CN216718651U - Antenna feed detection circuit, antenna feed detection device and antenna system - Google Patents
Antenna feed detection circuit, antenna feed detection device and antenna system Download PDFInfo
- Publication number
- CN216718651U CN216718651U CN202123121256.2U CN202123121256U CN216718651U CN 216718651 U CN216718651 U CN 216718651U CN 202123121256 U CN202123121256 U CN 202123121256U CN 216718651 U CN216718651 U CN 216718651U
- Authority
- CN
- China
- Prior art keywords
- antenna
- voltage
- resistor
- power supply
- supply port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The application belongs to the technical field of antenna detection, and provides an antenna feed detection circuit, an antenna feed detection device and an antenna system, the voltage of the antenna power supply port is sampled by the short circuit detection module to generate a feed short circuit detection signal, the shunt module is arranged between the antenna power supply port and the antenna load port, the current of the antenna power supply port is mirrored by the mirror current module, so as to regulate the current of the antenna load port, sample the voltage of the antenna power supply port through the comparison module to obtain a voltage sampling signal, generating a reference threshold voltage signal based on the voltage at the antenna load port, and comparing the voltage sampled signal to the reference threshold voltage signal, and generating an antenna state detection signal according to the comparison result, thereby solving the problem that the antenna state of the existing active antenna is difficult to detect in the process of installation or debugging.
Description
Technical Field
The application belongs to the technical field of antenna detection, and particularly relates to an antenna feed detection circuit, an antenna feed detection device and an antenna system.
Background
Nowadays, terminals (such as smart phones and tablet computers) become important tools unavailable in people's work and life. The existing terminal development trend is mainly light and thin, occupies a large area of a screen ratio or is mainly an all-metal machine body, so that more space cannot be reserved inside the terminal to set the antenna of the terminal.
However, the interfaces of many antennas are also small and small, which are difficult to detect during the installation or debugging process, and the short circuit or open circuit condition is easy to occur, resulting in the damage of the device and the influence on the stability of the device.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem, an embodiment of the present application provides an antenna feeding detection circuit, an antenna feeding detection apparatus, and an antenna system, which can solve a problem that an antenna state of an existing active antenna is difficult to detect in an installation or debugging process.
A first aspect of an embodiment of the present application provides an antenna feed detection circuit, where the antenna feed detection circuit includes:
the short circuit detection module is connected with the antenna power supply port and used for sampling the voltage of the antenna power supply port and generating a feed short circuit detection signal according to the sampled voltage;
the shunt module is arranged between the antenna power supply port and the antenna load port;
the image current module is connected with the antenna power supply port, the antenna load port and the shunt module, and is used for generating image current according to the voltage of the antenna power supply port and regulating the voltage of the antenna load port;
and the comparison module is connected with the antenna power supply port and the antenna load port and used for sampling the voltage of the antenna power supply port to obtain a voltage sampling signal, generating a reference threshold voltage signal according to the voltage of the antenna load port, comparing the voltage sampling signal with the reference threshold voltage signal and generating an antenna state detection signal according to a comparison result.
In one embodiment, the comparison module comprises:
the feed sampling unit is connected with the antenna power supply port and used for sampling the voltage of the antenna power supply port to obtain a voltage sampling signal;
a threshold setting unit connected to the antenna load port, and configured to generate the reference threshold voltage according to a voltage of the antenna load port;
and the voltage comparison unit is connected with the threshold setting unit and the feeding sampling unit, and compares the voltage sampling signal with a reference threshold voltage to generate an antenna state detection signal.
In one embodiment, the comparison module further comprises:
and the pull-up unit is connected with the voltage comparison unit and is used for providing a pull-up resistor for the output end of the voltage comparison unit.
In one embodiment, the feeding sampling unit includes: a second resistor and a third resistor;
the first end of the second resistor is connected with the antenna power supply port, the second end of the second resistor and the first end of the third resistor are connected to the inverting input end of the voltage comparison unit in common, and the second end of the third resistor is grounded.
