CN211350966U - Ultralow-profile dual-frequency UWB antenna and communication equipment - Google Patents
Ultralow-profile dual-frequency UWB antenna and communication equipment Download PDFInfo
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- CN211350966U CN211350966U CN201922033985.9U CN201922033985U CN211350966U CN 211350966 U CN211350966 U CN 211350966U CN 201922033985 U CN201922033985 U CN 201922033985U CN 211350966 U CN211350966 U CN 211350966U
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Abstract
The utility model discloses an ultra-low section dual-frenquency UWB antenna and communication equipment, include: the antenna comprises a dielectric substrate, a radiation patch, a feed portion and a signal input sheet, wherein the dielectric substrate at least sequentially comprises a first conductor layer, a second conductor layer and a third conductor layer; the feed part comprises a gradual change transmission line and a coupling feed sheet, one end of the gradual change transmission line is electrically connected with the coupling feed sheet, and the other end of the gradual change transmission line is electrically connected with the signal input sheet; the radiation patch is provided with a first symmetry axis and a second symmetry axis, the length of the radiation patch along the first symmetry axis is greater than that of the radiation patch along the second symmetry axis, and the coupling feed piece is arranged in a manner of deviating from the two symmetry axes of the radiation patch corresponding to the feed position on the radiation patch. The utility model has the technical characteristics of ultralow section, little interference, simple structure and low cost.
Description
Technical Field
The utility model belongs to the technical field of mobile communication, especially, relate to an ultralow section dual-frenquency UWB antenna and communications facilities.
Background
Under the background of the era of rapid development of everything interconnection, the acquisition and application of position information become more and more important. Compared with outdoor positioning, the indoor positioning working environment is more complex and fine, and the technology is more diverse. Compared with the traditional WIFI positioning, Bluetooth positioning and other technologies, the UWB positioning technology has the advantages of high transmission rate, strong multipath resolution, high precision, centimeter-level positioning precision and the like. Therefore, with the maturity of UWB chip schemes and the reduction of cost, UWB positioning technology is about to be widely applied.
The UWB positioning result is obtained by a plurality of sensors using TDOA or AOA positioning algorithms, so at least 2-3 antennas are required in use, and in the prior art, the method for implementing dual-band mainly has two feed sources to excite two different radiating elements simultaneously, i.e., dual-feed dual elements, or two feed sources excite two polarization resonances on two symmetry axes of the same element, i.e., dual-feed elements. With the development of communication technology, mobile communication devices such as mobile phones and notebook computers have more and more abundant functions, and the internal space is more and more tense. Under the condition that the edge of the mobile communication device is fully utilized by the traditional communication antenna, the setting space of the UWB antenna is limited to a non-clearance and small-space area, such as the back space of the communication device, and therefore, how to realize the low-profile and small-sized UWB antenna is a technical problem to be solved at present.
SUMMERY OF THE UTILITY MODEL
The technical purpose of the utility model is to provide an ultralow section dual-frenquency UWB antenna and communication equipment has ultralow section, disturbs little, simple structure, with low costs technical characterstic.
In order to solve the above problem, the technical scheme of the utility model is that:
an ultra-low profile dual-frequency UWB antenna comprising: the antenna comprises a dielectric substrate, a radiation patch, a feed portion and a signal input sheet, wherein the dielectric substrate at least sequentially comprises a first conductor layer, a second conductor layer and a third conductor layer;
the feed part comprises a gradual change transmission line and a coupling feed sheet, one end of the gradual change transmission line is electrically connected with the coupling feed sheet, and the other end of the gradual change transmission line is electrically connected with the signal input sheet; the radiation patch is provided with a first symmetry axis and a second symmetry axis, the length of the radiation patch along the first symmetry axis is greater than that of the radiation patch along the second symmetry axis, and the coupling feed piece is arranged in a manner of deviating from the two symmetry axes of the radiation patch corresponding to the feed position on the radiation patch.
Preferably, a metalized via hole or a metalized side wall is arranged between the second dielectric layer and the third dielectric layer along the peripheral side of the radiation patch, and the ground plate is electrically connected with the metalized via hole or the metalized side wall to form a conductor cavity.
