WO2012142812A1

WO2012142812A1 - Data card antenna and data card

Info

Publication number: WO2012142812A1
Application number: PCT/CN2011/079596
Authority: WO
Inventors: 刘洪涛; 周闯柱
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-04-21
Filing date: 2011-09-14
Publication date: 2012-10-26
Also published as: CN202231142U

Abstract

Disclosed is a data card antenna, the data card antenna comprising an antenna carrier and a high-frequency antenna disposed on a data card mainboard, the high-frequency antenna is connected to a signal line on the data card mainboard, the provided antenna carrier end coordinating with high-frequency antenna is provided with a low-frequency antenna, and the low-frequency antenna on the antenna carrier is connected to the ground of the data card mainboard. The low-frequency antenna connected to ground of the data card mainboard can change the ground environment of the mainboard, and then lead to the radiation direction change of the high-frequency antenna on the data card mainboard, allowing the radiation of the high-frequency antenna to disperse toward all directions as much as possible, thus avoiding the radiation of the high-frequency antenna from concentrating in one direction, leading to SRA (specific absorption rate) exceeding a specific limit in that direction and causing radiation damage to human body, resulting in the data card antenna being disqualified.

Description

Data card antenna and data card technical field

The present invention relates to the field of communications, and in particular, to a data card antenna and a data card. Background technique

With the popularization of mobile terminals such as notebook computers and mobile phones and the rapid increase of data transmission speed of mobile networks, data cards for wireless Internet access have been more and more widely used due to their convenience. At the same time, with the growth of users' own needs and the differences in network standards and frequency bands between mobile operators, the development of a new product requires more and more compatible performance, and the data card is getting smaller and smaller. When using mobile terminals, The distance between the data card and the human body is getting smaller and smaller, and the possible radiation damage of the data card to the human body will increase accordingly. The indicator for measuring the degree of damage is SAR (Specific Absorption Rate). In the indicator test, the data card needs to be measured around the perimeter. If there is any radiation in any direction, the SAR of the data card does not meet the indicator. This requires the antenna to be omnidirectional, which is virtually impossible.

In the traditional data card antenna design, there is such a contradiction in itself: When the transmit power TRP (TRP-Total Radiation Power) is too high, the SAR will exceed the standard, and in the case of SAR compliance, the transmit power TRP is often Low, the two are almost impossible to balance. At present, in the data card antenna design, the antenna is only disposed on the data card main board, and the radiation is mainly concentrated on the surface on which the antenna is disposed. Therefore, in order to achieve the preset transmission power TRP, the SAR on the surface tends to exceed the standard. In order to reduce the SAR on this surface, it often affects its TRP. In order to solve this problem, it is more common to reduce the cable power as much as possible to reduce the antenna efficiency, or to attach the absorbing material, but it also deteriorates the antenna TRP, affecting the performance of the antenna, and still cannot effectively solve the antenna TRP. A problem that is balanced between SAR and SAR. Summary of the invention

The main technical problem to be solved by the present invention is to provide a data card antenna and a data card that can ensure that the antenna transmit power TRP reaches a preset value while ensuring that the SAR of the antenna does not exceed the standard in all directions.

In order to solve the above technical problem, the present invention provides a data card antenna, including an antenna carrier and a high frequency antenna disposed on a main board of the data card, wherein the high frequency antenna is connected to a signal line on the main board of the data card, the antenna The carrier is provided with a low frequency antenna that cooperates with the high frequency antenna, and the low frequency antenna is connected to the ground of the data card main board.

In an embodiment of the present invention, the antenna carrier includes a cavity, a portion of the data card main board on which the high frequency antenna is disposed is disposed in the cavity, and the low frequency antenna is disposed in the The cavity wall of the cavity, and spatially distributed, surrounds the high frequency antenna placed within the cavity.

In an embodiment of the present invention, the low frequency antenna includes an extended grounding portion and a low frequency extending wiring portion connected to each other, and the extended grounding portion is from a grounding point on the data card main board to A trace between the upper and lower main cavity walls of the cavity opposite to the data card main board.

In an embodiment of the invention, the high frequency antenna is symmetrically routed on the data card main board.

In an embodiment of the invention, the extended ground lines on the upper and lower sides of the data card main board are symmetrically arranged.