In one embodiment, the threshold setting unit includes: a fourth resistor and a fifth resistor;
the first end of the fourth resistor is connected with the antenna load port, the second end of the fourth resistor and the first end of the fifth resistor are connected to the positive phase input end of the voltage comparison unit in common, and the second end of the fifth resistor is connected with the output end of the voltage comparison unit.
In one embodiment, the voltage comparison unit is a comparator.
In one embodiment, the shunting module comprises: the first end of the first resistor is connected with the antenna power supply port, and the second end of the first resistor is connected with the antenna load port.
In one embodiment, the mirror current module includes: the device comprises a first triode, a second triode and a mirror current source;
the first end of the mirror current source is connected with the antenna power supply port, the second end of the mirror current source, the collector electrode of the first triode, the base electrode of the first triode and the base electrode of the second triode are connected together, the emitter electrode of the first triode is grounded together with the emitter electrode of the second triode, and the collector electrode of the second triode is connected with the antenna load port.
The second aspect of the embodiments of the present application further provides an antenna feeding detection apparatus, including the antenna feeding detection circuit as described in any one of the above.
A third aspect of the embodiments of the present application further provides an antenna system, where the antenna system includes: an antenna module; and the antenna feed detection circuit is connected with the antenna module.
The embodiment of the application provides an antenna feed detection circuit, an antenna feed detection device and an antenna system, wherein the voltage of an antenna power supply port is sampled through a short circuit detection module, and a feed short circuit detection signal is generated according to the sampled voltage; the shunt module is arranged between the antenna power supply port and the antenna load port, the current of the antenna power supply port is subjected to mirror image processing through the mirror image current module so as to adjust the current of the antenna load port, finally, the voltage of the antenna power supply port is sampled through the comparison module to obtain a voltage sampling signal, a reference threshold voltage signal is generated according to the voltage of the antenna load port, the voltage sampling signal is compared with the reference threshold voltage signal, an antenna state detection signal is generated according to a comparison result, and the problem that the antenna state existing in the installation or debugging process of the existing active antenna is difficult to detect is solved.
Drawings
Fig. 1 is a schematic circuit diagram of an antenna feed detection circuit according to an embodiment of the present application;
fig. 2 is a schematic circuit diagram of an antenna feed detection circuit according to another embodiment of the present application;
fig. 3 is a schematic diagram of an antenna system according to an embodiment of the present application.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means one or more unless specifically limited otherwise.
At present, many modules with external antennas adopt an active mode, and in order to save space, the interfaces of the antennas are mostly designed to be small and exquisite, for example, MMCX interfaces, so that short circuit or open circuit is easily caused in the process of installation or debugging, thereby causing the damage of devices and influencing the stability of the antennas.
In order to solve the above technical problem, an embodiment of the present application provides an antenna feeding detection circuit, and as shown in fig. 1, the antenna feeding detection circuit includes: the short circuit detection module 10, the shunt module 20, the mirror current module 30 and the comparison module 40.
Specifically, the short circuit detection module 10 is connected to the antenna power supply port VCC _ SYS, the short circuit detection module 10 samples a voltage of the antenna power supply port VCC _ SYS, and generates a feed short circuit detection signal according to the sampled voltage, the short circuit detection module 10 sends the feed short circuit detection signal to the main control unit, and the main control unit determines whether the antenna system is short-circuited according to a level thereof, for example, if the feed short circuit detection signal ANT _ SH _ DET at the output end of the short circuit detection module 10 is in a low level state, the main control unit determines that the antenna system is in a short circuit state.
In this embodiment, the shunt module 20 is disposed between the antenna power supply port VCC _ SYS and the antenna LOAD port VCC _ LOAD, the mirror current module 30 is connected to the antenna power supply port VCC _ SYS, the antenna LOAD port VCC _ LOAD and the shunt module 20, the mirror current module 30 is configured to generate a mirror current according to a voltage of the antenna power supply port VCC _ SYS, and the mirror current flows through the shunt module 20, so as to adjust a voltage of the antenna LOAD port VCC _ LOAD.
