WO2018072764A1

WO2018072764A1 - Antenna control circuit and method

Info

Publication number: WO2018072764A1
Application number: PCT/CN2017/117056
Authority: WO
Inventors: 张瑜; 周洋; 田晓光; 张建华
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-10-21
Filing date: 2017-12-19
Publication date: 2018-04-26
Also published as: CN107979400A; CN107979400B

Abstract

Disclosed are an antenna control circuit and method, the circuit comprising: an antenna system, a charging circuit, a detecting circuit and a main control system, the antenna system comprising: a main antenna, a backup antenna and an antenna switching switch. The charging circuit is side-connected to the main antenna, and the detecting circuit comprises a charging power source, a charging power source switch and a detection circuit. The main control system instructs the charging power source, by controlling the charging power source switch to turn on, to charge the charging circuit, obtains a charging parameter detected by the detection circuit, determines an operating state of the main antenna according to the charging parameter and a preset determination policy, and upon determining that the operating state of the main antenna is abnormal, controls the antenna switching switch in the antenna system to switch the antenna connected to a radio frequency circuit from the main antenna to the backup antenna.

Description

Antenna control circuit and method

Technical field

The present invention relates to wireless communication technologies, and in particular, to an antenna control circuit and method.

Background technique

As an important part of the wireless communication channel, the RF antenna is the basic structure for wireless communication. With the development of communication technology, users' demand for data throughput of wireless communication is increasing. The RF antenna has also evolved from a single-antenna system to a complex multiple-input multiple-output (MIMO) antenna system. In order to ensure good communication quality, for a complex antenna system, each antenna must have good radiation characteristics. Any damage or abnormal connection of the antenna will affect the normal operation of the entire communication system, and may even bring the front-end RF. Damage to the link.

In order to ensure the normal operation of complex antenna systems such as MIMO antenna systems, and avoid communication failures in the entire communication system due to abnormal antenna connections or antenna damage, the antenna system will be detected, but when the antenna system fails. Will affect normal communication.

Summary of the invention

In order to solve the above technical problem, an embodiment of the present invention is directed to providing an antenna control circuit and method, which can still ensure a normal communication state when an abnormality occurs in an antenna connection state, thereby avoiding a situation in which communication cannot be normally performed due to an antenna failure.

The technical solution of the present invention is implemented as follows:

In a first aspect, an embodiment of the present invention provides an antenna control circuit, where the circuit includes: an antenna system, a charging circuit, a detecting circuit, and a main control system; wherein the antenna system includes: a primary antenna, a backup antenna, and Antenna switch

The charging circuit is adjacent to the main antenna;

The detection circuit includes a charging power source, a charging power switch, and a detection circuit;

The main control system is configured to instruct the charging power source to charge the charging circuit by controlling the charging power switch to be turned on;

And acquiring a charging parameter detected by the detection loop;

And determining, according to the charging parameter, an operating state of the primary antenna according to a preset determining policy;

And, when it is determined that the working state of the primary antenna is abnormal, controlling an antenna switching switch in the antenna system to switch an antenna connected to the radio frequency circuit from the primary antenna to the backup antenna.

In the above solution, the charging circuit is specifically implemented by a series inductance or a resistance of a capacitive device having a large capacitance value and grounding.

In the above solution, the main control system separately controls the antenna switching switch and the charging power switch through a universal input/output GPIO interface, and acquires the charging detected by the detecting circuit through an analog-digital converter ADC detecting interface. parameter.

In the above solution, the specific form of the detection circuit in the detecting circuit is a voltage dividing circuit, and the voltage dividing circuit includes a first port E connected to the charging power source and a second port B inputting a voltage to the charging circuit. And a third port D that is connected to the ADC detection interface of the main control system and outputs a charging voltage.

In the above solution, the main control system is specifically set as:

When it is detected that the voltage VD of the third port D is zero, determining that the main antenna is short-circuited;

Determining that the main antenna is open when it is detected that the VD is far greater than the terminal voltage when the charging circuit is normally charged;

When it is detected that the difference between the VD and the terminal voltage when the charging circuit is normally charged is within a preset range, it is determined that the primary antenna operates normally.

In the above solution, the main control system is specifically configured to: when detecting that the main antenna is short-circuited or open-circuited, control the antenna switch to switch the antenna connected to the radio frequency circuit from the main antenna to the Said spare antenna.

In the above solution, the main control system is specifically set as:

Setting a first charging time T1 and a second charging time T2 in a preset detection period T, where T>T2>T1;

And detecting, by the third port D, the voltage value V1 corresponding to the first charging time T1 and the voltage value V2 corresponding to the second charging time T2;

And, the working state of the main antenna is determined according to the relationship between V1 and V2.

In the above solution, the main control system is set to:

When the V2 is greater than the V1, it is determined that the primary antenna works normally; otherwise, it is determined that the active state of the primary antenna is abnormal.

In the above solution, the specific form of the detection circuit in the detecting circuit is a voltage dividing circuit, and the voltage dividing circuit includes: an input voltage port B2 that inputs a voltage to the charging circuit and an ADC detecting interface with the main control system. And outputting a charging voltage port D2 for outputting a charging voltage; wherein the input voltage port B2 is connected to a charging access point of the capacitor in the charging circuit.

