CN218548780U

CN218548780U - Antenna circuit and terminal device

Info

Publication number: CN218548780U
Application number: CN202222819614.5U
Authority: CN
Inventors: 高奇; 方巧勇
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-10-25
Filing date: 2022-10-25
Publication date: 2023-02-28
Anticipated expiration: 2032-10-25

Abstract

The present disclosure relates to an antenna circuit and a terminal device, the circuit including: a suspension antenna; the antenna interface is connected with a feed point on the suspension antenna and used for outputting an antenna signal; the electrostatic protection component is connected with the feeding point and the antenna interface at one end and connected with a ground wire at the other end and used for performing electrostatic protection on an antenna path formed by the connection of the antenna interface and the feeding point; the first inductance assembly is connected in series in a connecting line between the electrostatic protection assembly and the feeding point and used for blocking the antenna signal from being transmitted to the electrostatic protection assembly. The antenna circuit of the embodiment of the disclosure can isolate antenna signals to solve the problem of radiation stray while performing electrostatic protection.

Description

Antenna circuit and terminal device

Technical Field

The present disclosure relates to the field of antennas, and in particular, to an antenna circuit and a terminal device.

Background

Electrostatic discharge (ESD) is an important content for controlling quality of electronic devices, and when electrostatic energy is introduced from a suspended antenna of a terminal device to a feeding point, the electrostatic energy continues to flow into a subsequent stage, and when there is no ESD, an antenna circuit of the subsequent stage is damaged. In the related art, a Transient Voltage Super (TVS) is usually connected to a feeding point, and the TVS has a very good static suppression effect and can protect a subsequent antenna circuit. However, a range of standing wave voltages exist at the feed point of the antenna. When the working voltage of the selected TVS is greater than the standing wave voltage, the electrostatic protection of the TVS has a problem that residual voltage cannot protect the antenna circuit, and when the working voltage of the selected TVS is less than the standing wave voltage, there is a problem of Radiation Stray (RSE) and the performance of the antenna is affected. The TVS is difficult to select types and cannot simultaneously consider ESD and RSE.

SUMMERY OF THE UTILITY MODEL

To overcome the problems in the related art, the present disclosure provides an antenna circuit and a terminal device capable of isolating an antenna signal while performing electrostatic protection to solve the problem of radiation stray.

According to a first aspect of embodiments of the present disclosure, there is provided an antenna circuit, comprising at least:

a suspension antenna;

the antenna interface is connected with a feed point on the suspension antenna and used for outputting an antenna signal;

the electrostatic protection component is connected with the feeding point and the antenna interface at one end and connected with a ground wire at the other end and used for performing electrostatic protection on an antenna path formed by the connection of the antenna interface and the feeding point;

the first inductance assembly is connected in series in a connecting line between the electrostatic protection assembly and the feeding point and used for blocking the antenna signal from being transmitted to the electrostatic protection assembly.

In some embodiments, the feed point, the first inductive component, and the electrostatic protection component form an electrostatic path;

the electrostatic path is used for transmitting the electrostatic energy transmitted to the feeding point to the electrostatic protection component.

In some embodiments, the antenna circuit further comprises a position detection component connected to the first inductive component;

the first inductance component is connected between the electrostatic protection component and the feeding point;

wherein the position detection component is configured to detect position information of a target object such that a transmit power of the hovering antenna can be adjusted based on the position information.

In some embodiments, the antenna circuit does not include the position detection component;

alternatively, the first and second liquid crystal display panels may be,

the electrostatic protection component is connected between the first inductive component and the feed point.

In some embodiments, the antenna circuit further comprises a second inductive component;

the second inductance assembly is connected between the electrostatic protection assembly and the position detection assembly.

In some embodiments, the antenna circuit further comprises a capacitive component:

the capacitor assembly is connected in the antenna path in series, one end of the capacitor assembly is connected with the first inductor assembly and the feeding point, and the other end of the capacitor assembly is connected with the antenna interface.

In some embodiments, the antenna circuit further comprises an impedance tuning component;

the tuning component is connected between the antenna interface and the capacitor component and used for tuning the antenna signal so as to switch the suspension antenna to receive and transmit wireless signals of different frequency bands.

In some embodiments, the first inductive component comprises an inductance, the inductance being between 100 nanohenries and 150 nanohenries.