The comparison module 40 is connected to the antenna power supply port VCC _ SYS and the antenna LOAD port VCC _ LOAD, and the comparison module 40 is configured to sample a voltage of the antenna power supply port VCC _ SYS to obtain a voltage sampling signal, generate a reference threshold voltage signal according to the voltage of the antenna LOAD port VCC _ LOAD, compare the voltage sampling signal with the reference threshold voltage signal, and generate an antenna state detection signal according to a comparison result.
The main control unit is connected with the short circuit detection module 10 and the comparison module 40, the short circuit detection module 10 generates a feed short circuit detection signal and sends the feed short circuit detection signal to the main control unit, the comparison module 40 generates an antenna state detection signal and sends the antenna state detection signal to the main control unit, and the main control unit can generate an antenna feed detection signal according to the feed short circuit detection signal and the antenna state detection signal.
In one embodiment, the excessive resistance of the shunting module 20 may improve the detection accuracy of the normal operating current, but may reduce the power margin, and in a specific application, the resistance of the shunting module 20 may be selected such that the shunting voltage Vs is at least 10 times greater than the input offset voltage Vos of the comparing module 40.
For example, the resistance of the shunt module 20 needs to conform to the following relationship:
Vs＝(Ic*R1)≥10*Vos；
where Vs is the shunt voltage, Vos is the input offset voltage of the comparison module 40, R1 is the resistance of the shunt module 20, and Ic is the loop current when the feeding circuit operates normally and the antenna load is connected.
In a specific application embodiment, the comparing module 40 is configured to compare the voltage sampling signal with a reference threshold voltage signal and generate an antenna state detection signal according to the comparison result, so that it is required to determine a switching threshold required when the comparing module 40 outputs a high level VH to a low level VL and a low level VH to a high level VH.
For example, the high level VH and the low level VL output by the comparison module 40 need to satisfy the following relation:
VL＝VCC_SYS-(Ic*R1)；
VH＝VCC_SYS-(Ir*R1)；
VL represents a threshold value after the current is increased after the antenna load is normally connected, VH represents a threshold value after the current is restored to a normal level after the antenna load is disconnected, Ir is the current in a no-load state, and VCC _ SYS is the voltage of an antenna power supply port VCC _ SYS.
In a specific application embodiment, the main control unit may determine the operating state of the antenna system according to the levels of the feed short detection signal and the antenna state detection signal.
When the feeding circuit normally operates but no antenna load is connected, the loop current is the first loop current Ir, the antenna state detection signal ANT _ PWR _ DET at the output terminal of the comparison module 40 is in a high level state, the feeding short circuit detection signal ANT _ SH _ DET at the output terminal of the short circuit detection module 10 is in a high level state, and the antenna system is determined to be in an open circuit state.
When the feeding circuit normally operates and the antenna load is connected, the loop current is the second loop current Ic, the antenna state detection signal ANT _ PWR _ DET at the output terminal of the comparison module 40 is changed from a high level to a low level, the feeding short circuit detection signal ANT _ SH _ DET at the output terminal of the short circuit detection module 10 is in a high level, and at this time, it is determined that the antenna system is in a normal operating state.
When the feed circuit is short-circuited, the feed short-circuit detection signal ANT _ SH _ DET at the output terminal of the short-circuit detection module 10 is in a low level state, and the antenna state detection signal ANT _ PWR _ DET at the output terminal of the comparison module 40 is also in a high level state, at this time, it is determined that the antenna system is in a short-circuit state, and the main control can control the power supply circuit of the antenna module to turn off the power supply output, so that the safety of the circuit is protected, and the potential safety hazard caused by overcurrent is avoided.
In one embodiment, the comparison module 40 includes: a feed sampling unit 41, a threshold setting unit 42, and a voltage comparison unit 43.
The feed sampling unit 41 is connected to the antenna power supply port VCC _ SYS, and the feed sampling unit 41 is configured to sample a voltage of the antenna power supply port VCC _ SYS to obtain a voltage sampling signal.
