WO2016206515A1

WO2016206515A1 - Antenna device and electronic device

Info

Publication number: WO2016206515A1
Application number: PCT/CN2016/083474
Authority: WO
Inventors: 李东声
Original assignee: 天地融科技股份有限公司
Priority date: 2015-06-24
Filing date: 2016-05-26
Publication date: 2016-12-29
Also published as: CN106329157A; CN106329157B

Abstract

Provided are an antenna device and an electronic device. The antenna device comprises an antenna, an output port, a switching module connected between the antenna and the output port, a control module, a positive voltage generation module, and a negative voltage generation module, wherein an output end of one of the negative voltage generation module and the positive voltage generation module is connected to the switching module, and an output end of the other one of the negative voltage generation module and the positive voltage generation module is connected to a junction through the control module; the voltage of the output end of the negative voltage generation module is a negative voltage; the voltage of the output end of the positive voltage generation module is a positive voltage; the control module is set to turn on or off the connection between the junction and the output end of the other one of the negative voltage generation module and the positive voltage generation module under control; and the switching module is used to turn on or off the connection between the antenna and the output port under control at least according to the voltage of the junction.

Description

Antenna device and electronic device

Technical field

The present invention relates to the field of electronic technologies, and in particular, to an antenna device and an electronic device.

Background technique

At present, mobile communication terminals are gradually developing in the direction of miniaturization, multi-band, multi-function, multi-standard and low-cost. Therefore, multi-antenna applications are becoming more and more widespread. For example, it can be applied in a mobile phone, and the CPU controls the opening and closing of the antenna signal to complete switching of multiple antennas, and one or more of the multiple antennas are connected or disconnected from the same receiving module. Alternatively, it is also possible to control the connection between the same antenna and different receiving modules. In addition, in the time-division communication system, the transmission and reception selection is required, and in order to improve the communication quality, diversity transmission and diversity reception are required, and the two antennas need to receive the air signal at the same time, so that the antenna switch is required to connect the two antennas to the receiving module. . However, an appropriate antenna switch for turning on or off the antenna signal has not been proposed in the related art.

Summary of the invention

The present invention is directed to solving the above problems.

The main object of the present invention is to provide an antenna device

Another object of the present invention is to provide an electronic device.

In order to achieve the above object, the technical solution of the present invention is specifically implemented as follows:

An aspect of the present invention provides an antenna device including: an antenna, an output port, a switch module connected between the antenna and the output port, a control module, a positive voltage generating module, and a negative voltage generating module, wherein the negative voltage generating module and The output of one of the positive voltage generating modules is connected to the switch module, and the output of the other of the negative voltage generating module and the positive voltage generating module is connected to the connection point through the control module, and the connection point is a negative voltage generating module and a positive voltage generating a connection point between the output end of the module and the switch module; a negative voltage generating module whose voltage at the output terminal is a negative voltage; a positive voltage generating module whose voltage at the output terminal is a positive voltage; and a control module that is set to be controlled to conduct Or shutting off the connection between the connection point and the output of the negative voltage generating module and the other of the positive voltage generating modules; the switching module for controlling the antenna to be turned on or off at least according to the voltage of the connection point The connection between the ports.

Optionally, the control module includes: a signal receiving module, configured to receive a first control signal, and output a second control signal corresponding to the first control signal; and a switch selection module, configured to be turned on under the control of the second control signal Or turn off the connection between the output of the negative voltage generating module and the other of the positive voltage generating modules and the connection point.

Optionally, the switch selection module includes: a first connection end connected to the connection point; and a second connection end, and a negative voltage connection The raw module is connected to the output of the other of the positive voltage generating modules; the first control end is connected to the signal receiving module and configured to turn on the first connecting end and the second connecting end under the control of the second control signal Or shut down.

Optionally, the switch module includes: a first on-off module disposed between the first port of the antenna and the first port of the output port, and configured to be based on a voltage of the connection point, a voltage of the first port of the antenna, and an output port The voltage of the first port is controlled to be in an on state or an off state; the second on/off module is disposed between the second port of the antenna and the second port of the output port, and is configured to be based on the voltage of the connection point The voltage of the second port of the antenna and the voltage of the second port of the output port are controlled to be in an on state or an off state; wherein the first on-off module and the second on-off module are simultaneously in an on state, and When the first on-off module and the second on-off module are in an on state, a path of the first port of the antenna to the first port of the output port and a path of the second port of the output port to the second port of the antenna are turned on, Alternatively, the path of the second port of the antenna to the second port of the output port and the path of the first port of the output port to the first port of the antenna are turned on.

Optionally, the first on-off module includes: a first connection end, a second connection end, and a control end; the first connection end of the first on-off module is configured to be connected to the first port of the antenna, and the first on-off module The second connection end is configured to be connected to the first port of the output port, and the control end of the first on-off module is configured to be turned on according to the voltage of the connection point, the voltage of the first port of the antenna, and the voltage of the first port of the output port. Or turn off the path between the first port of the antenna and the first port of the output port.

