CN110708080A - Communication device - Google Patents

Abstract

The present invention discloses a communication device including multiple antennas, a sensing unit, multiple radio frequency circuits and a sensing module. The sensing unit is electrically connected to a ground terminal through at least one grounding capacitor, and the sensing unit is also used to couple and isolate each antenna; each radio frequency circuit in the multiple radio frequency circuits is electrically connected to each corresponding antenna, and the multiple radio frequency circuits are used to generate radio frequency signals; and the sensing module is electrically connected to the sensing unit through an inductor, and the sensing module is used to sense the distance between the sensing unit and an external object through the sensing unit, and generate a distance signal according to the distance.

Description

communication device

technical field

The present invention relates to a communication device, in particular to a communication device having a plurality of antennas in the same frequency band or different frequency bands.

Background technique

Generally speaking, in order to cope with various wireless transmission specifications and MIMO (Multiple Input and Multiple Output) technologies that will be developed at present and in the future, multiple sets of antennas of the same frequency or different frequency bands are usually installed in electronic products with communication functions to cover the same or different frequency bands. Different frequency bands, so as to meet the specifications of various communication protocols or the requirements of MIMO technology. However, when installing multiple groups of antennas in the same frequency band or in different frequency bands in communication electronic products with limited space, isolation must be done so that the communication function of each group of antennas will not be affected due to mutual interference.

On the other hand, when using an antenna for wireless transmission, a large amount of electromagnetic waves will be generated, which will affect the human body. Therefore, communication electronic products must undergo a specific adsorption rate (SAR) test. Specifically, the method in the prior art is to Each group of antennas is matched with a group of induction devices, and when the induction device senses the approach of a human body, the output power of each group of antenna signals is reduced to pass the SAR test.

In the prior art, the isolation devices and multiple sets of sensing devices installed to solve the above problems will make the limited space in the communication electronic product more stretched and increase the design difficulty. Therefore, how to provide a communication device that can properly isolate multiple groups of antennas in the same frequency band or different frequency bands and sense the proximity of a human body in a limited space has become an urgent issue to be solved in the industry.

SUMMARY OF THE INVENTION

In view of various deficiencies in the prior art, an object of the present invention is to provide a communication device that can properly isolate multiple groups of antennas in the same frequency band or different frequency bands and sense the proximity of a human body in a limited space.

In order to achieve the above objects, the communication device of the present invention includes a plurality of antennas, a sensing unit, a plurality of radio frequency circuits and a sensing module.

The sensing unit is electrically connected to the ground terminal through at least one grounding capacitor, and the sensing unit is also used for coupling and isolating each antenna; each radio frequency circuit in the plurality of radio frequency circuits is electrically connected to the corresponding each antenna, and the plurality of radio frequency circuits The circuit is used for generating a radio frequency signal; and the sensing module is electrically connected to the sensing unit through an inductor, the sensing module is used for sensing the distance between the sensing unit and an external object through the sensing unit, and the distance is generated according to the spacing distance Signal.

In one embodiment, the plurality of antennas are monopole antennas or PIFA antennas.

In one embodiment, the sensing unit includes a first part and at least a second part. The first part is coupled with the plurality of antennas; and at least one second part is electrically connected with the first part and used for coupling and isolating the plurality of antennas.

In one embodiment, each of the second parts is electrically connected to the ground terminal through a corresponding ground capacitor.

In one embodiment, at least one second portion is disposed between the plurality of antennas.

In one embodiment, the communication device further includes a control module electrically connected to the sensing module and the plurality of radio frequency circuits, and the control module is used for receiving the distance signal and sending the control signal to control the plurality of radio frequency circuits.

In one embodiment, the control module is used to determine the separation distance between the sensing unit and the external object through the distance signal. When the separation distance is less than a threshold value, the control module sends a power control signal to a plurality of radio frequency circuits to reduce the output power of the radio frequency signal. .

In one embodiment, each radio frequency circuit is further electrically connected to each corresponding antenna through a connection capacitor.

Specifically, the sensing unit of the communication device of the present invention is coupled with a plurality of antennas and can be used as a part of antenna communication; the sensing unit is also electrically connected to the ground terminal through at least one grounding capacitor, so that the distance between the antennas can be improved. and the sensing unit and the sensing module electrically connected through an inductance can be used to sense the distance between the sensing unit and the external object. In other words, the sensing unit has multiple functions and corresponds to multiple antennas, thus greatly reducing the number of components required in the prior art and saving limited space, and fully solving the problems of the prior art. In addition, the communication device of the present invention can be further equipped with a control module for receiving the distance signal and sending the control signal to control the plurality of radio frequency circuits, and reduce the output power of the radio frequency signals of the plurality of radio frequency circuits according to the separation distance, Thus, the SAR test can be passed.