Further preferably, a metalized via hole or a metalized side wall is further arranged between the second dielectric layer and the third dielectric layer along the peripheral side of the signal input sheet.
Further preferably, the tapered transmission line is electrically connected to the signal input pad through a probe or a via.
Further preferably, the line width of the gradual change transmission line is a gradual change line width to realize impedance matching.
Further preferably, the tapered transmission line is one or more of a microstrip line, a strip line and a coplanar waveguide.
Further preferably, the radiation patch is rectangular or elliptical or irregular biaxially symmetric shape.
Further preferably, the dielectric substrate is made of liquid crystal high molecular polymer, polyimide, teflon or ceramic.
Further preferably, the material of the radiation patch and the feeding portion is copper or silver or copper-nickel-gold plating or copper-nickel plating or tungsten alloy.
A communications device comprising an ultra-low profile dual-band UWB antenna as defined in any preceding embodiment.
Compared with the prior art, the utility model have following advantage and positive effect:
1) the utility model designs the length and width dimensions of the radiation patch to be different, so as to have different resonance frequencies in different polarization directions, and the feed position of the coupling feed piece deviates from two symmetrical axes of the radiation patch, so as to excite the resonance in two polarization directions simultaneously, and the two technologies are combined, so as to generate radiation on different resonance frequencies, namely, the single feed unit realizes double-frequency radiation, thus, compared with the double-feed unit and double-feed unit mode of realizing double-frequency in the prior art, the utility model only needs the single feed source and the single radiation patch, namely, the double-frequency antenna can be realized, and the structure is simplified, thereby not only effectively reducing the section thickness of the whole UWB antenna, but also reducing the processing difficulty and the cost, in addition, the coupling feed piece is utilized to carry out coupling radiation excitation to the radiation patch, and the direct electric connection between the feed part and the radiation patch is avoided, therefore, the bandwidth can be expanded, the processing difficulty is reduced, and the engineering stability is improved;
2) the utility model discloses a set up metallized sidewall or metallized via hole in the week side of radiation paster, signal input piece, form confined metal cavity, namely the conductor chamber with the ground plate, can realize the shielding good with the surrounding environment, maintain stable radiation performance in different environments, be favorable to UWB antenna to arrange in communication equipment's non-headroom region;
3) the utility model discloses a gradual change transmission line of feed portion is responsible for connecting coupling feed piece and signal input piece, can realize good impedance matching through gradual change line width when the design, and the gradual change transmission line is located the second conductor layer in the middle of the dielectric substrate, and the form can be microstrip line, stripline or coplanar waveguide transmission line, does not occupy extra section height, and the structure is more compact.
Drawings
Fig. 1 is a 3D perspective structure diagram of an ultra-low profile dual-frequency UWB antenna of the present invention;
fig. 2 is an appearance structure diagram of an ultra-low profile dual-frequency UWB antenna of the present invention;
fig. 3 is a laminated structure diagram of an ultra-low profile dual-frequency UWB antenna of the present invention;
fig. 4 is a simulation result diagram of reflection loss of an ultra-low profile dual-frequency UWB antenna of the present invention;
fig. 5 is a diagram of the efficiency simulation result of an ultra-low profile dual-frequency UWB antenna of the present invention;
fig. 6 is a 3D perspective structure diagram of a communication device of the present invention.
Description of reference numerals:
100-a dielectric substrate; 101-a radiating patch; 102-a metallized via; 103-ground plane; 300-a feed section; 301-coupling feed tab; 302-a tapered transmission line; 303-signal input pad; 01-a first axis of symmetry; 02-second axis of symmetry;
10-metal frame of mobile phone; 20-glass rear shell; 30-a battery; 40-a printed circuit board; 50-a radio frequency chipset; 60-ultra low profile dual frequency UWB antenna; 70-flat radio frequency cable.
Detailed Description
In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.