In some embodiments, the electrostatic protection component comprises a transient diode.

According to a second aspect of the embodiments of the present disclosure, there is provided a terminal device, at least comprising:

a camera assembly;

the antenna circuit as described in the above first aspect; and the suspension antenna in the antenna circuit and the camera assembly are respectively positioned at two opposite ends of the terminal equipment.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

an embodiment antenna circuit of the present disclosure includes: a suspension antenna; the antenna interface is connected with a feed point on the suspension antenna and used for outputting an antenna signal; the electrostatic protection component is connected with the feeding point and the antenna interface at one end and connected with a ground wire at the other end and used for performing electrostatic protection on an antenna path formed by the connection of the antenna interface and the feeding point; the first inductance assembly is connected in series in a connecting line between the electrostatic protection assembly and the feeding point and used for blocking the antenna signal from being transmitted to the electrostatic protection assembly.

That is to say, this antenna circuit of this disclosure embodiment, through the first inductance assembly of series connection in the interconnecting link between electrostatic protection subassembly and the feed point, can obstruct antenna signal transmission to electrostatic protection subassembly to the operating voltage that can solve the TVS of chooseing for use is less than the spurious problem of radiation that standing wave voltage leads to, and then can select TVS more nimble, can solve the spurious problem of radiation when realizing electrostatic protection.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a first schematic diagram of an antenna circuit shown in accordance with an example embodiment.

Fig. 2 is a second schematic diagram of an antenna circuit according to an exemplary embodiment.

Fig. 3 is a third schematic diagram of an antenna circuit according to an exemplary embodiment.

Fig. 4a is a schematic diagram of a position detection assembly of an antenna circuit shown in accordance with an example embodiment.

Fig. 4b is a schematic diagram of a position detection assembly of the antenna circuit shown in accordance with an exemplary embodiment.

Fig. 5 is a schematic diagram illustrating capacitive components of an antenna circuit according to an example embodiment.

Fig. 6 is a schematic diagram of an impedance tuning component of an antenna circuit shown in accordance with an example embodiment.

Fig. 7 is a schematic diagram of an associated antenna circuit shown in accordance with an example embodiment.

Fig. 8 is a schematic diagram of an antenna circuit shown in accordance with an example embodiment.

Figure 9 is a schematic diagram illustrating electrostatic energy being introduced into a feed point through a suspended antenna, according to an exemplary embodiment.

Fig. 10 is a block diagram illustrating a terminal device structure according to an example embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The disclosed embodiment provides an antenna circuit, as shown in fig. 1, the antenna circuit includes:

a suspension antenna;

the antenna interface 1 is connected with a feed point 2 on the suspension antenna and used for outputting an antenna signal;

the electrostatic protection component 3 is connected with the feeding point 2 and the antenna interface 1 at one end, and connected with a ground wire at the other end, and is used for performing electrostatic protection on an antenna path formed by connecting the antenna interface 1 and the feeding point 2;

a first inductance component 4, connected in series in a connection line between the electrostatic protection component 3 and the feeding point 2, for blocking the antenna signal from being transmitted to the electrostatic protection component 3.

In the embodiment of the disclosure, the antenna circuit is used for receiving and transmitting antenna signals in the suspension antenna, can suppress static electricity and radiation stray, and can improve the receiving and transmitting performance of the suspension antenna.

The antenna circuit can be applied to terminal equipment, and the terminal equipment comprises a mobile terminal and a wearable device. The mobile terminal comprises a smart phone or a tablet computer; the wearable device may include a smart watch or a smart bracelet, and embodiments of the present disclosure are not limited.

In the embodiment of the disclosure, the suspension antenna may be an antenna formed by pasting a thin metal conductor to a grounded dielectric substrate, and the suspension antenna is separated from a main board of the terminal device, so that the signal strength can be improved.

The antenna interface may be a chip interface of a radio frequency chip of the terminal device. The antenna interface can output antenna signals, namely the antenna signals can be output to the suspension antenna through the feed point so as to excite the suspension antenna to radiate wireless signals outwards; and the suspension antenna can also receive an electric signal obtained by converting the electromagnetic signal into the suspension antenna so as to realize that the suspension antenna can receive and transmit a wireless signal. Of course, the antenna interface may also output a control signal to the blocking tuning component in the antenna circuit, so that the floating antenna can receive and transmit wireless signals of different frequency bands.

