Antenna and communication equipment

Abstract

The embodiment of the utility model relates to the technical field of communication, and particularly discloses an antenna, which comprises a dielectric layer, a radiation layer and a radio frequency ground layer, and is characterized in that the dielectric layer comprises a first surface and a second surface which are oppositely arranged; the radiation layer is arranged on the first surface, the radiation layer comprises a radiator, a microstrip feeder line and a first microstrip resonance unit, the microstrip feeder line is arranged in the first direction, the radiator is connected to one end of the microstrip feeder line, the radiator and the first microstrip resonance unit are sequentially arranged in the first direction, the first microstrip resonance unit comprises a first straight line segment and a second straight line segment, and the second straight line segment is connected to the first straight line segment. The first linear segments are arranged on one side of the microstrip feeder at intervals, the first linear segments are arranged in the first direction, the second linear segments are arranged at the ends, away from the radiator, of the first linear segments, and the second linear segments extend away from the microstrip feeder; the radio frequency ground layer is arranged on the second surface, and the radio frequency ground layer is coupled with the radiation layer. Through the above mode, the embodiment of the utility model can suppress in-band interference.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of communication technology, and in particular to an antenna and a communication device. Background Art

[0002] Planar broadband antennas have attracted extensive 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, low profile, and easy integration with other components.

[0003] In the process of realizing the present invention, the inventors found that current planar broadband antennas often do not have in-band notches and have the defect of being unable to effectively suppress in-band interference, which greatly limits their use in modern wireless communication terminals. Utility Model Content

[0004] The main technical problem solved by the embodiments of the present utility model is to provide a method for suppressing in-band interference.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: providing an antenna, the antenna includes a dielectric layer, a radiating layer and a radio frequency ground layer, the dielectric layer includes a first surface and a second surface arranged opposite to each other; the radiating layer is arranged on the first surface, the radiating layer includes a radiator, a microstrip feeder and a first microstrip resonant unit, the microstrip feeder is arranged along a first direction, the radiator is connected to one end of the microstrip feeder, the radiator and the first microstrip resonant unit are arranged in sequence along the first direction, the first microstrip resonant unit includes a first straight line segment and a second straight line segment, the first straight line segment is arranged at intervals on one side of the microstrip feeder, the first straight line segment is arranged along the first direction, the second straight line segment is arranged at one end of the first straight line segment away from the radiator, and the second straight line segment extends away from the microstrip feeder; the radio frequency ground layer is arranged on the second surface, and the radio frequency ground layer is coupled with the radiating layer.

[0006] Optionally, the second straight line segment is arranged perpendicular to the first direction.

[0007] Optionally, one end of the first microstrip resonant unit is set to be open-circuited, and the other end of the first microstrip resonant unit is set to be short-circuited.

[0008] Optionally, the radiation layer also includes a second microstrip resonant unit, the radiator and the second microstrip resonant unit are arranged in sequence along the first direction, the second microstrip resonant unit includes a third straight line segment and a fourth straight line segment, the third straight line segment is arranged at intervals on the side of the microstrip feeder away from the first straight line segment, the third straight line segment is arranged along the first direction, the fourth straight line segment is arranged at the end of the third straight line segment away from the radiator, and the fourth straight line segment extends away from the microstrip feeder.

[0009] Optionally, the fourth straight line segment is arranged perpendicular to the first direction.

[0010] Optionally, both ends of the second microstrip resonant unit are set to be open circuits.

[0011] Optionally, the radio frequency layer is provided at an end of the second surface away from the radiator, and an end of the radio frequency layer close to the radiator is recessed inward to form an opening.

[0012] Optionally, the radiator includes a first radiation patch, a second radiation patch and a third radiation patch connected in sequence perpendicular to the first direction, the second radiation patch is set to be a rectangle, the second radiation patch is set to have a rectangular gap, and the outer edges of the first radiation patch and the third radiation patch are elliptical arcs.

[0013] Optionally, the first radiation patch and the third radiation patch are both configured as semi-ellipses, and edges of the first radiation patch and the third radiation patch for connecting with the second radiation patch are both long axes of the semi-ellipses.

