CN104282982A - A computer battery board equipped with a built-in antenna - Google Patents

Abstract

The invention discloses a computer battery board equipped with a built-in antenna, which includes a battery board body, an antenna and a metal sheet, a groove is opened on the battery board body, the antenna is arranged in the groove, and a feed point and a feed point are arranged at the end of the antenna. The grounding point, feeding point, and grounding point are all connected to the main board inside the battery board body. The metal sheet wraps the part of the battery board body that contains the antenna, and the metal sheet has a slender small protrusion on the top of the groove, and the slender small The protrusion may wrap over the antenna. The invention prepares a space-saving computer battery board by adopting a combination method in which the antenna is embedded in the battery board body, which can reduce radiation and reduce the volume of the antenna. The antenna is provided with a casing and wrapped with a metal sheet to enhance signal reception. , suitable for smaller portable notebook computers.

Description

A computer battery board equipped with a built-in antenna

technical field

The present invention relates to the field of communication, specifically a computer battery board equipped with a built-in antenna, which reduces radiation and reduces the size of the antenna.

Background technique

An antenna is a transformer that transforms a guided wave propagating on a transmission line into an electromagnetic wave propagating in an unbounded medium, or vice versa. A component used in radio equipment to transmit or receive electromagnetic waves. Engineering systems such as radio communication, broadcasting, television, radar , navigation, electronic countermeasures, remote sensing, and radio astronomy, which use electromagnetic waves to transmit information, rely on antennas to work.

Nowadays, the application range of computers is more and more extensive, but the problem of poor signal in computers has always brought troubles to people's use. Although the existing built-in antennas cannot be seen on the outer surface of the computer, most of these built-in antennas have problems such as very wide frequency bands and poor signal reception effects. People also like portable, light and handy laptop more and more, but because of its bulky, cause certain inconvenience.

The antenna is an important device that reflects the radiation performance of the computer. In recent years, tablet computers have developed rapidly, and tablet computer antennas tend to be multi-frequency; tablet computer antennas often use Monopole antennas. Although Monopole antennas are not limited by volume, the specific absorption rate (SAR) is Specific Absorption Rate and human body induction indicators. It hasn't been particularly good. The SAR currently mentioned in the world is aimed at the radiation generated by wireless communication equipment such as cellular mobile phones, commonly known as mobile phones, that is, under the action of an external electromagnetic field, an induced electromagnetic field will be generated in the human body. Dissipative medium, so the electromagnetic field in the body will generate electric current, resulting in the absorption and dissipation of electromagnetic energy. RF energy radiated by cell phone antennas is absorbed by the body and generates heat, which is transmitted through the body's thermoregulatory system. The definition of SAR is a ratio of electromagnetic power absorbed or consumed by the human brain and the human body. It is a unit of expression for measuring how much radio frequency radiation energy is actually absorbed by the body. It is called the special absorption ratio or SAR, expressed in watts per kilogram or milliseconds Expressed in watts per gram. The SAR test uses radio wave energy generated by wireless communication equipment to measure how much electromagnetic radiation is absorbed by the human body, that is, the brain or body. The sensory index of the tablet computer test mainly refers to the human body index. The test method is mainly to simulate the process of normal use of the tablet computer, so that the tablet computer is close to the human body model, which is filled with simulated human tissue fluid. Through such a test model, we can know how much electromagnetic wave radiation energy is absorbed by the human body during the actual work of the tablet computer. At present, there are two international standards, one is the European standard 2w/kg, and the other is the American standard 1.6w/kg. The specific meaning is that, with 6 minutes as the timing, the electromagnetic radiation energy absorbed by each kilogram of human tissue shall not exceed 2 watt. After the test of the actual project, it is found that the SAR index of the tablet computer in the form of Monopole antenna is easy to exceed the standard.

Patent No. CN201789057U discloses a portable notebook computer antenna, which is an independent antenna with small size and good effect, but has large radiation and needs to be carried all the time, which also brings inconvenience to people.

Patent No. 202534780U discloses a low-radiation panel computer antenna with small radiation, but the installation position of the antenna still needs to occupy a certain space, which increases its volume for the tablet computer.