In the embodiment of the disclosure, when the suspension antenna is impacted by the reverse transient high energy, the electrostatic protection component can change the high impedance at the two ends into the low impedance, so as to absorb the surge power, and further clamp the voltages at the two ends at a predetermined value, thereby protecting the antenna path between the antenna interface and the feed point and the components on the antenna path from being damaged. Here, the component includes a chip and a component, for example, the chip includes an antenna switch chip, and the component includes a resistor, an inductor, a capacitor, and the like.

In some embodiments, the electrostatic protection component comprises a transient diode. The transient diode can quickly respond to transient power, can change high impedance between two poles into low impedance at the speed of 10 minus 12 th power second, and can absorb large current so as to absorb surge power of thousands of watts and clamp the voltage between two poles at a preset value, thereby protecting an antenna path between an antenna interface and a feed point and components on the antenna path from being damaged by various surge pulses.

It should be noted that, when the voltage across the electrostatic protection component is clamped at a predetermined value, the voltages to ground of the feeding point connected to the electrostatic protection component and the antenna interface are also the predetermined value, and when the predetermined value is less than or equal to the operating voltage of the component on the antenna path between the antenna interface and the feeding point, the electrostatic protection component can protect the component on the antenna path; when the predetermined value is greater than the operating voltage of the component on the antenna path between the antenna interface and the feed point, the electrostatic protection component cannot protect the component on the antenna path. Therefore, when the electrostatic protection module is to be selected, the operating voltage of the component needs to be considered.

In the embodiment of the disclosure, the first inductance component can block the antenna signal of the feed point from being transmitted to the electrostatic protection component, so that the radiation stray problem caused by the electrostatic protection component to the antenna circuit can be reduced.

It should be noted that, when the suspension antenna transmits an antenna signal through the feeding point, the voltage at the feeding point changes along with the change of the antenna signal. When the electrostatic protection component clamps the voltage to a predetermined value, if there is no first inductance component, when the voltage of the antenna signal at the feeding point is greater than the predetermined value, because the same point has the same potential, the voltage of the antenna signal is also clamped to the predetermined value, and at this time, a radiation stray problem will be generated in the circuit, and the antenna signal will be affected. When the first inductance component is connected in series in a connecting line between the static protection component and the feed point, the first inductance component is equivalent to open circuit for an antenna signal, and is equivalent to short circuit for the surge impact of ESD, so that when the suspension antenna is impacted by reverse transient high energy, the static protection component can perform static protection on an antenna path formed by connecting the antenna interface and the feed point; when the floating antenna receives and transmits the antenna signal, the first inductance component equivalently disconnects the electrostatic protection component from the feeding point, so that the antenna signal is blocked from being transmitted to the electrostatic protection component.

For example, the first inductance component may be formed by connecting a plurality of inductors in series, and may also be formed by one inductor, and the embodiments of the present disclosure are not limited.

The antenna circuit of this disclosed embodiment, through establish ties first inductance component in the interconnecting link between electrostatic protection subassembly and feed point, can obstruct antenna signal transmission to electrostatic protection subassembly to the operating voltage that can solve the TVS of chooseing for use is less than the spurious problem of radiation that standing wave voltage leads to, and then can select TVS more nimble, can solve the spurious problem of radiation when realizing electrostatic protection.

In some embodiments, as shown in fig. 1, the feeding point 2, the first inductive component 4 and the electrostatic protection component 3 form an electrostatic path;

the electrostatic path is used for transmitting the electrostatic energy introduced to the feeding point to the electrostatic protection component.

In the embodiment of the disclosure, when the surge impact of the ESD is transmitted to the feeding point through the suspension antenna, the first inductance component and the electrostatic protection component form a low impedance path relative to the antenna path because the first inductance component is equivalent to a short circuit to the electrostatic energy. Therefore, the electrostatic energy is absorbed by the electrostatic protection component through the first inductance component, and does not flow into an antenna path formed by connecting the feed point and the antenna interface, so that the antenna path and components on the antenna path can be protected.

