is connected to the radiator. The resonator assembly is spaced apart from both sides of the feeder. The radiator is arranged at the other end of the first surface. The RF ground layer is arranged on the second surface. By adding a resonator assembly spaced apart from both sides of the feeder, the antenna has a notch characteristic and can effectively suppress in-band interference. Description of the Drawings
[0016] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the embodiments of the present application. Obviously, the accompanying drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on the accompanying drawings.
[0017] Figure 1 is a schematic structural diagram of an antenna provided by an embodiment of the present utility model;
[0018] Figure 2 is an exploded schematic structural diagram of an antenna provided by an embodiment of the present utility model;
[0019] Figure 3 is a schematic top view of an antenna provided by an embodiment of the present utility model;
[0020] Figure 4 is a schematic bottom view of an antenna provided by an embodiment of the present utility model;
[0021] Figure 5 is a simulation diagram of the standing wave ratio of an antenna provided by an embodiment of the present utility model;
[0022] Figure 6 is a simulation diagram of the maximum gain and radiation efficiency of an antenna provided by an embodiment of the present utility model;
[0023] Figure 7 is the radiation pattern of an antenna provided by an embodiment of the present utility model at 11.0 GHz;
[0024] Figure 8 is the radiation pattern of an antenna provided by an embodiment of the present utility model at 28.0 GHz.
[0025] Description of reference numerals:
[0026] 100, antenna;
[0027] 1, dielectric layer;
[0028] 2, radiation layer; 21, feeder; 22, resonator assembly; 221, first resonator; 2211, first branch; 2212, second branch; 2213, third branch; 2214, fourth branch; 222, second resonator; 2221, fifth branch; 2222, sixth branch; 2223, seventh branch; 2224, eighth branch; 23, radiator; 231, first radiation sheet; 232, second radiation sheet; 233, third radiation sheet;
[0029] 3, RF ground plane; 31, first RF ground sheet; 32, second RF ground sheet; 33, third RF ground sheet; 34, groove. Detailed implementation manners
[0030] For the convenience of understanding the present utility model, the present utility model will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as "locked to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are only for the purpose of illustration.
[0031] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in this specification in the description of the present utility model are only for the purpose of describing specific embodiments and are not used to limit the present utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.
[0032] Please refer to Figure 1 and Figure 2 , this application provides an antenna 100. The antenna 100 is generally in a planar structure. The antenna 100 includes a dielectric layer 1, a radiation layer 2, and a radio frequency ground layer 3. The dielectric layer 1 has a first surface and a second surface, and the first surface and the second surface are oppositely arranged. The radiation layer 2 is disposed on the first surface. The radio frequency ground layer 3 is disposed at one end of the second surface.
[0033] In some embodiments, both the radiation layer 2 and the radio frequency ground layer 3 are made of metal.
[0034] For the above-mentioned radiation layer 2, please refer to Figure 3 , the radiation layer 2 includes a feeder 21, a resonator assembly 22, and a radiator 23. The feeder 21 and the resonator assembly 22 are disposed at one end of the first surface. One end of the feeder 21 is connected to the radiator 23, and the other end of the feeder 21 is used to be connected to a circuit board. The resonator assembly 22 is spaced apart from both sides of the feeder 21. The radiator 23 is disposed at one end of the first surface. The radiator 23, the feeder 21, and the resonator assembly 22 are all symmetrically arranged with respect to the central axis plane of the dielectric layer 1.
[0035] In some embodiments, the feeder 21 is a microstrip feeder, and the characteristic impedance of the feeder 21 is 50 ohms.
[0036] The resonator assembly 22 includes a first resonator 221 and a second resonator 222. The first resonator 221 is spaced on one side of the feeder 21, and the second resonator 222 is spaced on the other side of the feeder 21. By respectively arranging the first resonator 221 and the second resonator 222 on both sides of the feeder 21, the antenna 100 has a dual-notch characteristic.
[0037] The first resonator 221 includes a first branch 2211, a second branch 2212, a third branch 2213, and a fourth branch 2214. The first branch 2211 is parallel to the feeder 21, and the first branch 2211 is spaced from one side of the feeder 21. The second branch 2212 is connected to one end of the first branch 2211. The third branch 2213 is connected to the middle of the first branch 2211. The fourth branch 2214 is connected to the other end of the first branch 2211. The second branch 2212, the third branch 2213, and the fourth branch 2214 are all perpendicular to the first branch 2211, such that the shape of the first resonator 221 is in an E shape. The widths of the first branch 2211, the second branch 2212, the third branch 2213, and the fourth branch 2214 are all equal. The distances between the third branch 2213 and the second branch 2212 and the fourth branch 2214 are all equal. The lengths of the second branch 2212 and the fourth branch 2214 are equal.
