Ultra-wideband antenna and communication terminal

Abstract

The embodiment of the utility model relates to the technical field of wireless communication, and particularly discloses an ultra wide band antenna and a communication terminal, comprising a dielectric layer provided with a first surface and a second surface arranged opposite to the first surface; the radiation layer is arranged on the first surface, the radiation layer comprises a radiation patch and a feeder line electrically connected with the radiation patch, and a gap is formed in the radiation patch; and the sunken ground layer is arranged on the second surface, and the sunken ground layer is coupled with the radiation layer. Through the above mode, the ultra-wideband antenna provided by the embodiment of the utility model has the advantages that the number of parts included in the ultra-wideband antenna is relatively small, the overall space structure is compact, and miniaturization is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to wireless communication technical field especially relates to a kind of ultra-wideband antennas and communication terminal. BACKGROUND

[0002] Since millimeter wave planar omnidirectional ultra-wideband antenna has the advantages of high transmission rate, low cost, light weight, simple design, easy integration with other components, etc., it has received extensive attention and in-depth research from scholars and engineers in the industry.

[0003] The inventor of the utility model found that, as one of the key devices of ultra-wideband wireless communication terminal, the ultra-wideband antenna often has the defect of large size, which greatly limits its use in modern miniaturized wireless communication terminals. SUMMARY

[0004] In view of the above problems, the utility model embodiment provides an ultra-wideband antenna and a communication terminal, which overcome the above problems or at least partially solve the above problems.

[0005] According to one aspect of the utility model, an ultra-wideband antenna is provided, which includes a dielectric layer, a first surface and a second surface opposite to the first surface are provided; a radiation layer is provided on the first surface, the radiation layer includes a radiation patch and a feed line electrically connected to the radiation patch, and a slot is provided on the radiation patch; a recessed ground layer is provided on the second surface, and the recessed ground layer is coupled to the radiation layer.

[0006] In an optional manner, the radiation patch includes a rectangular radiation patch, a first half-elliptical radiation patch, a second half-elliptical radiation patch and a third half-elliptical radiation patch, the first half-elliptical radiation patch is provided on the upper edge of the rectangular radiation patch, the second half-elliptical radiation patch and the third half-elliptical radiation patch are respectively provided on the two side edges of the rectangular radiation patch, and the feed line is provided on the lower edge of the rectangular radiation patch.

[0007] In an optional manner, the second half-elliptical radiation patch and the third half-elliptical radiation patch are symmetrically arranged relative to the rectangular radiation patch.

[0008] In an optional manner, the major axis length of the first half-elliptical radiation patch is equal to the length of the upper edge of the rectangular radiation patch.

[0009] In an alternative mode, the long axis length of the second half-elliptical radiation patch is equal to the long axis length of the third half-elliptical radiation patch, and the long axis length of the second half-elliptical radiation patch is equal to the length of one side of the rectangular radiation patch, and the long axis length of the third half-elliptical radiation patch is equal to the length of the other side of the rectangular radiation patch.

[0010] In an alternative mode, the slit includes a horizontal slit and a vertical slit, the horizontal slit and the vertical slit are in communication with each other, and the horizontal slit and the vertical slit are arranged in cross.

[0011] In an alternative mode, the recessed ground layer includes a first rectangular patch, a second rectangular patch and a third rectangular patch, the second rectangular patch is connected to the first rectangular patch and the third rectangular patch respectively, and the second rectangular patch is located between the first rectangular patch and the third rectangular patch.

[0012] In an alternative mode, the first rectangular patch and the third rectangular patch are symmetrical with respect to the second rectangular patch.

[0013] In an alternative mode, the median line of the radiation patch, the median line of the feed line and the median line of the recessed ground layer all coincide with the median line of the dielectric layer.

[0014] According to another aspect of the present application, a communication terminal is provided, comprising the ultra-wideband antenna as described above.