The threshold setting unit 42 is connected to the antenna LOAD port VCC _ LOAD, and the threshold setting unit 42 is configured to generate a reference threshold voltage according to a voltage of the antenna LOAD port.
The voltage comparing unit 43 is connected to the threshold setting unit 42 and the feeding sampling unit 41, and the voltage comparing unit 43 is configured to compare the voltage sampling signal with a reference threshold voltage and generate an antenna state detection signal.
In this embodiment, the feeding sampling unit 41 is configured to sample a voltage at a power supply end of an antenna and determine whether a circuit is powered on, and a reference threshold voltage generated by the threshold setting unit 42 is determined by a change in a mirror current at a power supply end of a load, so that a change in the mirror current at the power supply end of the load can be detected by the threshold setting unit 42, and a dry operating state of the active antenna is determined, and a corresponding open-circuit signal is generated by the voltage comparing unit 43 according to a comparison result and output as an antenna state detection signal.
In one embodiment, the voltage comparing unit 43 may be a comparing circuit composed of the comparator U1 and its peripheral devices, for example, the comparator U1 may adopt a comparator U1 with an open-drain output, which facilitates level shifting, and has a low input offset voltage, which may optimize accuracy.
In one embodiment, the comparison module 40 further includes a pull-up unit 44.
The pull-up unit 44 is connected to the voltage comparison unit 43, and the pull-up unit 44 is configured to provide a pull-up resistance for an output terminal of the voltage comparison unit 43.
In the present embodiment, by providing the pull-up unit 44 at the output terminal of the voltage comparing unit 43,
in one embodiment, the resistance of the pull-up unit 44 is much smaller than the resistance of the threshold setting unit 42, for example, the resistance of the pull-up unit 44 is smaller than one tenth of the resistance of the threshold setting unit 42.
In one embodiment, referring to fig. 2, the feeding sampling unit 41 includes: a second resistor R2 and a third resistor R3.
Specifically, a first end of the second resistor R2 is connected to the antenna power supply port VCC _ SYS, a second end of the second resistor R2 and a first end of the third resistor R3 are commonly connected to the inverting input terminal of the voltage comparing unit 43, and a second end of the third resistor R3 is grounded.
In this embodiment, the second resistor R2 and the third resistor R3 form a voltage divider circuit, which divides the voltage of the antenna power supply port VCC _ SYS and outputs the divided voltage to the inverting input terminal of the voltage comparison unit 43.
In one embodiment, referring to fig. 2, the threshold setting unit 42 includes: a fourth resistor R4 and a fifth resistor R5.
Specifically, a first end of the fourth resistor R4 is connected to the antenna LOAD port VCC _ LOAD, a second end of the fourth resistor R4 and a first end of the fifth resistor R5 are commonly connected to the non-inverting input terminal of the voltage comparing unit 43, and a second end of the fifth resistor R5 is connected to the output terminal of the voltage comparing unit 43.
In this embodiment, the fourth resistor R4 and the fifth resistor R5 form a voltage divider circuit, which divides the voltage of the antenna LOAD port VCC _ LOAD and outputs the divided voltage to the non-inverting input terminal of the voltage comparing unit 43.
In one embodiment, the voltage comparison unit 43 is a comparator.
In this embodiment, the comparator may be a comparator with an open-drain output, which facilitates level shifting, and has a low input offset voltage, which can optimize accuracy.
Referring to fig. 2, the voltage comparing unit 43 includes a comparator U1, a non-inverting input terminal of the comparator U1 is connected to a common node of the fourth resistor R4 and the fifth resistor R5, an inverting input terminal of the comparator U1 is connected to a common node of the second resistor R2 and the third resistor R3, and an output terminal of the comparator U1 is connected to the other terminal of the fifth resistor R5.
In one embodiment, the shunt module 20 may be comprised of one or more resistors.
In one embodiment, referring to fig. 2, the shunting module 20 comprises: first resistance R1, the first end and the antenna power supply port VCC _ SYS of first resistance R1 are connected, and the second end and the antenna LOAD port VCC _ LOAD of first resistance R1 are connected.