Description of drawings

FIG. 1 is a schematic structural diagram of a communication apparatus according to a first embodiment of the present invention.

FIG. 2a is a schematic structural diagram of a communication apparatus according to a second embodiment of the present invention.

FIG. 2b is a schematic diagram of a three-dimensional architecture of a communication device according to a second embodiment of the present invention.

FIG. 3a is a schematic structural diagram of a communication apparatus according to a third embodiment of the present invention.

FIG. 3b is a schematic diagram of a three-dimensional architecture of a communication device according to a third embodiment of the present invention.

FIG. 4a is a schematic structural diagram of a communication apparatus according to a fourth embodiment of the present invention.

FIG. 4b is a schematic diagram of a three-dimensional architecture of a communication device according to a fourth embodiment of the present invention.

FIG. 5 is a schematic structural diagram of a communication apparatus according to a fifth embodiment of the present invention.

Symbol Description:

1a, 1b, 1c Antennas

2 Sensing unit

21 Part 1

22 Part II

22a, 22b Part II

3a, 3b, 3c RF circuits

4 Sensing module

5 Control Module

C1 Ground Capacitor

C1a, C1b ground capacitance

C2a, C2b connection capacitor

L Inductance

Detailed ways

The embodiments of the present invention are described below by means of specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied by other different specific embodiments.

As used herein, "coupled" may mean that two or more components are in direct physical or electrical contact with each other, or are in indirect physical or electrical contact with each other, and "coupled" may also mean that two or more components are in physical or electrical contact with each other An operation or action (not limited to physical or electrical contact).

Please refer to FIG. 1 , which is a schematic structural diagram of a communication device according to a first embodiment of the present invention. As shown in the figure, the communication device of the present invention includes a plurality of antennas 1 a and 1 b , a sensing unit 2 , a plurality of radio frequency circuits 3 a and 3 b and a sensing module 4 . The communication device of the present invention can be used in electronic products with communication functions, such as mobile phones, tablet computers, wireless access point devices, and the like.

In the embodiment of FIG. 1, two antennas 1a, 1b are used as an example, but in other embodiments, there may be more antennas. The sensing unit 2 is electrically connected to the ground terminal through at least one grounding capacitor C1, and the sensing unit 2 is also used for coupling and isolating the respective antennas 1a and 1b. For example, the sensing unit 2 can be arranged on the antennas 1a and 1b. And because the sensing unit 2 is electrically connected to the ground terminal through the ground capacitor C1, it has an isolation effect, which can avoid or reduce the mutual interference between the antenna 1a and the antenna 1b, which is helpful to set up multiple groups of antennas in a limited space .

In this embodiment, the radio frequency circuit 3a is electrically connected to the corresponding antenna 1a; the radio frequency circuit 3b is electrically connected to the corresponding antenna 1b, wherein a plurality of radio frequency circuits 3a, 3b are used to generate radio frequency signals, and can pass through a plurality of radio frequency circuits 3a and 3b. The antennas 1a, 1b transmit the radio frequency signals. For example, the radio frequency circuit 3a generates a first radio frequency signal and sends it to the antenna 1a, and the antenna 1a transmits the first radio frequency signal; and the radio frequency circuit 3b generates a second radio frequency signal and sends it to the antenna 1b. In addition, the plurality of antennas 1a, 1b may be antennas operating in the same or different frequency bands, such as high frequency band, low frequency band or specific frequency band (such as Longterm Evolution (LTE)), but not limited thereto.

The sensing module 4 is electrically connected to the sensing unit 2 through an inductance L, and the sensing module 4 is used to sense the distance between the sensing unit 2 and an external object through the sensing unit 2, and generate a distance signal according to the distance. For example, the external object can be a human body. When a human body approaches, a parasitic capacitance will be induced with the sensing unit 2, so that the number of charges and discharges per second of the capacitive sensor in the sensing module 4 changes, thereby sensing The distance between the sensing unit 2 and the human body is calculated.

Please refer to FIGS. 2a and 2b. FIG. 2a is a schematic structural diagram of a communication apparatus according to a second embodiment of the present invention, and FIG. 2b is a three-dimensional structural schematic diagram of the communication apparatus according to the second embodiment of the present invention. In the embodiment of FIG. 2a, two antennas 1a, 1b are taken as an example, and they correspond to the radio frequency circuits 3a, 3b respectively. In one embodiment, the plurality of antennas 1a, 1b can be monopole antennas 1b or PIFA (Planar Inverted-F Antenna, Planar Inverted-F Antenna) antennas 1a, but not limited to this, it can be determined according to practical applications. The desired frequency band to change the antenna design (eg for WIFI or LTE). In addition, multiple antennas of the same form may be used or multiple antennas of different forms may be mixed. When the PIFA antenna is used, it can also be electrically connected to the ground terminal by connecting a capacitor in series.