In the above solution, the main control system is set to:

When it is detected that the voltage VD of the output charging voltage port D2 is zero, determining that the main antenna is open;

When it is detected that the VD is far greater than the terminal voltage when the charging circuit is normally charged, it is determined that the primary antenna is short-circuited;

In a second aspect, an embodiment of the present invention provides an antenna control method, where the method is applied to an antenna control circuit, where the antenna control circuit includes an antenna system, a charging circuit, a detecting circuit, and a main control system; wherein the antenna The system includes: a main antenna, a backup antenna, and an antenna switch; the charging circuit is connected to the main antenna; the detecting circuit includes a charging power source, a charging power switch, and a detecting circuit; after the charging power switch is turned on, The charging power source charges the charging circuit, and the detecting circuit detects a charging parameter of the charging circuit during charging; the method includes:

The main control system instructs the charging power source to charge the charging circuit by controlling the opening of the charging power switch;

The main control system acquires a charging parameter detected by the detection loop;

Determining, by the main control system, an operating state of the active antenna according to the preset determining policy according to the charging parameter;

When the main control system determines that the working state of the main antenna is abnormal, the main control system controls an antenna switching switch in the antenna system to switch an antenna connected to the radio frequency circuit from the main antenna to the Spare antenna.

In the above solution, the main control system controls the antenna switching switch and the charging power switch respectively through the universal input/output GPIO interface, and acquires the charging parameter detected by the detecting circuit through the analog-digital converter ADC detecting interface.

In the above solution, the master control system acquires the charging parameters detected by the detection loop, and specifically includes:

The main control system detects a voltage value VD of the third port D in the voltage dividing circuit when the preset detection period arrives within a preset detection period.

Correspondingly, the master control system determines the working state of the active antenna according to the preset determining policy according to the charging parameter, and specifically includes:

The main control system determines an operating state of the main antenna according to a voltage value VD when the third port D of the voltage dividing circuit arrives at a preset detection period.

In the above solution, the main control system determines the working state of the main antenna according to the voltage value of the third port D in the voltage dividing circuit when the preset detecting time period arrives, including:

When the main control system detects that the VD is zero, determining that the main antenna is short-circuited;

When the main control system detects that the VD is far greater than the terminal voltage when the charging circuit is normally charged, determining that the main antenna is open;

When the main control system detects that the difference between the terminal voltage of the VD and the charging circuit is within a preset range, determining that the primary antenna is working normally; wherein the primary antenna is open and shorted The states all indicate that the working state of the primary antenna is abnormal.

The master control system sets a first charging time T1 and a second charging time T2 in a preset detection period T, where T>T2>T1;

The main control system detects a voltage value V1 corresponding to the voltage value V1 of the third port D of the voltage dividing circuit at the first charging time T1 and the second charging time T2;

Correspondingly, the master control system determines the working state of the active antenna according to the preset determining policy according to the charging parameter, specifically: the master control system determines the primary use according to a relationship between V1 and V2. The working state of the antenna.

In the above solution, the main control system determines the working state of the main antenna according to the relationship between V1 and V2, including:

When V2 is greater than V1, the main control system determines that the primary antenna is working normally; otherwise, the main control system determines that the active state of the primary antenna is abnormal.

In the above solution, the specific form of the detection circuit in the detecting circuit is a voltage dividing circuit, and the voltage dividing circuit includes an input voltage port B2 for inputting a voltage to the charging circuit and an ADC detecting interface connected to the main control system. And outputting a charging voltage port D2 of the charging voltage; wherein the input voltage port B2 is connected to a charging access point of the capacitor in the charging circuit.

The main control system detects a voltage value of the output charging voltage port D2 in the voltage dividing circuit when the preset detection period arrives;

The main control system determines an operating state of the main antenna according to a voltage value VD when the output charging voltage port D2 of the voltage dividing circuit arrives at a preset detection period.

In the above solution, the main control system determines the working state of the main antenna according to the voltage value VD of the output charging voltage port D2 in the voltage dividing circuit when the preset detecting time period arrives, including:

When the main control system detects that the VD is zero, determining that the main antenna is open;

When the main control system detects that the VD is far greater than the terminal voltage when the charging circuit is normally charged, determining that the main antenna is short-circuited;

In a third aspect, an embodiment of the present invention provides an antenna control method, where the method includes:

Providing a charging circuit connected to the main antenna;

Charging the charging circuit and detecting a charging parameter through a detecting circuit;

Determining, according to the charging parameter, an operating state of the primary antenna according to a preset determining policy;

When the operating state of the primary antenna is abnormal, the antenna connected to the radio frequency circuit is switched from the primary antenna to the backup antenna.

In the above solution, the detecting circuit is a voltage dividing circuit, and the voltage dividing circuit includes a first port E connected to the charging power source, a second port B inputting a voltage to the charging circuit, and the main control The ADC detection interface of the system is connected, and the third port D of the charging voltage is output.

In the above solution, the detecting the charging parameter by the detecting circuit specifically includes: detecting, during a preset detecting period, a voltage value VD when the third port D of the voltage dividing circuit arrives at a preset detecting time period;

Correspondingly, the determining, according to the preset determining policy, the working state of the active antenna according to the charging parameter, specifically:

The operating state of the primary antenna is determined according to the voltage value VD when the third port D arrives at the preset detection period in the voltage dividing circuit.

In the above solution, the operating state of the primary antenna is determined according to the voltage value VD when the third port D reaches the preset detection period in the voltage dividing circuit, and specifically includes:

When it is detected that VD is zero, it is determined that the main antenna is short-circuited;

Determining that the primary antenna works normally when detecting that a difference between a VD and a terminal voltage when the charging circuit is normally charged is within a preset range; wherein an open circuit and a short circuit state of the primary antenna indicate the The working status of the main antenna is abnormal.

In the above solution, the detecting the charging parameter by using the detecting circuit comprises:

Correspondingly, determining the working state of the active antenna according to the preset determining policy according to the charging parameter, specifically: determining that the primary antenna works normally when V2 is greater than V1; otherwise, determining the primary The antenna is working abnormally.