In one embodiment, referring to fig. 2, the mirror current module 30 includes: a first transistor Q1, a second transistor Q2, and a mirror current source Vo.
The first end of the mirror current source Vo is connected with the antenna power supply port VCC _ SYS, the second end of the mirror current source Vo, the collector of the first triode Q1, the base of the first triode Q1 and the base of the second triode Q2 are connected in common, the emitter of the first triode Q1 and the emitter of the second triode Q2 are connected in common, and the collector of the second triode Q2 is connected with the antenna LOAD port VCC _ LOAD.
In this embodiment, the first transistor Q1 and the second transistor Q2 form a mirror circuit, a current flowing through the mirror current source Vo is reflected at the load power supply port through the mirror circuit, the antenna feed detection circuit detects a change in the mirror current at the load power supply port to determine a working state of the active antenna and outputs a corresponding open circuit detection signal (i.e., an antenna state detection signal), the main control unit receives the open circuit detection signal and then provides corresponding state information to the antenna system, for example, outputs a corresponding level signal to represent the state information of the antenna system, the short circuit detection module 10 provides a short circuit signal (i.e., a corresponding feed short circuit detection signal) when the antenna is in a short circuit, and the main control unit receives the short circuit signal and then turns off the power supply and provides corresponding state information to the antenna system, thereby protecting the antenna system and prompting a user.
In one embodiment, the pull-up unit 44 includes a sixth resistor R6, a first terminal of the sixth resistor R6 is connected to the output terminal of the comparator U1, and a second terminal of the sixth resistor R6 is connected to the pull-up voltage port.
In the present embodiment, the sixth resistor R6 provides a pull-up resistance for the case where the output of the comparator U1 is in a high impedance state.
In one embodiment, too large a pull-up resistor may cause the logic high level of the comparator U1 to exceed the standard, and therefore, the resistance of the sixth resistor R6 is usually set much smaller than the resistance of the fifth resistor R5, R6< < R5, e.g., 10R6 ≦ R5.
The principle of the antenna feed detection circuit will be described with reference to fig. 2 and the circuit structure in the above embodiment.
With the voltage at the non-inverting input of the comparator U1 labeled Vth and the output of the comparator U1 in a logic low state, the equation for the calculation of the voltage Vth at the non-inverting input is derived as follows:
wherein Vth is a voltage of the non-inverting input terminal of the comparator U1, VH is a voltage of the antenna LOAD port VCC _ LOAD when the output of the comparator U1 is in a logic low state, R4 is a resistance value of the fourth resistor R4, and R5 is a resistance value of the fifth resistor R5.
With the comparator U1 uni-directional input pin labeled Vth and the comparator U1 output in a high impedance state, the calculation formula for Vth is derived as follows:
wherein, R6 is the resistance of the sixth resistor R6, Vcc _3v3 is the voltage of the pull-up voltage port, and VL is the voltage of the antenna LOAD port Vcc _ LOAD when the output of the comparator U1 is in a high impedance state.
The Vth value can be obtained according to the above calculation formula, and in the case where the inverted terminal is labeled as Vth, the Vth value is obtained according to
The resistance values of the second resistor R2 and the third resistor R3 can be obtained.
In one embodiment, the short detection module 10 includes: a seventh resistor R7 and an eighth resistor R8.
The first end of the seventh resistor R7 is connected with the antenna power supply port VCC _ SYS, the second end of the seventh resistor R7 and the first end of the eighth resistor R8 are connected together as a feed short-circuit signal output end and connected with the main control unit, and the second end of the eighth resistor R8 is grounded.
In a specific application, the resistance values of the seventh resistor R7 and the eighth resistor R8 can be matched according to the level limit of the detection terminal of the main control unit. For example, if the antenna power supply port VCC _ SYS is an input voltage of 10V and the voltage of the detection terminal of the main control unit is 3.3V, the resistance value R7 of the seventh resistor R7 may be 20K Ω, and the resistance value R8 of the eighth resistor R8 may be 10K Ω.