In some embodiments, as shown in fig. 2, the antenna circuit further comprises a position detection component 5 connected to the first inductive component 4;

the first inductance component 4 is connected between the electrostatic protection component 3 and the feeding point 2;

wherein the position detection component 5 is configured to detect position information of a target object, such that the transmitting power of the levitation antenna can be adjusted based on the position information.

In the embodiment of the disclosure, the position detection component can detect the position of the target object relative to the floating antenna by detecting the capacitance change at the feed point, so as to adjust the transmitting power of the floating antenna, thereby reducing the radiation damage to the target object when the target object approaches the terminal device. For example, when a person approaches a terminal device having the antenna circuit, the capacitance at the feed point decreases, and the transmission power of the floating antenna decreases. Thus, radiation to the human body can be reduced.

Illustratively, the position detection assembly includes a Specific Absorption Rate (SAR) sensor. The SAR sensor is connected with the radio frequency chip and detects the change of the capacitance value at the feed point through a sent square wave signal; the radio frequency chip adjusts the transmitting power of the suspension antenna through the change of the feedback capacitance value.

In the embodiment of the disclosure, when the circuit of the levitation antenna includes the position detection component, the first inductance component is connected between the electrostatic protection component and the feeding point, and the position detection component is connected with the first inductance component and connected in parallel with the electrostatic protection component, so that the first inductance component can also protect the position detection component.

It should be noted that the position detecting assembly cannot directly sense ground during operation, and therefore, here, the first inductance assembly is connected between the electrostatic protection assembly and the feeding point, the first inductance assembly is connected to ground via the electrostatic protection assembly, and the position detecting assembly is connected in parallel with the electrostatic protection assembly. Thus, better operation of the position detection assembly can be achieved.

In some embodiments, as shown in fig. 1, 2 and 3, the antenna circuit does not include the position detection assembly 5;

alternatively, the first and second liquid crystal display panels may be,

the electrostatic protection component 3 is connected between the first inductive component 4 and the feeding point 2.

In the embodiment of the disclosure, when the antenna circuit does not include the position detection component, whether the position detection component has an inductance to the ground or not does not need to be considered, the first inductance component may be connected between the electrostatic protection component and the feed point, and the first inductance component is connected with the ground through the electrostatic protection component; the first inductance assembly can also be connected between the electrostatic protection assembly and the ground wire, one end of the first inductance assembly is directly connected with the ground wire, and the other end of the first inductance assembly is connected with the feed point through the electrostatic protection assembly. Therefore, the connection mode of the first inductance assembly can be more flexible.

In some embodiments, as shown in fig. 4a and 4b, the antenna circuit further comprises a second inductive component 6;

the second inductance assembly 6 is connected between the electrostatic protection assembly 3 and the position detection assembly 5.

In the embodiment of the present disclosure, when the antenna circuit includes the position detection component, and the position detection component is connected to the first inductance component and connected in parallel to the electrostatic protection component, the embodiment of the present disclosure further sets the second inductance component between the electrostatic protection component and the position detection component, so that the second inductance component can further protect the position detection component.

It should be noted that the second inductance component may be formed by connecting a plurality of inductors in series, and may also be formed by one inductor. Here, the inductance value of the second inductance component and the inductance value of the first inductance component may be set according to actual needs, and the embodiment of the disclosure is not limited here.

In some embodiments, as shown in fig. 5, the antenna circuit further comprises a capacitive component 7:

the capacitor component 7 is connected in series in the antenna path, and one end of the capacitor component is connected with the first inductor component 4 and the feeding point 2, and the other end of the capacitor component is connected with the antenna interface 1.

In the embodiment of the present disclosure, the capacitor assembly can improve impedance matching with the suspension antenna.

In some embodiments, as shown in fig. 6, the antenna circuit further comprises an impedance tuning component 8;

the impedance tuning component 8 is connected between the antenna interface 1 and the capacitor component 7, and is configured to tune the antenna signal to switch the suspension antenna to receive and transmit wireless signals of different frequency bands.

In the embodiment of the present disclosure, the impedance tuning component may be an antenna switch chip, and different impedances may be connected to the suspension antenna by switching the antenna switch, so that the suspension antenna may have more transceiving frequency bands to transceive wireless signals of different frequency bands.