[0038] The second resonator 222 includes a fifth stub 2221, a sixth stub 2222, a seventh stub 2223, and an eighth stub 2224. The fifth stub 2221 is parallel to the feeder 21, and the fifth stub 2221 is spaced from the other side of the feeder 21. The sixth stub 2222 is connected to one end of the first stub 2211. The seventh stub 2223 is connected to the middle of the fifth stub 2221. The eighth stub 2224 is connected to the other end of the fifth stub 2221. The sixth stub 2222, the seventh stub 2223, and the eighth stub 2224 are all perpendicular to the first stub 2211, such that the shape of the second resonator 222 is in an E shape. The widths of the fifth stub 2221, the sixth stub 2222, the seventh stub 2223, and the eighth stub 2224 are all equal. The distances between the seventh stub 2223 and the sixth stub 2222 and between the seventh stub 2223 and the eighth stub 2224 are both equal. The lengths of the sixth stub 2222 and the eighth stub 2224 are equal. Since the resonator assembly 22 is symmetrically arranged with respect to the central axis plane of the dielectric layer 1, the length of the first stub 2211 is equal to the length of the fifth stub 2221, and the widths of the fifth stub 2221, the sixth stub 2222, the seventh stub 2223, the eighth stub 2224, the first stub 2211, the second stub 2212, the third stub 2213, and the fourth stub 2214 are all equal, and the lengths of the second stub 2212, the fourth stub 2214, the sixth stub 2222, and the eighth stub 2224 are all equal, and the length of the third stub 2213 is equal to the length of the seventh stub 2223, and the distances between the third stub 2213 and the second stub 2212, between the third stub 2213 and the first stub 2211, between the seventh stub 2223 and the sixth stub 2222, and between the seventh stub 2223 and the eighth stub 2224 are all equal, and the distances between the first stub 2211 and the feeder 21 and between the fifth stub 2221 and the feeder 21 are all equal.
[0039] The radiator 23 includes a first radiation sheet 231, a second radiation sheet 232, and a third radiation sheet 233. The first radiation sheet 231 is connected to one end of the feeder 21, and the shape of the first radiation sheet 231 is rectangular. The second radiation sheet 232 is connected to one side of the first radiation sheet 231, and the shape of the second radiation sheet 232 is semi-elliptical. The third radiation sheet 233 is connected to the other side of the first radiation sheet 231, and the shape of the third radiation sheet 233 is semi-elliptical. The shape of the radiator 23 is drum-shaped by the rectangular first radiation sheet 231, the semi-elliptical second radiation sheet 232, and the third radiation sheet 233. Since the radiator 23 is symmetrically arranged with respect to the central axis plane of the dielectric layer 1, in other words, the first radiation sheet 231 is symmetrically arranged with respect to the central axis plane of the dielectric layer 1, and the second radiation sheet 232 and the third radiation sheet 233 are symmetrically arranged with respect to the central axis plane of the dielectric layer 1, the width of the first radiation sheet 231, the major axis length of the second radiation sheet 232, and the major axis length of the third radiation sheet 233 are all equal, and the minor axis length of the second radiation sheet 232 and the minor axis length of the third radiation sheet 233 are all equal.
[0040] For the above-mentioned RF ground layer 3, please refer to Figure 4 , the RF ground layer 3 is symmetrically arranged with respect to the central axis plane of the dielectric layer 1, the width of the RF ground layer 3 is equal to the width of the dielectric layer 1, and the RF ground layer 3 includes a first RF ground sheet 31, a second RF ground sheet 32, and a third RF ground sheet 33. The shapes of the first RF ground sheet 31, the second RF ground sheet 32, and the third RF ground sheet 33 are all rectangular. The first RF ground sheet 31 is arranged at one end of the second surface. One side of the first RF ground sheet 31 is connected to the second RF ground sheet 32, and the other side of the first RF ground sheet 31 is connected to the third RF ground sheet 33. One end of the second RF ground sheet 32 and one end of the third RF ground sheet 33 both protrude from the first RF ground sheet 31, so that a groove 34 is formed by enclosing the first RF ground sheet 31, the second RF ground sheet 32, and the third RF ground sheet 33. Since the RF ground layer 3 is symmetrically arranged with respect to the central axis plane of the dielectric layer 1, in other words, the first RF ground sheet 31 is symmetrically arranged with respect to the central axis plane of the dielectric layer 1, and the second RF ground sheet 32 and the third RF ground sheet 33 are symmetrically arranged with respect to the central axis plane of the dielectric layer 1, the length of the second RF ground sheet 32 and the length of the third RF ground sheet 33 are equal, and the length of the second RF ground sheet 32 and the width of the third RF ground sheet 33 are equal.
