Antenna and communication equipment

Abstract

The utility model relates to the technical field of communication equipment, in particular to an antenna, which comprises a dielectric layer, a radiation layer and a radio frequency ground layer, the dielectric layer is provided with a first surface and a second surface which are oppositely arranged, the radiation layer is arranged on the first surface and comprises a radiator, a microstrip feeder, a first open-circuit branch knot and a second open-circuit branch knot, the radiator is connected to the microstrip feeder line, the microstrip feeder line, the first open-circuit branch knot and the second open-circuit branch knot are sequentially arranged at intervals, and the radio frequency ground layer is arranged on the second surface. Through the simulation experiment, the antenna has the advantage of high selectivity, and spectrum resources can be efficiently utilized.

Description

Technical Field

[0001] The utility model relates to the technical field of communication equipment, in particular to an antenna and a communication equipment. Background Art

[0002] Planar broadband antennas have the characteristics of high transmission rate, low cost, light weight and simple design, and are widely used in communication equipment. In the prior art, there is often a defect of low selectivity at the passband edge of planar broadband antennas, and the spectrum resources cannot be efficiently utilized, which greatly limits the application of planar broadband antennas in communication equipment. Summary of the Utility Model

[0003] The utility model provides an antenna, which has the advantage of high selectivity.

[0004] To solve the above technical problems, a technical solution adopted by the utility model is: to provide an antenna, including a dielectric layer with a first surface and a second surface arranged oppositely; a radiation layer arranged on the first surface, the radiation layer includes a radiator, a microstrip feeder, a first open stub and a second open stub, the radiator is connected to the microstrip feeder, and the microstrip feeder, the first open stub and the second open stub are arranged at intervals in sequence; and a radio frequency ground plane arranged on the second surface.

[0005] Optionally, a slot is formed in the radiator.

[0006] Optionally, the slot is square.

[0007] Optionally, the radiator includes a square part, a first semi-elliptical part, a second semi-elliptical part and a third semi-elliptical part, the slot is arranged in the square part, the square part has a first side wall, a second side wall, a third side wall and a fourth side wall connected end to end, the first semi-elliptical part, the second semi-elliptical part and the third semi-elliptical part are respectively arranged on the first side wall, the second side wall and the third side wall, and the microstrip feeder is arranged on the fourth side wall.

[0008] Optionally, along the direction from the second side wall to the fourth side wall, the square part has a center line, and the first semi-elliptical part and the third semi-elliptical part are symmetrical about the center line.

[0009] Optionally, the length of the major axis of the first semi-elliptical part is the same as the length of the first side wall; and / or, the length of the major axis of the second semi-elliptical part is the same as the length of the second side wall; and / or, the length of the major axis of the third semi-elliptical part is the same as the length of the third side wall.

[0010] Optionally, the radio frequency ground plane is symmetrical about the center line.

[0011] Optionally, the first open stub and the second open stub are symmetric about the microstrip feeder.

[0012] Optionally, the first open stub is L-shaped, and / or the second open stub is L-shaped.

[0013] To solve the above technical problems, a technical solution adopted by the present utility model is: to provide a communication device including the above antenna.

[0014] The beneficial effects of the embodiments of the present application are: to provide an antenna, which includes a dielectric layer, a radiation layer, and a radio frequency ground layer. The dielectric layer has a first surface and a second surface arranged opposite to each other. The radiation layer is disposed on the first surface. The radiation layer includes a radiator, a microstrip feeder, a first open stub, and a second open stub. The radiator is connected to the microstrip feeder. The microstrip feeder, the first open stub, and the second open stub are sequentially arranged at intervals. The radio frequency ground layer is disposed on the second surface. Through the above simulation experiments, the antenna has the advantage of high selectivity and can efficiently utilize spectrum resources. Description of the Drawings

[0015] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. Obviously, the following described drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to the drawings.

[0016] Figure 1 is a schematic structural diagram of the antenna provided by the present utility model;

[0017] Figure 2 is an exploded view of the antenna provided by the present utility model;

[0018] Figure 3 is a schematic structural diagram of the radiation layer provided by the present utility model;

[0019] Figure 4 is a schematic structural diagram of the antenna provided by the present utility model in another view;

[0020] Figure 5 is a schematic structural diagram of the antenna provided by the present utility model in yet another view;

[0021] Figure 6 is a standing wave ratio simulation result diagram of the antenna provided by the present utility model;

[0022] Figure 7 is a maximum gain and radiation efficiency simulation result diagram of the antenna provided by the present utility model;

[0023] Figure 8It is the radiation pattern of the antenna provided by the present utility model at 10.0 GHz;

[0024] Figure 9 It is the radiation pattern of the antenna provided by the present utility model at 20.0 GHz;

[0025] Figure 10 It is the radiation pattern of the antenna provided by the present utility model at 30.0 GHz.

