CN209822868U

CN209822868U - Antenna with plane lens

Info

Publication number: CN209822868U
Application number: CN201920670079.7U
Authority: CN
Inventors: 郑洪振; 尚春辉
Original assignee: Foshan Eahison Communication Co Ltd
Current assignee: Foshan Eahison Communication Co Ltd
Priority date: 2019-05-13
Filing date: 2019-05-13
Publication date: 2019-12-20
Anticipated expiration: 2029-05-13

Abstract

The utility model provides a take antenna of planar lens, it has the focusing effect to the electromagnetic wave, and processing technology is simple, and the focusing performance is good. The antenna with the planar lens comprises a feed source element and the planar lens; in particular, the planar lens is composed of several dielectric layers; the number of the dielectric layers is 2-18; the thickness of a certain dielectric layer is uniform; adjacent dielectric layers are arranged in a close fit manner, and the respective dielectric constants of the adjacent dielectric layers are different from each other; the dielectric layers closest to the feed source element to the dielectric layers farthest from the feed source element are arranged according to the rule that the dielectric constant is larger and larger, or the dielectric constant is increased first and then reduced. The utility model discloses a take antenna of planar lens, under the condition that provides the same gain, its volume ratio is little a lot than current antenna size, changes in installation and maintenance, and the cost is also lower.

Description

Antenna with plane lens

Technical Field

The utility model relates to a communication antenna especially relates to take antenna of planar lens.

Background

For narrow-beam high-gain antennas frequently used in mobile communication, the surface windward area of the high-gain antennas is large, and the requirements on mounting iron towers for erecting the antennas are very high. In order to achieve the purpose of high-gain narrow-beam antenna, a common method at present is to mount a spherical lens or a cylindrical lens in front of the emitting surface of the antenna to focus electromagnetic waves, but the processing technology of these lenses is complex, and the anisotropy rate of the finished product is high.

Chinese patent document entitled "array panel antenna with dielectric lens module", granted publication No. CN205564975U, discloses an antenna with planar dielectric lens module, wherein the dielectric lens module is a single-layer structure with a dielectric constant in the range of 2.60-2.74, and the dielectric lens module is required to be used in cooperation with a resonant cavity. However, constructing a cavity for an antenna is cumbersome and costly, and not all antennas are suitable for configuring a cavity.

There is therefore a need for improvements in the construction of existing lensed antennas.

Disclosure of Invention

The utility model provides a take antenna of planar lens, it has the focusing effect to the electromagnetic wave, and processing technology is simple, and the focusing performance is good.

The following technical scheme is adopted:

the antenna with the planar lens comprises a feed source element and the planar lens; in particular, the planar lens is composed of several dielectric layers; the number of the dielectric layers is 2-18; the thickness of a certain dielectric layer is uniform; adjacent dielectric layers are arranged in a close fit manner, and the respective dielectric constants of the adjacent dielectric layers are different from each other; the dielectric layers closest to the feed source element to the dielectric layers farthest from the feed source element are arranged according to the rule that the dielectric constant is larger and larger, or the dielectric constant is increased first and then reduced.

The working principle of the antenna is as follows: the gain of the antenna is closely related to the directional pattern of the antenna, for example, the narrower the beam width of the directional pattern of the antenna, the higher the gain of the antenna is under the same loss of the feed network. The conventional antenna is designed to increase the effective radiation area of the antenna if it is desired to narrow the beam width of the antenna. Generally speaking, the larger the size of the antenna is, the narrower the beam of the antenna is, and the lens antenna of the present invention focuses the wide beam from the feed element through the planar lens to narrow and increase the gain, so that the size of the antenna becomes smaller under the same gain. The working principle of the planar lens is that when the electromagnetic wave passes through the dielectric layer with the dielectric constant larger than 1, the propagation direction of the part of the electromagnetic wave which vertically passes through the dielectric layer cannot be changed; instead of the portion of the electromagnetic wave that passes perpendicularly through the dielectric layer, the direction of propagation will be changed. After the direction of the feed source element is changed through the multiple dielectric layers, the beam width of the feed source element is narrowed, the directivity is stronger, and the gain is higher, so that the feed source element is particularly suitable for high-frequency communication such as 5G communication. The utility model discloses a planar lens can have 2 kinds of different arrangement rules between its dielectric layer, how to select these two kinds of different arrangement rules, is that the dielectric constant with the operating frequency of feed source spare, feed source spare's size, each dielectric layer sets for, actual measurement effect etc. is relevant, but these two kinds of arrangement rules finally all make the width of former beam narrow down, directive property is stronger.