Optionally, the second on-off module includes: a first connection end, a second connection end, and a control end; the first connection end of the second on-off module is configured to be connected to the second port of the antenna, and the second on-off module The second connection end is configured to be connected to the second port of the output port, and the control end of the second on-off module is configured to be turned on according to the voltage of the connection point, the voltage of the second port of the antenna, and the voltage of the second port of the output port. Or turn off the path between the second port of the antenna and the second port of the output port.

Optionally, the antenna is a non-contact sensing antenna; the positive voltage generating module includes: an input end connected to the antenna; and a rectifying module connected between the input end and the output end of the positive voltage generating module, configured to output an alternating current signal to the antenna The rectification is performed such that the voltage at the output of the positive voltage generating module is positive.

Optionally, the method further includes: a first capacitor, one end of which is grounded, and the other end is connected between the rectifier module of the positive voltage generating module and the output of the positive voltage generating module.

Optionally, the antenna is a non-contact sensing antenna; the negative voltage generating module includes: an input end connected to the antenna; and a rectifying module connected between the input end and the output end of the negative voltage generating module, configured to output an alternating signal to the antenna The rectification is performed such that the voltage at the output of the negative voltage generating module is negative.

Optionally, the antenna device further includes: a second capacitor, one end of which is grounded, and the other end is connected between the rectifier module of the negative voltage generating module and the output of the negative voltage generating module.

According to another aspect of the present invention, an electronic device including the antenna device described above is provided.

It can be seen from the technical solution provided by the present invention that the present invention provides an antenna device having a positive voltage generating module and a negative voltage generating module, and controlling one of the positive voltage generating module and the negative voltage generating module through the control module It is connected to the switch module, so that the switch module can be controlled to be turned on or off, thereby enabling the antenna to be turned off.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention, Those of ordinary skill in the art will be able to obtain other figures from these drawings without the inventive effort.

1 is a schematic structural diagram of an antenna apparatus according to Embodiment 1 of the present invention;

2 is a schematic structural diagram of another antenna device according to Embodiment 1 of the present invention;

3 is a schematic structural diagram of an optional antenna device according to Embodiment 1 of the present invention;

4 is a schematic structural diagram of an optional antenna device according to Embodiment 1 of the present invention;

FIG. 5 is a schematic structural diagram of an optional switch module according to Embodiment 1 of the present invention; FIG.

FIG. 6 is a schematic diagram of an optional antenna and an output port connection according to Embodiment 1 of the present invention; FIG.

FIG. 7 is a schematic structural diagram of an optional antenna device according to Embodiment 1 of the present invention; FIG.

8 is a schematic structural diagram of an optional circuit of a rectifier module of a positive voltage generating module according to Embodiment 1 of the present invention;

9 is a comparison diagram of voltage waveforms of an input terminal and an output terminal of a positive voltage generating module in the case of using the rectifier module shown in FIG. 8;

10 is a schematic structural diagram of another optional circuit of a rectifier module of a positive voltage generating module according to Embodiment 1 of the present invention;

Figure 11 is a comparison diagram of voltage waveforms at respective points in the case where the rectifier module shown in Figure 10 is used;

12 is a comparison diagram of voltage waveforms at the output end of the positive voltage generating module before and after the first capacitor;

FIG. 13 is a schematic structural diagram of an optional antenna device according to Embodiment 1 of the present invention; FIG.

14 is a schematic structural diagram of an optional circuit of a rectifier module of a negative voltage generating module according to Embodiment 1 of the present invention;

Figure 15 is a comparison diagram of voltage waveforms of the output terminals of the negative voltage generating module before and after using the second capacitor;

FIG. 16 is a schematic diagram of an optional circuit of an antenna apparatus according to Embodiment 1 of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", " The orientation or positional relationship of the indications of "upright", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present invention and The simplification of the description is not intended to limit or imply that the device or component that is referred to has a particular orientation, is constructed and operated in a particular orientation, and thus is not to be construed as limiting. Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or quantity or location.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components. The specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Example 1

This embodiment provides an antenna device.

FIG. 1 and FIG. 2 are schematic diagrams showing the structure of an antenna apparatus according to an embodiment of the present invention. As shown in FIGS. 1 and 2, the antenna apparatus mainly includes an antenna 10, an output port 20, and a switch connected between the antenna 10 and the output port 20. Module 30, control module 40, positive voltage generating module 50 and negative voltage generating module 60.

In this embodiment, the output port 20 is an interface for connecting the antenna device to the external device. For example, the antenna device can be connected to the receiving module through the output port 20, and the antenna 10 transmits the received signal to the receiving module through the output port 20, and the receiving module will The received signal is sent to a subsequent demodulation module for demodulation.

In this embodiment, the negative voltage generating module 60 has a voltage at the output end 601 of a negative voltage; the positive voltage generating module 50 has a positive voltage at the output end 501 thereof; and the positive voltage generating module 50 and the negative voltage generating module 60 The output of one of the outputs is connected to the switch module 30, and the output of the other of the positive voltage generating module 50 and the negative voltage generating module 60 is connected to the connection point 100 through the control module 40. The connection point 100 is a positive voltage generating module 50 and a negative terminal. A connection point of the output of one of the voltage generating modules 60 to the switch module 30. Control module 40, configured to be controlled to turn on or off a connection between the contact 100 and the output of the other of the positive voltage generating module 50 and the negative voltage generating module 60; the switch module 30 for controlling the antenna 10 to be turned on or off at least according to the voltage of the connection point 100 The connection to the output port 20.