Further, as shown in FIG. 2b, the plurality of antennas may also be in a three-dimensional structure. For example, when the communication device of the present invention is applied to a mobile phone or other electronic products, a plurality of antennas (eg, antenna 1a) can be partially extended on the side casing to form a three-dimensional structure.

Referring to FIG. 2 a , in one embodiment, the sensing unit 2 may include a first part 21 and at least one second part 22 . The first part 21 is coupled to the plurality of antennas 1a, 1b; and at least one second part 22 is electrically connected to the first part 21, and is used for coupling and isolating the plurality of antennas 1a, 1b. For example, the first part 21 can be designed as a strip-type structure, and is spanned across and coupled with the plurality of antennas 1a, 1b; and the second part 22 can be designed as a strip-type structure electrically connected to the first part 21, and the number of The number of antennas can be reduced by one and arranged between the plurality of antennas 1a, 1b. In this embodiment, the first part 21 and the second part 22 are not in physical or electrical contact with the plurality of antennas 1a, 1b, but not limited to this. In other embodiments, the first part 21 and the second part The portion 22 may also be in physical or electrical contact with some or all of the plurality of antennas 1a, 1b.

In one embodiment, the second portion 22 is electrically connected to the ground terminal through the corresponding ground capacitor C1. In addition, the sensing module 4 is electrically connected to the second part 22 through the inductance L.

Please refer to FIG. 3a and FIG. 3b. FIG. 3a is a schematic diagram of a structure of a communication device according to a third embodiment of the present invention, and FIG. 3b is a schematic diagram of a three-dimensional structure of the communication device according to the third embodiment of the present invention. In the embodiment of FIG. 3a, two antennas 1a and 1b are used as an example, and the antennas 1a and 1b may be PIFA antennas. In this embodiment, the first part 21 is in physical or electrical contact with the antenna 1a, and the second part 22 is in physical or electrical contact with the antenna 1b, but not limited to this. In other embodiments, the first part 21 and the second part 22 may be in a mutually operative or operational relationship with some or all of the plurality of antennas 1a and 1b.

Furthermore, as shown in FIG. 3b, the plurality of antennas may also be in a three-dimensional structure. For example, when the communication device of the present invention is applied to a mobile phone or other electronic products, a plurality of antennas (eg, antennas 1a, 1b) can be partially extended on the side casing to form a three-dimensional structure.

Please refer to FIG. 4a and FIG. 4b. FIG. 4a is a schematic diagram of a structure of a communication device according to a fourth embodiment of the present invention, and FIG. 4b is a schematic diagram of a three-dimensional structure of the communication device according to the fourth embodiment of the present invention. In the embodiment of FIG. 4a, three antennas 1a, 1b, 1c are taken as an example, and they correspond to the radio frequency circuits 3a, 3b, 3c respectively. Antenna 1a may be a monopole antenna, and antennas 1b, 1c may be PIFA antennas. In other embodiments, there may be more antennas and the antenna patterns may be arranged differently.

In the embodiment of FIG. 4a and FIG. 4b, the first part 21 can be designed as a strip-shaped structure, and is spanned across and coupled with the plurality of antennas 1a, 1b, and 1c. Corresponding to the three antennas 1 a , 1 b and 1 c , this embodiment has two second portions 22 a and 22 b, which are elongated structures electrically connected to the first portion 21 . The second portion 22a is arranged between the antennas 1a, 1b, and the second portion 22b is arranged between the antennas 1b, 1c.

In this embodiment, the second portion 22a is electrically connected to the ground terminal through the corresponding ground capacitor C1a, and the second portion 22b is electrically connected to the ground terminal through the corresponding ground capacitor C1b. In addition, the sensing module 4 is electrically connected to the second part 22b through the inductance L, but is not limited to this, and can be optionally connected to the second part 22a.

Please refer to FIG. 5 , which is a schematic structural diagram of a communication device according to a fifth embodiment of the present invention. In one embodiment, the communication device of the present invention may further include a control module 5, which is electrically connected to the sensing module 4 and the plurality of radio frequency circuits 3a, 3b, and the control module 5 is used for receiving distance signals and sending control signals to control the plurality of radio frequency circuits 3a and 3b. A radio frequency circuit 3a, 3b. For example, the control module 5 can control the frequency band or output power of the radio frequency signals of the plurality of radio frequency circuits 3a and 3b through the control signal. In other embodiments, the control module 5 may also control the on/off of the mobile phone screen or the switching of the switch according to the distance signal.