[0014] In order to solve the above technical problems, another technical solution adopted by the present invention is: to provide a communication device, including the antenna as described in any one of the above embodiments.

[0015] The beneficial effects of the embodiments of the present invention are as follows: Different from the prior art, the embodiments of the present invention provide an antenna comprising a dielectric layer, a radiating layer, and a radio frequency ground layer, wherein the dielectric layer comprises a first surface and a second surface arranged opposite to each other; the radiating layer is arranged on the first surface, the radiating layer comprises a radiator, a microstrip feeder, and a first microstrip resonant unit, the microstrip feeder is arranged along a first direction, the radiator is connected to one end of the microstrip feeder, the radiator and the first microstrip resonant unit are arranged in sequence along the first direction, the first microstrip resonant unit comprises a first straight segment and a second straight segment, the first straight segment is arranged at intervals on one side of the microstrip feeder, the first straight segment is arranged along the first direction, the second straight segment is arranged at one end of the first straight segment away from the radiator, and the second straight segment extends away from the microstrip feeder; the radio frequency ground layer is arranged on the second surface, and the radio frequency ground layer is coupled to the radiating layer. The embodiments of the present invention can introduce a notch within a specific frequency, so that it has the characteristics of an in-band notch, effectively suppressing its in-band interference within this frequency band, improving signal quality, expanding signal coverage, and improving compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0017] Figure 1 is an exploded view of an antenna according to an embodiment of the present invention;

[0018] Figure 2This is a front view of the antenna of the present invention;

[0019] Figure 3 It is a rear view of the antenna of the present invention;

[0020] Figure 4 It is a parameter diagram of the main viewing direction of the antenna of the present invention;

[0021] Figure 5 It is a parameter diagram of the rear-view direction of the antenna of the present invention;

[0022] Figure 6 This is a simulation result diagram of the standing wave ratio of the antenna of the present invention;

[0023] Figure 7 1 is a diagram showing the maximum gain and radiation efficiency simulation results of the antenna of the present invention;

[0024] Figure 8 It is the radiation pattern of the antenna of the present invention at 10.0 GHz;

[0025] Figure 9 This is the radiation pattern of the antenna of the present invention at 30.0 GHz.

[0026] Description of reference numerals:

[0027] 1. RF formation; 11. opening;

[0028] 2. dielectric layer; 21. first surface; 12. second surface;

[0029] 3. Radiating layer; 31. Radiator; 311. First radiating patch; 312. First radiating patch; 313. First radiating patch; 314. Rectangular gap; 32. Microstrip feed line; 33. First microstrip resonant unit; 331. First straight line segment; 332. Second straight line segment; 34. Second microstrip resonant unit; 341. Third straight line segment; 342. Fourth straight line segment. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying 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 there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. All publications, patent applications, patents, and other references mentioned herein are incorporated by reference in their entirety.

[0032] Referring to Figure 1 , the antenna comprises a dielectric layer 2, a radiation layer 3 and a radio frequency ground layer 1, the radiation layer 3 and the radio frequency ground layer 1 are oppositely arranged on two sides of the dielectric layer 2, and the radio frequency ground layer 1 is coupled with the radiation layer 3.

[0033] For the above-mentioned dielectric layer 2, please refer to Figure 2 and Figure 3 , the dielectric layer 2 comprises a first surface 21 and a second surface 12 arranged oppositely.