In this embodiment, as shown in FIG. 1 , the output end 601 of the negative voltage generating module 60 and the switch module 30 may be directly connected, and the output end 501 of the positive voltage generating module 50 is connected to the switch module 30 through the control module 40 . In this embodiment, the output terminals of the negative voltage generating module 60 and the positive voltage generating module 50 are connected to the same end of the switch module 30, that is, the output terminal of the positive voltage generating module 50 is connected to the switch module 30 and the negative voltage through the control module 40. The connection point 100 of the module 60 is generated, and the control module 40 controlledly turns on or off the connection between the output of the positive voltage generating module 50 and the connection point 30. Alternatively, as shown in FIG. 2, the output 501 of the positive voltage generating module 50 may be directly connected to the switch module 30, and the output 601 of the negative voltage generating module 60 may be connected to the connection point 100 by the control module 40. In this embodiment, the output terminals of the negative voltage generating module 60 and the positive voltage generating module 50 are connected to the same end of the switch module 30, that is, the output terminal of the negative voltage generating module 60 is connected to the switch module 30 and the positive voltage through the control module 40. The output 501 of the generation module 50 is connected to the point 100, and the control module 40 controlledly turns on or off the connection between the output 601 of the negative voltage generating module 60 and the connection point 100.

In the antenna device provided in this embodiment, one of the positive voltage generating module 50 and the negative voltage generating module 60 is directly connected to the switch module 30, and the other module of the positive voltage generating module 50 and the negative voltage generating module 60 passes through the control module 40. Connected to the switch module 30, it is possible to control whether the other module of the positive voltage generating module 50 and the negative voltage generating module 60 is connected to the switch module 30 through the control module 40, so that the voltage input by the switch module 30 can be controlled, thereby controlling the switch module. The turning on or off of 30 allows the breaking of the antenna.

In the embodiment of the present invention, the control module 40 is configured to turn on or off another module of the positive voltage generating module 50 and the negative voltage generating module 60 (the positive voltage generating module 50 in FIG. 1 or the negative voltage in FIG. 2) The generating module 60) can be implemented, for example, by a relay, or can also be implemented with an analog switch to save space. Therefore, in an optional implementation of the embodiment of the present invention, as shown in FIG. 3, the control module 40 may include a signal receiving module 401 and a switch selecting module 403. The signal receiving module 401 is configured to receive a first control signal, and output a second control signal corresponding to the first control signal. The switch selection module 403 is configured to turn on or off the negative control under the control of the second control signal. The voltage generating module 60 and the module in the positive voltage generating module 50 connected to the switch module 30 through the control module 40 (for example, the positive voltage generating module 50 in FIG. 1 or the negative voltage generating module 60 in FIG. 2, shown in FIG. What is shown is the connection between the output of the positive voltage generating module 50) and the connection point 100. In this alternative embodiment, the first control signal may be a control signal input by an external user, the control signal may be a digital logic signal, and the second control signal may be a voltage signal, and the signal receiving module 401 receives the number input by the user. After the logic signal, according to the meaning of the digital logic signal, a corresponding voltage signal is generated and output, and the switch selection module 403 is controlled by the voltage signal. On and off. Through the optional implementation, the signal receiving module 401 can generate and output a corresponding control signal to control the on/off of the switch selection module 403 according to the received control signal, so that various types of control signals input by the user can be conveniently received.

In an optional implementation of the embodiment of the present invention, the switch selection module 403 can select an electronic switch including three ends, that is, a first connection end, a second connection end, and a first control end. The first connection end is connected to the connection point 100; the second connection end is connected to the other of the negative voltage generating module 60 and the positive voltage generating module 50 (ie, the positive voltage generating module 50 and the negative voltage generating module 60 through the control module 40). The module connected to the switch module 30, that is, the output of the positive voltage generating module 50 of FIG. 1 or the negative voltage generating module 60 of FIG. 2; the first control terminal is connected to the signal receiving module 401 and configured to be The first connection end and the second connection end are turned on or off under the control of the second control signal. At the time of conduction, the output 501 of the positive voltage generating module 50 of FIG. 1 or the output 601 of the negative voltage generating module 60 of FIG. 2 is connected to the connection point 100. With this alternative embodiment, the switch selection module 403 can be implemented in a sheet form, thereby saving space.

In a specific application, the switch selection module 403 can be implemented by using a MOS transistor, for example, an enhanced PMOS transistor or an NMOS transistor. For example, in FIG. 4, a PMOS transistor (Q1) is used to control the positive voltage generating module 50 and the switch. The connection of the module 30, the G terminal (ie, the control terminal) of Q1 is connected to the signal receiving module 401, the S terminal is connected to the output terminal of the positive voltage generating module 50, and the D terminal is connected to the connection point 100 of the switching module 30 and the negative voltage generating module 60. connection.