For the sake of simplicity, only the parts relevant to the present invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
The ultra-low profile dual-band UWB antenna and the communication device according to the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Example 1
Referring to fig. 1 and 2, the present application provides an ultra-low profile dual-band UWB antenna comprising: the antenna comprises a dielectric substrate 100, a radiation patch 101, a feed portion 300 and a signal input sheet 303, wherein the dielectric substrate 100 at least sequentially comprises a first conductor layer, a second conductor layer and a third conductor layer, the radiation patch 101 is arranged on the first conductor layer, the feed portion 300 is arranged on the second conductor layer, the signal input sheet 303 is arranged on the first conductor layer or the third conductor layer, and a grounding plate 103 is further arranged on the third conductor layer;
the feeding portion 300 comprises a tapered transmission line 302 and a coupling feeding sheet 301, wherein one end of the tapered transmission line 302 is electrically connected with the coupling feeding sheet 301, and the other end of the tapered transmission line 302 is electrically connected with a signal input sheet 303; the radiation patch 101 has a first symmetry axis 01 and a second symmetry axis 02, the length of the radiation patch 101 along the first symmetry axis 01 is greater than the length of the radiation patch 101 along the second symmetry axis 02, and the coupling feed plate 301 is disposed at a position offset from the two symmetry axes of the radiation patch 101 corresponding to the feed position on the radiation patch 101.
The present embodiment will now be described in detail:
referring to fig. 1 and 3, the dielectric substrate 100 of the present embodiment is manufactured by a microwave rf board process, and has a total of three conductor layers, which are a first conductor layer, a second conductor layer, and a third conductor layer from top to bottom.
Referring to fig. 1 and 2, the radiation patch 101 is disposed on the first conductor layer, the radiation patch 101 is in a biaxial symmetric shape and has a first symmetry axis 01 and a second symmetry axis 02, that is, the radiation patch 101 is axisymmetric with respect to the first symmetry axis 01 and the second symmetry axis 02, respectively, and the length of the radiation patch 101 along the first symmetry axis 01 is greater than the length of the radiation patch 101 along the second symmetry axis 02, that is, the radiation patch 101 is not uniform in length and width dimensions, so that the radiation patch 101 has different resonant frequencies in different polarization directions. Specifically, the radiation patch 101 of the present embodiment is rectangular, and further, the shape of the radiation patch 101 may be an ellipse or an irregular biaxial symmetric pattern, which may be adjusted according to the actual resonant frequency during design.
Referring to fig. 1 and 3, the feeding portion 300 is disposed on the second conductor layer, the coupling feeding plate 301 is disposed below the radiation patch 101, and the coupling feeding plate 301 is electrically connected to the signal input plate 303 through the tapered transmission line 302, wherein the position of the coupling feeding plate 301 is offset from the two symmetry axes of the radiation patch 101, that is, the position of the coupling feeding plate 301 is not symmetrically disposed about the two symmetry axes, so that the coupling feeding plate 301 can excite the resonance in the two polarization directions, and in combination with the radiation patches 101 with different lengths and widths, the radiation can be generated at different resonance frequencies, thereby implementing dual-frequency radiation of a single-feed unit. Specifically, referring to fig. 1, the coupling feed tab 301 of the present embodiment is designed in a circular shape and is disposed at an angular position of the radiation patch 101, and further, the matching position relationship between the coupling feed tab 301 and the radiation patch 101, and the shape and size of the coupling feed tab 301 can be adjusted according to the actual excitation result, so as to obtain a better excitation effect. The line width of the gradual change transmission line 302 is a gradual change line width to realize impedance matching during design, the gradual change transmission line 302 is one or more combinations of a microstrip line, a strip line and a coplanar waveguide, and the microstrip line is adopted in the specific embodiment, so that the additional section height is not occupied, and the structure is more compact.
Referring to fig. 1, the signal input pad 303 is disposed on the first conductor layer or the third conductor layer, and is electrically connected to the tapered transmission line 302 through a probe or a via hole, so as to facilitate feeding from the side by an external rf connector. The position of the signal input sheet 303 can be adjusted to a distance according to actual conditions, so that the connection with the outside is facilitated.