The embodiment of the application also provides an antenna feed detection device, which comprises the antenna feed detection circuit.
An embodiment of the present application further provides an antenna system, where the antenna system includes: an antenna module; and the antenna feeding detection circuit according to any one of the above, wherein the antenna feeding detection circuit is connected with the antenna module.
Referring to fig. 3, the antenna power supply unit 620 is used for supplying power to the antenna module 610, and the antenna feed detection circuit 630 may be the antenna feed detection circuit of any of the above embodiments.
The main control unit 640 may be an upper computer, and meanwhile, the main control unit 640 is connected to the antenna power supply unit 620 and the interactive display unit 650, the main control unit 640 may determine the operating state of the antenna system according to the levels of the feed short circuit detection signal and the antenna state detection signal, and the interactive display unit 650 is configured to display the corresponding operating state.
Further, when the main control unit 640 determines that the antenna is short-circuited, the antenna power supply unit 620 is controlled to be powered off, and the interactive display unit 650 displays corresponding status information, thereby protecting the antenna system and prompting a user.
The embodiment of the application provides an antenna feed detection circuit, an antenna feed detection device and an antenna system, wherein the voltage of an antenna power supply port is sampled through a short circuit detection module, and a feed short circuit detection signal is generated according to the sampled voltage; the shunt module is arranged between the antenna power supply port and the antenna load port, the current of the antenna power supply port is subjected to mirror image processing through the mirror image current module so as to adjust the current of the antenna load port, finally, the voltage of the antenna power supply port is sampled through the comparison module to obtain a voltage sampling signal, a reference threshold voltage signal is generated according to the voltage of the antenna load port, the voltage sampling signal is compared with the reference threshold voltage signal, an antenna state detection signal is generated according to a comparison result, and the problem that the antenna state existing in the installation or debugging process of the existing active antenna is difficult to detect is solved.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules, so as to perform all or part of the functions described above. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, a module or a unit may be divided into only one logical function, and may be implemented in other ways, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, in accordance with legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunications signals.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. An antenna feed detection circuit, comprising:
the short circuit detection module is connected with the antenna power supply port and used for sampling the voltage of the antenna power supply port and generating a feed short circuit detection signal according to the sampled voltage;
the shunt module is arranged between the antenna power supply port and the antenna load port;
the image current module is connected with the antenna power supply port, the antenna load port and the shunt module, and is used for generating image current according to the voltage of the antenna power supply port and regulating the voltage of the antenna load port;
and the comparison module is connected with the antenna power supply port and the antenna load port and used for sampling the voltage of the antenna power supply port to obtain a voltage sampling signal, generating a reference threshold voltage signal according to the voltage of the antenna load port, comparing the voltage sampling signal with the reference threshold voltage signal and generating an antenna state detection signal according to a comparison result.
2. The antenna feed detection circuit of claim 1, wherein the comparison module comprises:
the feed sampling unit is connected with the antenna power supply port and used for sampling the voltage of the antenna power supply port to obtain a voltage sampling signal;
a threshold setting unit, connected to the antenna load port, for generating the reference threshold voltage according to a voltage of the antenna load port;
and the voltage comparison unit is connected with the threshold setting unit and the feed sampling unit, compares the voltage sampling signal with a reference threshold voltage and generates an antenna state detection signal.
3. The antenna feed detection circuit of claim 2, wherein the comparison module further comprises:
and the pull-up unit is connected with the voltage comparison unit and is used for providing a pull-up resistor for the output end of the voltage comparison unit.
4. The antenna feed detection circuit of claim 2, wherein the feed sampling unit comprises: a second resistor and a third resistor;
the first end of the second resistor is connected with the antenna power supply port, the second end of the second resistor and the first end of the third resistor are connected to the inverting input end of the voltage comparison unit in a shared mode, and the second end of the third resistor is grounded.
