CN220628220U - Wide axial ratio circularly polarized antenna - Google Patents

Abstract

The utility model discloses a wide-axial-ratio circularly polarized antenna, which comprises a substrate and a dielectric member, wherein a feed column is embedded in the substrate, a stratum is arranged on the top surface of the substrate, a clearance area is arranged on the stratum corresponding to the feed column, the dielectric member is arranged on the stratum, a main circuit and a plurality of parasitic circuits are arranged on one side surface of the dielectric member, the main circuit and the parasitic circuits are respectively n-shaped, one end of the main circuit is contacted with the stratum, the other end of the main circuit is connected with the feed column, the parasitic circuits are positioned on the inner side of the main circuit, and two ends of the parasitic circuits are respectively abutted against the stratum. The antenna has the advantages of simple and novel structure, convenient processing and manufacturing, capability of realizing circular polarization effect and wider axial ratio width.

Description

Wide axial ratio circularly polarized antenna

Technical Field

The utility model relates to the technical field of antennas, in particular to a wide-axial-ratio circularly polarized antenna.

Background

An antenna is a device in a radio system that emits or receives electromagnetic waves, the functional nature of which is energy conversion, also known as a matching of a wave source to space. Along with the continuous rise of communication frequency, millimeter waves can be applied to earth orbit satellite communication besides the traditional mobile terminal and base station terminal.

The satellite communication requires the antenna to radiate the circularly polarized wave, but the traditional antenna circularly polarized structure form has very narrow axial ratio bandwidth, the wide axial ratio circularly polarized antenna is a difficult problem of antenna design, and the traditional wide axial ratio circularly polarized antenna generally has the problem of complex structure, so that the wide axial ratio circularly polarized antenna with simple structure needs to be provided.

Disclosure of Invention

The technical problems solved by the utility model are as follows: a simple wide-axis-ratio circularly polarized antenna is provided.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a wide axial ratio circular polarization antenna, includes base plate and medium spare, the base plate is embedded to be equipped with the feed post, the top surface of base plate is equipped with the stratum, the stratum corresponds the feed post is equipped with keeps away the blank area, the medium spare is located on the stratum, a side of medium spare is equipped with main circuit and a plurality of parasitic circuit, main circuit and parasitic circuit are n style of calligraphy respectively, the one end contact of main circuit the stratum, the other end of main circuit is connected the feed post, parasitic circuit is located the inboard of main circuit, the both ends of parasitic circuit are contradicted respectively the stratum.

In an embodiment, the number of the parasitic wires is a plurality, and one of the two adjacent parasitic wires is located inside the other parasitic wire.

In an embodiment, the dielectric member includes a PCB board and a dielectric block in contact with each other, and the main circuit and the parasitic circuit are both located at a side of the PCB board away from the dielectric block.

In one embodiment, the dielectric block is made of ceramic.

In an embodiment, the dielectric block is rectangular, the PCB board is rectangular, and the height of the PCB board is equal to the height of the dielectric block.

In an embodiment, the width of the PCB is equal to the width of the dielectric block.

In an embodiment, the dielectric constant of the PCB board is smaller than the dielectric constant of the dielectric block.

In an embodiment, the material of the dielectric member is ceramic.

The utility model has the beneficial effects that: the antenna has the advantages of simple and novel structure, convenient processing and manufacturing, capability of realizing circular polarization effect and wider axial ratio width.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a wide-axis-ratio circularly polarized antenna according to a first embodiment of the present utility model;

fig. 2 is an S-parameter diagram of a wide-axis ratio circularly polarized antenna according to a first embodiment of the present utility model;

fig. 3 is an axial ratio parameter diagram of a wide axial ratio circularly polarized antenna according to a first embodiment of the present utility model.

Reference numerals illustrate:

1. a substrate;

2. a dielectric member; 21. a PCB board; 22. a dielectric block;

3. a feed post;

4. a formation; 41. a void area is avoided;

5. a main line;

6. parasitic wiring.

Detailed Description

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the embodiment of the present utility model, directional indications such as up, down, left, right, front, and rear … … are referred to, and the directional indication is merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture such as that shown in the drawings, and if the specific posture is changed, the directional indication is changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

In addition, if the meaning of "and/or" is presented throughout this document to include three parallel schemes, taking "and/or" as an example, including a scheme, or a scheme that is satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

Example 1

Referring to fig. 1 to 3, a first embodiment of the present utility model is as follows: as shown in fig. 1, the wide-axis-ratio circularly polarized antenna comprises a substrate 1 and a dielectric member 2, a feed column 3 is embedded in the substrate 1, a stratum 4 is arranged on the top surface of the substrate 1, a clearance area 41 is arranged on the stratum 4 corresponding to the feed column 3, the dielectric member 2 is arranged on the stratum 4, a main circuit 5 and a plurality of parasitic circuits 6 are arranged on one side surface of the dielectric member 2, the main circuit 5 and the parasitic circuits 6 are respectively n-shaped, one end of the main circuit 5 contacts the stratum 4, the other end of the main circuit 5 is connected with the feed column 3, the parasitic circuits 6 are positioned on the inner side of the main circuit 5, and two ends of the parasitic circuits 6 respectively abut against the stratum 4.

