Antenna and terminal

Abstract

The utility model discloses an antenna and a terminal. A feed unit comprises a first circuit board and a feed circuit printed on the first circuit board. The second circuit board is provided with a first surface and a second surface which are oppositely arranged; the resonance arms are printed on the first surface, each resonance arm is connected with a first coupling microstrip line and a grounding point, the first coupling microstrip lines are printed on the first surface, and the grounding points penetrate through the first surface and the second surface so as to be electrically connected with the grounding end of the first circuit board; the grounding resonance branches are printed on the first surface, each grounding resonance branch and one resonance arm are arranged at an interval to form a gap, and the grounding resonance branches and the resonance arms are mutually coupled through the gaps; a second coupling microstrip line is printed on the second face, the second coupling microstrip line is in coupling connection with the first coupling microstrip line, and the second coupling microstrip line is connected with a feed welding point used for being electrically connected with a feed circuit on the first circuit board. According to the technical scheme, the resonance bandwidth of the antenna can be effectively increased, so that the broadband requirement of the mobile satellite communication antenna is met.

Description

Technical Field

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

[0002] With the advent of the information age, satellite communication systems, navigation systems, positioning systems and related applications are developing towards large capacity, multi-function, multi-band, ultra-wideband and miniaturization. The antennas in mobile satellite communications need to have wide beam, wide bandwidth, circular polarization and other characteristics. The antenna has wide beam, excellent wide-angle circular polarization characteristics, hemispherical radiation pattern and other performances, making it one of the commonly used satellite communication antennas.

[0003] The circuit boards of existing antennas are mostly single-sided structures, and their resonant arms are directly connected to the feeding circuit, resulting in a narrow resonant bandwidth of the antenna, which is difficult to meet the broadband requirements of mobile satellite communication antennas. Utility Model Content

[0004] The main purpose of the utility model is to provide an antenna and a terminal, aiming to solve the problem that the existing antenna has a narrow resonance bandwidth.

[0005] To achieve the above object, the utility model provides an antenna, comprising:

[0006] A feeding unit, the feeding unit comprising a first circuit board and a feeding circuit printed on the first circuit board;

[0007] A radiation unit, the radiation unit comprising:

[0008] a second circuit board, the second circuit board having a first surface and a second surface arranged opposite to each other;

[0009] A plurality of resonant arms, the resonant arms are printed on the first surface, each of the resonant arms is connected to a first coupling microstrip line and a grounding point, the first coupling microstrip line is printed on the first surface, and the grounding point passes through the first surface and the second surface to be electrically connected to the grounding end of the first circuit board;

[0010] A plurality of grounded resonance branches, wherein the grounded resonance branches are printed on the first surface, each of the grounded resonance branches is spaced apart from one of the resonance arms to form a gap, and the grounded resonance branches and the resonance arms are coupled to each other through the gap;

[0011] The second surface is printed with a second coupling microstrip line, the second coupling microstrip line is coupled and connected to the first coupling microstrip line, and the second coupling microstrip line is connected to a feeding welding point for electrically connecting to a feeding circuit on the first circuit board.

[0012] In some embodiments, each of the resonant arms includes a first resonant arm and a second resonant arm, the first resonant arm and the second resonant arm are arranged in parallel and spaced apart, and the first resonant arm and the second resonant arm are electrically connected via the first coupling microstrip line.

[0013] In some embodiments, the first resonant arm includes a first straight extension segment and at least one second straight extension segment, and the at least one second straight extension segment is vertically connected to one end of the first straight extension segment;

[0014] The second resonant arm comprises a third straight extension segment and at least one fourth straight extension segment, wherein the at least one fourth straight extension segment is vertically connected to one end of the third straight extension segment;

[0015] The third straight line extension segment is arranged in parallel with the first straight line extension segment and is spaced apart from each other, and the third straight line extension segment is electrically connected to the first straight line extension segment through the first coupling microstrip line.

[0016] In some embodiments, four resonant arms are provided, and the four resonant arms are arranged in parallel with equal intervals.

[0017] In some embodiments, a bracket is further included, and the plurality of resonant arms and grounded resonant branches are respectively spirally wound along the lower end of the bracket toward the upper end of the bracket.

[0018] The utility model also provides a terminal, comprising the antenna as mentioned above.