In the above solution, the detecting circuit is a voltage dividing circuit, and the voltage dividing circuit includes an input voltage port B2 for inputting a voltage to the charging circuit and an ADC detecting interface connected to the main control system, and outputs an output of the charging voltage. a charging voltage port D2; wherein the input voltage port B2 is coupled to a charging access point of a capacitor in the charging circuit.

In the above solution, the detecting the charging parameter by the detecting circuit specifically includes: detecting a voltage value when the output charging voltage port D2 of the voltage dividing circuit arrives at a preset detection time period;

Correspondingly, determining the working state of the active antenna according to the preset determining policy according to the charging parameter, specifically, comprising: according to the voltage of the output charging voltage port D2 in the voltage dividing circuit when the preset detecting time period arrives The value VD determines the operating state of the primary antenna.

In the above solution, the operating state of the primary antenna is determined according to the voltage value VD when the output charging voltage port D2 of the voltage dividing circuit reaches the preset detection time period, and specifically includes:

When it is detected that VD is zero, it is determined that the primary antenna is open;

According to still another embodiment of the present invention, there is also provided a storage medium comprising a stored program, wherein the program is executed to perform the method of any of the above.

According to still another embodiment of the present invention, there is also provided a processor for running a program, wherein the program is executed to perform the method of any of the above.

The embodiment of the invention provides an antenna control circuit and method for determining whether the connection state of the antenna is normal by monitoring the charging parameter change process on the charging circuit, and performing switching of the standby antenna when the antenna connection state is abnormal to ensure normal operation. Communication status, so as to avoid normal communication due to antenna failure.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

FIG. 1 is a schematic diagram of an antenna control circuit according to an embodiment of the present invention;

2 is a schematic diagram of a specific implementation of a charging circuit according to an embodiment of the present invention;

3 is a schematic diagram of a specific implementation of a detection loop according to an embodiment of the present invention;

4 is a schematic diagram of a charging process of a charging circuit according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of another antenna control circuit according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic diagram of another implementation of a detection loop according to an embodiment of the present invention;

FIG. 7 is a schematic flowchart of an antenna control method according to an embodiment of the present disclosure;

FIG. 8 is a schematic flowchart of another antenna control method according to an embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings.

The basic idea of the embodiment of the present invention is to connect the charging circuit at the antenna connector of the primary antenna, and determine whether the connection state of the primary antenna is normal by detecting relevant parameters of the charging circuit during charging. Based on this basic idea, the following embodiments of the present invention are proposed.

Embodiment 1

FIG. 1 is a schematic diagram of an antenna control circuit according to an embodiment of the present invention. The circuit 1 may include an antenna system 10; the antenna system 10 may include: a primary antenna 101, a backup antenna 102, an antenna connector 103, and an antenna switch. Switch 104;

Generally, the antenna switch 104 can switch the connection with the radio frequency circuit between the main antenna 101 and the backup antenna 102; the antenna connector 103 is connected to the main antenna 101 or the backup antenna 102 to form a radio frequency channel. The antenna switching switch 104 may specifically be a single-pole double-throw switch, which is not specifically limited in this embodiment.

The antenna control circuit 1 provided in this embodiment further includes: a charging circuit 20, a detecting circuit 30, and a main control system 40;

The charging circuit 20 is connected to the main antenna 101;

The detecting circuit 30 includes a charging power source 301, a charging power switch 302 and a detecting circuit 303. After the charging power switch 302 is turned on, the charging power source 301 charges the charging circuit 20, and the detecting circuit 303 detects the charging parameter of the charging circuit 20 during charging, for example, Detecting a voltage value of the charging circuit 20 during charging;

The main control system 40 is configured to instruct the charging power source 301 to charge the charging circuit 20 by controlling the charging power switch 302 to be turned on;

And acquiring the charging parameter detected by the detection circuit 303;

And determining, according to the charging parameter, the working state of the main antenna 101 according to a preset determining strategy;

And, when it is determined that the operational state of the primary antenna 101 is abnormal, the antenna switching switch 104 in the control antenna system 10 switches the antenna connected to the radio frequency circuit from the primary antenna 101 to the backup antenna 102.

It can be understood that the main control system 40 can acquire the charging parameters detected by the detection circuit 303 within a preset detection period, wherein the preset detection period generally does not exceed the time required for the charging circuit 20 to complete charging.

It should be noted that, in order to protect the charging circuit 20, a corresponding protection circuit 11 is required in the antenna control circuit 1, and may include a DC blocking protection portion and an AC blocking protection portion; specifically, it may be blocked by a capacitive device. The DC signal damages the antenna system, and an inductance device or a resistance device with a large inductance is added to the DC path to block the shunt of the RF signal.

For example, the charging circuit 20 can be realized by connecting a series of inductors or resistors with a capacitor having a large capacitance value and grounding. The specific implementation circuit is shown in FIG. 2 .

It should be noted that the selection rule of the capacitance value, the inductance value and the resistance value may be: the inductance value or the resistance value is to ensure that the RF signal of the antenna can be blocked from short-circuiting to the ground, and the RF impedance in the working frequency band of the antenna is not affected, and The selection of the resistance value will affect the charging current and affect the charging time. The selection of the capacitance value needs to be selected according to the length of the charging and discharging time, but it can not affect the resonant frequency or RF impedance of the antenna. In a specific implementation process, preferably, the capacitance value is 0.1 microfarad μF, the inductance value is 68 nH, and the resistance value is 100 kΩ kΩ. Accordingly, the charging circuit 20 completes the charging time T of 2.62 milliseconds ms.

Exemplarily, the master control system 40 can control the antenna switch 104 and the charge power switch 302 respectively through a General Purpose Input Output (GPIO) interface, and can pass an analog-to-digital converter (ADC, Analog-to-Digital). The detection interface acquires the charging parameter detected by the detection circuit 303, and can also time the charging parameter detected by the ADC detection interface acquisition detection circuit 303 by the timer.