[0034] For the above-mentioned radiation layer 3, please refer to Figure 1 and Figure 2 , the radiation layer 3 is arranged on the first surface 21. The radiation layer 3 comprises a first microstrip resonant unit 33, a second microstrip resonant unit 34, a radiator 31 and a 50-ohm microstrip feed line 32. The microstrip feed line 32 is arranged along a first direction, the radiator 31 is connected to one end of the microstrip feed line 32, and the other end of the microstrip feed line 32 is flush with the edge of the dielectric layer 2. The first direction is the length direction of the dielectric layer 2, and is directed from the radiator 31 to the microstrip feed line 32. The radiator 31 and the first microstrip resonant unit 33 are arranged along the first direction in sequence and at intervals, the first microstrip resonant unit 33 comprises a first straight line segment 331 and a second straight line segment 332, the first straight line segment 331 is arranged at one side of the microstrip feed line 32 at intervals, and the first straight line segment 331 is arranged along the first direction. The second straight line segment 332 is arranged at one end of the first straight line segment 331 away from the radiator 31, and the second straight line segment 332 extends away from the microstrip feed line 32. Optionally, the second straight line segment 332 is arranged perpendicular to the first direction. One end of the first microstrip resonant unit 33 is arranged as an open circuit, and the other end of the first microstrip resonant unit 33 is arranged as a short circuit. The radiator 31 and the second microstrip resonant unit 34 are arranged along the first direction in sequence and at intervals, the second microstrip resonant unit 34 comprises a third straight line segment 341 and a fourth straight line segment 342, the third straight line segment 341 is arranged at one side of the microstrip feed line 32 away from the first straight line segment 331 at intervals, and the third straight line segment 341 is arranged along the first direction. The fourth straight line segment 342 is arranged at one end of the third straight line segment 341 away from the radiator 31, and the fourth straight line segment 342 extends away from the microstrip feed line 32. Optionally, the fourth straight line segment 342 is arranged perpendicular to the first direction. Both ends of the second microstrip resonant unit are arranged as open circuits.

[0035] For the RF Stratum 1 above, see Figure 1 and Figure 2 The radiator 31 includes a first radiating patch 311, a second radiating patch 312, and a third radiating patch 313, which are sequentially connected along a direction perpendicular to the first direction. The second radiating patch 312 is configured as a rectangle and is provided with a rectangular slit 314, which is located at the center of the second radiating patch 312. Two sides of the rectangular slit 314 are arranged parallel to the first direction, and the other two sides of the rectangular slit 314 are arranged perpendicular to the first direction. The outer edges of the first radiating patch 311 and the third radiating patch 313 are elliptical arcs. Optionally, the first radiating patch 311 and the third radiating patch 313 are both configured as semi-ellipses, and the edges of the first radiating patch 311 and the third radiating patch 313 that connect to the second radiating patch 312 are the major axes of the semi-ellipses.

[0036] It should be noted that the position of the in-band notch and the isolation at the notch center frequency are determined by the size parameters of the first microstrip resonant unit 33 , and the high selectivity of the upper passband edge is achieved by adding the second microstrip resonant unit 34 .

[0037] In some embodiments, the dielectric layer 2 is a symmetrical pattern, and the central axis of the dielectric layer 2 is parallel to the first direction. Optionally, the radiator 31 and the microstrip feed line 32 are both symmetrical patterns, and the central axis of the radiator 31 and the central axis of the microstrip feed line 32 coincide with the central axis of the dielectric layer 2.

[0038] For the RF Stratum 1 above, see Figure 1 and Figure 3 Along the first direction, the RF ground layer 1 is disposed on a side away from the radiator 31. The side of the RF ground layer 1 away from the radiator 31 is flush with the edge of the dielectric layer 2. The edge of the RF ground layer 1 on the side close to the radiator 31 is disposed perpendicular to the first direction. The center of the side of the RF ground layer 1 close to the radiator 31 is recessed inward to form an opening 11. The edges of the RF ground layer 1 on both sides of the opening 11 are disposed parallel to the first direction, and the edge of the RF ground layer 1 on the bottom side of the opening 11 is disposed perpendicular to the first direction. Along the direction perpendicular to the first direction, both sides of the RF ground layer 1 are flush with the edges of the dielectric layer 2.

[0039] In some embodiments, the radio frequency layer 1 is arranged in a symmetrical pattern, and the central axis of the radio frequency layer 1 is parallel to the central axis of the dielectric layer 2 .

[0040] It should be noted that the radiation performance and bandwidth of the antenna are mainly determined by the size parameters of the radiator 31 and the size parameters of the radio frequency formation 1 .