In one embodiment of the invention, the low frequency antenna is disposed on an outer surface of the cavity wall.

In an embodiment of the invention, the trace of the extended trace portion is a microstrip line. In an embodiment of the invention, the trace line width of the extended trace portion is set to a maximum width that can be reached within a database motherboard size limit. In an embodiment of the invention, the antenna carrier is an insulated antenna carrier.

The present invention also provides a data card comprising the data card antenna as described above.

The beneficial effects of the present invention are: The data card antenna of the present invention comprises an antenna carrier and a high frequency antenna disposed on the main board of the data card, the high frequency antenna is connected with the signal line on the main board of the data card, and the antenna carrier is provided with a high frequency antenna The matching end is provided with a low frequency antenna, and the low frequency antenna on the antenna carrier is connected to the ground of the data card main board, and the low frequency antenna connected to the ground of the data card main board can change the ground environment of the main board, thereby causing high frequency on the data card main board. The change of the radiation direction of the antenna causes the radiation of the high-frequency antenna to be dispersed in all directions as much as possible, so as to prevent the radiation of the high-frequency antenna from being concentrated in a certain direction, so that the SAR in the direction exceeds the standard and causes radiation damage to the human body. Therefore, the data card antenna of the present invention can ensure the antenna transmit power TRP, and the antenna radiation can be dispersed in all directions as much as possible, so as to ensure that the SAR of each direction of the data card antenna is within the index range as much as possible, so that it conforms to the corresponding SAR test indicators, which in turn improve the pass rate of data card antenna and data card production. DRAWINGS

1 is a structural diagram of a data card according to an embodiment of the present invention;

2 is a schematic structural view of a data card antenna portion of the data card of FIG. 1. detailed description

The present invention provides that the radiation direction of the existing data card antenna is not comprehensive, mainly concentrated in one or several directions, which causes the SAR to easily exceed the standard in the direction, thereby causing unqualified detection and possible radiation damage to the human body. A new data card antenna, which changes the radiation direction of the high frequency antenna on the data card main board by pulling out the low frequency antenna at the grounding point of the data card main board, so that the radiation of the high frequency antenna is directed in all directions as much as possible Disperse, so that the SAR in all directions is within the range of the test index, avoiding the radiation that concentrates in a certain direction to cause physical damage to the user, and also improves the data card antenna and the data card with the data card antenna. Production pass rate. The present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 and FIG. 2, the data card in this example includes a data card antenna, and the data card antenna further includes a data card main board 1 and an antenna carrier 2 at one end of the data card main board 1 (in this example, the data card main board 1) The left end) is provided with a connection interface 3 for connecting a terminal such as a computer or a mobile phone. In this example, the connection interface 3 can be a USB interface, and the other end of the data card main board 1 (in this example, the right end of the data card main board 1) is provided with The high frequency antenna 11 connected to the signal line on the main board 1 of the data card, wherein the high frequency antenna 11 is disposed in the clearance area of the data card main board, and correspondingly disposed at the right end of the antenna carrier is matched with the high frequency antenna 11 at the right end of the data card. The low frequency antenna 21 and the low frequency antenna 21 are connected to a ground point on the data card main board 1. Since the low frequency antenna 21 is connected to the data card main board 1, the ground environment of the data card main board 1 can be changed, thereby causing a change in the radiation direction of the high frequency antenna 11 on the data card main board 1, so that the radiation of the high frequency antenna 11 is exhausted. It may be dispersed in all directions to prevent the radiation of the high-frequency antenna from being concentrated in a certain direction, so that the SAR in this direction exceeds the standard and causes radiation damage to the human body.

The antenna carrier 2 in this example has a cavity in which the portion of the data card main board 1 provided with the high frequency antenna 11 is placed, and the cavity wall of the cavity in this example includes the respective side walls of the cavity (in this example There are four side walls) and a bottom wall 23 at the bottom of the cavity, and the shape of the cavity can match the shape of the cross section of the data card main board 1. A low frequency antenna 21 is disposed on the cavity wall of the cavity of the antenna carrier 2, and the low frequency antenna 21 disposed on the cavity wall is spatially distributed to surround the high frequency antenna shape 11 disposed in the cavity, so that the low frequency antenna 21 is paired The high frequency antenna 11 is formed to be enveloped so that the radiation of the high frequency antenna 11 is more omnidirectional, thereby preventing the high frequency antenna 11 from being concentrated in a certain direction.

The high frequency antenna 21 in this example is symmetrically routed in the clearance area of the data card main board 1, and the signal line pad 12 connected to the signal line on the data card main board 1 is located in the middle of the width direction of the clear area of the data card main board 1. The high frequency antenna 11 is connected to the signal line on the data card main board 1 through the signal line pad 12.

The data card main board 1 in this example is provided with the surface of the high frequency antenna 11 and the cavity of the antenna carrier 2. The upper and lower sidewalls of the pair are the main cavity walls of the antenna carrier, and the low-frequency antenna 21 includes the extended routing portion and the low-frequency extended routing portion, and the extended routing portion is from the grounding point of the data card main board 1 to the cavity and the data card respectively. The trace 22 between the upper and lower main wall of the main board 1 is 22, that is, 22 is an extended trace. In this example, the extended trace 22 is a microstrip line, and the trace width is set to be the size of the database board 1 (Mainly the length and width of the data card motherboard) The maximum width that can be reached within the limits is optimal. The low frequency extension trace portion is the low frequency antenna 21 that removes the remaining portions of the extended trace portion. In this example, the extended grounding line 22 of the upper and lower sides of the data card main board 1 is symmetrically arranged, and the extended grounding line 22 is a key part for changing the radiation direction of the high frequency antenna 11, and its main function is to change the ground environment of the data card main board. Further, the radiation direction of the high frequency antenna 11 is changed. The main function of the low-frequency extension trace is to achieve low-frequency radiation of the antenna to make it more omnidirectional.

The low frequency antenna 21 in this example can be disposed on the inner surface or the inner surface of the antenna carrier cavity wall. In this example, the antenna carrier 2 can also be the data card housing of the data card, that is, the low frequency antenna 21 can be directly disposed in the data card card housing. On the inner or outer surface of the side walls and the bottom. The traces of the low frequency antenna 21 on the wall of the cavity may be symmetrically arranged or asymmetrically arranged, and the different trace widths and positions of the traces have different effects on the high frequency antenna 11, and the specific trace width and the trace position are actually according to actual conditions. Debugging the situation, so that the radiation of the high-frequency antenna 11 is as omnidirectional as possible, so that the SAR values in all directions are within the test index as much as possible, reducing the radiation damage to the human body and improving the production of the data card and the data card antenna. rate.

It is to be understood that the specific embodiments of the invention are limited only by the description. It is to be understood by those skilled in the art that the present invention may be practiced without departing from the spirit and scope of the invention.

Claims

Claim

A data card antenna, comprising: an antenna carrier and a high frequency antenna disposed on a main board of the data card, wherein the high frequency antenna is connected to a signal line on the main board of the data card, and the antenna carrier is provided There is a low frequency antenna cooperating with the high frequency antenna, and the low frequency antenna is connected to the ground of the data card main board.

2. The data card antenna according to claim 1, wherein the antenna carrier comprises a cavity, and a portion of the data card main board on which the high frequency antenna is disposed is placed in the cavity. The low frequency antenna is disposed on a cavity wall of the cavity and is circumferentially distributed to surround the high frequency antenna disposed within the cavity.

3. The data card antenna according to claim 2, wherein the low frequency antenna comprises an extended ground line portion and a low frequency extension line portion connected to each other, and the extended ground line portion is from the data card The grounding points on the main board are respectively routed to the upper and lower main cavity walls of the cavity opposite to the data card main board.

4. The data card antenna of claim 2, wherein the high frequency antenna is symmetrically routed on the data card main board.

The data card antenna according to claim 3, wherein the extended ground lines on the upper and lower sides of the data card main board are symmetrically arranged.

The data card antenna according to any one of claims 2 to 5, wherein the low frequency antenna is disposed on an outer surface of the cavity wall.

The data card antenna according to any one of claims 3 to 5, wherein the trace of the extended trace portion is a microstrip line.

The data card antenna according to any one of claims 3-5, wherein the line width of the extended ground portion is set to a maximum width that can be achieved within a database motherboard size limit.

The data card antenna according to any one of claims 1 to 5, wherein the antenna The carrier is an insulated antenna carrier.

A data card, comprising the data card antenna of any of claims 1-9.