CN115425390A

CN115425390A - Terminal antenna and electronic equipment

Info

Publication number: CN115425390A
Application number: CN202211080212.6A
Authority: CN
Inventors: 李元鹏; 周大为
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2022-09-05
Filing date: 2022-09-05
Publication date: 2022-12-02
Anticipated expiration: 2042-09-05
Also published as: CN115425390B

Abstract

The embodiment of the application provides a terminal antenna and an electronic device, which are applied to the field of antennas and can improve the efficiency of the terminal antenna in a folding screen mobile phone, wherein the folding screen mobile phone comprises a rotating shaft for opening or closing a folding screen. The terminal antenna includes: a first antenna and a second antenna. The first antenna is arranged on the middle frame of the mobile phone on one side of the rotating shaft. The second antenna is arranged on the middle frame of the mobile phone at the other side of the rotating shaft. The first antenna is connected with the feed source through a first transmission line, and the second antenna is connected with the feed source through a second transmission line. When the feed source feeds power to the first antenna and the second antenna and the folding screen mobile phone is closed, the first antenna and the second antenna are at least partially opposite, and currents of the opposite parts are in the same direction.

Description

Terminal antenna and electronic equipment

Technical Field

The embodiment of the application relates to the field of antennas, in particular to a terminal antenna and electronic equipment.

Background

A folding screen mobile phone is a popular mobile phone form, and a screen of the folding screen mobile phone can be folded inwards, so that the mobile phone can be converted between a larger size and a smaller size. The state of the folding screen mobile phone when folded can be generally referred to as a closed state, and the state of the folding screen mobile phone when unfolded is referred to as an open state.

The terminal antennas of the folding screen mobile phone are usually arranged on the two side frames. When the folding screen mobile phone is in a closed state, the terminal antennas on the two side frames are opposite, and a folding slot mode of the terminal antennas may be excited. Because the mobile phone screen is made of a loss material, energy in the folding gap mode can be absorbed by the mobile phone screen, and the efficiency of the terminal antenna is seriously reduced.

Therefore, how to improve the efficiency of the terminal antenna in the folding screen mobile phone becomes an urgent problem to be solved.

Disclosure of Invention

The embodiment of the application provides a terminal antenna and electronic equipment, and the efficiency of the terminal antenna in a folding screen mobile phone can be improved.

In order to achieve the above object, the embodiments of the present application adopt the following technical solutions.

In a first aspect, a terminal antenna is provided, which is applied to a folding screen mobile phone, where the folding screen mobile phone includes a rotating shaft for opening or closing a folding screen. The terminal antenna includes: a first antenna and a second antenna. The first antenna is arranged on the middle frame of the mobile phone on one side of the rotating shaft. The second antenna is arranged on the middle frame of the mobile phone at the other side of the rotating shaft. The first antenna is connected with the feed source through a first transmission line, and the second antenna is connected with the feed source through a second transmission line. When the feed feeds power to the first antenna and the second antenna and the folding screen mobile phone is closed, the first antenna and the second antenna are at least partially opposite, and currents of the opposite parts are in the same direction.

Based on the scheme, when the feed source feeds power to the first antenna and the second antenna and the folding screen mobile phone is closed, the first antenna and the second antenna are at least partially opposite, and currents of the opposite parts are in the same direction. Therefore, electric fields excited by the first antenna and the second antenna in the folding screen are mutually offset, the loss of the electric fields on the folding screen is reduced, and the efficiency of the terminal antenna is improved.

In one possible design, the phase difference between the first transmission line and the second transmission line is no more than a quarter wavelength. The wavelength refers to a wavelength corresponding to an electromagnetic wave of the terminal antenna in an operating frequency band. Based on the scheme, the phase difference between the current fed into the first antenna and the current fed into the second antenna can be reduced, so that the currents of opposite parts of the first antenna and the second antenna are in the same direction.