When the signal receiving module 401 receives a control signal (which may be a digital logic signal) that turns off the connection between the output of the positive voltage generating module 50 and the connection point 100, the signal receiving module 401 outputs a high level. In a specific application, the level value output by the signal receiving module 401 is related to the level value of the output end of the positive voltage generating module 50, and may be specifically set according to the on/off condition of the PMOS transistor, so that the signal receiving module 401 outputs a high level. The level value of the output terminal of the positive voltage generating module 50 can satisfy the cutoff condition of the PMOS transistor. For example, the level value of the high level output by the signal receiving module 401 can be made equal to or greater than the level value of the output end of the positive voltage generating module 50. Or, the level value of the high level output by the signal receiving module 401 is smaller than the level value of the output end of the positive voltage generating module 50, but the difference between the two is greater than the turn-on voltage Vth of Q1 (ie, Vg - Vs < 0 and Vgs >Vth, where Vth is the turn-on voltage and Vth is a negative value, and Vs is the voltage of the S terminal of Q1, that is, the voltage value of the output terminal of the positive voltage generating module 50, Vgs=Vg−Vs), then the signal receiving module 401 When the output level is high, Q1 satisfies the cut-off condition, the S terminal is disconnected from the D terminal, the connection between the output terminal of the positive voltage generating module 50 and the connection point 100 is turned off, and the output terminal of the negative voltage generating module 60 is connected to the switch module 30. ,even Voltage at the point 100 is negative.

When the signal receiving module 401 receives a control signal that connects the output between the positive voltage generating module 50 and the connection point 100 (the control signal may be a digital logic signal), the signal receiving module 401 outputs a low level. In a specific application, the level value output by the signal receiving module 401 is related to the level value of the output of the positive voltage generating module 50. Specifically, it can be set according to the on-off condition of the PMOS transistor, so that the level of the output of the low-level and positive-voltage generating module 50 outputted by the signal receiving module 401 can satisfy the conduction condition of the PMOS transistor. For example, the level value of the low level output by the signal receiving module 401 may be set to be negative, or as long as the G terminal voltage (Vg) of Q1, that is, the low level output by the signal receiving module 401, satisfies the following conditions:

Vg–Vs<0 and Vgs<Vth, where Vth is the turn-on voltage and Vth is negative

Then, Q1 is turned on, the connection from the S end to the D end of Q1 is turned on, the connection between the output end of the positive voltage generating module 50 and the connection point 100 is turned on, and the output end of the positive voltage generating module 50 is connected to the switch module 30, and connected. The voltage value at point 100 is positive.

Of course, it is not limited to this. In a specific application, the switch selection module 403 can also select an enhanced NMOS transistor, which can be set according to the on and off conditions of the enhanced NMOS transistor, and details are not described herein.

The antenna 10 generally uses an inductive antenna whose output is an alternating current signal. In this case, the antenna 10 can have two ports for outputting signals, and the two ports are connected through the switch module 30, the output port 20, and the output port 20. The external modules form a loop. Therefore, in an optional embodiment of the embodiment of the present invention, as shown in FIG. 5, the switch module 30 may include: a first on-off module 31 and a second on-off module 33. The first on-off module 31 is disposed between the first port of the antenna 10 and the first port of the output port 20, and is configured according to the voltage of the connection point 100, the voltage of the first port of the antenna 10, and the output port 20. The voltage of the first port is controlled to be in an on state or an off state; the second on-off module 33 is disposed between the second port of the antenna 10 and the second port of the output port 20, and is configured to be connected according to the connection The voltage of the point 100, the voltage of the second port of the antenna 10, and the voltage of the second port of the output port 20 are controlled to be in an on state or an off state; wherein the first on-off module 31 and the second on-off module 33 is simultaneously in an on state, and the first port of the antenna 10 is connected to the first port of the output port 20 and the output port 20 is in a state where the first on-off module 31 and the second on-off module 33 are in an on state. The path of the second port to the second port of the antenna 10 is turned on, or the path of the second port of the antenna 10 to the second port of the output port 20 and the path of the first port of the output port 20 to the first port of the antenna 10 through. That is, in the present embodiment, the two paths from the antenna 10 to the output port 20: the first path 101 and the second path 102 are simultaneously turned on, and in the case of conduction, the first path 101 and the second path 102 are both One-way conduction, and the two are turned in opposite directions to form a loop, that is, assuming that current flows from the first port of the antenna 10, reaches the first port of the output port 20 via the first path 101, and then passes through the output port 20, Flowing out from the second port of the output port 20 (may be passed through other modules, specifically related to the electronic device of the antenna device application, not described in this embodiment), and then flowing from the second port of the antenna 10 via the second path 20 The antenna 10 is returned to form a current loop. At least one of the first on-off module 31 or the second on-off module 33 is in an off state, that is, a path from the first port of the antenna 10 to the first port of the output port 20, and the second port of the output port 20 to the antenna 10 The path of the second port is turned on, the path of the second port of the antenna 10 to the path of the second port of the output port 20, and the output port 20 At least one of the first port to the first port of the antenna 10 is turned off, the first path 101 and the second path 102 are unable to form a loop, and the connection between the antenna 10 and the output port 20 is broken. With this alternative embodiment, the solution provided by this embodiment can be applied to the case where the antenna 10 has two ports for outputting signals, which extends the applicable scope of the technical solution provided by this embodiment.