In one embodiment, the control module 5 can be used to determine the separation distance between the sensing unit 2 and the external object through the distance signal, and when the separation distance is less than a threshold value, the control module 5 sends a power control signal to the plurality of radio frequency circuits 3a, 3b to Reduce the output power of the RF signal. For example, the threshold value may be 5cm-10cm, but not limited thereto. When an external object (such as a human body) approaches and the distance between the sensing unit 2 and the external object is less than a threshold value, the control module 5 instructs the plurality of radio frequency circuits 3a, 3b to reduce the output power of the radio frequency signal, and the plurality of antennas 1a, 1b The radiated power will also be reduced, and the degree of reduction can be adjusted to meet the SAR value specification to avoid harming the human body.

Further, if multiple antennas 1a and 1b are arranged in a limited space and are very close to each other (for example, less than 5cm), the detection of the Co-location SAR value will also be performed, that is, detection is performed for all antennas 1a and 1b. At this time, the reduction degree of the output power of the radio frequency signal can also be further adjusted, and the radio frequency circuit 3a and the radio frequency circuit 3b can reduce the output power to different degrees respectively. In addition, multiple threshold values can also be set to form multiple intervals, so that when the distance between the sensing unit 2 and the external object is in different intervals, the reduction degree of the output power of the radio frequency signal is also different, depending on the distance from far to near. The output power of the RF signal is from high to low.

In one embodiment, the radio frequency circuit 3a can also be electrically connected to the corresponding antenna 1a through the connection capacitor C2a; and the radio frequency circuit 3b can also be electrically connected to the corresponding antenna 1b through the connection capacitor C2b to filter low frequency signals.

In one embodiment, the radio frequency circuit, the sensing module or the control module may be implemented by an IC chip or a PCB circuit.

To sum up, the sensing unit of the communication device of the present invention is coupled with a plurality of antennas and can be used as a part of the antenna communication; the sensing unit is also electrically connected to the ground terminal through at least one grounding capacitor, so that each antenna can be improved. The isolation degree between them; and the sensing unit and the sensing module electrically connected through an inductance can be used to sense the distance between the sensing unit and the external object. In other words, the sensing unit has multiple functions and corresponds to multiple antennas, thus greatly reducing the number of components required in the prior art and saving limited space, and fully solving the problems of the prior art. In addition, the communication device of the present invention can be further equipped with a control module for receiving the distance signal and sending the control signal to control the plurality of radio frequency circuits, and reduce the output power of the radio frequency signals of the plurality of radio frequency circuits according to the separation distance, Thus, the SAR test can be passed.

From the description of the above preferred specific embodiments, those with ordinary knowledge in the art can be more clear about the characteristics and spirit of the present invention, but the above-mentioned embodiments are only used to illustrate the principles and effects of the present invention, but not to limit the present invention. . Therefore, any modifications and changes made to the above embodiments still do not depart from the spirit of the present invention, and the scope of the rights of the present invention should be listed in the claims.

Claims (9)

1. A communication device, characterized in that the communication device comprises: multiple antennas; The sensing unit is electrically connected to the ground terminal through at least one grounding capacitor, and the sensing unit is also used for coupling and isolating each antenna; a plurality of radio frequency circuits, each of which is electrically connected to each corresponding antenna, and the plurality of radio frequency circuits are used to generate radio frequency signals; and The sensing module is electrically connected to the sensing unit through an inductor, and the sensing module is used for sensing the distance between the sensing unit and an external object through the sensing unit, and according to the spacing Distance produces a distance signal. 2. The communication device according to claim 1, wherein the plurality of antennas are monopole antennas or PIFA antennas. 3 . The communication device of claim 2 , wherein when the plurality of antennas are PIFA antennas, each PIFA antenna is electrically connected to the ground terminal by connecting a capacitor in series. 4 . 4. The communication device of claim 1, wherein the sensing unit comprises: a first portion coupled to the plurality of antennas; and At least one second part is electrically connected to the first part and used for coupling and isolating the plurality of antennas. 5 . The communication device according to claim 4 , wherein each second part is electrically connected to the ground terminal through the corresponding ground capacitor. 6 . 6. The communication device of claim 4, wherein the at least one second portion is disposed between the plurality of antennas. 7 . The communication device according to claim 1 , wherein the communication device further comprises a control module, which is electrically connected to the sensing module and the plurality of radio frequency circuits, and the control module is configured to receive the received signals. 8 . the distance signal and sending a control signal to control the plurality of radio frequency circuits. 8 . The communication device according to claim 7 , wherein the control module is used to judge the separation distance between the sensing unit and the external object through the distance signal, when the separation distance is less than a threshold. 9 . When the value is set, the control module sends a power control signal to the plurality of radio frequency circuits to reduce the output power of the radio frequency signal. 9 . The communication device of claim 1 , wherein each radio frequency circuit is further electrically connected to each corresponding antenna through a connecting capacitor. 10 .

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