In one possible design, the terminal antenna further includes a first phase shifter and a second phase shifter. The first phase shifter is arranged at the joint of the first transmission line and the first antenna, and the second phase shifter is arranged at the joint of the second transmission line and the second antenna. The first phase shifter and the second phase shifter are configured to: when the folding screen mobile phone is closed, the phase of the current fed into the first antenna and the phase of the current fed into the second antenna are adjusted to be equal. When the folding screen mobile phone is opened, the difference between the phase of the current fed into the first antenna and the phase of the current fed into the second antenna is adjusted to 180 degrees. Based on the scheme, the electric field excited by the first antenna on the floor and the electric field excited by the second antenna on the floor are in the same direction. The electric fields in the same direction are mutually superposed, so that the efficiency of the terminal antenna when the folding screen mobile phone is in an open state can be further improved.

In one possible design, a first sensor is included in the folding screen phone and is used for detecting the state of the folding screen phone. The states of the folding screen mobile phone include closed and open. The first phase shifter and the second phase shifter are configured to: and acquiring the state of the folding screen mobile phone through the first sensor. When the folding screen mobile phone is closed, the phase of the current fed into the first antenna and the phase of the current fed into the second antenna are adjusted to be equal. When the folding screen mobile phone is opened, the difference between the phase of the current fed into the first antenna and the phase of the current fed into the second antenna is adjusted to 180 degrees. Based on the scheme, the existing sensor in the folding screen mobile phone can be utilized to conveniently acquire the state information of the folding screen mobile phone.

In one possible design, the first antenna includes a first radiator and a first parasitic stub. The coupling end of the first radiator and the first parasitic branch is connected to the feed source through a first transmission line. The second antenna also comprises a second radiator and a second parasitic branch, and the coupling ends of the second radiator and the second parasitic branch are connected to the feed source through a second transmission line. When the feed source feeds power to the first antenna and the second antenna and the folding screen mobile phone is closed, the first radiating body is opposite to the second radiating body, the first parasitic branch is opposite to the second parasitic branch, and the current directions of all opposite parts are the same. Based on the scheme, the electric fields excited by the first antenna and the second antenna in the folding screen are mutually offset, so that the loss of the electric fields on the folding screen is reduced, and the efficiency of the terminal antenna is improved.

In one possible design, the terminal antenna further includes a first matching device, a second matching device, a third matching device, and a fourth matching device. The first matching device is arranged at the joint of the first transmission line and the first antenna. The second matching device is arranged at one end of the first antenna. The third matching device is arranged at the joint of the second transmission line and the second antenna. The fourth matching device is arranged at one end of the second antenna. The first matching device and the second matching device are used for adjusting impedance matching and port matching of the first antenna. The third matching device and the fourth matching device are used for adjusting impedance matching and port matching of the second antenna. Based on the scheme, the impedance matching, the port matching and the like of each antenna can be conveniently adjusted through each matching device.

In one possible design, the first matched device is at least one of: capacitor, inductor, switch. The second matching device is at least one of: capacitor, inductor, switch. The third matching device is at least one of: capacitor, inductor, switch. The fourth matching device is at least one of: capacitor, inductor, switch. Based on the scheme, the impedance matching, the port matching and the like of each antenna can be conveniently adjusted through elements such as capacitors, inductors, switches and the like

In one possible design, the middle frame of the mobile phone is made of metal. A gap is arranged between the first antenna and the middle frame of the mobile phone. A gap is arranged between the second antenna and the middle frame of the mobile phone. Based on the scheme, normal work of the mobile phone middle frame made of metal to each antenna can be avoided, and the efficiency of the terminal antenna is improved.

In one possible design, the feed source is a radio frequency signal processing module in a folding screen mobile phone. Based on this scheme, can realize the feed to first antenna and second antenna conveniently.

In a second aspect, an electronic device is provided, wherein the electronic device includes the terminal antenna introduced in any one of the first aspect.

It should be understood that, technical features of the technical solution provided by the second aspect may all correspond to the terminal antenna provided by the first aspect and possible designs thereof, so that similar beneficial effects can be achieved, and further description thereof is omitted here.

