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 connected with the radiation patch, two first gaps are formed in the radiation layer, and the two first gaps are arranged in parallel in the width direction of the feeder line; the two first gaps are located at the joint of the radiation patch and the feeder line, and a transmission zero point is introduced into the two first gaps; 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 antenna provided by the embodiment of the utility model can improve the direction selectivity of the antenna.

Description

Technical Field

[0001] This utility model relates to the field of wireless communication technology, and in particular to an ultra-wideband antenna and communication terminal. Background Technology

[0002] Millimeter-wave planar omnidirectional ultra-wideband antennas have attracted widespread attention and in-depth research from scholars and engineers in the industry due to their advantages such as high transmission rate, low cost, light weight, simple design, and easy integration with other components.

[0003] In the process of realizing this utility model, the inventors discovered that existing ultra-wideband antennas have weak ability to suppress out-of-band signals and do not have high out-of-band selectivity, which greatly limits their use in modern wireless communication terminals. Utility Model Content

[0004] In view of the above problems, this utility model provides an ultra-wideband antenna and communication terminal, which overcomes or at least partially solves the above problems.

[0005] According to one aspect of the present invention, an ultra-wideband antenna is provided, comprising a dielectric layer having a first surface and a second surface disposed opposite to the first surface; a radiating layer disposed on the first surface, the radiating layer including a radiating patch and a feed line connected to the radiating patch, the radiating layer having two first slots disposed on it, the two first slots being arranged parallel to each other along the width direction of the feed line, the two first slots being located at the connection between the radiating patch and the feed line, and the two first slots introducing a transmission null; and a recessed ground layer disposed on the second surface, the recessed ground layer being coupled to the radiating layer.

[0006] In one alternative approach, the lengths of the two first gaps are equal along the length direction of the feed line.

[0007] In one alternative approach, the widths of the two first gaps are equal along the width direction of the feed line.

[0008] In one alternative, along the width direction of the feed line, the two first gaps, the feed line, the radiating patch, and the recessed stratum are all symmetrically arranged with respect to the centerline of the dielectric layer.

[0009] In one alternative approach, the frequency f corresponding to the transmission zero point Z The following conditions must be met with the first gap:

[0010]

[0011] Where, ε rLet L be the dielectric constant of the medium, c be the speed of light in a vacuum, and L be the dielectric constant of the medium. I The length of the first gap.

[0012] In one alternative embodiment, the radiating patch is trapezoidal and has a second slit, which is symmetrically arranged about the centerline of the radiating patch along the width direction of the feed line.

[0013] In one alternative approach, the second gap is a square gap.

[0014] In one alternative embodiment, the depressed formation includes a first rectangular patch, a second rectangular patch, and a third rectangular patch, wherein the second rectangular patch is connected to the first rectangular patch and the third rectangular patch, and the second rectangular patch is located between the first rectangular patch and the third rectangular patch.

[0015] In one alternative approach, the first rectangular patch and the third rectangular patch are symmetrical with respect to the second rectangular patch.

[0016] According to another aspect of the present invention, a communication terminal is provided, including the ultra-wideband antenna as described above.

[0017] The beneficial effects of this utility model embodiment are as follows: Unlike existing technologies, this utility model embodiment includes a dielectric layer, a radiating layer, and a recessed ground layer. The dielectric layer has a first surface and a second surface opposite to the first surface. The radiating layer is disposed on the first surface and includes a radiating patch and a feed line connected to the radiating patch. Two first slots are disposed on the radiating layer, parallel to each other along the width of the feed line, and located at the connection between the radiating patch and the feed line. These two first slots introduce transmission nulls. The recessed ground layer is disposed on the second surface and coupled to the radiating layer. This configuration allows the two first slots to introduce transmission nulls through electromagnetic coupling, phase difference, and mode conversion. By introducing transmission nulls, radiation in certain directions can be suppressed at specific frequencies, thereby improving the antenna's selectivity at these frequencies and further enhancing its directional selectivity to meet the requirements of modern wireless communication terminals. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments of this utility model or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. 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 to actual scale.

[0019] Figure 1 This is a schematic diagram of the overall structure of the ultra-wideband antenna according to an embodiment of the present invention from an angle.