In the embodiment of the present disclosure, the impedance tuning module has a switch control Interface for receiving a control signal sent by the rf chip, where the switch control Interface includes, but is not limited to, a Mobile Industry Processor Interface (MIPI).

In some embodiments, the first inductive component comprises an inductance between 100 nanohenries and 150 nanohenries.

In the embodiment of the present disclosure, the larger the inductance value of the first inductance component is, the better the protection effect on the antenna path is when the surge of the ESD strikes, but the larger the inductance value is, the larger the volume occupied by the terminal device is.

In the embodiment of the present disclosure, the inductor is between 100 nanohenries and 150 nanohenries, so that the antenna path can be protected, the problem of radiation stray can be solved, and the space occupied by the terminal device can be reduced.

For a better understanding of one or more of the embodiments described above, examples of embodiments of the disclosure are as follows:

fig. 7 is a schematic diagram of a related antenna circuit according to an exemplary embodiment, as shown in fig. 7, the circuit includes capacitors a7715, a7724 to a7726, a7735, a7739, a7741 to a7743, inductors a7738, a7740, a7744, and a7746, resistors a7734, a7736, a7737, and a7745, a chip a7702, and a 10-pin impedance tuning component S7700, feeding points J7719 and J7701, TVS transient diodes CR7702 and CR7702, a power interface VREG-L15B-1P8-ANT, and a clock interface [2,78] sm f ferf0 _clk _antand a data interface [2,78] sm f ferf0 _dataant of the MIMP interface. When the electrostatic energy is transmitted from the suspension antenna to the feeding point J7719, the electrostatic energy continues to flow to the next stage, and in the absence of the TVS transient diode CR7702, the capacitor component a7725 and the impedance tuning component S7700 of the next stage are damaged. Therefore, the related art solution is to connect a TVS transient diode CR7702 at the feeding point J7719, and the TVS can suppress static electricity to protect the capacitor component a7725 and the impedance tuning component S7700 at the subsequent stage. However, there is a range of standing wave voltages at the feed point J7719, typically between 20-40V. When the operating voltage (the predetermined value of the voltage clamp) of the selected TVS transient diode CR7702 is greater than 40V, the capacitor component a7725 and the impedance tuning component S7700 cannot be protected; when the operating voltage of the selected TVS transient diode CR7702 is less than 40V, there is a radiation stray problem. Therefore, many antenna circuits have no proper TVS selection, resulting in electrostatic energy damaging the capacitive component a7725 and the impedance tuning component S7700.

Based on this, the embodiments of the present disclosure provide connecting a first inductance component in an antenna circuit. As shown in fig. 8, the circuit includes capacitors a111 to a113, EM101, EM102, inductors a124, a132, a144, a148, resistor a104, 10-pin impedance tuning element S105, feed point J111, TVS transient diode CR101, power interface VREG-L15B-1P8, position detection element interface [78] sar \\ senso 1 \s, and clock interface SM _ RFFE0_ CLK [2,78] and DATA interface SM _ RFFE0_ DATA [2,78] of MIMP interface, wherein the inductance value of the first inductor element a148 is between 100 nanohenries and 150 nanohenries, the error value is ± 5%, packaged as 0201 patch; the capacitance value of the capacitor component A113 is 33 picofarads, the withstand voltage value is 50V, the error value is +/-5%, the capacitor component is packaged into a 0201 patch, and the model of the TVS transient diode CR101 is PESD3V3W1BESFYL. The first inductance component a148 is connected in series at the position of the feeding point J111 and the capacitance component a113 of the suspension antenna, and the TVS transient diode CR101 is connected in series behind the first inductance component a148 and then connected to the ground. Thus, the first inductance component a148 is equivalent to open circuit for the antenna signal, and surge impact for ESD is equivalent to short circuit, and when the suspension antenna is impacted by reverse transient high energy, the TVS can perform electrostatic protection for the antenna path composed of the capacitance component a113 and the impedance tuning component S105; when the suspension antenna receives and transmits the antenna signal, the first inductance component a148 is equivalent to disconnecting the TVS transient diode CR101 from the feeding point J111, so that the antenna signal is blocked from being transmitted to the TVS transient diode CR101, and the problem of radiation stray caused by the TVS working voltage being less than 40V can be solved.