In the first specific implementation process, in conjunction with the antenna control circuit 1 shown in FIG. 1, referring to FIG. 3, the specific form of the detection circuit 303 in the detection circuit 30 may be a voltage dividing circuit, and the voltage dividing circuit includes a charging power source 301. The connected first port E, the second port B that inputs the voltage to the charging circuit 20, and the ADC detection interface of the main control system 40, output the third port D of the charging voltage, and the resistance value and the connection form in the voltage dividing circuit can be According to the actual situation, the specific setting rule is: when the main antenna 101 is in an open state, the voltage VB of the second port B is much larger than the third port of the main antenna 101 when the charging circuit 20 is charged under the normal working state. The voltage VD of D, for example, is a voltage dividing circuit as shown in Fig. 3, R1 = R2 = 45kΩ, and R3 = 10kΩ.

Preferably, when the detection circuit 303 is the voltage dividing circuit shown in FIG. 3, the main control system 40 can detect the voltage value of the third port D in the voltage dividing circuit when the preset detection period arrives, and determine according to the voltage value. The operating state of the main antenna 101. In this embodiment, the charging completion time is 2.62 ms, and the preset detection time period is 1 ms.

Taking the voltage of the charging power source as 5V as an example, refer to the charging process diagram of the charging circuit shown in FIG. 4. The interval between the origin and the Ts point in the figure is the charging completion interval of the charging circuit, and the duration is 2.62 ms, charging. The charging curve of the circuit is as shown in the figure. It can be known that the charging curve is incremented in the charging completion interval, and as shown in FIG. 4, the main control system 40 selects the preset detection time period T0 by the timer. 1ms.

It should be noted that when T0=1ms, the voltage value of the corresponding point on the charging circuit as shown in FIG. 1 is 2.5V, and the voltage at the point B shown in FIG. 1 is equal to the voltage at point A, as shown in FIG. The detection voltage dividing circuit, in which R1=R2=45kΩ and R3=10kΩ, the detection voltage at point D is V2=1.25V, so the ADC detection value fed back to the control system is 1.25V. That is, the timer in the main control system 40 is set to T0 = 1 ms, and the ADC voltage value is detected when the timer ends, and the detected voltage value should be 1.25V. Taking into account many factors such as layout traces on the circuit, the actual decision threshold of the ADC is set according to this theoretical value: 1.15V-1.35V. As long as the ADC detection voltage falls within this range, it can be determined that the charging circuit can be charged normally. The ADC detection system can detect the corresponding charging voltage under normal antenna connection. When the antenna interface is short-circuited, the charging circuit cannot be charged normally. The voltage at point B is 0, and the voltage corresponding to the detected ADC is also V1=0. When the antenna interface is open, the same charging voltage can not reach the charging circuit, and can not be charged normally. At this time, the voltage at point B is equal to 5V. After the voltage value of the voltage dividing circuit is VB=4.5V, the ADC detection voltage value is V3=2.25. V.

It is worth noting that the resistance value of the voltage divider circuit can be calculated according to its own hardware design. The principle is that the VB in the open state is much larger than the ADC sampling value during normal charging, so as to avoid the misjudgment of the charging voltage. After the ADC detects the result, the main control system 40 issues a command to disconnect the charging power switch 302 through the GPIO interface, so that the charging circuit discharges, and the timer turns on the recording discharge time, and the discharging time ends.

Taking the charging circuit 20 and the detecting circuit 303 shown in FIG. 2 and FIG. 3 as an example: when the main antenna is normal, the charging circuit 20 reaches the third port D voltage VD of the voltage dividing circuit when the preset detecting period reaches 1 ms. It is 1.25V; therefore, the main control system 40 can determine the operating state of the main antenna 101 by detecting the third port D voltage VD, specifically: when the main antenna 101 is short-circuited, the charging circuit 20 cannot be normally charged, therefore, the detection circuit In the 303, the third port D voltage VD of the voltage dividing circuit is zero; when the main antenna 101 is open, the charging voltage cannot reach the charging circuit, and therefore cannot be normally charged. At this time, the third port D voltage VD of the voltage dividing circuit in the detecting circuit 303 will be The terminal voltage when the charging circuit 20 is normally charged is far greater than the preset threshold when the terminal voltage of the third port D voltage VD and the charging circuit 20 is normally charged is greater than the preset threshold. For example, when the main antenna 101 is open, the voltage VB at the B point is 4.5V, and the VD is 2.25V, which is significantly larger than the terminal voltage of the charging circuit 20 when it is normally charged 1.25V.

Therefore, when the main control system 40 detects that the VD is zero, it determines that the main antenna 101 is short-circuited; when the main control system 40 detects that the VD is 2.25 V, it determines that the main antenna 101 is open; when the main control system 40 detects the VD and When the difference of 1.25V is within the preset range, it is determined that the main antenna 101 operates normally. In this embodiment, when the VD is at 1.15V to 1.35V, it is determined that the difference between VD and 1.25V is within a preset range. When the main control system 40 detects that the main antenna 101 is short-circuited or open, the control antenna changeover switch 104 switches the antenna connected to the radio frequency circuit from the main antenna 101 to the backup antenna 102.

Preferably, when the detection circuit 303 is a voltage dividing circuit, the main control system 40 can set the first charging time T1 and the second charging time T2 in a preset detection period T, where T>T2>T1; and detecting The third port D of the voltage dividing circuit has a voltage value V1 corresponding to the first charging time T1 and a voltage value V2 corresponding to the second charging time T2; and determines an operating state of the main antenna 101 according to a relationship between V1 and V2. In detail, when V2 is greater than V1, the main control system 40 determines that the main antenna 101 is operating normally; otherwise, the main control system 40 determines that the main antenna 101 is in an abnormal state of operation.