[0020] Figure 2 This is another schematic diagram of the overall structure of the ultra-wideband antenna according to an embodiment of this utility model;

[0021] Figure 3 This is a side view of the overall structure of the ultra-wideband antenna according to an embodiment of the present invention;

[0022] Figure 4 This is a front view of the overall structure of the ultra-wideband antenna according to an embodiment of this utility model;

[0023] Figure 5 This is a schematic diagram of the reverse side of the overall structure of the ultra-wideband antenna according to an embodiment of this utility model;

[0024] Figure 6 This is a schematic diagram of the simulation results of the standing wave ratio of the ultra-wideband antenna according to an embodiment of this utility model;

[0025] Figure 7 This is a schematic diagram showing the simulation results of the maximum gain and radiation efficiency of the ultra-wideband antenna according to an embodiment of this utility model;

[0026] Figure 8 This is the radiation pattern of the ultra-wideband antenna of this utility model embodiment at 10.0 GHz;

[0027] Figure 9 This is the radiation pattern of the ultra-wideband antenna of this utility model embodiment at 20.0 GHz;

[0028] Figure 10 This is the radiation pattern of the ultra-wideband antenna of this utility model embodiment at 30.0 GHz. Detailed Implementation

[0029] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0031] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0032] Please see Figure 1 The ultra-wideband antenna 1000 includes a dielectric layer 10, a radiating layer 20, and a recessed ground layer 30. The radiating layer 20 is disposed on one surface of the dielectric layer 10, and the recessed ground layer 30 is disposed on the other opposite surface of the dielectric layer 10. The dielectric layer 10, the radiating layer 20, and the recessed ground layer 30 are described in detail below.

[0033] For the aforementioned dielectric layer 10, such as Figures 1-3 As shown, the dielectric layer 10 is provided with a first surface 10a and a second surface 10b disposed opposite to the first surface 10a. It is 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 composite materials.

[0034] For the aforementioned radiation layer 20, such as Figures 1-3 As shown, the radiating layer 20 is disposed on the first surface 10a. The radiating layer 20 includes a radiating patch 201 and a feed line 202 electrically connected to the radiating patch 201. The feed line 202 is electrically connected to the radiating patch 201 and is a line connecting the radiating patch 201 with other signal processing systems to form a signal transmission path. Specifically, it can be any suitable type of wire with sufficient shielding and signal transmission performance. It should be noted that the radiating patch 201 refers to a resonant unit used to receive or transmit wireless signals in a specific frequency band, and is the core of the entire ultra-wideband antenna. In some embodiments, the characteristic impedance of the feed line 202 is 50 ohms.

[0035] In some embodiments, the radiating layer 20 is provided with two first slots 201a, which are arranged parallel to each other along the width direction of the feed line 202. The two first slots 201a are located at the connection between the radiating patch 201 and the feed line 202, and the two first slots 201a introduce transmission nulls. With this configuration, the two first slots 201a can introduce transmission nulls through electromagnetic coupling, phase difference, and mode conversion. By introducing transmission nulls, radiation in certain directions can be suppressed at specific frequencies, thereby improving the selectivity of the antenna at these frequencies and further improving the directional selectivity of the antenna to meet the requirements of the antenna in current wireless communication terminals.

[0036] In some embodiments, the lengths of the two first slots 201a are equal along the length direction of the feed line 202. This arrangement ensures the symmetry of the antenna, thereby achieving consistent radiation characteristics in the symmetrical direction. At the same time, it makes the electromagnetic field distribution between the two first slots 201a more uniform, thereby improving the performance of the antenna.

[0037] In some embodiments, the widths of the two first slots 201a are equal along the width direction of the feed line 202. This arrangement can reduce phase distortion and ensure that the radiation characteristics of the antenna are more consistent in different directions, which helps to improve the antenna's pattern stability and selectivity.

[0038] In some embodiments, along the width direction of the feed line 202, the two first gaps 201a, the feed line 202, the radiating patch 201, and the recessed ground layer 30 are all symmetrically arranged with respect to the center line of the dielectric layer 10. This arrangement makes the electromagnetic field distribution of the antenna more uniform, thereby reducing complex electromagnetic field calculations and improving the radiation efficiency and pattern stability of the antenna.

[0039] In some embodiments, the frequency f corresponding to the transmission zero point Z The following conditions must be met between the first gap 201a and the gap:

[0040]

[0041] Where, ε r Let L be the dielectric constant of the medium, c be the speed of light in a vacuum, and L be the dielectric constant of the medium. I The length of the first gap 201a.

[0042] It is understood that the radiating patch 201 is a conductor with characteristic shape and length, which can be fixed to the dielectric layer 10 in any suitable form and exposed to the outside, so as to receive or transmit wireless signals of a specific frequency band through the principle of electromagnetic induction.