[0015] The present application has the advantages that: unlike the prior art, the present application has a dielectric layer, a radiation layer and a recessed ground layer. The dielectric layer has a first surface and a second surface opposite to the first surface, the radiation layer is arranged on the first surface, the radiation layer includes a radiation patch and a feed line connected to the radiation patch, and the radiation patch has a slit, the recessed ground layer is arranged on the second surface, and the recessed ground layer is coupled to the radiation layer. Thus, the ultra-wideband antenna has relatively few components, a compact overall structure and the advantage of miniaturization. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following description of the embodiments or the prior art will be briefly introduced. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual proportions.

[0017] Figure 1 is a schematic diagram of an angle of the overall structure of the ultra-wideband antenna of the present application embodiment;

[0018] Figure 2 is another angle view of the overall structure of the ultra-wideband antenna according to an embodiment of the present application;

[0019] Figure 3 is a side view of the overall structure of the ultra-wideband antenna according to an embodiment of the present application;

[0020] Figure 4 is a front view of the overall structure of the ultra-wideband antenna according to an embodiment of the present application;

[0021] Figure 5 is a back view of the overall structure of the ultra-wideband antenna according to an embodiment of the present application;

[0022] Figure 6 is a graph showing the change of the reflection coefficient of the ultra-wideband antenna according to an embodiment of the present application with different L P ;

[0023] Figure 7 is a graph showing the change of the reflection coefficient of the ultra-wideband antenna according to an embodiment of the present application with different W P ;

[0024] Figure 8 is a graph showing the change of the reflection coefficient of the ultra-wideband antenna according to an embodiment of the present application with different L GM ;

[0025] Figure 9 is a graph showing the change of the reflection coefficient of the ultra-wideband antenna according to an embodiment of the present application with different W GM ;

[0026] Figure 10 is a graph showing the change of the reflection coefficient of the ultra-wideband antenna according to an embodiment of the present application with different L S ;

[0027] Figure 11 is a graph showing the change of the reflection coefficient of the ultra-wideband antenna according to an embodiment of the present application with different W S ;

[0028] Figure 12 is a graph showing the change of the reflection coefficient of the ultra-wideband antenna according to an embodiment of the present application with different L VT ;

[0029] Figure 13 is a graph showing the change of the reflection coefficient of the ultra-wideband antenna according to an embodiment of the present application with different L HT ;

[0030] Figure 14 is a graph showing the simulation result of the reflection coefficient of the ultra-wideband antenna according to an embodiment of the present application;

[0031] Figure 15 is a simulation result schematic diagram of maximum gain and radiation efficiency of the ultra-wideband antenna of the embodiment of the present application;

[0032] Figure 16 is a radiation pattern of the ultra-wideband antenna of the embodiment of the present application at 10.0 GHz;

[0033] Figure 17 is a radiation pattern of the ultra-wideband antenna of the embodiment of the present application at 19.0 GHz;

[0034] Figure 18 is a radiation pattern of the ultra-wideband antenna of the embodiment of the present application at 28.0 GHz. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present application, the present application will be described in more detail below in combination with the drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element or one or more intervening elements can be present therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween. The terms "vertical", "horizontal", "left", "right", and similar expressions used in the specification are for illustrative purposes only.

[0036] Unless otherwise defined, all technical and scientific terms used in the specification are the same as those commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification includes any and all combinations of one or more related listed items.

[0037] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0038] Please refer to Figure 1 and Figure 2 , the ultra-wideband antenna 1000 comprises a dielectric layer 10, a radiation layer 20 and a recessed layer 30. The radiation layer 20 is arranged on one surface of the dielectric layer 10, and the recessed layer 30 is arranged on the other opposite surface of the dielectric layer 10. The dielectric layer 10, the radiation layer 20 and the recessed layer 30 are described in detail below.

[0039] For the above-mentioned dielectric layer 10, as Figures 1-3As shown, the dielectric layer 10 is provided with a first surface 10a and a second surface 10b opposite to the first surface 10a. It can be understood that the material of the dielectric layer 10 can be selected according to actual needs, for example, it can be one or more of polyimide, polytetrafluoroethylene, polyethylene, ceramic or other polymer composites.