Of course, it is not limited thereto, and the case where the antenna 10 has only one port for outputting signals, that is, the case where there is only one path between the antenna 10 and the output port 20, the same applies to the embodiment. In this case, the switch module 30 is directly disposed between the antenna 10 and the single path of the output port 20. The antenna 10 and the output port 20 (or other modules connected to the output port 20, which may be determined according to the electronic device of the antenna device application) may be commonly used. A current loop is formed, which is not described in detail in this embodiment.

In an optional embodiment of the embodiment of the present invention, the first on-off module 31 can select an electronic switch including three ends, that is, a first connection end, a second connection end, and a control end. The first connection end of the first on-off module 31 is configured to be connected to the first port of the antenna 10, and the second connection end of the first on-off module 31 is configured to be connected to the first port of the output port 20, the first connection The control end of the breaking module 31 is configured to turn on or off the first port and the output port 20 of the antenna 10 according to the voltage of the connection point 100, the voltage of the first port of the antenna 10, and the voltage of the first port of the output port 20. The path between the first ports.

In an optional embodiment of the embodiment of the present invention, the second on-off module 33 may also select an electronic switch including three ends, that is, a first connection end, a second connection end, and a control end. The first connection end of the second on-off module 33 is configured to be connected to the second port of the antenna 10, and the second connection end of the second on-off module 33 is configured to be connected to the second port of the output port 20, the second connection The control end of the breaking module 33 is configured to turn on or off the second port and the output port 20 of the antenna 10 according to the voltage of the connection point 100, the voltage of the second port of the antenna 10, and the voltage of the second port of the output port 20. The path between the second ports.

In a specific application, the first on-off module 31 and the second on-off module 33 can be implemented by using an enhanced PMOS transistor or an NMOS transistor. For example, as shown in FIG. 6, the first on-off module 31 and the second on-off module The modules 33 are respectively implemented by using an enhanced PMOS transistor, that is, Q2 and Q3 in FIG. 6, wherein the G terminal (ie, the control terminal) of Q2 is connected to the connection point 100, the S terminal is connected to the first port of the antenna 10, and the D terminal is connected. The first port of the output port 20 is connected. The G terminal (ie, the control terminal) of Q3 is connected to the connection point 100, the S terminal is connected to the second port of the antenna 10, and the D terminal is connected to the second port of the output port 20.

The level value of the connection point 100 is related to the level of the output of the positive voltage generating module 50 and the output of the negative voltage generating module 60. In a specific application, if the first on-off module 31 and the second on-off module 33 are employed The enhancement type PMOS transistor can set the level value of the output end of the positive voltage generating module 50 to be greater than the maximum value of the level of the first port or the second port of the antenna 10 according to the on-off condition of the enhanced PMOS transistor, or Less than or equal to the first of the antenna 10 The maximum value of the level of the port or the second port, and the absolute value of the difference from the maximum value is less than the absolute value of Vth.

Assuming that the voltage of the first port of the current antenna 10 is in the positive half cycle, and the voltage of the second port is in the negative half cycle, that is, the voltage of the first port of the antenna 10 is positive, and the voltage of the second port is negative, the communication of Q2 and Q3 is The break condition is:

When the level of the connection point 100 is high (ie, the output of the positive voltage generating module 50 is in communication with the path of the connection point 100), the voltage at the S terminal of Q2 is positive, Vg-Vs<0, but Vgs>Vth, The conduction condition is not satisfied, so Q2 is cut off. The voltage at the S terminal of Q3 is negative, Vg-Vs>0, and the conduction condition is not satisfied. Therefore, Q2 is also cut off.

When the level of the connection point 100 is low, the voltage at the S terminal of Q2 is positive, Vg-Vs<0, and Vgs<Vth, which satisfies the conduction condition. Therefore, Q2 is turned on, and the path of Q2 from the S terminal to the D terminal. Connected. The voltage at the S terminal of Q3 is negative, and the voltage at the D terminal is higher than the voltage at the S terminal. Therefore, Q3 is equivalent to a diode, and the path from the D terminal to the S terminal of Q3 is connected, thereby forming a first port from the antenna 10 to the output port 20. The first port is then routed from the second port of the output port 20 to the second port of the antenna 10. The signal received by antenna 10 is transmitted to output port 20.

In an optional implementation of the embodiment of the present invention, the antenna 10 may be a non-contact sensing antenna. Since the non-contact sensing antenna is an inductive coil, when the antenna 10 receives a signal, an alternating current signal is generated, and the alternating current signal has electrical energy. In this alternative embodiment, a positive voltage is obtained using the AC signal generated by the antenna 10. Therefore, in this alternative embodiment, as shown in FIG. 7, the positive voltage generating module 50 may include an input terminal 502 connected to the antenna 10, and a rectifying module 503 connected to the input terminal 502 and output of the positive voltage generating module 50. Between the terminals 501, the AC signal output from the antenna 10 is rectified so that the voltage of the output terminal 501 of the positive voltage generating module 50 is positive. With this alternative embodiment, the electrical energy output by the antenna 10 can be utilized to generate a positive voltage without the need for additional components (eg, batteries) to obtain a positive voltage, saving cost and simplifying circuit complexity.

The rectification module 503 of the positive voltage generating module 50 can have various implementations. For example, in an alternative embodiment of the embodiment of the present invention, the bridge rectifier circuit shown in FIG. 8 can be used, in FIG. Rfz represents a component that may be accessed at the output end, and the component to which it is specifically connected is not concerned in the embodiment of the present invention, and therefore, it will not be described. The working principle is as follows: when E2 (ie, antenna) is positive half cycle, forward voltage is applied to diodes D1 and D3, D1 and D3 are turned on; reverse voltage is applied to diodes D2 and D4, D2 and D4 are cut off, and E2 is formed in the circuit. The D1, Rfz, and D3 energizing circuits form a half-wave rectified voltage that is positively negative and negative on Rfz, and the voltage at the output terminal 501 of the rectifying module 503 is positive; when E2 is a negative half cycle, a forward voltage is applied to D2 and D4. D2 and D4 are turned on; reverse voltage is applied to D1 and D3, D1 and D3 are cut off, and E2, D2, Rfz, and D4 are energized in the circuit, and the other half-wave rectified voltage is formed on Rfz. The voltage at the output 501 of the rectifier module 503 is still positive. Repeating this way results in a full-wave rectified voltage on Rfz (i.e., at output 501). Taking a sine wave as an example, (a) in FIG. 9 is a voltage waveform diagram of the E2 output, and (b) in FIG. 9 is a voltage waveform diagram of the output terminal 501, as shown in FIG. The bridge rectifier circuit can make the voltage at the output 501 always positive.

Alternatively, the rectifying module 503 can also adopt a full-wave rectifying circuit as shown in FIG. 10. In the full-wave rectifying circuit shown in FIG. 10, a tap is drawn in the middle of E2, and E2 is divided into two symmetrical windings, thereby drawing equal sizes. However, the two voltages E2a and E2b having opposite polarities constitute E2a, D1, Rfz and E2b, D2 and Rfz, and two energizing circuits. Next, the operation principle of the full-wave rectifying circuit shown in Fig. 10 will be described with reference to Fig. 11. E2 outputs the voltage waveform shown in (a) of Figure 11, in the range of 0 to π, E2a is the forward voltage of D1, D1 is turned on, and the voltage is positive and negative on Rfz, see Figure 11. (d); E2b is a reverse voltage for D2 and D2 is not conductive, see (b) in FIG. In π-2π time, E2b is forward voltage to D2, D2 is on, and the voltage obtained on Rfz is still positive and negative, see (d) in Figure 11; E2a is reverse voltage for D1, D1 does not conduct, see (c) in Figure 11. It can be seen that the voltage at the output 501 is always positive.

Of course, it is not limited to the rectifier circuit shown in FIG. 8 and FIG. 10 above. In practical applications, other rectifier circuits may be used to implement the rectifier module 503, as long as it can ensure that the voltage of the output terminal 501 is positive, The embodiment of the invention is not limited.

In an optional embodiment of the embodiment of the present invention, the antenna device may further include a first capacitor 70. As shown in FIG. 7, one end of the first capacitor 70 is grounded, and the other end is connected to the rectifier module of the positive voltage generating module 50. 503 is between the output 501 of the positive voltage generating module 50. Through the first capacitor 70, the voltage of the output terminal 501 can be made to be a constant voltage. As shown in FIG. 12, if the first capacitor 70 is not connected, the voltage waveform of the output terminal 501 is similar to the curve shown by 1201 in the figure, if the connection is made. The first capacitor 70, the voltage waveform of the output terminal 501 is similar to the curve shown by 1202 in the figure. With the present alternative embodiment, the voltage at the output 501 can be fixed near a certain positive voltage value that is less than the maximum voltage value output by the antenna 10, so that the on/off of the switch module 30 can be easily controlled.

In an alternative embodiment of the embodiment of the invention, in the case where the antenna 10 is a non-contact sensing antenna, the AC signal generated by the antenna 10 is used to obtain a negative voltage. Therefore, in this alternative embodiment, as shown in FIG. 13, the negative voltage generating module 60 may include an input terminal 602 connected to the antenna 10, and a rectification module 603 connected to the input terminal 602 and the output of the negative voltage generating module 60. Between the ends 601, the AC signal output from the antenna 10 is rectified so that the voltage at the output 601 of the negative voltage generating module 60 is negative.

In an optional implementation of the embodiment of the present invention, the rectifying module 603 of the negative voltage generating module 60 can be implemented in a similar structure to the rectifying module 503 of the positive voltage generating module 50. For example, as shown in FIG. 14, a bridge can be used. The rectifier circuit is implemented, as shown in FIG. 14, the bridge circuit for implementing the rectifier module 603 of the negative voltage generating module 60 and the bridge circuit for implementing the rectifier module 503 of the positive voltage generating module 50 shown in FIG. The difference is that the direction of each diode in FIG. 14 is opposite to the direction of the corresponding diode in FIG. 8. The principle is similar to that in FIG. 8, and a rectified voltage is formed on Rfz by a bridge rectifier circuit, thereby making a negative voltage. The voltage at the output 601 of the generation module 60 is negative. Of course, the rectifier module 603 of the negative voltage generating module 60 can also be implemented by other circuits, for example, It is implemented by a full-wave rectification circuit similar to that of FIG. 10, and details are not described herein.