[0043] In some embodiments, the radiating patch 201 is trapezoidal, and a second slit 201b is provided on the radiating patch 201. The second slit 201b is symmetrically arranged about the center line of the radiating patch 201 along the width direction of the feed line 202. Optionally, the second slit 201b is a square slit.

[0044] For the aforementioned depression stratum 30, such as Figures 1-3 As shown, the depression stratum 30 is disposed on the second surface 10b, the depression stratum 30 is coupled to the radiation layer 20, and the radiation layer 20 transmits electromagnetic wave signals to the depression stratum 30.

[0045] In some embodiments, the recessed stratum 30 includes 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. The second rectangular patch 302 is located between the first rectangular patch 301 and the third rectangular patch 303. This arrangement can form a larger effective area and enhance the clarity and directionality of the main beam.

[0046] 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 that the antenna performance is consistent in all directions, thereby improving the symmetry and balance of the antenna.

[0047] Please refer to the following: Figure 4 and Figure 5 For this ultra-wideband antenna, the key parameters affecting antenna performance include: the length L of the dielectric layer 10. A The width W of dielectric layer 10 A The length L of the second rectangular patch 302 M The width W of the second rectangular patch 302 M The lengths of the first rectangular patch 301 and the third rectangular patch 303 are both L. UD The length L of the base of the trapezoidal radiating patch 201 L The top edge length L of the trapezoidal radiating patch 201 H The height H of the trapezoidal radiating patch 201, and the side length L of the square second slit 201b. R The distance D1 from the first slit 201a to the left side of the dielectric layer 10, the distance D2 between the two first slits 201a, and the length L of the first slit 201a. I The width W of the first gap 201a I The length L of feeder 202 F and the width W of feeder 202 FBy optimizing these key parameters, the desired antenna performance can be obtained.

[0048] To further illustrate the structure proposed in this utility model, an example is provided here. In this design example, the dielectric layer 10 has a dielectric constant of 3.38, a dielectric loss of 0.0022, and a thickness of 0.4 mm. The radiating layer 20 and the recessed ground layer 30 are copper-plated with a thickness of 0.035 mm. The front and back sides of this design example layout are shown below. Figure 4 and Figure 5 As shown. Where, L A W is the length of dielectric layer 10. A L is the width of dielectric layer 10. M W is the length of the second rectangular patch 302. M L is the width of the second rectangular patch 302. UD L represents the lengths of the first rectangular patch 301 and the third rectangular patch 303. L L is the length of the base of the trapezoidal radial patch 201. H L is the length of the top edge of the trapezoidal radiating patch 201, H is the height of the trapezoidal radiating patch 201, and L is the height of the trapezoidal radiating patch 201. R Let L be the side length of the square second slit 201b, D1 be the distance from the first slit 201a to the left side of the dielectric layer 10, D2 be the distance between the two first slits 201a, and L be the distance between them. I W is the length of the first gap 201a. I L is the width of the first gap 201a. F For the length of feeder 202 and W F This is the width of feeder 202.

[0049] To more concretely illustrate the structure proposed in this utility model, a design example is provided. The optimized parameters of the design example are: L A =10.4mm, W A =10.4mm, LM=3.3mm, L UD =4.3mm, W M =6.8mm, L L =6.8mm, L H =4.8mm, H=6.3mm, L R =2.0mm, D1=2.0mm, D2=0.44mm, L I =2.87mm, W I =0.1mm, L F =3.6mm, W F =0.84mm. The VSWR of the optimized ultra-wideband antenna is... Figure 6 As shown, by Figure 6It can be seen that the impedance bandwidth range of less than 2 is 9.59 to 31.65 GHz, with a center frequency of 20.62 GHz, an absolute bandwidth of 22.06 GHz, and a relative bandwidth of 107%, exhibiting ultra-wideband characteristics. Within the passband, there are four transmission poles located at 12.61 GHz, 17.39 GHz, 23.99 GHz, and 29.42 GHz, respectively, ensuring the flatness of maximum gain and radiation efficiency within the passband. Near the upper passband edge, there is also a transmission zero located at 36 GHz, which can improve the antenna selectivity and thus improve the utilization of spectrum resources.