In another specific implementation process, as shown in FIG. 5, the detection circuit 303 can be separated from the charging power source 301, and the charging power source 301 directly charges the charging circuit 20 through the charging power switch 302, and the detection circuit 303 is directly connected to the charging circuit. Connecting, referring to FIG. 6, the specific form of the detecting circuit 303 may be a voltage dividing circuit including an input voltage port B2 for inputting a voltage to the charging circuit 20 and an ADC detecting interface connected to the main control system 40, and outputting a charging voltage. The output charging voltage port D2; wherein the input voltage port B2 is connected to the charging access point of the capacitor in the charging circuit 20.

Correspondingly, when the main antenna port is open, as shown in FIG. 6, port A2 is disconnected from port B2, so that the input voltage port B2 cannot obtain the charging voltage, so the voltage of the ADC to the output charging voltage port D2 is 0; When the port is short-circuited, that is, the port A2 and the port B2 are directly short-circuited, and the resistance R of the detecting circuit is skipped. At this time, the charging power source 301 directly skips the charging resistor R to charge the charging capacitor C2, and the charging time is shortened because the charging resistance is small. It becomes shorter, so at the same charging time T, the ADC detects that the voltage of the output charging voltage port D2 should be much larger than the charging voltage of the antenna during normal operation.

Therefore, when the main control system 40 detects that the VD is zero, it determines that the main antenna 101 is open; when the main control system 40 detects that the VD is far greater than the terminal voltage when the charging circuit 20 is normally charged, it is determined that the main antenna 101 is short-circuited; When the main control system 40 detects that the difference between the VD and the terminal voltage when the charging circuit 20 is normally charged is within a preset range, it is determined that the main antenna 101 is operating normally. In this embodiment, when the VD is at 1.15V to 1.35V, it is determined that the difference between VD and 1.25V is within a preset range. When the main control system 40 detects that the main antenna 101 is short-circuited or open, the control antenna changeover switch 104 switches the antenna connected to the radio frequency circuit from the main antenna 101 to the backup antenna 102.

It can be understood that the antenna system described in this embodiment may be a multi-antenna system. Therefore, the port of the main control system 40 can be increased to enable simultaneous detection of multiple antennas. This embodiment does not describe this.

The embodiment provides an antenna control circuit, which is connected to the charging circuit at the antenna connector of the main antenna, and determines whether the connection state of the main antenna is normal by detecting relevant parameters of the charging circuit during charging, and implementing antenna detection. At the same time, the current input to the antenna system is also prevented from being distributed to other components, resulting in loss of current power.

Embodiment 2

Based on the same technical concept of the foregoing embodiment, referring to FIG. 7, an antenna control method according to an embodiment of the present invention may be applied to the antenna control circuit according to any one of the foregoing embodiments. The antenna control circuit comprises an antenna system, a charging circuit, a detecting circuit and a main control system; wherein the antenna system may comprise: a main antenna, a backup antenna, an antenna connector and an antenna switching switch; the charging circuit is connected to the main antenna; the detecting circuit The utility model comprises a charging power source, a charging power switch and a detecting circuit; after the charging power switch is turned on, the charging power source charges the charging circuit, and the detecting circuit detects the charging parameter of the charging circuit during the charging process; the method comprises:

S701: the main control system instructs the charging power source to charge the charging circuit by controlling the opening of the charging power switch;

S702: The main control system acquires a charging parameter detected by the detection loop;

S703: The main control system determines, according to the charging parameter, a working state of the main antenna according to a preset determining policy;

S704: When the main control system determines that the working state of the main antenna is abnormal, the main control system controls the antenna switching switch in the antenna system to switch the antenna connected to the radio frequency circuit from the main antenna to the standby antenna.

It can be understood that the main control system can acquire the charging parameters detected by the detection circuit within a preset time period, and the preset detection time period usually does not exceed the time required for the charging circuit to be charged.

Illustratively, the charging circuit can be realized by a series inductance or a resistance of a capacitive device having a large capacitance value and grounding.

Illustratively, the master control system can separately control the antenna switch and the charge power switch through a General Purpose Input/Output (GPIO) interface, and can be detected by an analog-to-digital converter (ADC, Analog-to-Digital Converter). The interface acquires the charging parameter detected by the detection loop, and can also time the charging parameter detected by the detection circuit by the ADC detection interface.

Illustratively, the specific form of the detection circuit in the detection circuit may be a voltage dividing circuit including a first port E connected to the charging power source, a second port B inputting a voltage to the charging circuit, and an ADC with the main control system. The interface connection is detected, and the third port D of the charging voltage is output.

Preferably, the main control system acquires the charging parameter detected by the detection loop in a preset detection period, which may specifically include:

The main control system detects the voltage value VD at which the third port D of the voltage dividing circuit arrives at the preset detection period.

Correspondingly, the main control system determines the working state of the active antenna according to the preset determination policy according to the charging parameter, which specifically includes:

The main control system determines the working state of the main antenna according to the voltage value VD when the third port D of the voltage dividing circuit arrives at the preset detection period.

Further, the main control system determines the working state of the main antenna according to the voltage value of the third port D in the voltage dividing circuit when the preset detecting time period arrives, which may include:

When the main control system detects that VD is zero, it is determined that the main antenna is short-circuited;

When the main control system detects that the VD is far greater than the terminal voltage when the charging circuit is normally charged, it is determined that the main antenna is open;

When the main control system detects that the difference between the terminal voltage of the VD and the charging circuit is within a preset range, it determines that the main antenna works normally; wherein the open and short state of the main antenna indicate the operation of the main antenna The status is abnormal.