The antenna device may further include a second capacitor 80. As shown in FIG. 13, one end of the second capacitor 80 is grounded, and the other end is connected between the rectifier module 603 of the negative voltage generating module 60 and the output terminal 601 of the negative voltage generating module 60. . Through the second capacitor 80, the voltage of the output terminal 601 can be made to be a constant voltage. As shown in FIG. 15, if the second capacitor 80 is not connected, the voltage waveform of the output terminal 601 is similar to the curve shown by 1501 in the figure, if the connection is made. For the second capacitor 80, the voltage waveform of the output terminal 601 is similar to the curve shown by 1502 in the figure. With this alternative embodiment, the voltage at the output 601 can be fixed near a certain negative voltage value that is greater than the minimum voltage value output by the antenna 10, so that the on/off of the switch module 30 can be easily controlled.

16 is an alternative circuit schematic diagram of a wire device according to an embodiment of the present invention. As shown in FIG. 16, the antenna 10 is a non-contact sensing antenna having two

output terminals

11 and 12, and the output port 20 has two input terminals. . The switch module 30 connected between the antenna 10 and the output port 20 includes two PMOS transistors, namely Q1 and Q2, the S terminal of Q1 is connected to one output end of the antenna 10, and the S terminal of Q2 is connected to the other output end of the antenna. The D terminal of Q1 is connected to one input terminal of the output port 20, and the D terminal of Q2 is connected to the other input terminal of the output port 20. The rectifier module 503 of the positive voltage generating module 50 is implemented by diodes D1-D4, and the output of the positive voltage generating module 50 is connected to the control module 40. The control module 40 includes a signal receiving module 401 and a switch selecting module 403. The signal receiving module 401 receives a digital logic signal and outputs a corresponding high level or low level. The switch selecting module 403 is implemented by a PMOS transistor Q3, and the S terminal of the Q3 is connected. The output terminal 503 of the voltage generating module 50 is connected to the signal receiving module 401 at the G terminal, and the D terminal is connected to the G terminal of Q1 and Q2. The rectifier module 603 of the negative voltage generating module 60 is implemented by diodes D5, D6, D8, and D9. The output terminal 603 of the negative voltage generating module 60 is connected in series with a resistor R1 and connected to the G terminals of Q1 and Q2.

Next, the operation principle of the antenna device shown in Fig. 15 will be described by taking the voltage of the output terminal 11 of the antenna 10 at the positive half cycle as an example.

The output terminal 11 is a positive voltage, a forward voltage is applied to the diodes D2 and D4, D2 and D4 are turned on, a reverse voltage is applied to the diodes D1 and D3, D1 and D3 are turned off, and a current flows through the D2 to the output terminal of the positive voltage generating module 50. 501, flowing to the ground (GND) via the capacitor C1, and then flowing back to the antenna 10 from the output terminal 12 to the D4. The voltage at the output terminal 501 is higher than the voltage at GND, and therefore, the voltage at the output terminal 501 is positive. Similarly, the output is positive voltage, forward voltage is applied to diodes D6 and D8, D6 and D8 are turned on, reverse voltage is applied to diodes D5 and D9, D5 and D9 are turned off, current flows to GND through D6, and flows through capacitor C2. The output 601 of the negative voltage generating module 60 flows back to the D8 and from the output 12 to the antenna 10. The voltage at the output terminal 601 is lower than the voltage at GND, and therefore, the voltage at the output terminal 601 is negative.

In the initial state, Q3 is turned off, the current at the output terminal 601 generates a voltage drop through R1, and the voltage value at the G terminal of Q1 and Q2 is the voltage value of the output terminal 601 minus the voltage drop. Therefore, the voltages at the G terminal of Q1 and Q2 are both Negative, the S terminal voltage of Q1 is positive, Q1 satisfies the conduction condition, and the circuit of S1 to D terminal of Q1 is turned on, and passes through output port 20 to Q2. The D terminal is positively charged, the voltage at the S terminal of Q2 is negative, Q2 is equivalent to the diode, and the circuit from the D terminal to the S terminal is turned on, thereby forming a power-on loop from the antenna 10, Q1, the output port 20, and the Q2, and the antenna 10 and The output port 20 is connected. If the signal receiving module 401 receives a digital logic signal indicating that the antenna 10 is disconnected, the signal receiving module 401 outputs a low level, and the S terminal of the Q3 is connected to the output terminal 601 of the positive voltage generating module 60, which is a high level, Q3 Turned on, the levels of the G terminals of Q1 and Q2 are high, Q1 and Q2 satisfy the cutoff condition, Q1 and Q2 are turned off, and the antenna 10 is disconnected from the output port 20. Thereby the connection and disconnection of the antenna 10 is achieved.

In the embodiment of the present invention, the antenna 10 may be a high frequency or ultra high frequency electric wire, or may be an intermediate frequency antenna or a low frequency antenna. For example, it may be an NFC antenna, and the antenna may be disposed in a mobile terminal or in a smart card. Q1, Q2 and Q3 and each diode can be selected according to the frequency of application of antenna 10. For example, Q1, Q2 and Q3 can use PMOS tube of model RMZ001P02, and diodes D1-D4, D5, D6, D8 and D9 can be of model type The diode of the LRB5205-30TIG is not limited in the embodiment of the present invention.