[0041] In order to verify the concept of the antenna of the embodiment of the utility model, the simulation example is as follows:

[0042] See also Figure 4 and Figure 5 , shows the layout size parameter description of the simulation example, where the dielectric constant of the dielectric layer 2 is 3.38, the dielectric loss is 0.0022, and the thickness is 0.2mm; the metal layer is copper-plated with a thickness of 0.035mm.

[0043] The in-band notch is achieved by adding the first microstrip resonant unit 33 to introduce a transmission zero point. The frequency corresponding to the transmission zero point, i.e., the in-band notch center frequency, has a relationship with the size parameters of the first microstrip resonant unit 33 as follows:

[0044]

[0045]

[0046] Among them, ε r is the dielectric constant of the medium, and c is the speed of light in a vacuum.

[0047] The high selectivity of the upper passband edge is achieved by introducing a transmission zero point by adding a second microstrip resonant unit 34. The relationship between the frequency corresponding to the transmission zero point and the size parameter of the second microstrip resonant unit 34 is:

[0048]

[0049] Based on the above, the size parameters of the dielectric layer 2, the radiation layer 3 and the radio frequency layer 1 are optimized, and the parameters are as follows: L A =11mm,W A =11.0mm,L GM =3.8mm,L GRL =5.0mm,W GM =8.4mm,L P =6.5mm,W P =4.5mm,L T =1.3mm,L R1 =2.05mm,L R2 =1.0mm,L L1 =2.1mm,L L2 =0.3mm,W R =W L =0.1mm,S R =S L =0.1mm,L F =4.0mm,W F =0.4mm.

[0050] See also Figure 6 , the figure shows the standing wave ratio of the broadband planar antenna after parameter optimization. Figure 6It can be seen that the impedance bandwidth with a standing wave ratio less than 2 ranges from 9.5 to 32.1 GHz, with a center frequency of 20.8 GHz, an absolute bandwidth of 22.6 GHz, and a relative bandwidth of 108.7%, showing broadband characteristics; within the passband, there are three transmission poles, located at 13.5 GHz, 24.7 GHz, and 31.6 GHz, respectively, which ensure the maximum gain and flatness of the radiation efficiency within the passband; there is also a transmission zero point in the passband to form a notch, located at 20 GHz, which can effectively suppress the in-band notch; there is also a transmission zero point near the upper passband edge, located at 33 GHz, which can improve the selectivity of the antenna and thereby improve the utilization of spectrum resources.

[0051] Figure 7 The figure shows the simulation results of the maximum gain and radiation efficiency of the antenna. Figure 7 It can be seen that within the passband, its average maximum gain is 3.74dBi, showing the advantage of high maximum gain; within the passband, its average radiation efficiency is 95.6%, showing the advantage of high radiation efficiency; at the center frequency of the notch, its maximum gain is only -8.18dBi, and the radiation efficiency is 23.92%. Compared with the average maximum gain and average radiation efficiency within the passband, it can be seen that it has high isolation at the center frequency of the notch; at 6GHz, its maximum gain is only -4.43dBi, and the radiation efficiency is 20.4%, compared with the maximum gain of 2.41dBi and the radiation efficiency of 92.9% at 9.5GHz, it can be seen that it has high selectivity at the lower passband edge; at 33GHz, its maximum gain is only -4.16dBi, and the radiation efficiency is 32.7%, compared with the maximum gain of 4.14dBi and the radiation efficiency of 90.4% at 32.1GHz, it can be seen that it has high selectivity at the upper passband edge. From the above analysis, it can be seen that the antenna not only has high gain and high radiation efficiency within the passband, but also has high isolation at the notch center frequency and high selectivity at the upper and lower passband edges.

[0052] Figure 8 and Figure 9 The radiation patterns of the antenna at 10.0 GHz and 30 GHz are shown. Figure 8 and Figure 9 It can be seen that the antenna is an omnidirectional antenna.