5. The antenna feed detection circuit of claim 2, wherein the threshold setting unit comprises: a fourth resistor and a fifth resistor;
the first end of the fourth resistor is connected with the antenna load port, the second end of the fourth resistor and the first end of the fifth resistor are connected to the positive phase input end of the voltage comparison unit in common, and the second end of the fifth resistor is connected with the output end of the voltage comparison unit.
6. The antenna feed detection circuit of claim 2, wherein the voltage comparison unit is a comparator.
7. The antenna feed detection circuit of claim 1, wherein the shunt module comprises: the first end of the first resistor is connected with the antenna power supply port, and the second end of the first resistor is connected with the antenna load port.
8. The antenna feed detection circuit of claim 1, wherein the mirror current module comprises: the device comprises a first triode, a second triode and a mirror current source;
the first end of the mirror current source is connected with the antenna power supply port, the second end of the mirror current source, the collector electrode of the first triode, the base electrode of the first triode and the base electrode of the second triode are connected together, the emitter electrode of the first triode is grounded together with the emitter electrode of the second triode, and the collector electrode of the second triode is connected with the antenna load port.
9. An antenna feed detection arrangement, characterized in that it comprises an antenna feed detection circuit according to any of claims 1-8.
10. An antenna system, characterized in that the antenna system comprises: an antenna module; and the antenna feed detection circuit according to any one of claims 1 to 8, connected to the antenna module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123121256.2U CN216718651U (en) | 2021-12-13 | 2021-12-13 | Antenna feed detection circuit, antenna feed detection device and antenna system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123121256.2U CN216718651U (en) | 2021-12-13 | 2021-12-13 | Antenna feed detection circuit, antenna feed detection device and antenna system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216718651U true CN216718651U (en) | 2022-06-10 |
Family
ID=81884050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123121256.2U Active CN216718651U (en) | 2021-12-13 | 2021-12-13 | Antenna feed detection circuit, antenna feed detection device and antenna system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216718651U (en) |
-
2021
- 2021-12-13 CN CN202123121256.2U patent/CN216718651U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10983152B2 (en) | USB data pin impedance detection | |
| US11258280B2 (en) | Mobile terminal, peripheral device, and charging method thereof | |
| CN111463842B (en) | Electronic equipment and communication method thereof | |
| US8525484B2 (en) | Charger and portable device having the same | |
| US9547337B2 (en) | Portable device and peripheral extension dock | |
| US9312576B2 (en) | Portable electronic devices capable of obtaining charging current value of charger and charging method thereof | |
| US20070024239A1 (en) | Data cable for detecting power source automatically | |
| CN103064489A (en) | Method for selecting internal circuit according to conditions of universal serial bus (USB) interface and terminal | |
| JP6714469B2 (en) | Electronic device and control method thereof | |
| CN108228509B (en) | USB interface switching device and electronic equipment | |
| CN103683348B (en) | There is the electronic installation of power consumption detecting function | |
| WO2021008488A1 (en) | Method for detecting channel impedance, charging interface detection circuit structure, and electronic device | |
| US9787089B2 (en) | Apparatus and method for a mobile router to receive power from a plurality of power supplies | |
| US20130163437A1 (en) | Network card detecting circuit | |
| CN115525099B (en) | Terminal equipment and method for detecting keyboard access | |
| CN117388728B (en) | Battery detection circuit, method and electronic equipment | |
| CN216718651U (en) | Antenna feed detection circuit, antenna feed detection device and antenna system | |
| US10411466B2 (en) | Apparatus and method for a mobile router to receive power from a plurality of power supplies | |
| CN101573676A (en) | Power control for serial bus peripheral device | |
| CN106921192A (en) | Terminal and electricity sharing method | |
| CN114217243A (en) | Antenna feed detection circuit, antenna feed detection device and antenna system | |
| US6796501B2 (en) | Smart card reader circuit and method of monitoring | |
| CN214375036U (en) | Mobile device test system | |
| CN114285128A (en) | Outdoor equipment power supply control circuit, outdoor equipment power supply system and outdoor equipment | |
| TWI692165B (en) | A battery power supplying system and a method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |