阅读说明：本技术 一种用于5GHz通信的周期性米字形透波材料以及机箱 (Periodic wave-transparent material shaped like Chinese character 'mi' for 5GHz communication and case ) 是由 冯佳琦 孙莉 李永正 党炜 于 2020-05-20 设计创作，主要内容包括：本发明提供一种用于5GHz通信的周期性米字形透波材料以及机箱,包括基板,所述基板开设若干个米字形透波单元；每个所述米字形透波单元包括四个等长度、等宽度的矩形缝,矩形缝形成米字形结构。矩形缝的长度均为25.8mm,宽度均为2mm；各个所述米字形透波单元按照28mm的单元间距周期性排列。优点为：本发明提供的用于5GHz通信的周期性米字形透波材料,通过对开孔的形状和结构尺寸进行精细设计,形成周期性米字形开孔结构,能够使位于机箱内部的WIFI天线发射的5.735GHz～5.835GHz频段的电磁波辐射出去,具有对该频段电磁波反射系数低、透射系数高的优点,进而大大提升通信效率。(The invention provides a periodic wave-transmitting material in a shape of a Chinese character 'mi' for 5GHz communication and a case, wherein the periodic wave-transmitting material comprises a substrate, and a plurality of wave-transmitting units in a shape of a Chinese character 'mi' are arranged on the substrate; each wave-transparent unit in the shape of a Chinese character 'mi' comprises four rectangular seams with equal length and equal width, and the rectangular seams form a structure in the shape of a Chinese character 'mi'. The length of each rectangular seam is 25.8mm, and the width of each rectangular seam is 2 mm; and the wave-transmitting units in the shape of a Chinese character 'mi' are periodically arranged according to a unit interval of 28 mm. Has the advantages that: the periodic wave-transmitting material in the shape of a Chinese character 'mi' for 5GHz communication provided by the invention forms the periodic structure with the openings in the shape of Chinese character 'mi' by finely designing the shape and the structural size of the openings, so that electromagnetic waves in a frequency band of 5.735 GHz-5.835 GHz emitted by a WIFI antenna positioned in a case can be radiated, and the periodic wave-transmitting material has the advantages of low reflection coefficient and high transmission coefficient of electromagnetic waves in the frequency band, and further greatly improves the communication efficiency.)

1. A periodic wave-transmitting material shaped like a Chinese character 'mi' for 5GHz communication is characterized by comprising a substrate, wherein the substrate is provided with a plurality of wave-transmitting units shaped like Chinese character 'mi'; each meter-shaped wave-transparent unit comprises four rectangular slits with equal length and equal width, and the four rectangular slits are respectively as follows: the first rectangular seam, the second rectangular seam, the third rectangular seam and the fourth rectangular seam; the arrangement modes of the first rectangular seam, the second rectangular seam, the third rectangular seam and the fourth rectangular seam are as follows: the center of the first rectangular seam, the center of the second rectangular seam, the center of the third rectangular seam and the center of the fourth rectangular seam are located at the same central point, the first rectangular seam is horizontally arranged, and the first rectangular seam rotates clockwise by 45 degrees around the central point of the first rectangular seam and is the position of the second rectangular seam; the first rectangular seam rotates clockwise by 90 degrees around the center point of the first rectangular seam and is the position of the third rectangular seam; the first rectangular seam rotates clockwise by 135 degrees around the center point of the first rectangular seam, and is the position of the fourth rectangular seam;

the length of each of the first rectangular seam, the second rectangular seam, the third rectangular seam and the fourth rectangular seam is 25.8mm, and the width of each of the first rectangular seam, the second rectangular seam, the third rectangular seam and the fourth rectangular seam is 2 mm;

and the wave-transmitting units in the shape of a Chinese character 'mi' are periodically arranged according to a unit interval of 28 mm.

2. The periodic wave-transparent material in a shape of a Chinese character 'mi' for 5GHz communication according to claim 1, wherein each wave-transparent unit in a shape of a Chinese character 'mi' is arranged to form a matrix form with N rows and M columns; wherein N and M are both natural numbers; the row spacing and the column spacing are equal and are both 28 mm; wherein, the line spacing means: the distance between the central points of two adjacent wave-transparent units in the shape of a Chinese character 'mi' arranged in a row; the row spacing means: the distance between the center points of two adjacent wave-transparent units in the shape of a Chinese character 'mi' arranged in a row.

3. The periodic wave-transparent Mie-shaped material for 5GHz communication according to claim 1, wherein the periodic wave-transparent Mie-shaped material for 5GHz communication is used for smooth passing of electromagnetic waves in the WIFI frequency band of 5.735 GHz-5.835 GHz5 GHz.

4. The periodic wave-transmitting material in a Mie shape for 5GHz communication according to claim 1, wherein the periodic wave-transmitting material in a Mie shape for 5GHz communication has reflection coefficients below-22 dB and transmission coefficients above-0.03 dB for electromagnetic waves in 5.735 GHz-5.835 GHz5GHz WIFI frequency band.

5. A chassis, characterized in that, the chassis wall of the chassis is made of the periodic wave-transparent material in the shape of a Chinese character 'mi' as claimed in any one of claims 1 to 4 for 5GHz communication.

Technical Field

The invention belongs to the technical field of electromagnetism, and particularly relates to a periodic wave-transmitting material shaped like a Chinese character 'mi' and a case for 5GHz communication.

Background

Along with the electronic system integration degree constantly improves, some transceivers need integrate in quick-witted incasement portion for the WIFI antenna of communication also need place at quick-witted incasement portion, and at this moment, for making the electromagnetic wave of WIFI antenna transmission pass through quick-witted case smoothly, need punch the design to quick-witted case. In the prior art, a chassis is mainly provided with honeycomb-shaped round holes.

In the process of implementing the invention, the inventor finds that the prior art has at least the following problems

The chassis with the honeycomb-shaped round holes still has a large blocking effect on electromagnetic waves emitted by the WIFI antenna in actual use, can obviously reduce the transmittance of 5.735 GHz-5.835 GHz5GHz WIFI frequency bands, and improves the reflectivity, so that the radiation performance of the WIFI antenna is reduced, and the normal work of a transceiver is influenced. Therefore, how to solve the problem is an urgent need to solve the problem.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a periodic wave-transparent material shaped like a Chinese character 'mi' for 5GHz communication and a chassis, which can effectively solve the problems.

The technical scheme adopted by the invention is as follows:

the invention provides a periodic wave-transmitting material in a shape of a Chinese character 'mi' for 5GHz communication, which comprises a substrate, wherein the substrate is provided with a plurality of wave-transmitting units in a shape of a Chinese character 'mi'; each meter-shaped wave-transparent unit comprises four rectangular slits with equal length and equal width, and the four rectangular slits are respectively as follows: the first rectangular seam, the second rectangular seam, the third rectangular seam and the fourth rectangular seam; the arrangement modes of the first rectangular seam, the second rectangular seam, the third rectangular seam and the fourth rectangular seam are as follows: the center of the first rectangular seam, the center of the second rectangular seam, the center of the third rectangular seam and the center of the fourth rectangular seam are located at the same central point, the first rectangular seam is horizontally arranged, and the first rectangular seam rotates clockwise by 45 degrees around the central point of the first rectangular seam and is the position of the second rectangular seam; the first rectangular seam rotates clockwise by 90 degrees around the center point of the first rectangular seam and is the position of the third rectangular seam; the first rectangular seam rotates clockwise by 135 degrees around the center point of the first rectangular seam, and is the position of the fourth rectangular seam;

the length of each of the first rectangular seam, the second rectangular seam, the third rectangular seam and the fourth rectangular seam is 25.8mm, and the width of each of the first rectangular seam, the second rectangular seam, the third rectangular seam and the fourth rectangular seam is 2 mm;

and the wave-transmitting units in the shape of a Chinese character 'mi' are periodically arranged according to a unit interval of 28 mm.

Preferably, each of the wave-transparent units in the shape of a Chinese character 'mi' is arranged to form a matrix form with N rows and M columns; wherein N and M are both natural numbers; the row spacing and the column spacing are equal and are both 28 mm; wherein, the line spacing means: the distance between the central points of two adjacent wave-transparent units in the shape of a Chinese character 'mi' arranged in a row; the row spacing means: the distance between the center points of two adjacent wave-transparent units in the shape of a Chinese character 'mi' arranged in a row.

Preferably, the periodic wave-transparent material in a shape like a Chinese character 'mi' for 5GHz communication is used for enabling electromagnetic waves in a WIFI frequency range of 5.735 GHz-5.835 GHz to pass smoothly.

Preferably, the periodic wave-transmitting material in the shape of a Chinese character 'mi' for 5GHz communication has the reflection coefficient below-22 dB and the transmission coefficient above-0.03 dB for electromagnetic waves in a WIFI frequency band of 5.735 GHz-5.835 GHz and 5 GHz.

The invention also provides a case, and the case wall of the case is made of a 5GHz communication periodic wave-transparent material shaped like a Chinese character 'mi'.

The periodic wave-transparent material in the shape of a Chinese character 'mi' for 5GHz communication and the chassis provided by the invention have the following advantages:

the periodic wave-transmitting material in the shape of a Chinese character 'mi' for 5GHz communication provided by the invention forms the periodic structure with the openings in the shape of Chinese character 'mi' by finely designing the shape and the structural size of the openings, so that electromagnetic waves in a frequency band of 5.735 GHz-5.835 GHz emitted by a WIFI antenna positioned in a case can be radiated, and the periodic wave-transmitting material has the advantages of low reflection coefficient and high transmission coefficient of electromagnetic waves in the frequency band, and further greatly improves the communication efficiency.

Drawings

FIG. 1 is a diagram of a specific example of a periodic wave-transparent material in a shape of a Chinese character 'mi' for 5GHz communication according to the present invention;

FIG. 2 is a structural diagram of a wave-transparent unit in a shape of a Chinese character 'mi' provided by the present invention;

FIG. 3 is a block diagram of a chassis provided by the present invention;

FIG. 4 is a diagram showing the result of S parameter simulation performed on a wave-transparent unit shaped like a Chinese character 'mi' according to the present invention;

fig. 5 is a comparison graph of reflection coefficients of the bare antenna and the antenna using the wave-transparent units shaped like a Chinese character mi.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention provides a periodic wave-transparent material in a shape of a Chinese character 'mi' for 5GHz communication, which is mainly used for communication in a 5GHz WIFI frequency band (5.735 GHz-5.835 GHz), and can enable electromagnetic waves in the 5GHz WIFI frequency band (5.735 GHz-5.835 GHz) to smoothly pass through a case, thereby greatly improving the communication efficiency. As shown in fig. 1, a specific example of a periodic wave-transparent material in a shape like a Chinese character 'mi' for 5GHz communication includes a substrate 1, where the substrate 1 is provided with a plurality of wave-transparent units 2 in a shape like a Chinese character 'mi';

as shown in fig. 2, the structural diagram of the wave-transparent units in a shape of a Chinese character 'mi', each wave-transparent unit 2 in a shape of a Chinese character 'mi' includes four rectangular slits with equal length and equal width, which are respectively: a first rectangular slit 3, a second rectangular slit 4, a third rectangular slit 5 and a fourth rectangular slit 6; the arrangement mode of the first rectangular seam 3, the second rectangular seam 4, the third rectangular seam 5 and the fourth rectangular seam 6 is as follows: the center of the first rectangular seam 3, the center of the second rectangular seam 4, the center of the third rectangular seam 5 and the center of the fourth rectangular seam 6 are positioned at the same central point, the first rectangular seam 3 is horizontally arranged, and the first rectangular seam 3 rotates clockwise by 45 degrees around the central point thereof and is the position of the second rectangular seam 4; the first rectangular seam 3 rotates clockwise by 90 degrees around the center point of the first rectangular seam and is the position of the third rectangular seam 5; the first rectangular seam 3 rotates clockwise by 135 degrees around the center point of the first rectangular seam and is the position of the fourth rectangular seam 6;

the lengths l of the first rectangular seam 3, the second rectangular seam 4, the third rectangular seam 5 and the fourth rectangular seam 6 are all 25.8mm, and the widths w are all 2 mm;

and the wave-transmitting units in the shape of a Chinese character 'mi' are periodically arranged according to a unit interval of 28 mm. More specifically, each of the wave-transparent units in the shape of a Chinese character 'mi' is arranged to form a matrix form with N rows and M columns, and in fig. 1, the matrix form is a matrix form with 5 rows and 5 columns; wherein N and M are both natural numbers; the row spacing and the column spacing are equal and are both 28 mm; wherein, the line spacing means: the distance between the central points of two adjacent wave-transparent units in the shape of a Chinese character 'mi' arranged in a row; the row spacing means: the distance between the center points of two adjacent wave-transparent units in the shape of a Chinese character 'mi' arranged in a row. In fig. 1, both the row pitch and the column pitch are denoted by a.

