CN213305767U

CN213305767U - Control circuit of radio frequency power and electronic equipment

Info

Publication number: CN213305767U
Application number: CN202022204448.9U
Authority: CN
Inventors: 何波
Original assignee: Shanghai Wentai Information Technology Co Ltd
Current assignee: Shanghai Wentai Information Technology Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-05-28
Anticipated expiration: 2030-09-30

Abstract

The utility model provides a control circuit of radio frequency power, which comprises a near field communication module, a sensing module and a radio frequency module; the near field communication module is connected with one end of the sensing module, the other end of the sensing module is connected with the radio frequency module, and the sensing module is used for sensing the capacity value change of the near field communication module; when the capacity value change is larger than or equal to a preset threshold value, the sensing module controls the radio frequency module to improve power output; and when the capacity value change is smaller than the preset threshold value, the sensing module controls the radio frequency module to reduce power output. The utility model also provides an electronic equipment. The utility model provides a radio frequency power's control circuit and electronic equipment can satisfy first hand capability test's index requirement, and has reduced the radio frequency consumption, has prolonged electronic equipment's live time.

Description

Control circuit of radio frequency power and electronic equipment

[ technical field ] A method for producing a semiconductor device

The utility model relates to a radio frequency technology field especially relates to a radio frequency power's control circuit and electronic equipment.

[ background of the invention ]

At present, The antenna environment of electronic equipment (such as a mobile phone) is increasingly poor, The antenna radiation efficiency is also poor, and in order to ensure good call quality and meet The test index of an antenna OTA (Over The Air technology), The requirement of The antenna on The output radio frequency power is increasingly high.

Generally, the antenna OTA test includes a free space performance test and a head and hand performance test, in which the head and hand performance test is to put the mobile phone into a hand touch and close to a head die to simulate a call scene when a user holds the mobile phone. During actual test, the power of a plurality of radio frequency bands can meet the index of free space performance test, but cannot meet the index of head-to-hand performance test. Therefore, in order to meet the index of the first-hand performance test, the radio frequency power needs to be increased, so that the electronic equipment is in a high radio frequency power state for a long time, the radio frequency power consumption is high, and the service time of the electronic equipment is shortened.

Therefore, there is a need to provide a novel rf power control circuit and electronic device to overcome the above-mentioned drawbacks.

[ Utility model ] content

The utility model aims at providing a radio frequency power's control circuit and electronic equipment can satisfy first hand capability test's index requirement, and has reduced the radio frequency consumption, has prolonged electronic equipment's live time.

In order to achieve the above object, in a first aspect, the present invention provides a control circuit for radio frequency power, including a near field communication module, a sensing module and a radio frequency module; the near field communication module is connected with one end of the sensing module, the other end of the sensing module is connected with the radio frequency module, and the sensing module is used for sensing the capacity value change of the near field communication module; when the capacity value change is larger than or equal to a preset threshold value, the sensing module controls the radio frequency module to improve power output; and when the capacity value change is smaller than the preset threshold value, the sensing module controls the radio frequency module to reduce power output.

In a preferred embodiment, the near field communication module comprises an NFC antenna comprising a ground pin.

In a preferred embodiment, the sensing module is a SAR sensing chip, and the SAR sensing chip is connected to the grounding pin.

In a preferred embodiment, the rf module is an rf chip, and the rf chip is further connected to a transmitting antenna.

In a second aspect, the present invention further provides an electronic device, including the control circuit of the radio frequency power according to any one of the above embodiments.

Compared with the prior art, the utility model provides a radio frequency power's control circuit and electronic equipment, the appearance value according to the near field communication module of sensing module sensing changes, control radio frequency module's power output, realized when carrying out first hand capability test, control radio frequency module is with higher power output, and when carrying out the free space test, control radio frequency module is with lower power output, and then make electronic equipment both can satisfy the index requirement of free space capability test, can satisfy first hand capability test's index requirement again, can also let electronic equipment be in low power emission state at most time, the radio frequency power consumption has been reduced, electronic equipment's live time has been prolonged.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic block diagram of a control circuit for rf power provided by the present invention;

fig. 2 is a circuit diagram of a control circuit of the rf power provided by the present invention;

fig. 3 is a schematic structural diagram of the electronic device provided by the present invention.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a control circuit 100 for rf power, which includes a near field communication module 10, a sensing module 20 and an rf module 30.

The near field communication module 10 is connected to one end of the sensing module 20, the other end of the sensing module 20 is connected to the radio frequency module 30, and the sensing module 20 is used for sensing the capacitance value change of the near field communication module 10; when the capacity value variation is greater than or equal to a preset threshold value, the sensing module 20 controls the radio frequency module 30 to increase power output; when the capacity value variation is smaller than the preset threshold, the sensing module 20 controls the rf module 30 to reduce power output.