In the present embodiment, by designing the length and width dimensions of the radiation patch 101 to be different, so that different resonant frequencies are possessed in different polarization directions, and by deviating the feeding position of the coupling feed plate 301 from two symmetry axes of the radiation patch, the resonance in two polarization directions can be excited simultaneously, and by combining the two technologies, the radiation can be generated at different resonant frequencies, i.e. the single feed unit realizes dual-frequency radiation, so compared with the prior art in which the dual-frequency dual-feed unit (two feeds excite two different radiation units simultaneously) and dual-feed unit (two feeds excite two polarization resonances on two symmetry axes of the same unit) are realized, the present embodiment only needs a single feed and a single radiation patch 101, so as to realize a dual-frequency antenna, and is simplified in structure, thereby not only effectively reducing the profile thickness of the whole UWB antenna, in addition, the coupling feed sheet 301 is used for coupling radiation excitation on the radiation patch, so that direct electric connection between the feed part 300 and the radiation patch 101 is avoided, the processing difficulty is reduced while the bandwidth is expanded, and the engineering stability is improved.
Preferably, a metalized via hole 102 or a metalized sidewall is disposed between the first conductor layer and the third conductor layer along the peripheral side of the radiation patch 101, and the ground plate 103 is electrically connected with the metalized via hole 102 or the metalized sidewall to form a conductor cavity. The metalized sidewall or the metalized via hole 102 is prepared by a metalized deposition process, an electroplating process or a conductive paste coating process, the metalized sidewall or the metalized via hole 102 is electrically connected with the ground plate 103 to form a conductor cavity, and the conductor cavity is separated from the radiation patch 101, so that the periphery of the radiation patch 101 can form a closed metal cavity together with the metalized sidewall and the bottom metal floor, so that good shielding with the surrounding environment is realized, and stable radiation performance in different environments is maintained. The metalized via 102 is discontinuous, the metalized sidewall is continuous, the shielding effect of the metalized sidewall is better, but the processing difficulty is more complicated, while the metalized via 102 is simpler to process, and the embodiment adopts the discontinuous metalized via 102. Furthermore, the first dielectric layer is further provided with an interference shielding sheet, the interference shielding sheet can be specifically arranged in other areas of the first dielectric layer except the area of the radiation patch 101, and the interference shielding sheet is also electrically connected with the metalized side wall or the metalized via hole 102, so that a more closed metal cavity is formed, and the shielding effect of the surrounding environment is improved.
Preferably, along the peripheral side of the signal input sheet 303, a metalized via hole 102 or a metalized sidewall is further disposed between the first conductor layer and the third conductor layer, and the effect of the metalized via hole 102 or the metalized sidewall on the peripheral side of the radiation patch 101 is the same, and the metalized via hole 102 or the metalized sidewall on the peripheral side of the signal input sheet 303 is electrically connected with the ground plate 103 and/or the interference shielding sheet, so that a closed metal cavity can be formed, so as to achieve good shielding with the surrounding environment, and reduce the interference received by signal transmission to the outside.
In this embodiment, the metalized side walls or the metalized through holes 102 are disposed on the peripheral sides of the radiation patch 101 and the signal input patch 303, and form a closed metal cavity, i.e., a conductor cavity, with the ground plate 103, so as to achieve good shielding from the surrounding environment, maintain stable radiation performance in different environments, and facilitate the arrangement of the UWB antenna in a non-clearance area of the communication device, where the non-clearance area, such as an area where the communication device is adjacent to irrelevant components, such as a battery, an oscillator, a shielding case, and a camera, may interfere with the operation of the antenna to a certain extent.
Preferably, the material of the dielectric substrate 100 is liquid crystal polymer, polyimide, teflon or ceramic, and may also be polymer material with loss tangent less than 0.015, and ceramic and polymer mixture with loss tangent less than 0.015. The material of the radiation patch 101 and the feeding portion 300 is copper, silver, copper-nickel-gold plating, copper-nickel plating, or tungsten alloy, and may also be a copper-nickel-gold or copper-nickel layer attached to the surface.