The main control system sets a first charging time T1 and a second charging time T2 in a preset detection period T, where T>T2>T1;

The main control system detects the voltage value V1 corresponding to the voltage value V1 of the third port D of the voltage dividing circuit at the first charging time T1 and the second charging time T2;

Correspondingly, the main control system determines the working state of the main antenna according to the preset determination strategy according to the charging parameter, and specifically includes: the main control system determines the working state of the main antenna according to the relationship between V1 and V2.

Specifically, the master control system determines the working state of the active antenna according to the relationship between V1 and V2, and may include:

When V2 is greater than V1, the main control system determines that the main antenna is working normally; otherwise, the main control system determines that the main antenna 101 is in an abnormal state of operation.

Exemplarily, the detection circuit can be separated from the charging power source, and the charging power source directly charges the charging circuit through the charging power switch, and the detection circuit is directly connected to the charging circuit. Specifically, the specific form of the detecting circuit can be a voltage dividing circuit. The voltage dividing circuit comprises an input voltage port B2 for inputting a voltage to the charging circuit and an output charging voltage port D2 connected to the ADC detecting interface of the main control system, and outputting a charging voltage; wherein the input voltage port B2 is connected to the capacitor of the charging circuit. The in points are connected.

The main control system detects the voltage value of the output charging voltage port D2 in the voltage dividing circuit when it arrives at the preset detection period.

The main control system determines the working state of the main antenna according to the voltage value VD when the output charging voltage port D2 reaches the preset detection period in the voltage dividing circuit.

Further, the main control system determines the working state of the main antenna according to the voltage value VD when the output charging voltage port D2 reaches the preset detection period in the voltage dividing circuit, and may include:

When the main control system detects that the VD is zero, it is determined that the main antenna is open;

When the main control system detects that the VD is far greater than the terminal voltage when the charging circuit is normally charged, it is determined that the main antenna is short-circuited;

The embodiment provides an antenna control method, in which a charging circuit is connected at an antenna connector of a primary antenna, and a connection parameter of the primary antenna is determined by detecting a relevant parameter of the charging circuit during charging, and the antenna detection is implemented. At the same time, the current input to the antenna system is also prevented from being distributed to other components, resulting in loss of current power.

Embodiment 3

Based on the same technical concept of the foregoing embodiment, referring to FIG. 8, a method for controlling an antenna provided by an embodiment of the present invention is provided. The method may be applied to a terminal having a primary and a backup antenna, and the method may include:

S801: setting a charging circuit connected to the main antenna;

S802: charging the charging circuit, and detecting a charging parameter by using a detecting circuit;

S803: Determine, according to the charging parameter, a working state of the active antenna according to a preset determining policy.

S804: When the working state of the primary antenna is abnormal, the antenna connected to the radio frequency circuit is switched from the primary antenna to the backup antenna.

Illustratively, the detecting circuit is a voltage dividing circuit, and the voltage dividing circuit includes a first port E connected to the charging power source, a second port B inputting a voltage to the charging circuit, and the main control system The ADC detects the interface connection and outputs the third port D of the charging voltage.

Preferably, the detecting the charging parameter by the detecting circuit comprises: detecting, during a preset detecting period, a voltage value VD when the third port D of the voltage dividing circuit arrives at a preset detecting time period;

Specifically, determining the working state of the primary antenna according to the voltage value VD when the third port D reaches the preset detection period in the voltage dividing circuit may include:

Preferably, the detecting the charging parameter by using the detecting circuit comprises:

Exemplarily, the detecting circuit is a voltage dividing circuit, and the voltage dividing circuit includes an input voltage port B2 that inputs a voltage to the charging circuit and an ADC detecting interface connected to the main control system, and outputs an output charging of the charging voltage. Voltage port D2; wherein the input voltage port B2 is coupled to a charging access point of a capacitor in the charging circuit.

Preferably, the detecting the charging parameter by the detecting circuit comprises: detecting a voltage value of the output charging voltage port D2 in the voltage dividing circuit when the preset detecting time period arrives;

Specifically, the determining, according to the voltage value VD when the output charging voltage port D2 of the voltage dividing circuit reaches the preset detection period, determines the working state of the active antenna, which specifically includes:

It should be noted that the technical solution in this embodiment may be implemented by the antenna control circuit disposed in the terminal in the foregoing embodiment, which is not described in this embodiment.

Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the above storage medium may be configured to store program code for performing the above steps.

Optionally, in the embodiment, the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a Random Access Memory (RAM). A variety of media that can store program code, such as a hard disk, a disk, or an optical disk.

Optionally, in the embodiment, the processor performs the above steps according to the stored program code in the storage medium.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Industrial applicability

As described above, the embodiment of the present invention provides an antenna control circuit and method, which has the following beneficial effects: when an abnormality occurs in the connection state of the antenna, the normal communication state can still be ensured, thereby avoiding the failure of normal communication due to the antenna failure. The situation happened.