Drawings

FIG. 1 is a schematic view of a folding screen phone in an open position;

FIG. 2 is a schematic view of a folding screen handset in a closed position;

fig. 3 is a schematic diagram of current distribution and electric field distribution on a panel when a folding screen mobile phone is in a closed state;

fig. 4 is a schematic structural diagram of an electronic device 400 according to an embodiment of the present disclosure;

fig. 5 is a schematic view of a folding screen mobile phone with a terminal antenna in an open state according to an embodiment of the present application;

fig. 6 is a schematic current diagram of a folding-screen mobile phone with a terminal antenna in a closed state according to an embodiment of the present application;

fig. 7 is a schematic diagram of current and electric field in a folding screen mobile phone according to an embodiment of the present disclosure;

fig. 8 is a schematic diagram illustrating an efficiency curve of a terminal antenna according to an embodiment of the present application;

fig. 9 is a schematic diagram illustrating an efficiency curve of another terminal antenna according to an embodiment of the present application;

fig. 10 is a schematic diagram of another terminal antenna provided in the embodiment of the present application;

fig. 11 is a schematic diagram of another terminal antenna provided in the embodiment of the present application;

fig. 12 is a schematic view of current distribution on a folding screen mobile phone according to an embodiment of the present application;

fig. 13 is a schematic diagram of another terminal antenna according to an embodiment of the present application.

Detailed Description

The terms "first", "second", and "third" and the like in the embodiments of the present application are used for distinguishing different objects, and are not used for defining a specific order. Moreover, the words "exemplary" or "such as" are used herein to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "such as" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

To facilitate understanding of the embodiments of the present application, the background of the application of the present application is described below.

Please refer to fig. 1, which is a schematic diagram of a folding screen mobile phone in an open state. As shown in fig. 1, the terminal antenna in the folding screen mobile phone includes an antenna a and an antenna b. The antenna a and the antenna b are respectively arranged on two sides of the folding screen mobile phone. The antenna a is an active antenna, and receives the feed of the rf signal processing module 102 through the transmission line 101. The antenna b is a passive antenna. The position of the antenna a and the position of the antenna b are symmetrical about the rotating shaft 103 of the folding screen mobile phone.

It can be seen that when the folding screen mobile phone is in the open state, the current output by the radio frequency signal processing module 102 flows into the radiator of the antenna a along the transmission line 101, and flows from the position where the current flows into the radiator to the two ends of the radiator. No current flows through the radiator of antenna b.

When the folding screen mobile phone is in a closed state, the current on the radiator of the antenna a is coupled to the antenna b. Please refer to fig. 2, which is a schematic diagram of a foldable screen mobile phone in a closed state. As shown in fig. 2, after the rf signal processing module 102 feeds current to the radiator of the antenna a through the transmission line 101, the current is coupled to the radiator of the antenna b. It will be appreciated that the coupling current in the radiator of antenna b is opposite to the current in the radiator of antenna a.

That is, when the folding screen mobile phone is in a closed state, the antenna a and the antenna b are excited to be in a folding slot mode. In the folded slot mode, the current distribution on the floor of the folded screen handset is as shown in fig. 3. Fig. 3 is a schematic diagram of current distribution and electric field distribution on a time plate when a folding screen mobile phone is in a closed state. The current vertically points to the direction of the rotating shaft 103 along the floor plane, and the electric field passes through the mobile phone screen from the side where the antenna a is located and vertically points to the side where the antenna b is located.

The mobile phone screen is a high-loss material for electromagnetic waves. Generally, the conductivity of the mobile phone screen is about e ³ Omega/m and the electrical conductivity of the metal is about e ⁶ Omega/m. Therefore, the electric field passing through the screen of the mobile phone generates large loss. Making the efficiency of the terminal antenna low.

In order to solve the problem, the embodiment of the application provides a terminal antenna and an electronic device, which can improve the efficiency of the terminal antenna in a folding screen mobile phone.

The terminal antenna provided by the embodiment of the application can be applied to electronic equipment. The electronic device may refer to a device provided with a terminal antenna, such as a mobile phone, a tablet computer, a wearable device (e.g., a smart watch), a vehicle-mounted device, a Laptop computer (Laptop), a desktop computer, and the like. Exemplary embodiments of the terminal device include, but are not limited to, piggy-backing

Or other operating system.