The following description will be made with reference to the application of the present embodiment:
referring to fig. 1, based on the technical solution of the present embodiment, the present embodiment designs an ultra-low profile dual-frequency UWB antenna, and the design size is 13.3mm (length) × 11.2mm (width) × 0.361mm (thickness), so that the electrical size thickness of the antenna is less than 0.75%, and the antenna belongs to an ultra-low profile antenna. The size of the radiation patch of this embodiment is designed to be 9.3 × 11.5mm, the center of the coupling feed tab is located at a position deviated from the first symmetry axis by 3.1mm and deviated from the second symmetry axis by 4.6mm, referring to fig. 4 and 5, it can be seen from the simulation results of this antenna that the ultra-low profile dual-frequency UWB antenna based on the technical scheme of this embodiment can respectively cover two frequency bands with 6.5GHz (UWB channel 5) and 8GHz (UWB channel 9) as central frequency points, and basically meet the performance requirements of the UWB antenna, therefore, the technical scheme of this embodiment reaches the design purpose of the ultra-low profile and dual-frequency of this embodiment.
Example 2
Referring to fig. 6, the present application provides a communication device based on the ultra-low profile dual-band UWB antenna of embodiment 1, where the communication device is specifically a mobile phone in this embodiment, and specifically, the communication device may also be a tablet computer, a notebook, a smart watch, and the like. In this embodiment, the communication device includes a metal frame 10 of the mobile phone, a glass rear case 20, a battery 30, a printed circuit board 40, and a radio frequency chip set 50, wherein three ultra-low profile dual-frequency UWB antennas 60 are disposed between the battery 30 and the glass rear case 20, the thickness of the antennas is about 0.34mm, so that the back space of the mobile phone can be fully utilized, and the three ultra-low profile dual-frequency UWB antennas 60 are connected with the radio frequency chip set 50 through a flat radio frequency cable 70 to transmit signals.
Based on the communication device of the ultra-low profile dual-frequency UWB antenna in embodiment 1, the length and width dimensions of the radiation patch are designed to be different, so that different resonant frequencies are possessed in different polarization directions, and the feeding position of the coupling feed plate deviates from two symmetry axes of the radiation patch, so that resonance in two polarization directions can be excited at the same time, and the two technologies are combined to generate radiation in different resonant frequencies, that is, the single feed unit realizes dual-frequency radiation, so that compared with the prior art in which dual-frequency dual-feed (two feeds excite two different radiation units at the same time) and dual-feed (two feeds excite two polarization resonances on two symmetry axes of the same unit) are realized, the present embodiment can realize the dual-frequency antenna only by using a single feed and a single radiation patch, and is simplified in structure, so that not only the profile thickness of the whole antenna can be effectively reduced, in addition, the coupling feed sheet is used for coupling radiation excitation on the radiation patch, so that direct electric connection between the feed part and the radiation patch is avoided, the processing difficulty is reduced while the bandwidth is expanded, and the engineering stability is improved.
In addition, the metalized side walls or the metalized through holes are arranged on the peripheral sides of the radiation patch and the signal input sheet, and a closed metal cavity, namely a conductor cavity, is formed with the grounding plate, so that good shielding with the surrounding environment can be realized, stable radiation performance in different environments can be maintained, the arrangement of the UWB antenna in a non-clearance area of the communication equipment is facilitated, the non-clearance area, such as an area of the communication equipment adjacent to irrelevant parts, such as a battery, an oscillator, a shielding case, a camera and the like, can interfere with the operation of the antenna to a certain extent.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, the changes are still within the scope of the present invention if they fall within the scope of the claims and their equivalents.