As shown in fig. 9, when the energy of ESD is generated, the first inductance component a148 and the TVS transient diode CR101 form a low impedance path, the solid curve path is the ESD path, and the dashed curve path is the antenna signal path, and because the first inductance component a148 completely isolates the high frequency energy of the antenna signal, the embodiment can solve both the ESD problem and the RSE problem.

As shown in fig. 9, the position detection component is connected to the first inductance component a148 and connected in parallel with the TVS transient diode CR101, and the position detection component can detect a capacitance value at J111 through a square wave signal emitted by [78] sar _senso1 _, that is, when a human body approaches, a capacitance change is detected, and the transmission power of the antenna is reduced by feeding back to the radio frequency chip, so that, on the one hand, radiation to the human body is reduced; on the other hand, the position detection unit can be effectively protected.

The embodiment of the present disclosure further provides a terminal device, which includes:

a camera assembly;

In the embodiment of the present disclosure, the antenna circuit is disposed on the opposite side of the camera assembly of the terminal device.

The terminal equipment of this disclosed embodiment is provided with antenna circuit, through establishing ties the first inductance subassembly in the interconnecting link between electrostatic protection subassembly and feed point, can obstruct antenna signal transmission to electrostatic protection subassembly, can solve the spurious problem of radiation when realizing electrostatic protection, can bring better experience for the target object that uses terminal equipment.

Fig. 10 is a block diagram illustrating a structure of a terminal device according to an exemplary embodiment. For example, the terminal device may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, and the like.

Referring to fig. 10, terminal device 800 may include one or more of the following components: processing component 802, memory 804, power component 806, multimedia component 808, audio component 810, input/output (I/O) interface 812, sensor component 814, and communication component 816.

The processing component 802 generally controls overall operation of the terminal device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operation at the device 800. Examples of such data include instructions for any application or method operating on terminal device 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Power components 806 provide power to the various components of terminal device 800. Power components 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for terminal device 800.

The multimedia component 808 comprises a screen providing an output interface between the terminal device 800 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the device 800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive an external audio signal when the terminal device 800 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

Sensor component 814 includes one or more sensors for providing various aspects of state assessment for terminal device 800. For example, sensor assembly 814 can detect the open/closed state of device 800, the relative positioning of components, such as a display and keypad of terminal device 800, sensor assembly 814 can also detect a change in the position of terminal device 800 or a component of terminal device 800, the presence or absence of user contact with terminal device 800, orientation or acceleration/deceleration of terminal device 800, and a change in the temperature of terminal device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

Communication component 816 is configured to facilitate communications between terminal device 800 and other devices in a wired or wireless manner. The terminal device 800 may access a wireless network based on a communication standard, such as WiFi,2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the terminal device 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic components.

In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 804 comprising instructions, executable by the processor 820 of the terminal device 800 is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An antenna circuit, comprising:

a suspension antenna;

2. The antenna circuit of claim 1, wherein the feed point, the first inductive component, and the electrostatic protection component form an electrostatic path;

3. The antenna circuit according to claim 1 or 2, characterized in that the antenna circuit further comprises a position detection component connected to the first inductive component;

wherein the position detection component is configured to detect position information of a target object such that a transmit power of the levitation antenna can be adjusted based on the position information.

4. The antenna circuit of claim 3, further comprising a second inductive component;

5. The antenna circuit according to claim 1 or 2, characterized in that the antenna circuit does not comprise a position detection component;

alternatively, the first and second electrodes may be,

6. The antenna circuit according to claim 1 or 2, characterized in that the antenna circuit further comprises a capacitive component:

7. The antenna circuit of claim 6, further comprising an impedance tuning component;

the impedance tuning component is connected between the antenna interface and the capacitor component and used for tuning the antenna signal so as to switch the suspension antenna to receive and transmit wireless signals of different frequency bands.

8. The antenna circuit of claim 1 or 2, wherein the first inductive component comprises an inductance, the inductance being between 100 nanohenries and 150 nanohenries.

9. The antenna circuit according to claim 1 or 2, wherein the electrostatic protection component comprises a transient diode.

10. A terminal device, characterized in that the terminal device comprises:

a camera assembly;

an antenna circuit as claimed in any one of claims 1 to 9; and the suspension antenna in the antenna circuit and the camera assembly are respectively positioned at two opposite ends of the terminal equipment.