It can be understood that, when the performance of the head and hand is tested, since the hand touches the near field communication module 10, the circuit of the near field communication module 10 changes in capacitance value, and a preset threshold value for the change in capacitance value is set in the sensing module 20, and when the preset threshold value is reached or exceeded, the sensing module 20 is triggered to control the radio frequency module 30 to increase the power output, so as to meet the index of the performance test of the head and hand. When the free space performance test is performed, that is, the hand touch is not close to the near field communication module 10, and the change of the capacitance value of the near field communication module 10 is smaller than the preset threshold value, the sensing module 20 controls the radio frequency module 30 to reduce the power output, and the lower power output can meet the index of the free space performance test.

Therefore, the utility model provides a radio frequency power's control circuit 100, the appearance value according to the near field communication module 10 of sensing module 20 sensing changes, control radio frequency module 30's power output, realized when carrying out first hand capability test, control radio frequency module 30 is with higher power output, and when carrying out the free space test, control radio frequency module 30 is with lower power output, and then make electronic equipment both can satisfy the index requirement of free space capability test, can satisfy first hand capability test's index requirement again, can also let electronic equipment be in low power transmission state at most time, the radio frequency power consumption has been reduced, electronic equipment's live time has been prolonged.

Referring to fig. 2, in the present embodiment, the NFC module 10 includes an NFC antenna T, and the NFC antenna T includes a ground pin GND, and specifically, the NFC antenna T further includes a FEED pin fed. It is understood that when a hand is brought close to the NFC antenna, the capacitance value on the NFC antenna circuit changes.

Further, the sensing module 20 is an SAR (Specific Absorption Rate) sensing chip U, and the SAR sensing chip U is connected to the ground pin GND. It can be understood that the SAR sensing chip U is a sensor for detecting the state of the antenna of the mobile phone, and the SAR sensing chip U is connected to the ground pin GND on the NFC antenna circuit, i.e., can sense the capacitance value change on the NFC antenna circuit.

Specifically, the rf module 30 is a rf chip S, the rf chip S is further connected to a transmitting antenna T0, and the rf chip S transmits rf power through the transmitting antenna T0.

The principle of the control circuit 100 for rf power shown in fig. 2 is as follows: when the first hand performance test is carried out, as the hand touch is close to the NFC antenna circuit, the capacitance value of the NFC antenna circuit changes, a preset threshold value of the capacitance value change is set in the SAR sensing chip U, and when the preset threshold value is reached or exceeded, the SAR sensing chip U is triggered to control the radio frequency chip S to call a set of high-power NV (non-volatile data) so as to improve the power output and further meet the index of the first hand performance test. When the free space performance test is carried out, namely a hand touch is not close to the NFC antenna circuit, the capacity value change of the NFC antenna circuit is smaller than the preset threshold value, the SAR sensing chip U controls the radio frequency chip S to call one set of low-power NV so as to reduce power output, and the lower power output can meet the index of the free space performance test. It can be understood that the amount of power emitted by the rf chip S is related to NV in the rf parameters, and each set of NV corresponds to a transmission power. In this embodiment, the SAR sensing chip U sends a control signal to the radio frequency chip S, and invokes different NVs to output different transmission powers. Specifically, the low power may be, for example, but is not limited to, 22 db; the high power may be, for example, but is not limited to, 24 db.

Referring to fig. 3, the present invention further provides an electronic device 200 including the rf power control circuit 100 described above. It is understood that the electronic device may be, but is not limited to, a portable terminal such as a mobile phone, the electronic device includes the NFC module 10, and when performing the head-hand performance test, the hand module can be close to the NFC module 10, and in particular, the NFC module may be located on the back of the electronic device. It should be noted that all embodiments of the control circuit 100 for rf power provided by the present invention are applicable to the electronic device 200 provided by the present invention, and all the embodiments can achieve the same or similar beneficial effects.

To sum up, the utility model provides a radio frequency power's control circuit 100 and electronic equipment 200, the appearance value according to the near field communication module 10 of sensing module 20 sensing changes, control radio frequency module 30's power output, realized when carrying out first hand capability test, control radio frequency module 30 is with higher power output, and when carrying out the free space test, control radio frequency module 30 is with lower power output, and then make electronic equipment both can satisfy the index requirement of free space capability test, can satisfy first hand capability test's index requirement again, can also let electronic equipment be in low-power transmission state at most time, the radio frequency consumption has been reduced, electronic equipment's live time has been prolonged.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A control circuit of radio frequency power is characterized by comprising a near field communication module, a sensing module and a radio frequency module; the near field communication module is connected with one end of the sensing module, the other end of the sensing module is connected with the radio frequency module, and the sensing module is used for sensing the capacity value change of the near field communication module; when the capacity value change is larger than or equal to a preset threshold value, the sensing module controls the radio frequency module to improve power output; and when the capacity value change is smaller than the preset threshold value, the sensing module controls the radio frequency module to reduce power output.

2. The control circuit of radio frequency power of claim 1, wherein the near field communication module comprises an NFC antenna including a ground pin.

3. The control circuit of radio frequency power according to claim 2, wherein the sensing module is a SAR sensing chip, the SAR sensing chip being connected to the ground pin.

4. The rf power control circuit of claim 3, wherein the rf module is an rf chip, and the rf chip is further connected to a transmitting antenna.

5. An electronic device comprising a control circuit for radio frequency power according to any of claims 1-4.