[0019] The antenna of the utility model can effectively increase the resonance bandwidth of the antenna by setting a second coupling microstrip line to couple the radiation unit and the feeding unit with the first coupling microstrip line, and by the gap coupling effect of the grounded resonance branch and the resonance arm, so as to meet the broadband requirements of the mobile satellite communication antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the first surface of the second circuit board of the utility model;

[0021] Figure 2 It is a schematic diagram of the second surface of the second circuit board of the utility model.

[0022] Description of Figure Numbers:

[0023]

[0024]

[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the scheme in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0029] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0030] Please refer to Figure 1 and Figure 2 The antenna provided in the first embodiment of the utility model includes:

[0031] A feeding unit, the feeding unit comprising a first circuit board and a feeding circuit printed on the first circuit board;

[0032] Radiating unit, the radiating unit comprises:

[0033] The second circuit board 10 has a first surface 11 and a second surface 12 which are arranged opposite to each other.

[0034] A plurality of resonant arms 20, the resonant arms 20 are printed on the first surface 11, each resonant arm 20 is connected to a first coupling microstrip line 21 and a grounding point 22, the first coupling microstrip line 21 is printed on the first surface 11, and the grounding point 22 penetrates the first surface 11 and the second surface 12, so as to be electrically connected to the grounding end of the first circuit board;

[0035] A plurality of grounded resonance branches 23 are printed on the first surface 11, each grounded resonance branch 23 is spaced apart from a resonance arm 20 to form a gap, and the grounded resonance branch 23 and the resonance arm 20 are coupled to each other through the gap, so that the resonance arm 20 and the grounded resonance branch 23 form a coupling capacitance effect, thereby forming a resonance circuit with the resonance arm 20 and the grounded resonance branch 23.

[0036] In this embodiment, the resonant frequency and bandwidth of the antenna can be controlled by adjusting the coupling gap between the resonant arm 20 and the grounded resonant branch 23 .

[0037] Among them, the second surface 12 is printed with a second coupling microstrip line 24, the second coupling microstrip line 24 is coupled and connected to the first coupling microstrip line 21, and the second coupling microstrip line 24 is connected to a feeding welding point 25 for electrically connecting to the feeding circuit on the first circuit board, thereby connecting the radiation unit and the feeding unit.

[0038] In this embodiment, the feeding circuit of the feeding unit indirectly feeds the radiating unit through coupling of the first coupling microstrip line 21 and the second coupling microstrip line 24 , and the radiating unit is combined and connected with the feeding unit 30 to generate a resonant frequency.

[0039] The antenna of the utility model couples the radiation unit and the feeding unit by setting a second coupling microstrip line 24 with the first coupling microstrip line 21, and couples the grounded resonance branch 23 with the gap of the resonance arm 20, thereby expanding the resonance bandwidth of the antenna to a wider frequency band, so as to be suitable for wide-band terminal equipment, meet the good return loss in the whole frequency band, thereby meeting the wide-band requirements of mobile satellite communication antennas and increasing the application range of the antenna.

[0040] In this embodiment, the first circuit board can be a hard circuit board, which is arranged at the bottom of the second circuit board 10 to facilitate the wiring connection between the radiation unit and the feeding unit; the second circuit board 10 can be a flexible circuit board to facilitate the installation of the radiation unit.

[0041] In some embodiments, each resonant arm 20 includes a first resonant arm 221 and a second resonant arm 222 . The first resonant arm 221 and the second resonant arm 222 are arranged in parallel and spaced apart from each other. The first resonant arm 221 and the second resonant arm 222 are electrically connected via a first coupling microstrip line 21 .

[0042] In some embodiments, please refer to Figure 1 The first resonant arm 221 includes a first straight extension segment 223 and at least one second straight extension segment 224, and the at least one second straight extension segment 224 is vertically connected to one end of the first straight extension segment 223;

[0043] The second resonant arm 222 includes a third straight extension segment 225 and at least one fourth straight extension segment 226, and the at least one fourth straight extension segment 226 is vertically connected to one end of the third straight extension segment 225;

[0044] The third straight extension segment 225 is arranged in parallel with the first straight extension segment 223 and is spaced apart from each other. The third straight extension segment 225 is electrically connected to the first straight extension segment 223 via the first coupling microstrip line 21 .

[0045] In this embodiment, the second straight extension segment 224 and the fourth straight extension segment 226 may be one or more and may be specifically configured according to actual conditions to adjust the length of the resonant arm 20 .