[0041] It should be noted that the radiation performance of the antenna 100 is determined by the size parameters of the radiator 23. The bandwidth and reflection coefficient of the antenna 100 are jointly determined by the size parameters of the RF ground layer 3 and the size parameters of the radiator 23. The center frequency of the notch and the isolation degree at the notch center frequency are jointly determined by the size parameters and positions of the resonator components 22.
[0042] To verify the concept of the antenna 100 in the embodiment of the present invention, the following simulation experiments are carried out:
[0043] The dielectric constant of dielectric layer 1 is 3.38, the dielectric loss is 0.0022, and the thickness of dielectric layer 1 is 0.2 mm. As Figure 3 and Figure 4 shown, both the radiation layer 2 and the RF ground layer 3 are copper-plated, and the thicknesses of the radiation layer 2 and the RF ground layer 3 are both 0.035 mm. The size parameters of the dielectric layer 1 are: L A = 11.5 mm, W A = 11 mm, where L A is the length of the dielectric layer 1, and W A is the width of the dielectric layer 1, which is 11. The size parameters of the feeder 21 are: L F = 4.5 mm, W F = 0.4 mm, where L F is the length of the feeder 21, and W F is the width of the feeder 21. The size parameters of the first resonator 221 and the second resonator 222 are: L1 = 1.5 mm, L2 = 1.2 mm, L3 = 1.3 mm, W1 = 0.2 mm, S = 0.15 mm, where L1 is the distance between the third branch 2213 and the second branch 2212, the distance between the third branch 2213 and the fourth branch 2214, the distance between the seventh branch 2223 and the sixth branch 2222, and the distance between the seventh branch 2223 and the eighth branch 2224; L2 is the length of the second branch 2212, the length of the fourth branch 2214, the length of the sixth branch 2222, and the length of the eighth branch 2224, L3 is the length of the third branch 2213 and the length of the seventh branch 2223, W1 is the width of the first branch 2211, the width of the second branch 2212, the width of the third branch 2213, the width of the fourth branch 2214, the width of the fifth branch 2221, the width of the sixth branch 2222, the width of the seventh branch 2223, and the width of the eighth branch 2224, and S is the distance between the first branch 2211 and the feeder 21 and the distance between the fifth bracket and the feeder 21. The setting parameters of the radiator 23 are: L P = 6.5 mm, L T = 2.6 mm, W P = 4.8 mm, where Lp is the width of the first radiation patch 231, the width of the second radiation patch 232, and the width of the third radiation patch 233, L T is the minor axis length of the second radiation patch 232 and the minor axis length of the third radiation patch 233, and W P is the length of the first radiation patch 231. The size parameters of the RF ground layer 3 are: L GM = 4.4 mm, L GRL = 5.5 mm, W GM = 8.4 mm, where L GMis the length of the first RF ground plane 31, L GRL are the lengths of the second RF ground plane 32 and the third RF ground plane 33, W GM is the width of the first RF ground plane 31.
[0044] Among them, the relationship between the center frequency f corresponding to the first notch N1 and the dimensional parameters of the resonator assembly 22 is:
[0045]
[0046] ε r is the dielectric constant of the dielectric layer 1.
[0047] Among them, the relationship between the center frequency f corresponding to the second notch N2 and the dimensional parameters of the resonator assembly 22 is:
[0048]
[0049] The simulation results of the antenna 100 of the present utility model Figure 5 are the simulation diagrams of the standing wave ratio of the antenna. As Figure 5 shown, the bandwidth range with a standing wave ratio less than 2 is from 9.8 GHz to 30.4 GHz, the center frequency is 20.1 GHz, the absolute bandwidth is 20.6 GHz, and the relative bandwidth is 102.5%, showing the characteristics of ultra-wideband; there are also three transmission poles in the passband of the antenna 100, and the three transmission poles are located at 11.7 GHz, 23.1 GHz, and 27.7 GHz respectively, ensuring the flatness of the maximum gain and radiation efficiency in the passband; there are also two notches in the passband of the antenna 100, located at 17 GHz and 26.3 GHz respectively, which can effectively suppress the in-band notches.
[0050] Figure 6 are the simulation diagrams of the maximum gain and radiation efficiency of the antenna 100. As Figure 6 shown, the average maximum gain of the antenna 100 in the passband is 3.88 dBi, showing the advantage of high maximum gain; the average radiation efficiency of the antenna 100 in the passband is 93.54%, showing the advantage of high radiation efficiency; at the center frequency of the first notch, the maximum gain of the antenna 100 is only -5.1 dBi, and the radiation efficiency is 26.39%; at the center frequency of the second notch, the maximum gain of the antenna 100 is only -6.56 dBi, and the radiation efficiency is 31.16%; lower than the average maximum gain and average radiation efficiency in the passband, it can be seen that there is high isolation at the center frequencies of the first notch and the second notch.