Claims

An antenna control circuit includes: an antenna system, a charging circuit, a detecting circuit, and a main control system; wherein the antenna system may include: a main antenna, a backup antenna, and an antenna switching switch;

The charging circuit is adjacent to the main antenna;

The detection circuit includes a charging power source, a charging power switch, and a detection circuit;

The main control system is configured to instruct the charging power source to charge the charging circuit by controlling the charging power switch to be turned on;

And acquiring a charging parameter detected by the detection loop;

And determining, according to the charging parameter, an operating state of the primary antenna according to a preset determining policy;

And, when it is determined that the working state of the primary antenna is abnormal, controlling an antenna switching switch in the antenna system to switch an antenna connected to the radio frequency circuit from the primary antenna to the backup antenna.
The antenna control circuit according to claim 1, wherein the charging circuit is realized by a series inductance or a resistance of a capacitive device having a large capacitance value and grounding.
The antenna control circuit according to claim 1, wherein said main control system controls said antenna switching switch and said charging power switch respectively through a universal input/output GPIO interface, and acquires an interface through an analog-to-digital converter ADC detecting interface The charging parameters detected by the detection loop are described.
The antenna control circuit according to claim 3, wherein the specific form of the detection circuit in the detecting circuit is a voltage dividing circuit, and the voltage dividing circuit includes a first port E connected to the charging power source, and the charging is performed The second port B of the circuit input voltage is connected to the ADC detection interface of the main control system, and outputs the third port D of the charging voltage.
The antenna control circuit according to claim 4, wherein the main control system is specifically configured to:

When it is detected that the voltage VD of the third port D is zero, determining that the main antenna is short-circuited;

Determining that the main antenna is open when it is detected that the VD is far greater than the terminal voltage when the charging circuit is normally charged;

When it is detected that the difference between the VD and the terminal voltage when the charging circuit is normally charged is within a preset range, it is determined that the primary antenna operates normally.
The antenna control circuit according to claim 1, wherein the main control system is specifically configured to: when detecting that the main antenna is short-circuited or open-circuited, control an antenna connected to the radio frequency circuit by the antenna switching switch The primary antenna is switched to the backup antenna.
The antenna control circuit according to claim 4, wherein the main control system is specifically configured to:

Setting a first charging time T1 and a second charging time T2 in a preset detection period T, where T>T2>T1;

And detecting, by the third port D, the voltage value V1 corresponding to the first charging time T1 and the voltage value V2 corresponding to the second charging time T2;

And, the working state of the main antenna is determined according to the relationship between V1 and V2.
The antenna control circuit according to claim 7, wherein the master control system is configured to:

When the V2 is greater than the V1, it is determined that the primary antenna works normally; otherwise, it is determined that the active state of the primary antenna is abnormal.
The antenna control circuit according to claim 3, wherein the specific form of the detection circuit in the detecting circuit is a voltage dividing circuit, and the voltage dividing circuit comprises: an input voltage port B2 and a voltage input to the charging circuit The ADC detection interface of the main control system is connected to output an output charging voltage port D2 of the charging voltage; wherein the input voltage port B2 is connected to a charging access point of the capacitor in the charging circuit.
The antenna control circuit according to claim 9, wherein said master control system is configured to:

When it is detected that the voltage VD of the output charging voltage port D2 is zero, it is determined that the primary antenna is open;

When it is detected that the VD is far greater than the terminal voltage when the charging circuit is normally charged, it is determined that the primary antenna is short-circuited;

When it is detected that the difference between the VD and the terminal voltage when the charging circuit is normally charged is within a preset range, it is determined that the primary antenna operates normally.
An antenna control method is applied to an antenna control circuit, where the antenna control circuit includes an antenna system, a charging circuit, a detecting circuit, and a main control system. The antenna system may include: a primary antenna and a backup antenna. And an antenna switching switch; the charging circuit is connected to the main antenna; the detecting circuit includes a charging power source, a charging power switch, and a detecting circuit; after the charging power switch is turned on, the charging power source is to the charging circuit Charging, the detection loop detects a charging parameter of the charging circuit during charging; the method includes:

The main control system instructs the charging power source to charge the charging circuit by controlling the opening of the charging power switch;

The main control system acquires a charging parameter detected by the detection loop;

Determining, by the main control system, an operating state of the active antenna according to the preset determining policy according to the charging parameter;

When the main control system determines that the working state of the main antenna is abnormal, the main control system controls an antenna switching switch in the antenna system to switch an antenna connected to the radio frequency circuit from the main antenna to the Spare antenna.
The method according to claim 11, wherein the main control system controls the antenna switching switch and the charging power switch respectively through a universal input/output GPIO interface, and acquires the charging detected by the detecting circuit through the analog-digital converter ADC detecting interface. parameter.
The method according to claim 12, wherein the specific form of the detection circuit in the detecting circuit is a voltage dividing circuit, and the voltage dividing circuit includes a first port E connected to the charging power source, and inputs to the charging circuit The second port B of the voltage is connected to the ADC detection interface of the main control system, and outputs the third port D of the charging voltage.
The method of claim 13, wherein the master control system acquires the charging parameter detected by the detection loop, and specifically includes:

The main control system detects a voltage value VD of the third port D in the voltage dividing circuit when the preset detection period arrives within a preset detection period.

Correspondingly, the master control system determines the working state of the active antenna according to the preset determining policy according to the charging parameter, and specifically includes:

The main control system determines an operating state of the main antenna according to a voltage value VD when the third port D of the voltage dividing circuit arrives at a preset detection period.
The method according to claim 14, wherein the main control system determines the working state of the main antenna according to the voltage value of the third port D in the voltage dividing circuit when the preset detecting period arrives, including :

When the main control system detects that the VD is zero, determining that the main antenna is short-circuited;

When the main control system detects that the VD is far greater than the terminal voltage when the charging circuit is normally charged, determining that the main antenna is open;

When the main control system detects that the difference between the terminal voltage of the VD and the charging circuit is within a preset range, determining that the primary antenna is working normally; wherein the primary antenna is open and shorted The states all indicate that the working state of the primary antenna is abnormal.
The method of claim 13, wherein the master control system acquires the charging parameter detected by the detection loop, and specifically includes:

The master control system sets a first charging time T1 and a second charging time T2 in a preset detection period T, where T>T2>T1;

The main control system detects a voltage value V1 corresponding to the voltage value V1 of the third port D of the voltage dividing circuit at the first charging time T1 and the second charging time T2;