[0026] Reference numerals:

[0027] 100, antenna;

[0028] 10, dielectric layer; 10a, first surface; 10b, second surface;

[0029] 20, radiation layer; 21, radiator; 21a, slot; 211, square part; 212, first semi-elliptical part; 213, second semi-elliptical part; 214, third semi-elliptical part; 22, microstrip feeder; 23, first open stub; 231, first stub; 232, second bent stub; 24, first open stub; 241, second stub; 242, second bent stub;

[0030] 30, RF ground plane. Detailed implementation manners

[0031] For the convenience of understanding the present utility model, the present utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are only for the purpose of illustration.

[0032] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in this specification in the description of the present utility model are only for the purpose of describing specific embodiments and are not used to limit the present utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0033] Please refer to Figure 1 - Figure 2 , the antenna 100 includes a dielectric layer 10, a radiation layer 20 and an RF ground plane 30. The dielectric layer 10 has a first surface 10a and a second surface 10b which are oppositely arranged. The radiation layer 20 is disposed on the first surface 10a, and the RF ground plane 30 is disposed on the second surface 10b.

[0034] For the above-mentioned dielectric layer 10, please refer to Figure 2 , the dielectric layer 10 has a square plate-like structure. The radio frequency ground layer 30 projects towards the dielectric layer 10, and the projection of the radio frequency ground layer 30 is within the range of the dielectric layer 10. The radiation layer 20 projects towards the dielectric layer 10, and the projection of the radiation layer 20 is within the range of the dielectric layer 10. The dielectric layer 10 has a central axis p1 along the first direction x, and both the radiation layer 20 and the radio frequency ground layer 30 are symmetric about the central axis p1. Among them, the first direction x is parallel to both the first surface 10a and the second surface 10b.

[0035] Optionally, the above-mentioned dielectric layer 10 has a square plate-like structure.

[0036] Optionally, the length of the radio frequency ground layer 30 extending along the second direction y is the same as the length of the dielectric layer 10 extending along the second direction y.

[0037] For the above-mentioned radiation layer 20, please refer to Figure 3 , the radiation layer 20 includes a radiator 21, a microstrip feeder 22, a first open stub 23, and a second open stub 24. The radiator 21 is connected to the microstrip feeder 22, and the radiator 21 and the microstrip feeder 22 are arranged along the first direction x. The microstrip feeder 22, the first open stub 23, and the second open stub 24 are sequentially spaced along the second direction y. Among them, the first direction x is parallel to the second direction y.

[0038] Please refer to Figure 2 - Figure 3 , the above-mentioned radiator 21 is symmetrically arranged about the central axis p1 of the dielectric layer 10. The radiator 21 is provided with a slit 21a, the slit 21a penetrates through the radiator 21, the slit 21a is square, and in addition, the slit 21a is symmetrically arranged about the central axis p1 of the dielectric layer 10.

[0039] Optionally, the shape of the slit 21a is square.

[0040] For the above-mentioned radiator 21, please refer to Figure 2 - Figure 3, the radiator 21 includes a square portion 211, a first semi-elliptical portion 212, a second semi-elliptical portion 213, and a third semi-elliptical portion 214. The first semi-elliptical portion 212, the second semi-elliptical portion 213, and the third semi-elliptical portion 214 are all in a semi-elliptical structure and each has a major axis and a minor axis. The slot 21a is provided in the square portion 211. The square portion 211 has a first side wall, a second side wall, a third side wall, and a fourth side wall connected end to end. The first semi-elliptical portion 212, the second semi-elliptical portion 213, and the third semi-elliptical portion 214 are respectively provided on the first side wall, the second side wall, and the third side wall. The microstrip feeder 22 is provided on the fourth side wall. Along the direction from the second side wall towards the fourth side wall, the square portion 211 has a center line p2, and the first semi-elliptical portion 212 and the third semi-elliptical portion 214 are symmetric about the center line p2. In this embodiment, the center line p2 is parallel to the central axis p1 of the dielectric layer 10.