[0046] The utility model sets the resonant arm 20 to meander along the surface of the second circuit board 10, so as to ensure that the resonant arm 20 of sufficient length is printed on the limited area of ​​the second circuit board 10, thereby reducing the height and volume of the antenna.

[0047] In some embodiments, four resonant arms 20 are provided, and the four resonant arms 20 are arranged in parallel at equal intervals. That is, the antenna of the utility model is a four-arm antenna, which can form four resonant circuits and generate four different resonant frequencies, and can ensure good performance of the antenna working in various systems and frequency bands.

[0048] Of course, in other embodiments, the number of the resonant arms 20 may also be set to other numbers, such as two, three, etc., so as to form a dual-band or triple-band design, including but not limited to this.

[0049] In some embodiments, the antenna further includes a bracket (not shown), and a plurality of resonant arms 20 and grounded resonant branches are respectively spirally wound along the lower end of the bracket toward the upper end of the bracket. The resonant arms and grounded resonant branches 23 are respectively rotated to the left or right, so that the antenna of the utility model becomes a left-handed antenna or a right-handed antenna.

[0050] Of course, the antenna of the present invention may have the bracket, and after the resonant arm 20 and the grounded resonant branch 23 are spirally wound around the bracket and fixed, the bracket may be removed, thereby reducing the weight of the entire antenna.

[0051] The utility model also provides a terminal, including the above antenna. The terminal includes but is not limited to terminals such as drones and satellite signal receivers. Since the above terminal adopts all the technical solutions of all the embodiments of the above antenna, the terminal of the utility model also has at least all the beneficial effects brought by the technical solutions of the above antenna embodiments, which will not be repeated here one by one.

[0052] In summary, the antenna of the utility model can effectively increase the resonant bandwidth of the antenna by setting a second coupling microstrip line 24 to couple the radiation unit and the feeding unit with the first coupling microstrip line 21, and achieve good return loss in the entire frequency band, thereby meeting the wide-band requirements of mobile satellite communication antennas.

[0053] The above embodiments of the utility model are merely examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the utility model are still within the scope of protection of the utility model.

Claims

1. An antenna, characterized in that: include: A feeding unit, the feeding unit comprising a first circuit board and a feeding circuit printed on the first circuit board; A radiation unit, the radiation unit comprising: a second circuit board, the second circuit board having a first surface and a second surface arranged opposite to each other; A plurality of resonant arms, the resonant arms are printed on the first surface, each of the resonant arms is connected to a first coupling microstrip line and a grounding point, the first coupling microstrip line is printed on the first surface, and the grounding point passes through the first surface and the second surface to be electrically connected to the grounding end of the first circuit board; A plurality of grounded resonance branches, wherein the grounded resonance branches are printed on the first surface, each of the grounded resonance branches is spaced apart from one of the resonance arms to form a gap, and the grounded resonance branches and the resonance arms are coupled to each other through the gap; The second surface is printed with a second coupling microstrip line, the second coupling microstrip line is coupled and connected to the first coupling microstrip line, and the second coupling microstrip line is connected to a feeding welding point for electrically connecting to a feeding circuit on the first circuit board.

2. The antenna according to claim 1, characterized in that Each of the resonant arms includes a first resonant arm and a second resonant arm, the first resonant arm and the second resonant arm are arranged in parallel and spaced apart, and the first resonant arm and the second resonant arm are electrically connected via the first coupling microstrip line.

3. The antenna according to claim 2, characterized in that: The first resonant arm comprises a first straight extension segment and at least one second straight extension segment, wherein the at least one second straight extension segment is vertically connected to one end of the first straight extension segment; The second resonant arm comprises a third straight extension segment and at least one fourth straight extension segment, wherein the at least one fourth straight extension segment is vertically connected to one end of the third straight extension segment; The third straight line extension segment is arranged in parallel with the first straight line extension segment and is spaced apart from each other, and the third straight line extension segment is electrically connected to the first straight line extension segment through the first coupling microstrip line.

4. The antenna according to any one of claims 1 to 3, characterized in that: There are four resonant arms, and the resonant arms are arranged in parallel with equal intervals.

5. The antenna according to any one of claims 1 to 3, characterized in that: It also includes a bracket, and the plurality of resonant arms and grounded resonant branches are respectively spirally wound along the lower end of the bracket toward the upper end of the bracket.

6. A terminal, characterized in that: Comprising the antenna as described in any one of claims 1-5.

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