As an example, please refer to fig. 4, which is a schematic structural diagram of an electronic device 400 according to an embodiment of the present disclosure.

As shown in fig. 4, the electronic device 400 may include a processor 401, a communication module 402, a display 403, and the like.

Among other things, processor 401 may include one or more processing units, such as: the processor 401 may include an Application Processor (AP), a modem processor, a Graphics Processing Unit (GPU), an Image Signal Processor (ISP), a controller, a memory, a video stream codec, a Digital Signal Processor (DSP), a baseband processor, and/or a neural-Network Processing Unit (NPU), etc. The different processing units may be separate devices or may be integrated into one or more processors 401.

The controller may be a neural center and a command center of the electronic device 400. The controller can generate an operation control signal according to the instruction operation code and the timing signal to complete the control of instruction fetching and instruction execution.

A memory may also be provided in processor 401 for storing instructions and data. In some embodiments, the memory in processor 401 is a cache memory. The memory may hold instructions or data that have just been used or recycled by processor 401. If the processor 401 needs to use the instruction or data again, it can be called directly from the memory. Avoiding repeated accesses reduces the latency of the processor 401, thereby increasing the efficiency of the system.

In some embodiments, processor 401 may include one or more interfaces. The interface may include an integrated circuit (I2C) interface, an integrated circuit built-in audio (I2S) interface, a Pulse Code Modulation (PCM) interface, a universal asynchronous receiver/transmitter (UART) interface, a mobile industry processor 401 interface (mobile industry processor interface, MIPI), a general-purpose-input/output (GPIO) interface, a Subscriber Identity Module (SIM) interface, and/or a Universal Serial Bus (USB) interface 411, and the like.

The electronic device 400 implements display functions via the GPU, the display screen 403, and the application processor 401. The GPU is a microprocessor for image processing, and is connected to a display screen 403 and an application processor 401. The GPU is used to perform mathematical and geometric calculations for graphics rendering. Processor 401 may include one or more GPUs that execute program instructions to generate or change display information.

The display screen 403 is used to display images, video streams, etc.

The communication module 402 may include an antenna x, an antenna y, a mobile communication module 402A, and/or a wireless communication module 402B. Take the case that the communication module 402 includes the antenna x, the antenna y, the mobile communication module 402A and the wireless communication module 402B.

The wireless communication function of the electronic device 400 may be implemented by the antenna x, the antenna y, the mobile communication module 402A, the wireless communication module 402B, the modem processor, the baseband processor, and the like.

Antennas x and y are used to transmit and receive electromagnetic wave signals. Each antenna in electronic device 400 may be used to cover a single or multiple communication bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example: antenna x may be multiplexed as a diversity antenna for a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module 402A may provide a solution including wireless communication of 2G/3G/4G/5G, etc. applied on the electronic device 400. The mobile communication module 402A may include at least one filter, a switch, a power amplifier, a Low Noise Amplifier (LNA), and the like. The mobile communication module 402A may receive the electromagnetic wave from the antenna x, filter, amplify, etc. the received electromagnetic wave, and transmit the filtered electromagnetic wave to the modem processor for demodulation. The mobile communication module 402A may also amplify the signal modulated by the modem processor, and convert the signal into electromagnetic waves via the antenna x for radiation. In some embodiments, at least some of the functional modules of the mobile communication module 402A may be disposed in the processor 401. In some embodiments, at least some of the functional modules of the mobile communication module 402A may be provided in the same device as at least some of the modules of the processor 401.

The modem processor may include a modulator and a demodulator. The modulator is used for modulating a low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used for demodulating the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then passes the demodulated low frequency baseband signal to a baseband processor for processing. The low frequency baseband signal is processed by the baseband processor and then transferred to the application processor. The application processor outputs sound signals through an audio device (not limited to the speaker 406A, the receiver 406B, etc.) or displays images or video streams through the display screen 403. In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modem processor may be separate from the processor 401 and may be disposed in the same device as the mobile communication module 402A or other functional modules.