[0051] Figure 7 is the radiation pattern of the antenna 100 at 11.0 GHz Figure 8is the radiation pattern of antenna 100 at 28.0 GHz, as shown in Figure 7 and Figure 8 shown, the antenna 100 is an omnidirectional antenna 100.
[0052] In the embodiment of the present invention, the antenna 100 includes a dielectric layer 1, a radiation layer 2 and a radio frequency ground layer. The dielectric layer 1 has a first surface and a second surface, and the first surface and the second surface are oppositely arranged. The radiation layer 2 includes a feeder 21, a resonator assembly 22 and a radiator 23. The feeder 21 and the resonator assembly 22 are both arranged at one end of the first surface. One end of the feeder 21 is connected to the radiator 23. The resonator assembly 22 is arranged at intervals on both sides of the feeder 21. The radiator 23 is arranged at the other end of the first surface. The radio frequency ground layer 3 is arranged at one end of the second surface. By adding the resonator assembly 22 arranged at intervals on both sides of the feeder 21, the antenna 100 has a notch characteristic and can effectively suppress in-band interference.
[0053] The present invention also provides an embodiment of a communication device. The communication device includes the above-mentioned antenna 100. For the structure and function of the antenna 100, reference can be made to the above-mentioned embodiment, and details are not described herein one by one.
[0054] It should be noted that the description and drawings of the present invention give preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments are not additional limitations to the content of the present invention. The purpose of providing these embodiments is to make the understanding of the disclosed content of the present invention more thorough and comprehensive. Furthermore, the above technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as within the scope described in the specification of the present invention; further, for those of ordinary skill in the art, improvements or changes can be made according to the above description, and all such improvements and changes should fall within the protection scope of the appended claims of the present invention.
Claims
1. An antenna, characterized in that, Comprising: A dielectric layer having a first surface and a second surface, the first surface and the second surface being oppositely arranged; A radiation layer including a feeder, a resonator assembly, and a radiator, the feeder and the resonator assembly being disposed at one end of the first surface, one end of the feeder being connected to the radiator, the resonator assembly being spaced apart from both sides of the feeder, and the radiator being disposed at the other end of the first surface; A radio frequency ground layer disposed at one end of the second surface.
2. The antenna according to claim 1, wherein The resonator assembly includes a first resonator and a second resonator, the first resonator being spaced apart from one side of the feeder, the second resonator being spaced apart from the other side of the feeder, and the resonator assembly and the feeder being symmetrically arranged with respect to the central axis plane of the dielectric layer.
3. The antenna according to claim 2, wherein The first resonator includes a first branch, a second branch, a third branch, and a fourth branch, the first branch being parallel to the feeder and spaced apart from one side of the feeder, the second branch being connected to one end of the first branch, the third branch being connected to the middle of the first branch, the fourth branch being connected to the other end of the first branch, and the second branch, the third branch, and the fourth branch being perpendicular to the first branch.
4. The antenna according to claim 3, wherein The widths of the first branch, the second branch, the third branch, and the fourth branch are all equal, the distances between the third branch and the second branch and the fourth branch are both equal, and the lengths of the second branch and the fourth branch are equal.
5. The antenna according to claim 4, wherein The widths of the first branch, the second branch, the third branch, and the fourth branch are all 0.2 mm, the distances between the third branch and the second branch and the fourth branch are both 1.5 mm, the lengths of the second branch and the fourth branch are both 1.2 mm, and the distance between the first branch and the feeder is 0.15 mm.
6. The antenna according to claim 1, wherein The radiator includes a first radiation sheet, a second radiation sheet, and a third radiation sheet, the first radiation sheet being connected to one end of the feeder, one side of the first radiation sheet being connected to the second radiation sheet, and the other side of the first radiation sheet being connected to the third radiation sheet.
7. The antenna according to claim 6, wherein The radiator is symmetrically arranged with respect to the central axis plane of the dielectric layer.
8. The antenna according to claim 1, wherein The radio frequency ground layer includes a first radio frequency ground sheet, a second radio frequency ground sheet, and a third radio frequency ground sheet, one side of the first radio frequency ground sheet being connected to the second radio frequency ground sheet, the other side of the first radio frequency ground sheet being connected to the third radio frequency ground sheet, and the first radio frequency ground sheet, the second radio frequency ground sheet, and the third radio frequency ground sheet enclosing a groove.
9. The antenna according to claim 7, wherein The radio frequency formation is symmetrically arranged with respect to the central axis plane of the dielectric layer.
10. A communication device, characterized in that, Comprising the antenna according to any one of claims 1-9.