[0040] For the above-mentioned radiation layer 20, as Figures 1-3 As shown, the radiation layer 20 is arranged on the first surface 10a, and the radiation layer 20 includes a radiation patch 201 and a feed line 202 electrically connected to the radiation patch 201. The feed line 202 is electrically connected to the radiation patch 201, and the feed line 202 is a line that connects the radiation patch 201 and other signal processing systems to form a signal transmission path. It can be of any suitable type, with sufficient shielding and signal transmission performance. It should be noted that the radiation patch 201 refers to a resonant unit for receiving or transmitting wireless signals of a specific frequency band, which is the core of the entire ultra-wideband antenna. In some embodiments, the characteristic impedance of the feed line 202 is 50 ohms.

[0041] It can be understood that the radiation patch 201 is a conductor with a specific shape and length, which can be fixed to the dielectric layer 10 in any suitable form and exposed to the outside, and can receive or transmit wireless signals of a specific frequency band through electromagnetic induction principle.

[0042] In some embodiments, the radiation patch 201 is provided with a slot 201a, the slot 201a includes a transverse slot 201aa and a vertical slot 201ab, the transverse slot 201aa and the vertical slot 201ab are in communication with each other, and the transverse slot 201aa and the vertical slot 201ab are arranged in cross, thereby forming a "cross" slot 201a. The arrangement of the slot 201a can increase the bandwidth of the antenna, so that the antenna works in a wider frequency range.

[0043] In some embodiments, the radiation patch 201 includes a rectangular radiation patch 2011, a first half-elliptical radiation patch 2012, a second half-elliptical radiation patch 2013, and a third half-elliptical radiation patch 2014, the first half-elliptical radiation patch 2012 is arranged on the upper edge of the rectangular radiation patch 2011, the second half-elliptical radiation patch 2013 and the third half-elliptical radiation patch 2014 are arranged on the two side edges of the rectangular radiation patch 2011 respectively, and the feed line 202 is arranged on the lower edge of the rectangular radiation patch 2011. Among them, the design and analysis of the rectangular radiation patch 2011 are relatively simple, and theoretical calculation and simulation can be easily carried out. The rectangular radiation patch 2011 can improve the gain by increasing the length and width, thereby enhancing the transmission and reception capability of the signal. The rectangular radiation patch 2011 is easy to integrate with other electronic components, and is suitable for compact devices and systems, for example, it can be easily integrated into mobile phones, tablets and other portable devices. In addition, the elliptical radiation patch generally has a wider beam, which can cover a wider area, and the frequency dependence of the elliptical radiation patch is relatively small, which can maintain stable performance in a wider frequency range.

[0044] In some embodiments, the second half-elliptical radiation patch 2013 and the third half-elliptical radiation patch 2014 are symmetrically arranged relative to the rectangular radiation patch 2011. In this way, the symmetrically arranged half-elliptical radiation patch can enhance the clarity and directivity of the main beam, improve the gain of the antenna, and help to achieve uniform distribution and effective conduction of radiation energy.

[0045] In some embodiments, the length of the major axis of the first half-elliptical radiation patch 2012 is equal to the length of the upper edge of the rectangular radiation patch 2011.

[0046] In some embodiments, the length of the major axis of the second half-elliptical radiation patch 2013 is equal to the length of the major axis of the third half-elliptical radiation patch 2014, the length of the major axis of the second half-elliptical radiation patch 2013 is equal to the length of one side edge of the rectangular radiation patch 2011, and the length of the major axis of the third half-elliptical radiation patch 2014 is equal to the length of the other side edge of the rectangular radiation patch 2011.

[0047] For the above-mentioned recessed stratum 30, as shown in Figures 1-3 The recessed stratum 30 is arranged on the second surface 10b, the recessed stratum 30 is coupled with the radiation layer 20, and the radiation layer 20 transmits electromagnetic wave signals to the recessed stratum 30.

[0048] In some embodiments, the recessed layer 30 comprises a first rectangular patch 301, a second rectangular patch 302 and a third rectangular patch 303, the second rectangular patch 302 is connected to the first rectangular patch 301 and the third rectangular patch 303 respectively, and the second rectangular patch 302 is located between the first rectangular patch 301 and the third rectangular patch 303. In this way, a larger effective area can be formed, and the definition and directivity of the main beam can be enhanced.

[0049] In some embodiments, the first rectangular patch 301 and the third rectangular patch 303 are symmetrical with respect to the second rectangular patch 302. The symmetrical arrangement of the rectangular patches can ensure the consistent performance of the antenna in all directions, and improve the symmetry and balance of the antenna.

[0050] In some embodiments, the median line of the radiating patch 201, the median line of the feed line 202, and the median line of the recessed layer 30 all coincide with the median line of the dielectric layer 10. In this way, the performance of the antenna can be significantly improved, including gain, directivity, bandwidth, frequency stability, efficiency, and anti-interference ability.

[0051] Please refer to Figure 4 and Figure 5 For this ultra-wideband antenna, the key parameters that affect the performance of the antenna include: the length L P of the rectangular radiating patch 2011, the width W P of the rectangular radiating patch 2011, the length L GM of the second rectangular patch 302, the width W GM of the second rectangular patch 302, the arm length L S of the "cross" slot 201a, the arm width W S of the "cross" slot 201a, the short axis length L VT of the second half-elliptical radiating patch 2013 and the third half-elliptical radiating patch 2014, the short axis length L HT of the first half-elliptical radiating patch 2012. By optimizing these key parameters, the desired antenna performance can be obtained.

[0052] To more thoroughly illustrate the structure of the present application, an example is provided here. In this design example, the dielectric constant of the dielectric layer 10 is 3.38, the dielectric loss is 0.0022, the thickness is 0.2 mm, the radiating layer 20 and the recessed layer 30 are copper-plated, and the thickness is 0.035 mm. The front and back of the layout of this design example are shown in Figure 4 and Figure 5 , where L A is the length of the dielectric layer 10, W A is the width of the dielectric layer 10, L PW is the length of the rectangular radiating patch 2011 P L is the width of the rectangular radiating patch 2011 GM W is the length of the second rectangular patch 302 GM L is the width of the second rectangular patch 302 S W is the arm length of the "cross" slot 201a S L is the arm width of the "cross" slot 201a VT L is the length of the short axis of the second half-elliptical radiating patch 2013 and the third half-elliptical radiating patch 2014 HT L is the length of the short axis of the first half-elliptical radiating patch 2012 F W is the length of the feed line 202 F L is the width of the feed line 202 GRL W is the length of the first rectangular patch 301 and the length of the third rectangular patch 303.

[0053] For the structure of the above-mentioned ultra-wideband antenna 1000, the key parameters L P , W P , L GM , W GM , L S , W S , L VT and L HT need to be optimized to obtain the desired antenna performance. The following is a study of the effects of these key parameters on the antenna performance:

[0054] Referring to Figure 6 , Figure 6 is a graph showing the variation of the reflection coefficient of the above-mentioned ultra-wideband antenna with different L P , the parameter L P is 5.5mm, 6.0mm and 6.5mm respectively, it can be seen from Figure 6 that as the parameter L P increases, the lower passband edge and the upper passband edge of the antenna both move downward, the passband bandwidth slightly decreases, the center frequency decreases, and the reflection coefficient within the passband bandwidth decreases.

[0055] Referring to Figure 7 , Figure 7 is a graph showing the variation of the reflection coefficient of the above-mentioned ultra-wideband antenna with different W P , the parameter W P is 4.0mm, 4.8mm and 5.6mm respectively, it can be seen from Figure 7 that as the parameter W P increases, the passband bandwidth of the antenna becomes narrower, and the reflection coefficient within the passband bandwidth becomes larger.

[0056] Referring to Figure 8 ,Figure 8 is the reflection coefficient of the above-mentioned ultra-wideband antenna with different L GM , and the parameter L GM is 3.7mm, 3.8mm and 3.9mm respectively, it can be known from the figure that, with the increase of the parameter L Figure 8 , the passband bandwidth of the antenna becomes narrower, and the reflection coefficient in the passband bandwidth becomes larger. GM

[0057] Please refer to Figure 9 , Figure 9 is the reflection coefficient of the above-mentioned ultra-wideband antenna with different W GM , and the parameter W GM is 8.0mm, 10.0mm and 12.0mm respectively, it can be known from the figure that, with the increase of the parameter W GM , the passband bandwidth of the antenna becomes narrower, and the reflection coefficient in the passband bandwidth becomes larger. Figure 9

[0058] Please refer to Figure 10 , Figure 10 is the reflection coefficient of the above-mentioned ultra-wideband antenna with different L S , and the parameter L S is 1.5mm, 2.0mm and 2.5mm respectively, it can be known from the figure that, with the increase of the parameter L S , the passband bandwidth of the antenna becomes narrower, and the reflection coefficient in the passband bandwidth becomes larger. Figure 10

[0059] Please refer to Figure 11 , Figure 11 is the reflection coefficient of the above-mentioned ultra-wideband antenna with different W S , and the parameter W S is 0.1mm, 0.2mm and 0.3mm respectively, it can be known from the figure that, with the increase of the parameter W S , the passband bandwidth of the antenna does not change, and the reflection coefficient in the passband bandwidth becomes slightly larger. Figure 11

[0060] Please refer to Figure 12 , Figure 12 is the reflection coefficient of the above-mentioned ultra-wideband antenna with different L VT , and the parameter L VT is 2.0mm, 2.6mm and 3.2mm respectively, it can be known from the figure that, with the increase of the parameter L VT , the passband bandwidth of the antenna becomes larger, and the reflection coefficient in the passband bandwidth becomes smaller. Figure 12

[0061] Please refer to Figure 13 , Figure 13 is the reflection coefficient of the above-mentioned ultra-wideband antenna with different L HT ​​​​​The graph showing the change of parameter L HT The thicknesses are 1.2mm, 1.6mm, and 2.0mm respectively, and are made from... Figure 13 It can be seen that, with the parameter L HT As the value increases, the antenna's passband bandwidth remains almost unchanged, but the reflection coefficient within the passband bandwidth increases.

[0062] Based on the above analysis, a set of parameters can be optimized, specifically: L A =11.0mm, W A =11.0mm,L GM =3.3mm,L GRL =5.0mm,W GM =8.2mm,L P =6.5mm,W P =4.0mm,L VT =2.6mm,L HT =1.6mm,L S =2.0mm,W S =0.1mm,L F =3.5mm,W F =0.4mm. The reflection coefficient of the optimized ultra-wideband antenna is as follows: Figure 14 As shown, by Figure 14 It can be seen that the bandwidth range with a reflection coefficient less than -10dB is from 10.2GHz to 29.8GHz, the center frequency is 20.0GHz, the absolute bandwidth is 19.6GHz, and the relative bandwidth is 98%, showing ultra-wideband characteristics; within the passband, there are also two transmission poles, located at 14.5GHz and 34.7GHz respectively, ensuring the flatness of maximum gain and radiation efficiency within the passband.

[0063] Figure 15 Simulation results of the antenna's maximum gain and radiation efficiency are presented. As can be seen from the figure, within the passband, the average maximum gain is 3.99 dBi, demonstrating the advantage of high maximum gain; within the passband, its average radiation efficiency is 97.67%, demonstrating the advantage of high radiation efficiency.