Contents of the invention

The object of the present invention is to provide a computer battery board equipped with a built-in antenna with less radiation and strong signal, so as to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A computer battery board equipped with a built-in antenna, including a battery board body, an antenna and a metal sheet, a groove is opened on the battery board body, the antenna is arranged in the groove, and a feeding point and a The grounding point, feeding point, and grounding point are all connected to the main board inside the battery board body. The metal sheet wraps the part of the battery board body that contains the antenna, and the metal sheet has a slender small protrusion on the top of the groove, and the slender small The protrusion may wrap over the antenna.

As a further solution of the present invention: the groove is set according to the shape of the antenna, a number of protrusions are arranged in the groove, and a number of through holes are opened on the antenna, and the through holes are connected with the protrusions so that the antenna is effectively clamped in the groove Inside.

As a further solution of the present invention: the antenna is made of copper or aluminum.

As a further solution of the present invention: the antenna includes an L-shaped antenna or a loop antenna; the shape of the loop antenna includes a circle, an ellipse, a triangle or a polygon; the L-shaped antenna includes a high-frequency line that generates a high-frequency signal and a low-frequency line that generates a low-frequency signal , the high-frequency line is an L-shaped antenna extending from the feed point, the low-frequency line is an L-shaped antenna extending from the ground point, the low-frequency line is arranged on the periphery of the high-frequency line in a semi-enclosed form, and the low-frequency line and the high-frequency line Mutual coupling produces another low frequency signal.

As a further solution of the present invention: a metal sleeve is installed on the antenna.

As a further solution of the present invention: the metal sheet is made of iron.

Compared with the prior art, the beneficial effect of the present invention is: the present invention adopts the combination method of embedding the antenna on the battery board body to prepare a space-saving computer battery board, which can reduce radiation and reduce the volume of the antenna at the same time. There is a casing, and it is also wrapped with a metal sheet, which can improve the symmetry of the current distribution on the horizontal plane of the antenna, improve the omnidirectional characteristics of the antenna, and enhance signal reception. The raw material of the invention is cheap, easy to manufacture, convenient to install, saves space, can not only enhance signal, but also reduce radiation, and can be widely used in small portable notebook computers.

Description of drawings

Fig. 1 is the structural representation of embodiment 1 of the present invention;

Fig. 2 is a schematic structural view of a metal sheet in Fig. 1;

Fig. 3 is the structural representation of embodiment 2 of the present invention;

Fig. 4 is a schematic structural view of the metal sheet in Fig. 2;

5 is a schematic structural diagram of an L-shaped antenna;

In the figure: 1-battery panel body, 2-antenna, 3-feed point, 4-protrusion, 5-metal sheet, 6-small protrusion, 7-high-frequency line, 8-low-frequency line, 9-grounding point.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In an embodiment of the present invention, a computer battery board equipped with a built-in antenna includes a battery board body 1, an antenna 2, and a metal sheet 5. A groove is opened on the battery board body 1, and the antenna 2 is arranged in the groove. It can be circular, elliptical, triangular or polygonal, etc. The groove is set according to the shape of the antenna. The end of the antenna 2 is provided with a feeding point 3 and a grounding point 9, and the feeding point 3 and the grounding point 9 are connected to the The battery board body 1 is connected to the main board. The metal casing is installed on the antenna 2, which further widens the working bandwidth of the antenna, and the loaded metal casing can improve the symmetry of the current distribution in the horizontal plane of the antenna, and improve the omnidirectional characteristics of the antenna.

There are a number of protrusions 4 in the groove, and a number of through holes are opened on the antenna 2, and the through holes are connected with the protrusions 4. Through this structure, the antenna 2 can be effectively clamped in the groove, the connection is firm, and there will be no loose. The metal sheet 5 is made of iron, and the metal sheet 5 wraps the part of the battery board body 1 that contains the antenna 2, and the metal sheet 5 has a slender small protrusion 6 above the groove, and the slender small protrusion can wrap the antenna 2 above to enhance signal reception. The curved surface of the small protrusion 6 formed by the metal sheet is used to concentrate the electromagnetic wave in a specific direction through this curved surface, that is, to enhance the directivity of the antenna. The signal strength of the antenna can be enhanced through the curved surface of the small protrusion 6 formed by the metal sheet, thereby increasing the chance of receiving signals by the antenna of the electronic device. The metal sheet 5 made of iron can further enhance the signal strength.