[0053] In an embodiment of the present utility model, the antenna includes a dielectric layer 2, a radiating layer 3 and a radio frequency layer 1. The dielectric layer 2 includes a first surface 21 and a second surface 12 arranged opposite to each other. The radiating layer 3 is arranged on the first surface 21. The radiating layer 3 includes a radiator 31, a microstrip feeder 32 and a first microstrip resonant unit 33. The microstrip feeder 32 is arranged along a first direction. The radiator 31 is connected to one end of the microstrip feeder 32. The radiator 31 and the first microstrip resonant unit 33 are arranged in sequence along the first direction. The first microstrip resonant unit 33 includes a first straight line segment 331 and a second straight line segment 332. The first straight line segment 331 is arranged at intervals on one side of the microstrip feeder 32. The first straight line segment 331 is arranged along the first direction. The second straight line segment 332 is arranged at an end of the first straight line segment 331 away from the radiator 31. The second straight line segment 332 extends away from the microstrip feeder 32. The radio frequency layer 1 is arranged on the second surface 12. The radio frequency layer 1 is coupled to the radiating layer 3. The embodiment of the utility model can introduce a notch within a specific frequency, so that it has the characteristics of an in-band notch, effectively suppressing its in-band interference within this frequency band, improving signal quality, expanding signal coverage and improving compatibility.

[0054] The present invention provides an embodiment of a communication device, wherein the motion system includes the above-mentioned antenna. The structure and function of the antenna can be referred to the above-mentioned embodiment, which will not be described in detail here.

[0055] It should be noted that the preferred embodiments of the present invention are given in the specification and drawings 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 do not serve as additional limitations on the content of the present invention. The purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all considered to be within the scope of the description of the present invention; further, it is obvious to those skilled in the art that improvements or changes can be made based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. An antenna, characterized in that: include: The dielectric layer includes a first surface and a second surface disposed opposite to each other; A radiation layer is provided on the first surface, the radiation layer including a radiator, a microstrip feeder and a first microstrip resonant unit, the microstrip feeder is arranged along a first direction, the radiator is connected to one end of the microstrip feeder, the radiator and the first microstrip resonant unit are arranged in sequence along the first direction, the first microstrip resonant unit includes a first straight line segment and a second straight line segment, the first straight line segment is arranged at an interval on one side of the microstrip feeder, the first straight line segment is arranged along the first direction, the second straight line segment is arranged at an end of the first straight line segment away from the radiator, and the second straight line segment extends away from the microstrip feeder; A radio frequency layer is provided on the second surface, and the radio frequency layer is coupled with the radiation layer.

2. The antenna according to claim 1, wherein The second straight line segment is arranged perpendicular to the first direction.

3. The antenna according to claim 1, wherein One end of the first microstrip resonant unit is set to be open circuit, and the other end of the first microstrip resonant unit is set to be short circuit.

4. The antenna according to claim 1, wherein The radiation layer also includes a second microstrip resonant unit, the radiator and the second microstrip resonant unit are arranged in sequence along the first direction, the second microstrip resonant unit includes a third straight line segment and a fourth straight line segment, the third straight line segment is arranged at intervals on a side of the microstrip feeder away from the first straight line segment, the third straight line segment is arranged along the first direction, the fourth straight line segment is arranged at an end of the third straight line segment away from the radiator, and the fourth straight line segment extends away from the microstrip feeder.

5. The antenna according to claim 4, characterized in that The fourth straight line segment is arranged perpendicular to the first direction.

6. The antenna according to claim 4, wherein: Both ends of the second microstrip resonant unit are set to be open circuit.

7. The antenna according to claim 1, wherein The radio frequency layer is arranged at an end of the second surface away from the radiator, and an end of the radio frequency layer close to the radiator is recessed inward to form an opening.

8. The antenna according to any one of claims 1 to 7, characterized in that: The radiator includes a first radiation patch, a second radiation patch and a third radiation patch connected in sequence perpendicular to the first direction, the second radiation patch is set to a rectangle, the second radiation patch is provided with a rectangular gap, and the outer edges of the first radiation patch and the third radiation patch are elliptical arcs.

9. The antenna according to claim 8, characterized in that The first radiation patch and the third radiation patch are both configured as semi-ellipses, and edges of the first radiation patch and the third radiation patch for connecting with the second radiation patch are both long axes of the semi-ellipses.

10. A communication device, characterized in that: Comprising the antenna according to any one of claims 1 to 9.

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