Correspondingly, the master control system determines the working state of the active antenna according to the preset determining policy according to the charging parameter, specifically: the master control system determines the primary use according to a relationship between V1 and V2. The working state of the antenna.
The method according to claim 16, wherein the master control system determines the working state of the active antenna according to the relationship between V1 and V2, including:

When V2 is greater than V1, the main control system determines that the primary antenna is working normally; otherwise, the main control system determines that the active state of the primary antenna is abnormal.
The method according to claim 12, wherein the specific form of the detection circuit in the detecting circuit is a voltage dividing circuit, the voltage dividing circuit includes an input voltage port B2 for inputting a voltage to the charging circuit, and the master The ADC detection interface of the system is connected to output an output charging voltage port D2 of the charging voltage; wherein the input voltage port B2 is connected to a charging access point of the capacitor in the charging circuit.
The method of claim 18, wherein the master control system acquires the charging parameter detected by the detection loop, specifically comprising:

The main control system detects a voltage value of the output charging voltage port D2 in the voltage dividing circuit when the preset detection period arrives;

Correspondingly, the master control system determines the working state of the active antenna according to the preset determining policy according to the charging parameter, and specifically includes:

The main control system determines an operating state of the main antenna according to a voltage value VD when the output charging voltage port D2 of the voltage dividing circuit arrives at a preset detection period.
The method according to claim 19, wherein said main control system determines an operating state of said main antenna according to a voltage value VD when said output charging voltage port D2 of said voltage dividing circuit arrives at a preset detection period ,include:

When the main control system detects that the VD is zero, determining that the main antenna is open;

When the main control system detects that the VD is far greater than the terminal voltage when the charging circuit is normally charged, determining that the main antenna is short-circuited;

When the main control system detects that the difference between the terminal voltage of the VD and the charging circuit is within a preset range, determining that the primary antenna is working normally; wherein the primary antenna is open and shorted The states all indicate that the working state of the primary antenna is abnormal.
An antenna control method, the method comprising:

Providing a charging circuit connected to the main antenna;

Charging the charging circuit and detecting a charging parameter through a detecting circuit;

Determining, according to the charging parameter, an operating state of the primary antenna according to a preset determining policy;

When the operating state of the primary antenna is abnormal, the antenna connected to the radio frequency circuit is switched from the primary antenna to the backup antenna.
The method according to claim 21, wherein said detecting circuit is a voltage dividing circuit, said voltage dividing circuit comprising a first port E connected to said charging power source, and a second port B inputting a voltage to said charging circuit And a third port D that is connected to the ADC detection interface of the main control system and outputs a charging voltage.
The method according to claim 22, wherein the detecting the charging parameter by the detecting circuit comprises: detecting that the third port D of the voltage dividing circuit arrives in a preset detecting period within a preset detecting period Time voltage value VD;

Correspondingly, the determining, according to the preset determining policy, the working state of the active antenna according to the charging parameter, specifically:

The operating state of the primary antenna is determined according to the voltage value VD when the third port D arrives at the preset detection period in the voltage dividing circuit.
The method according to claim 23, wherein the determining the operating state of the primary antenna according to the voltage value VD when the third port D reaches the preset detection period in the voltage dividing circuit comprises:

When it is detected that VD is zero, it is determined that the main antenna is short-circuited;

Determining that the main antenna is open when it is detected that the VD is far greater than the terminal voltage when the charging circuit is normally charged;

Determining that the primary antenna works normally when detecting that a difference between a VD and a terminal voltage when the charging circuit is normally charged is within a preset range; wherein an open circuit and a short circuit state of the primary antenna indicate the The working status of the main antenna is abnormal.
The method of claim 22, wherein the detecting the charging parameter by the detecting circuit comprises:

Setting a first charging time T1 and a second charging time T2 in a preset detection period T, where T>T2>T1;

The main control system detects a voltage value V1 corresponding to the voltage value V1 of the third port D of the voltage dividing circuit at the first charging time T1 and the second charging time T2;

Correspondingly, determining the working state of the active antenna according to the preset determining policy according to the charging parameter, specifically: determining that the primary antenna works normally when V2 is greater than V1; otherwise, determining the primary The antenna is working abnormally.
The method according to claim 21, wherein said detecting circuit is a voltage dividing circuit, said voltage dividing circuit comprising an input voltage port B2 for inputting a voltage to said charging circuit and an ADC detecting interface connected to said main control system And outputting a charging voltage port D2 of the charging voltage; wherein the input voltage port B2 is connected to a charging access point of the capacitor in the charging circuit.
The method according to claim 26, wherein the detecting the charging parameter by the detecting circuit comprises: detecting a voltage value when the output charging voltage port D2 of the voltage dividing circuit arrives at a preset detection period;

Correspondingly, determining the working state of the active antenna according to the preset determining policy according to the charging parameter, specifically, comprising: according to the voltage of the output charging voltage port D2 in the voltage dividing circuit when the preset detecting time period arrives The value VD determines the operating state of the primary antenna.
The method according to claim 27, wherein the determining the operating state of the primary antenna according to the voltage value VD when the output charging voltage port D2 reaches the preset detection period in the voltage dividing circuit includes :

When it is detected that VD is zero, it is determined that the primary antenna is open;

When it is detected that the VD is far greater than the terminal voltage when the charging circuit is normally charged, it is determined that the primary antenna is short-circuited;

Determining that the primary antenna works normally when detecting that a difference between a VD and a terminal voltage when the charging circuit is normally charged is within a preset range; wherein an open circuit and a short circuit state of the primary antenna indicate the The working status of the main antenna is abnormal.
A storage medium, the storage medium comprising a stored program, wherein the program is executed to perform the method of any one of claims 11 to 28.