The antenna forms annular current on a feed surface of the dielectric member 2, so that the antenna realizes circular polarization, and when the number of the annular current turns is larger, the axial ratio bandwidth of the antenna is wider theoretically. Therefore, alternatively, the number of the parasitic wires 6 is plural, and one parasitic wire 6 is located inside the other parasitic wire 6 among two adjacent parasitic wires 6. However, in this embodiment, the number of the parasitic lines 6 is one, which can make the antenna structure simpler.

In detail, the main circuit 5 includes a first branch, a second branch and a third branch which are sequentially and vertically connected, the first branch and the third branch are relatively arranged and have equal lengths, one end of the first branch, which is far away from the second branch, is connected with the feed column 3, and one end of the third branch, which is far away from the second branch, is contacted with the stratum 4. The parasitic line 6 comprises a fourth branch, a fifth branch and a sixth branch which are sequentially and vertically connected, the fourth branch and the sixth branch are oppositely arranged, the lengths of the fourth branch and the sixth branch are equal, one end of the fourth branch, which is far away from the fifth branch, and one end of the sixth branch, which is far away from the fifth branch, are in contact with the stratum 4.

In some embodiments, the medium member 2 may be an integrally formed monolithic structure, and in this case, the medium member 2 may be made of ceramic or the like. However, since the cost of arranging the metallic main circuit 5 and the parasitic circuit 6 on the ceramic surface is relatively high, in order to save the manufacturing cost of the antenna, in this embodiment, the dielectric member 2 includes a PCB 21 and a dielectric block 22 that are in contact, the dielectric block 22 is made of ceramic or other dielectric materials, the dielectric constant of the PCB 21 is smaller than that of the dielectric block 22, and the main circuit 5 and the parasitic circuit 6 are both located at one side of the PCB 21 far away from the dielectric block 22.

Optionally, the dielectric block 22 is rectangular, the PCB 21 is rectangular, and the height of the PCB 21 is equal to the height of the dielectric block 22; the width of the PCB 21 is equal to the width of the dielectric block 22.

Fig. 2 is an S-parameter diagram of the wide-axis-ratio circularly polarized antenna of the present embodiment, and as can be seen from fig. 2, the wide-axis-ratio circularly polarized antenna of the present embodiment achieves the effect of a wideband antenna, and can cover 26.8-34.5GHz.

Fig. 3 is an axial ratio parameter diagram of the wide axial ratio circularly polarized antenna of the embodiment, and as can be seen from fig. 3, the 3db axial ratio width of the wide axial ratio circularly polarized antenna of the embodiment is 28.5-33.5GHz, so as to achieve the effect of the wide axial ratio.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (8)

1. The wide-axis-ratio circularly polarized antenna is characterized in that: including base plate and medium spare, the base plate is embedded to be equipped with the feed post, the top surface of base plate is equipped with the stratum, the stratum corresponds the feed post is equipped with keeps away the sky area, the medium spare is located on the stratum, a side of medium spare is equipped with main line and a plurality of parasitic circuit, main line and parasitic circuit are n style of calligraphy respectively, the one end contact of main line the stratum, the other end of main line is connected the feed post, parasitic circuit is located the inboard of main line, parasitic circuit's both ends are contradicted respectively the stratum.

2. The wide-axis ratio circularly polarized antenna of claim 1, wherein: the number of the parasitic lines is a plurality, and one parasitic line is positioned on the inner side of the other parasitic line in two adjacent parasitic lines.

3. The wide-axis ratio circularly polarized antenna of claim 1, wherein: the medium piece comprises a PCB board and a medium block which are in contact, and the main circuit and the parasitic circuit are both positioned on one side of the PCB board away from the medium block.

4. A wide-axis ratio circularly polarized antenna as claimed in claim 3, wherein: the dielectric block is made of ceramic.

5. A wide-axis ratio circularly polarized antenna as claimed in claim 3, wherein: the dielectric block is rectangular, the PCB is rectangular, and the height of the PCB is equal to the height of the dielectric block.

6. The wide-axis ratio circularly polarized antenna of claim 5, wherein: the width of the PCB is equal to that of the dielectric block.

7. A wide-axis ratio circularly polarized antenna as claimed in claim 3, wherein: the dielectric constant of the PCB is smaller than that of the dielectric block.

8. The wide-axis ratio circularly polarized antenna of claim 1, wherein: the medium piece is made of ceramic.