[0041] In some embodiments, the length of the major axis of the first semi-elliptical portion 212 is the same as the length of the first side wall, and the length of the major axis of the first semi-elliptical portion 212 is the same as the length of the first side wall extending in the first direction; and / or, the length of the major axis of the second semi-elliptical portion 213 is the same as the length of the second side wall, and the length of the major axis of the second semi-elliptical portion 213 is the same as the length of the second side wall extending in the second direction; and / or, the length of the major axis of the third semi-elliptical portion 214 is the same as the length of the third side wall, and the length of the major axis of the third semi-elliptical portion 214 is the same as the length of the third side wall extending in the first direction. Wherein, the length directions of the first side wall and the third side wall are parallel to the first direction x, and the length direction of the second side wall is parallel to the length direction of the fourth side wall.

[0042] In some embodiments, the impedance of the above microstrip feeder 22 is 50 ohms.

[0043] In some embodiments, the first open stub 23 and the second open stub 24 are symmetric about the microstrip feeder 22.

[0044] In some embodiments, the first open stub 23 is L-shaped, and / or the second open stub 24 is L-shaped. Specifically, the first open stub 23 includes a first stub 231 and a first bent stub 232, the first stub 231 is connected to the first bent stub 232, the second open stub 24 includes a second stub 241 and a second bent stub 242, the second stub 241 is connected to the second bent stub 242, the first stub 231, the microstrip feeder 22, and the second stub 241 are sequentially arranged at intervals, the first bent stub 232 and the second bent stub 242 are arranged in opposite directions, and the center lines p2 of the first stub 231 and the first bent stub 232, and the second stub 241 and the second bent stub 242 are symmetric. In addition, the high selectivity at the passband edge of the antenna 100 is achieved by adding the L-shaped first open stub 23 and the L-shaped second open stub 24, thereby introducing a transmission zero.

[0045] To verify the concept of the antenna 100 in the embodiments of the present invention, the following simulation experiments are carried out:

[0046] A circuit board is provided. The circuit board is the above-mentioned dielectric layer 10. The dielectric constant of the dielectric layer 10 is 3.38, the dielectric loss is 0.0022, and the thickness is 0.2 mm; the metal layer is copper plating with a thickness of 0.035 mm. Among them, the thickness of the dielectric layer 10 is the length of the dielectric layer 10 extending along the third direction z. The first direction x, the second direction y, and the third direction z are perpendicular to each other in pairs.

[0047] Please refer to Figure 4 - Figure 5 , the above-mentioned dielectric layer 10, radiation layer 20, and RF ground layer 30 satisfy: L A = 11.0 mm, W A = 10.8 mm, L G = 3.3 mm, L P = 6.5 mm, W P = 4.5 mm, L VT = 1.3 mm, L HT = 0.8 mm, L1 = 2.17 mm, L2 = 0.9 mm, W2 = 0.1 mm, S = 0.1 mm, L S = 2.0 mm, L F = 3.5 mm, W F = 0.4 mm. Among them, L A is the length of the circuit board extending along the first direction x, W A is the length of the circuit board extending along the second direction y and the length of the RF ground layer 30 extending along the second direction y, L G is the length of the RF ground layer 30 extending along the first direction x, L P is the major axis length of the first semi-elliptical portion 212 and the third semi-elliptical portion 214, W Pis the major axis length of the second semi-elliptical portion 213, L HT is the minor axis semi-length of the first semi-elliptical portion 212 and the third semi-elliptical portion 214, L VT is the minor axis semi-length of the second semi-elliptical portion 213, L S is the side length of the slit 21a, L1 is the length that the first stub 231 and the second stub 241 extend along the first direction x, L2 is the length that the first bent stub 232 and the second bent stub 242 extend along the second direction y, the lengths that the W1-type first stub 231 and the second stub 241 extend along the second direction y, and the lengths that the first bent stub 232 and the second bent stub 242 extend along the first direction x, L F is the length that the microstrip feeder 22 extends along the first direction x, W F is the length that the microstrip feeder 22 extends along the second direction y.

[0048] The relationship between the frequency corresponding to the transmission zero with high selectivity at the passband edge on the antenna 100 and the dimensional parameters of the first open stub 23 and the second open stub 24 is as follows:

[0049]

[0050] where, ε r is the dielectric constant of the medium, and c is the speed of the wave propagating in vacuum.

[0051] The simulation results of the antenna 100 of the present utility model are as Figure 6 shown. The bandwidth range with a voltage standing wave ratio less than 2 is from 9.2 to 31.4 GHz, the center frequency is 20.3 GHz, the absolute bandwidth is 22.2 GHz, and the relative bandwidth is 109.4%, showing broadband characteristics; within the passband, there are also three transmission poles, located at 11.2 GHz, 23.9 GHz, and 30.1 GHz respectively, ensuring the flatness of the maximum gain and radiation efficiency within the passband; there is also a transmission zero at 33 GHz near the upper passband edge, which can improve the selectivity of the antenna 100.