Please refer to FIG. 5 , the antenna 2 is made of copper or aluminum, and the antenna 2 includes an L-shaped antenna or a loop antenna. The terminal load impedance of the loop antenna can be zero, or it can be equal to the characteristic impedance of the loop, and the current distribution on it is similar to that of a parallel transmission line. The current on the electric ring is approximately distributed with equal amplitude and same phase. The current on the electric ring is a standing wave distribution. When the impedance of the terminating load is equal to the characteristic impedance of the loop, the current on the loop is a traveling wave distribution. According to the principle of duality of electromagnetic radiation, the radiation fields of the electric small ring and the small electric dipole antenna placed perpendicular to the torus are similar except that the electric and magnetic quantities are interchanged, that is, the pattern on the plane of the torus is For a circle, the direction pattern on the plane where the ring axis is located is figure 8, and the radiation along the ring axis direction is zero. Rings can be hollow or cored; single turn or multiple turns. Theory and experiments prove that the radiation field is proportional to the area of the ring, the number of turns and the current on the ring, and inversely proportional to the square of the working wavelength and the distance; it has little to do with the shape of the ring. Loop antennas can be rectangular, circular, elliptical, triangular, or polygonal. The L-shaped antenna includes a high-frequency line 7 that produces a high-frequency signal and a low-frequency line 8 that produces a low-frequency signal. The high-frequency line is an L-shaped antenna extending from the feed point 3, and the low-frequency line is extended from the ground point 9. In the L-shaped antenna, the low-frequency line is half-enclosed and placed on the periphery of the high-frequency line, and the low-frequency line and the high-frequency line are coupled to each other to generate another low-frequency signal. Antenna 2 adopts a double-feed point method. Pull out an "L"-shaped line from the side of feed point 3 to generate a high-frequency part, and pull out a line around the "L" shape from the ground point to generate a low-frequency part. The surround makes the low-frequency second harmonic move into the 3G range, forming another part of the high-frequency band to obtain a better antenna performance. Through these specific routing forms, the antenna can obtain a better electromagnetic compatibility, especially the SAR can obtain better performance without affecting the performance of the OTA or active test. The distance between the feed point and the ground point needs to be determined during the debugging process, and the matching circuit tuning can also be used during the debugging process. Antenna 2 essentially solves the electromagnetic compatibility of the computer antenna, reduces the SAR index, improves the overall performance of the computer, and improves the design of the computer antenna. In addition to reducing the OTA index, the currently mentioned SAR reduction scheme in China is to add absorbing materials, which not only reduces the overall performance of the antenna, but also increases the production cost. Therefore, the L-shaped antenna used in the present invention can improve performance and reduce costs. of great significance.

Example 1

Please refer to Fig. 1 and Fig. 2. In the embodiment of the present invention, a computer battery board equipped with a built-in antenna includes a battery board body 1, an antenna 2 and a metal sheet 5. The antenna 2 is a rectangular antenna, and the battery board body 1 is provided with a There is a rectangular groove, the antenna 2 is set in the rectangular groove, the end of the antenna 2 is provided with a feed point 3 and a ground point 9, and the feed point 3 and the ground point 9 are connected to the main board in the battery panel body 1.

The metal sheet 5 is made of iron, and the metal sheet 5 wraps the part of the battery board body 1 containing the antenna 2, and the metal sheet 5 has a slender small protrusion 6 above the rectangular groove, and the slender small protrusion can be wrapped in Above the antenna 2, enhance the signal reception.

Example 2

Please refer to Fig. 3 and Fig. 4. In the embodiment of the present invention, a computer battery board equipped with a built-in antenna includes a battery board body 1, an antenna 2 and a metal sheet 5. The antenna 2 is an L-shaped antenna. There is an L-shaped groove, the antenna 2 is set in the L-shaped groove, the end of the antenna 2 is provided with a feed point 3 and a ground point 9, and the feed point 3 and the ground point 9 are connected to the main board inside the battery board body connect.