[0050] Figure 7 Simulation results for the antenna's maximum gain and radiation efficiency are presented. The figures show that within the passband, the average maximum gain is 3.83 dBi, demonstrating the advantage of high maximum gain. Within the passband, the average radiation efficiency is 96.85%, demonstrating the advantage of high radiation efficiency. At 6 GHz, the maximum gain is only -4.97 dBi, with a radiation efficiency of 19.12%, compared to 1.69 dBi and 93.15% at 9.59 GHz, indicating high selectivity at the lower passband edge. At 36 GHz, the maximum gain is only -4.22 dBi, with a radiation efficiency of 24.27%, compared to 4.02 dBi and 93.68% at 37 GHz, indicating high selectivity at the upper passband edge. The above analysis shows that the antenna not only exhibits high gain and high radiation efficiency within the passband but also high selectivity at both the upper and lower passband edges.

[0051] The radiation pattern of the ultra-wideband antenna based on the above optimized parameters is as follows: Figure 8-10 As shown, Figure 8 This is the radiation pattern of an ultra-wideband antenna at 10.0 GHz. Figure 9 This is the radiation pattern of an ultra-wideband antenna at 20.0 GHz. Figure 10 This is the radiation pattern of an ultra-wideband antenna at 30.0 GHz, derived from... Figure 8-10 It is easy to see that this ultra-wideband antenna is an omnidirectional antenna.

[0052] In this embodiment of the invention, a dielectric layer 10, a radiation layer 20, and a recessed stratum 30 are provided. The dielectric layer 10 has a first surface 10a and a second surface 10b opposite to the first surface 10a. The radiating layer 20 is disposed on the first surface 10a and includes a radiating patch 201 and a feed line 202 connected to the radiating patch 201. The radiating layer 20 has two first slots 201a, which are parallel to each other along the width direction of the feed line 202 and located at the connection between the radiating patch 201 and the feed line 202. The two first slots 201a introduce transmission nulls. The recessed ground layer 30 is disposed on the second surface 10b and is coupled to the radiating layer 20. With this configuration, the two first slots 201a can introduce transmission nulls through electromagnetic coupling, phase difference, and mode conversion. By introducing transmission nulls, radiation in certain directions can be suppressed at specific frequencies, thereby improving the antenna's selectivity at these frequencies and further improving the antenna's directional selectivity to meet the requirements of modern wireless communication terminals.

[0053] This utility model also provides an embodiment of a communication terminal, which includes the ultra-wideband antenna 1000 as described above. The function and structure of the ultra-wideband antenna 1000 can be referred to the above embodiment, and will not be repeated here.

[0054] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An ultra-wideband antenna, characterized in that, include: A dielectric layer is provided with a first surface and a second surface disposed opposite to the first surface; A radiating layer is disposed on the first surface. The radiating layer includes a radiating patch and a feed line connected to the radiating patch. Two first gaps are disposed on the radiating layer. The two first gaps are arranged parallel to each other along the width direction of the feed line. The two first gaps are located at the connection between the radiating patch and the feed line, and the two first gaps introduce a transmission zero point. A recessed stratum is disposed on the second surface, and the recessed stratum is coupled to the radiation layer.

2. The ultra-wideband antenna according to claim 1, characterized in that, Along the length direction of the feed line, the two first gaps are of equal length.

3. The ultra-wideband antenna according to claim 2, characterized in that, Along the width direction of the feed line, the widths of the two first gaps are equal.

4. The ultra-wideband antenna according to claim 2, characterized in that, Along the width direction of the feed line, the two first gaps, the feed line, the radiating patch, and the recessed stratum are all symmetrically arranged with respect to the centerline of the dielectric layer.

5. The ultra-wideband antenna according to claim 2, characterized in that, The frequency f corresponding to the transmission zero point Z The following conditions must be met with the first gap: Where, ε r Let L be the dielectric constant of the medium, c be the speed of light in a vacuum, and L be the dielectric constant of the medium. I The length of the first gap.

6. The ultra-wideband antenna according to claim 1, characterized in that, The radiating patch is trapezoidal, and a second gap is provided on the radiating patch. Along the width direction of the feed line, the second gap is symmetrically arranged with respect to the center line of the radiating patch.

7. The ultra-wideband antenna according to claim 1, characterized in that, The second gap is a square gap.

8. The ultra-wideband antenna according to claim 1, characterized in that, The depressed stratum includes a first rectangular patch, a second rectangular patch, and a third rectangular patch. The second rectangular patch connects the first rectangular patch and the third rectangular patch, and is located between the first rectangular patch and the third rectangular patch.

9. The ultra-wideband antenna according to claim 1, characterized in that, The first rectangular patch and the third rectangular patch are symmetrical with respect to the second rectangular patch.

10. A communication terminal, characterized in that, Includes the ultra-wideband antenna as described in any one of claims 1-9.

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