The invention also provides a case which is made of the periodic wave-transparent material shaped like a Chinese character 'mi' for 5GHz communication. As shown in fig. 3, the structure of the chassis is shown, where 7 is a WIFI antenna and 8 is the chassis.

The simulation result of the S parameter of the above-mentioned wave-transparent unit shaped like a Chinese character 'mi', i.e., the wave-transparent unit shaped like a Chinese character 'mi' shown in fig. 2 is shown in fig. 4. As can be seen from fig. 4, the transmission coefficients of the wave-transparent unit in the shape of a Chinese character 'mi' are all above-0.03 dB in the 5GHz WIFI frequency band (5.735 GHz-5.835 GHz), and the reflection coefficients are all below-22 dB, which indicates that the electromagnetic waves in this frequency band can freely penetrate through the wave-transparent unit in the shape of a Chinese character 'mi' with very small loss.

A comparative test example is described below:

the periodic wave-transparent material in the shape of a Chinese character 'mi' for 5GHz communication is manufactured to form a chassis, and a patch antenna working in a 5GHz WIFI frequency band (5.785GHz) is used as an equivalent radiation source and is placed in the chassis, namely the structure shown in fig. 3, and the chassis is used as a test example. The patch antenna working at 5GHz wifi frequency band (5.785GHz) is placed in free space, i.e. a bare antenna, as a comparison example. Simulation analysis is performed on the test example and the comparison example to obtain the reflection coefficient of the bare antenna and the reflection coefficient of the antenna in the case made of the periodic wave-transparent material shaped like a Chinese character 'mi', and the result is shown in fig. 5. As can be seen from fig. 5, in any frequency band, the reflection coefficient of the antenna in the test example is lower than that of the bare antenna, and for the antenna, the reflection coefficient is small, which means that the better the transmission performance is, the better the radiation performance is. Therefore, the chassis formed by the periodic wave-transparent material in the shape of the Chinese character 'mi' does not have adverse effect on the reflection coefficient of the antenna and does not have influence on the matching characteristic of the antenna, and on the contrary, because of the central symmetrical structure in the shape of the Chinese character 'mi' of the special periodic wave-transparent material in the shape of the Chinese character 'mi', the electromagnetic waves with different polarizations can smoothly penetrate through the chassis, so that the chassis forms better matching with a free space, and the permeability of the electromagnetic waves in the WIFI frequency band of 5.735 GHz-5.835 GHz is improved.

Therefore, the periodic meter-shaped wave-transmitting material for 5GHz communication is used for enabling electromagnetic waves in a WIFI frequency band of 5.735 GHz-5.835 GHz5GHz to pass smoothly. More specifically, the reflection coefficient and the transmission coefficient of the electromagnetic wave in the 5.735 GHz-5.835 GHz 5GHzWIFI frequency band are respectively below-22 dB and above-0.03 dB. The wave-transparent structure in the shape of a Chinese character 'mi' has the advantages of insensitive polarization, convenient processing, easy popularization to other frequency bands and the like. Compared with the common single-slit opening and the waveguide window opening, the waveguide window opening is insensitive to the polarization of electromagnetic waves and can be more suitable for various communication environments; compared with the large round hole, the dustproof case can protect the internal structure of the case and achieve the dustproof effect.

In summary, the periodic meter-shaped wave-transmitting material and the chassis for 5GHz communication provided by the invention have the following advantages:

the periodic wave-transmitting material in the shape of a Chinese character 'mi' for 5GHz communication provided by the invention forms the periodic structure with the openings in the shape of Chinese character 'mi' by finely designing the shape and the structural size of the openings, so that electromagnetic waves in a frequency band of 5.735 GHz-5.835 GHz emitted by a WIFI antenna positioned in a case can be radiated, and the periodic wave-transmitting material has the advantages of low reflection coefficient and high transmission coefficient of electromagnetic waves in the frequency band, and further greatly improves the communication efficiency.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements should also be considered within the scope of the present invention.