The thickness of the dielectric layer is within the range of 0.1-1 wavelength, and the wavelength refers to the wavelength of electromagnetic waves when the feed source part works.

The difference between the dielectric constants of the adjacent dielectric layers can be in the range of 0.002 to 2.

The difference between their dielectric constants of adjacent dielectric layers may be a constant.

The outline shape of the planar lens may be a polygon or a circle.

The profile size of the planar lens is preferably within the following rectangular range or circular range: the rectangular range is a rectangular range with the length of 0.5-10 wavelengths and the width of 0.5-10 wavelengths; the circular range refers to the circular range with the diameter of 0.5-10 wavelengths; the wavelength refers to the wavelength of electromagnetic waves when the feed source piece works.

The dielectric layer is preferably formed by mixing a fibrous metal conductor into a non-metal material.

The feed source piece can be a single oscillator or an oscillator array.

The feed element is preferably a feed element or an oscillator array of a 5G frequency band.

The utility model discloses a take antenna of planar lens, under the condition that provides the same gain, its volume ratio is little a lot than current antenna size, changes in installation and maintenance, and the cost is also lower.

Description of the drawings:

FIG. 1 is a schematic structural view of example 1;

FIG. 2 is a schematic structural view of example 2;

FIG. 3 is a schematic structural view of embodiment 3;

FIG. 4 is a schematic structural view of example 4.

Description of reference numerals: 11-a feed element; 12-a planar lens; 22-a planar lens; 32-a planar lens; 41-feed element.

Detailed Description

The present invention will be further described with reference to the following examples.

Example 1

As shown in fig. 1, the antenna with a planar lens of the present embodiment includes a feed member 11 and a planar lens 12.

The planar lens is composed of 5 dielectric layers, and the thickness of each dielectric layer is uniform, but the thicknesses of different dielectric layers are not necessarily equal. The adjacent dielectric layers are closely arranged, and the respective dielectric constants of the adjacent dielectric layers are different from each other. The dielectric constants of the dielectric layer closest to the feed source piece to the dielectric layer farthest from the feed source piece are DK101, DK102, DK103, DK104 and DK105 in sequence, wherein DK101 is larger than DK102 and larger than DK103 is larger than DK104 and smaller than DK105, namely the dielectric layers are arranged according to the rule that the dielectric constants are larger and larger.

In the process that the beam of the feed source piece penetrates through the planar lens, the dielectric layers with different dielectric constants can influence the propagation direction of the beam, and the dielectric layers of the planar lens of the embodiment are arranged according to the rule that the dielectric constants are larger and larger, so that the width of the original beam is narrowed finally in a pure focusing mode, and the directivity is stronger.

It should be noted that it is not necessary to have a clear interface between the dielectric layers, and in fact there is often a transition region between these dielectric layers where the dielectric constant is also theoretically transitive.

Example 2

As shown in fig. 2, the present embodiment is different from embodiment 1 in that: the planar lens 22 is composed of 11 dielectric layers, and the dielectric constants of the dielectric layer closest to the feed source member to the dielectric layer farthest from the feed source member are DK201, DK202, DK203, DK204, DK205, DK206, DK207, DK208, DK209, DK210 and DK211 in sequence, wherein DK201 is greater than DK202 and greater than DK203 and greater than DK204 and less than DK205 and greater than DK206, DK207 is greater than DK208 and greater than DK209 and greater than DK210 and greater than DK211, namely the dielectric layers are arranged according to the rule that the dielectric constant is increased and then decreased.