Through the above circuit, the digital signal can be used to control the on and off of the antenna. The voltage loss during conduction is less than 0.3V, the leakage voltage at turn-off is less than 0.2V, and the lossless conduction is achieved at a higher frequency.

Embodiment 2

This embodiment provides an electronic device, which may be a mobile terminal, or may be a smart card or the like.

The electronic device of this embodiment may include the antenna device of any of the alternatives described in Embodiment 1. In addition to the antenna device, the electronic device may include other devices. For example, the smart card may further include a contactless smart chip for processing data received from the antenna and the like. The specific embodiment is not limited.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, it is understood that the foregoing embodiments are illustrative and not restrictive Variations, modifications, alterations and variations of the above-described embodiments are possible within the scope of the invention. The scope of the invention is defined by the appended claims and their equivalents.

Claims

An antenna device, comprising: an antenna, an output port, a switch module connected between the antenna and the output port, a control module, a positive voltage generating module, and a negative voltage generating module, wherein

An output end of the negative voltage generating module and one of the positive voltage generating modules is connected to the switch module, and an output end of the other of the negative voltage generating module and the positive voltage generating module passes through a control module a connection point, where the connection point is a connection point between the negative voltage generating module and an output end of the one of the positive voltage generating modules and the switch module;

The negative voltage generating module has a voltage at a negative end of the output terminal;

The positive voltage generating module has a positive voltage at an output end thereof;

The control module is configured to controlly turn on or off a connection between the connection point and an output of the other of the negative voltage generating module and the positive voltage generating module;

The switch module is configured to controlly turn on or off a connection between the antenna and the output port according to at least a voltage of the connection point.
The antenna device according to claim 1, wherein the control module comprises:

a signal receiving module, configured to receive a first control signal, and output a second control signal corresponding to the first control signal;

a switch selection module, configured to turn on or off the output of the negative voltage generating module and the other of the positive voltage generating modules and the connection point under the control of the second control signal The connection between the two.
The antenna device according to claim 2, wherein the switch selection module comprises:

a first connection end connected to the connection point;

a second connection end connected to the output of the other of the positive voltage generating module and the negative voltage generating module;

The first control end is coupled to the signal receiving module and configured to turn the first connection end and the second connection end on or off under the control of the second control signal.
The antenna device according to any one of claims 1 to 3, wherein the switch module comprises:

a first on-off module disposed between the first port of the antenna and the first port of the output port, and configured to be based on a voltage of the connection point, a voltage of a first port of the antenna, and The voltage of the first port of the output port is controlled to be in an on state or an off state;

a second on-off module disposed between the second port of the antenna and the second port of the output port, and configured to be based on a voltage of the connection point, a voltage of a second port of the antenna, and the The voltage of the second port of the output port is controlled to be in an on state or an off state;

Wherein the first on-off module and the second on-off module are simultaneously in an on state, and when the first on-off module and the second on-off module are in an on state, the antenna a path of the first port to the first port of the output port and a path of the second port of the output port to a second port of the antenna, or a second port of the antenna to the output port The path of the second port and the path of the first port of the output port to the first port of the antenna are turned on.
The antenna device according to claim 4, wherein the first on-off module comprises: a first connection end, a second connection end, and a control end;

The first connection end of the first on-off module is configured to be connected to the first port of the antenna, and the second connection end of the first on-off module is configured to be connected to the first port of the output port, The control end of the first on-off module is configured to turn on or off the antenna according to a voltage of the connection point, a voltage of a first port of the antenna, and a voltage of a first port of the output port A path between a port and a first port of the output port.
The antenna device according to claim 4, wherein the second on-off module comprises: a first connection end, a second connection end, and a control end;

The first connection end of the second on-off module is configured to be connected to the second port of the antenna, and the second connection end of the second on-off module is configured to be connected to the second port of the output port, The control end of the second on-off module is configured to turn on or off the antenna according to a voltage of the connection point, a voltage of a second port of the antenna, and a voltage of a second port of the output port A path between the two ports and the second port of the output port.
The antenna device according to any one of claims 1 to 6, wherein the antenna is a non-contact sensing antenna;

The positive voltage generating module includes:

An input terminal connected to the antenna;

The rectifier module is connected between the input end and the output end of the positive voltage generating module for rectifying the AC signal output by the antenna, so that the voltage of the output end of the positive voltage generating module is positive.
The antenna device according to claim 7, further comprising: a first capacitor, one end of which is grounded, and the other end of which is connected between the rectifying module of the positive voltage generating module and the output of the positive voltage generating module.
The antenna device according to any one of claims 1 to 6, wherein the antenna is a non-contact sensing antenna;

The negative voltage generating module includes:

An input terminal connected to the antenna;

The rectifier module is connected between the input end and the output end of the negative voltage generating module for rectifying the AC signal output by the antenna such that the voltage of the output end of the negative voltage generating module is negative.
The antenna device according to claim 9, wherein said device further comprises: a second capacitor, One end is grounded, and the other end is connected between the rectifier module of the negative voltage generating module and the output of the negative voltage generating module.
An electronic device comprising the antenna device according to any one of claims 1 to 10.