The metal sheet 5 is made of iron, and the metal sheet 5 wraps the part of the battery board body 1 containing the antenna 2, and the metal sheet 5 has a slender small protrusion 6 above the L-shaped groove, and the slender small protrusion can wrap Above the antenna 2, the reception of the signal is enhanced.

Carry out SAR test to the computer battery board equipped with built-in antenna prepared in embodiment 1 of the present invention and embodiment 2, and compare with the computer battery board of the present invention not using the computer of the same type simultaneously, take 6 minutes as timing, for carrying out 10 A group of experiments were tested, the average value was taken, and the results of measuring the electromagnetic radiation energy absorbed by human tissue were recorded as shown in Table 1.

Table 1

Example SAR value (w/kg) Example 1 1.4 Example 2 1.2 Comparative example 1 2.2

As can be seen from Table 1, the SAR value of Example 1 is 1.4w/kg, the SAR value of Example 2 is 1.2w/kg, and the SAR value of Example 1 and the SAR value in Example 2 are all within the international standard In the scope of 2w/kg, and the SAR value of comparative example 1 exceeds the scope of international standard 2w/kg, wherein, the SAR value of embodiment 1 reduces 36.4% than the SAR value of comparative example 1, and the SAR value of embodiment 2 Compared with the SAR value of Comparative Example 1, it was reduced by 45.5%. The computer battery board equipped with the built-in antenna prepared by the invention can reduce the radiation, thereby reducing the harm to the human body.

In the present invention, a space-saving computer battery board is prepared by embedding the antenna 2 on the battery board body 1, which can reduce radiation and reduce the volume of the antenna 2 at the same time. The antenna 2 is provided with a sleeve and wrapped with a metal sheet 5. , can improve the symmetry of the current distribution on the horizontal plane of the antenna, improve the omnidirectional characteristics of the antenna 2, and enhance signal reception. The raw material of the invention is cheap, easy to manufacture, convenient to install, saves space, can not only enhance signal, but also reduce radiation, and can be widely used in small portable notebook computers.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. the

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (6)

1. A computer battery board equipped with a built-in antenna, characterized in that it includes a battery board body (1), an antenna (2) and a metal sheet (5), and the battery board body (1) is provided with a groove, The antenna (2) is set in the groove, and the end of the antenna (2) is provided with a feeding point (3) and a grounding point (9). (1) The inner main board is connected, the metal sheet (5) wraps the part of the battery board body (1) containing the antenna (2), and the metal sheet (5) has a slender small protrusion (6) above the groove, The elongated small protrusion is above the antenna (2). 2. The computer battery board equipped with a built-in antenna according to claim 1, characterized in that, the groove is set according to the shape of the antenna (2), and several protrusions (4) are arranged in the groove, and the antenna ( 2) A number of through holes are opened on the top, and the through holes are connected with the protrusion (4), so that the antenna (2) is clamped in the groove. 3. The computer battery board with a built-in antenna according to claim 1, characterized in that the antenna (2) is made of copper or aluminum. 4. The computer battery board equipped with a built-in antenna according to claim 1 or 3, characterized in that the antenna (2) includes an L-shaped antenna or a loop antenna; the shape of the loop antenna includes a circle, an ellipse, a triangle or a polygon The L-shaped antenna includes a high-frequency line (7) for generating high-frequency signals and a low-frequency line (8) for generating low-frequency signals. The high-frequency line is an L-shaped antenna extending from the feed point (3), and the low-frequency line is a The L-shaped antenna extended at the location (9), and the low-frequency line (8) is arranged on the periphery of the high-frequency line (7) in a semi-enclosed form, and the low-frequency line (8) and the high-frequency line (7) are coupled to each other to generate another low-frequency signal. 5. The computer battery board with a built-in antenna according to claim 1 or 3, characterized in that a metal sleeve is installed on the antenna (2). 6. The computer battery board with built-in antenna according to claim 1, characterized in that the metal sheet (5) is made of iron.