Claims (10)
1. An ultra-low profile dual-frequency UWB antenna, comprising: the antenna comprises a dielectric substrate, a radiation patch, a feed portion and a signal input sheet, wherein the dielectric substrate at least sequentially comprises a first conductor layer, a second conductor layer and a third conductor layer, the radiation patch is arranged on the first conductor layer, the feed portion is arranged on the second conductor layer, the signal input sheet is arranged on the first conductor layer or the third conductor layer, and a grounding plate is further arranged on the third conductor layer;
the feed part comprises a gradual change transmission line and a coupling feed sheet, one end of the gradual change transmission line is electrically connected with the coupling feed sheet, and the other end of the gradual change transmission line is electrically connected with the signal input sheet; the radiation patch is provided with a first symmetry axis and a second symmetry axis, the length of the radiation patch along the first symmetry axis is greater than that of the radiation patch along the second symmetry axis, and the coupling feed sheet is arranged in a manner of deviating from the two symmetry axes of the radiation patch corresponding to the feed position on the radiation patch.
2. The ultra-low profile dual-band UWB antenna according to claim 1, wherein along the periphery of the radiating patch, a metalized via or a metalized sidewall is provided between the first conductor layer and the third conductor layer, and the ground plate is electrically connected to the metalized via or the metalized sidewall to form a conductor cavity.
3. The ultra-low profile dual-frequency UWB antenna according to claim 2, wherein the metalized via or the metalized sidewall is further provided between the first conductor layer and the third conductor layer along the peripheral side of the signal input pad.
4. The ultra-low profile dual-frequency UWB antenna according to claim 1, wherein the tapered transmission line is electrically connected to the signal input pad through a probe or via.
5. The ultra-low profile dual-frequency UWB antenna according to claim 1, wherein the line width of the tapered transmission line is a tapered line width to achieve impedance matching.
6. The ultra-low profile dual-frequency UWB antenna of claim 5 wherein the tapered transmission line is one or more combination of microstrip line, strip line, coplanar waveguide.
7. The ultra low profile dual frequency UWB antenna according to any of claims 1 to 6, wherein the radiating patch is rectangular or elliptical.
8. The ultra-low profile dual-frequency UWB antenna of any of claims 1-6 wherein the material of the dielectric substrate is liquid crystal high polymer or polyimide or Teflon or ceramic.
9. The ultra-low profile dual-frequency UWB antenna of any of claims 1-6 wherein the material of the radiating patch and the feed is copper or silver or cupronickel gold plating or cupronickel plating or tungsten alloy.
10. A communications device comprising an ultra low profile dual frequency UWB antenna as defined in any of claims 1 to 9.
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| CN201922033985.9U CN211350966U (en) | 2019-11-22 | 2019-11-22 | Ultralow-profile dual-frequency UWB antenna and communication equipment |
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| CN201922033985.9U CN211350966U (en) | 2019-11-22 | 2019-11-22 | Ultralow-profile dual-frequency UWB antenna and communication equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112436247A (en) * | 2020-11-02 | 2021-03-02 | 哈尔滨工业大学 | Adjustable balanced liquid crystal phase shifter with common-mode filtering function |
| CN113013596A (en) * | 2021-02-26 | 2021-06-22 | Oppo广东移动通信有限公司 | Antenna device, housing, and electronic apparatus |
| CN113410629A (en) * | 2021-05-31 | 2021-09-17 | 深圳市信维通信股份有限公司 | Antenna structure and electronic equipment based on UWB antenna and NFC antenna |
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2019
- 2019-11-22 CN CN201922033985.9U patent/CN211350966U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112436247A (en) * | 2020-11-02 | 2021-03-02 | 哈尔滨工业大学 | Adjustable balanced liquid crystal phase shifter with common-mode filtering function |
| CN113013596A (en) * | 2021-02-26 | 2021-06-22 | Oppo广东移动通信有限公司 | Antenna device, housing, and electronic apparatus |
| WO2022179324A1 (en) * | 2021-02-26 | 2022-09-01 | Oppo广东移动通信有限公司 | Antenna unit, housing, and electronic device |
| CN113013596B (en) * | 2021-02-26 | 2023-08-29 | Oppo广东移动通信有限公司 | Antenna device, housing and electronic equipment |
| CN113410629A (en) * | 2021-05-31 | 2021-09-17 | 深圳市信维通信股份有限公司 | Antenna structure and electronic equipment based on UWB antenna and NFC antenna |
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