[0064] The radiation pattern of the ultra-wideband antenna based on the above optimized parameters is as follows: Figures 16-18 As shown, Figure 16 This is the radiation pattern of an ultra-wideband antenna at 10.0 GHz. Figure 17 This is the radiation pattern of an ultra-wideband antenna at 19.0 GHz. Figure 18 This is the radiation pattern of an ultra-wideband antenna at 28.0 GHz, derived from... Figures 16-18 It is easy to see that this ultra-wideband antenna is an omnidirectional antenna.

[0065] In the embodiment of the utility model, set up medium layer 10, radiation layer 20 and recessed ground layer 30, wherein, medium layer 10 is provided with first surface 10a and second surface 10b opposite to first surface 10a, radiation layer 20 is arranged on first surface 10a, radiation layer 20 includes radiation patch 201 and feed line 202 connected with radiation patch 201, and the gap 201a is arranged on the radiation patch 201, the recessed ground layer 30 is arranged on the second surface 10b, the recessed ground layer 30 is coupled with the radiation layer 20, in this way, the components included in the ultra-wideband antenna are relatively less, the overall space structure is compact, and the miniaturization advantage is had.

[0066] The utility model further provides an embodiment of communication terminal, and the communication terminal includes the ultra-wideband antenna 1000 as described above, and the function and structure of ultra-wideband antenna 1000 can refer to the above embodiment, and here will not be repeated.

[0067] The above is only the embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation using the content of the utility model specification and drawings, or direct or indirect application in other related technical fields, are all included in the patent protection range of the utility model.

Claims

1. An ultra-wideband antenna, characterized by, The ultra-wideband antenna comprises: a medium layer, provided with a first surface and a second surface opposite to the first surface; a radiation layer, provided on the first surface, the radiation layer comprising a radiation patch and a feed line electrically connected to the radiation patch, and a slit provided on the radiation patch; a recessed ground layer, provided on the second surface, the recessed ground layer being coupled with the radiation layer.

2. The ultra-wideband antenna according to claim 1, wherein: the radiation patch comprises a rectangular radiation patch, a first half-elliptical radiation patch, a second half-elliptical radiation patch and a third half-elliptical radiation patch, the first half-elliptical radiation patch is provided on the upper edge of the rectangular radiation patch, the second half-elliptical radiation patch and the third half-elliptical radiation patch are respectively provided on the two side edges of the rectangular radiation patch, and the feed line is provided on the lower edge of the rectangular radiation patch.

3. The ultra-wideband antenna according to claim 2, wherein: the second half-elliptical radiation patch and the third half-elliptical radiation patch are symmetrically provided with respect to the rectangular radiation patch.

4. The ultra-wideband antenna according to claim 2, wherein: the major axis length of the first half-elliptical radiation patch is equal to the length of the upper edge of the rectangular radiation patch.

5. The ultra-wideband antenna according to claim 2, wherein: the major axis length of the second half-elliptical radiation patch is equal to the major axis length of the third half-elliptical radiation patch, the major axis length of the second half-elliptical radiation patch is equal to the length of one side edge of the rectangular radiation patch, and the major axis length of the third half-elliptical radiation patch is equal to the length of the other side edge of the rectangular radiation patch.

6. The ultra-wideband antenna according to claim 1, wherein: the slit comprises a horizontal slit and a vertical slit, the horizontal slit and the vertical slit are in communication with each other, and the horizontal slit and the vertical slit are crosswise provided.

7. The ultra-wideband antenna according to claim 1, wherein: the recessed ground layer comprises a first rectangular patch, a second rectangular patch and a third rectangular patch, the second rectangular patch is connected to the first rectangular patch and the third rectangular patch respectively, and the second rectangular patch is located between the first rectangular patch and the third rectangular patch.

8. The ultra-wideband antenna according to claim 7, wherein: the first rectangular patch and the third rectangular patch are symmetric with respect to the second rectangular patch.

9. The ultra-wideband antenna according to claim 1, wherein: the median line of the radiation patch, the median line of the feed line and the median line of the recessed ground layer all coincide with the median line of the medium layer.

10. A communication terminal, characterized by The ultra-wideband antenna according to any one of claims 1-9.

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