[0052] The simulation diagrams of the maximum gain and radiation efficiency of the antenna 100 of the present utility model are as Figure 7As shown, it can be seen from the figure that within the passband of the antenna 100, the average maximum gain is 4.09 dBi, showing the advantage of high maximum gain; within the passband of the antenna 100, its average radiation efficiency is 96.3%, showing the advantage of high radiation efficiency. In addition, at 6 GHz, its maximum gain is only -4.08 dBi and the radiation efficiency is 19.37%. Comparing with the maximum gain of 2.2 dBi and the radiation efficiency of 90.7% at 9.2 GHz, it can be seen that it has high selectivity at the lower passband edge; at 33 GHz, its maximum gain is only -3.76 dBi and the radiation efficiency is 24.9%. Comparing with the maximum gain of 4.02 dBi and the radiation efficiency of 94.63% at 31.4 GHz, it can be seen that it has high selectivity at the upper passband edge.

[0053] By simulating the frequencies of the antenna at 10.0 GHz, 20.0 GHz, and 30.0 GHz respectively, it is obtained that at Figure 8 - Figure 10 the radiation pattern, from Figure 8 - Figure 10 it can be seen that the above-mentioned antenna 100 is an omnidirectional antenna 100.

[0054] In an embodiment of the present application, an antenna 100 is provided. The antenna 100 includes a dielectric layer 10, a radiation layer 20, and a radio frequency ground layer 30. The dielectric layer 10 has a first surface 10a and a second surface 10b arranged oppositely. The radiation layer 20 is disposed on the first surface 10a. The radiation layer 20 includes a radiator 21, a microstrip feeder 22, a first open stub 23, and a second open stub 24. The radiator 21 is connected to the microstrip feeder 22. The microstrip feeder 22, the first open stub 23, and the second open stub 24 are arranged at intervals in sequence. The radio frequency ground layer 30 is disposed on the second surface 10b. Through the above simulation experiments, the antenna 100 has the advantage of high selectivity, can efficiently utilize spectrum resources, and the antenna 100 is planar broadband.

[0055] The present utility model also provides an embodiment of a communication device. The communication device includes the above-mentioned antenna 100. For the specific structure and function of the antenna 100, reference can be made to the above embodiment, and details will not be repeated here.

[0056] It should be noted that the description and drawings of the present utility model give preferred embodiments of the present utility model. However, the present utility model 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 to the content of the present utility model. The purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Moreover, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, all of which are regarded as within the scope described in the description of the present utility model; further, for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

Claims

1. An antenna, characterized in that, Comprising: A dielectric layer having a first surface and a second surface disposed opposite to each other; A radiation layer disposed on the first surface, the radiation layer including a radiator, a microstrip feeder, a first open stub, and a second open stub, the radiator being connected to the microstrip feeder, and the microstrip feeder, the first open stub, and the second open stub being sequentially arranged at intervals; A radio frequency ground layer disposed on the second surface.

2. The antenna according to claim 1, wherein The radiator is provided with a slot.

3. The antenna according to claim 2, wherein The slot is square.

4. The antenna according to claim 2, wherein The radiator includes a square portion, a first semi-elliptical portion, a second semi-elliptical portion, and a third semi-elliptical portion, the slot is disposed in the square portion, the square portion has a first side wall, a second side wall, a third side wall, and a fourth side wall connected end to end, the first semi-elliptical portion, the second semi-elliptical portion, and the third semi-elliptical portion are respectively disposed on the first side wall, the second side wall, and the third side wall, and the microstrip feeder is disposed on the fourth side wall.

5. The antenna according to claim 4, wherein Along the direction from the second side wall to the fourth side wall, the square portion has a center line, and the first semi-elliptical portion and the third semi-elliptical portion are symmetric about the center line.

6. The antenna according to claim 4, wherein The length of the major axis of the first semi-elliptical portion is the same as the length of the first side wall; and / or, the length of the major axis of the second semi-elliptical portion is the same as the length of the second side wall; and / or, the length of the major axis of the third semi-elliptical portion is the same as the length of the third side wall.

7. The antenna according to claim 5, wherein The radio frequency ground layer is symmetric about the center line.

8. The antenna according to any one of claims 1-7, wherein The first open stub and the second open stub are symmetric about the microstrip feeder.

9. The antenna according to any one of claims 1-7, wherein The first open stub is L-shaped, and / or the second open stub is L-shaped.

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

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