The dielectric layers of the planar lens 22 of this embodiment are arranged according to the rule that the dielectric constant increases first and then decreases, so that the width of the primary beam is narrowed finally in a manner of focusing first and then diverging, and the directivity is stronger. It should be noted that the intensity of the divergent effect should be smaller than the intensity of the focused effect to narrow the width of the primary beam finally.

In this example, DK201, DK202, DK203, DK204, DK205, and DK206 form an arithmetic progression a 1. DK206, DK207, DK208, DK209, DK210, DK211 also form an arithmetic progression a 2. In addition, the tolerance of the arithmetic progression a1 may be equal to the absolute value of the tolerance of the arithmetic progression a 2.

Example 3

As shown in fig. 3, the present embodiment is different from embodiment 1 in that: the planar lens 32 is composed of 9 dielectric layers, and the dielectric constants of the dielectric layer closest to the feed source piece to the dielectric layer farthest from the feed source piece are DK301, DK302, DK303, DK304, DK305, DK306, DK307, DK308 and DK309 in sequence, wherein DK301 is larger than DK302 and larger than DK303 and larger than DK304 and smaller than DK305, and DK305 is larger than DK306 and larger than DK307 and larger than DK308 and larger than DK309, namely the dielectric layers are arranged according to the rule that the dielectric constants are increased and then decreased.

DK301 ≠ DK309, DK302 ≠ DK308, DK303 ≠ DK307, and DK304 ≠ DK 306.

Example 4

As shown in fig. 4, the present embodiment is different from embodiment 1 in that: the feed element 41 is an array of elements.

The preferred embodiment of the present invention is only listed in the present specification, and all the technical changes equivalent to those made under the working principle and thought of the present invention are considered as the protection scope of the present invention.

Claims

1. The antenna with the planar lens comprises a feed source element and the planar lens; the method is characterized in that: the planar lens is composed of a plurality of medium layers; the number of the dielectric layers is 2-18; the thickness of a certain dielectric layer is uniform; adjacent dielectric layers are arranged in a close fit manner, and the respective dielectric constants of the adjacent dielectric layers are different from each other; the dielectric layers closest to the feed source element to the dielectric layers farthest from the feed source element are arranged according to the rule that the dielectric constant is larger and larger, or the dielectric constant is increased first and then reduced.

2. The antenna with planar lens of claim 1, wherein: the thickness of the dielectric layer is within the range of 0.1-1 wavelength, and the wavelength refers to the wavelength of electromagnetic waves when the feed source part works.

3. The antenna with planar lens of claim 1, wherein: the difference between the dielectric constants of the adjacent dielectric layers is in the range of 0.002 to 2.

4. The antenna with planar lens of claim 1, wherein: the difference between their dielectric constants of adjacent dielectric layers is a constant.

5. The antenna with planar lens of claim 1, wherein: the outline shape of the planar lens is a polygon or a circle.

6. The antenna with planar lens of claim 1, wherein: the outline size of the plane lens is in the following rectangular range or circular range: the rectangular range is a rectangular range with the length of 0.5-10 wavelengths and the width of 0.5-10 wavelengths; the circular range refers to the circular range with the diameter of 0.5-10 wavelengths; the wavelength refers to the wavelength of electromagnetic waves when the feed source piece works.

7. The antenna with planar lens of claim 1, wherein: the structure of the dielectric layer is that fibrous metal conductors are mixed in non-metal materials.

8. The antenna with planar lens of claim 1, wherein: the feed element is a single oscillator or an array of oscillators.

9. The antenna with planar lens of claim 1, wherein: the feed element is a feed element or vibrator array of a 5G frequency band.