The wireless communication module 402B may provide solutions for wireless communication applied to the electronic device 400, including Wireless Local Area Networks (WLANs) (e.g., wireless fidelity (Wi-Fi) networks), bluetooth (bluetooth, BT), global Navigation Satellite System (GNSS), frequency Modulation (FM), near Field Communication (NFC), infrared (IR), and the like. The wireless communication module 402B may be one or more devices that integrate at least one communication processing module. The wireless communication module 402B receives electromagnetic waves via the antenna y, performs frequency modulation and filtering processing on electromagnetic wave signals, and transmits the processed signals to the processor 401. The wireless communication module 402B may also receive a signal to be transmitted from the processor 401, frequency-modulate and amplify the signal, and convert the signal into electromagnetic waves via the antenna y to radiate the electromagnetic waves.

In some embodiments, antenna x of electronic device 400 is coupled to mobile communication module 402A and antenna y is coupled to wireless communication module 402B, such that electronic device 400 may communicate with networks and other devices through wireless communication techniques. The wireless communication technology may include global system for mobile communications (GSM), general Packet Radio Service (GPRS), code division multiple access (code division multiple access, CDMA), wideband Code Division Multiple Access (WCDMA), time-division code division multiple access (time-division code division multiple access, TD-SCDMA), long Term Evolution (LTE), BT, GNSS, WLAN, NFC, FM, and/or IR technologies, etc. The GNSS may include a Global Positioning System (GPS), a global navigation satellite system (GLONASS), a beidou navigation satellite system (BDS), a quasi-zenith satellite system (QZSS), and/or a Satellite Based Augmentation System (SBAS).

As shown in fig. 4, in some implementations, the electronic device 400 may further include an external memory interface 140, an internal memory 404, a Universal Serial Bus (USB) interface 411, a charging management module 412, a power management module 413, a battery 414, an audio module 406, a speaker 406A, a receiver 406B, a microphone 406C, a headset interface 406D, a sensor module 405, keys 409, a motor, an indicator 408, a camera 407, a Subscriber Identification Module (SIM) card interface, and the like.

The charging management module 412 is configured to receive charging input from a charger. The charger can be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 412 may receive charging input from a wired charger through the USB interface 411. In some wireless charging embodiments, the charging management module 412 may receive the wireless charging input through a wireless charging coil of the electronic device 400. While the charging management module 412 charges the battery 414, the electronic device 400 may be powered by the power management module 413.

The power management module 413 is used to connect the battery 414, the charging management module 412 and the processor 401. The power management module 413 receives input from the battery 414 and/or the charging management module 412 and provides power to the processor 401, the internal memory 404, the external memory, the display 403, the camera 407, the wireless communication module 402B, and the like. The power management module 413 may also be configured to monitor parameters such as the capacity of the battery 414, the number of cycles of the battery 414, and the state of health (leakage, impedance) of the battery 414. In other embodiments, the power management module 413 may be disposed in the processor 401. In other embodiments, the power management module 413 and the charging management module 412 may be disposed in the same device.

The external memory interface 140 may be used to connect an external memory card, such as a Micro SD card, to extend the storage capability of the electronic device 400. The external memory card communicates with the processor 401 through the external memory interface 140 to implement a data storage function. For example, files such as music, video streams, etc. are saved in the external memory card.

The internal memory 404 may be used to store computer-executable program code, which includes instructions. The processor 401 executes various functional applications of the electronic device 400 and data processing by executing instructions stored in the internal memory 404.

The internal memory 404 may further store one or more computer programs corresponding to the data transmission method provided in the embodiment of the present application.

The electronic device 400 may implement audio functions via the audio module 406, the speaker 406A, the receiver 406B, the microphone 406C, the headset interface 406D, the application processor 401, and the like. Such as music playing, recording, etc.

The keys 409 include a power-on key, a volume key, and the like. The keys 409 may be mechanical keys 409. Or may be touch keys 409. The electronic device 400 may receive key 409 inputs that generate key signal inputs relating to user settings and function controls of the electronic device 400.

Indicator 408 may be an indicator light that may be used to indicate a state of charge, a change in charge, or a message, missed call, notification, etc.

The SIM card interface is used for connecting the SIM card. The SIM card can be brought into and out of contact with the electronic device 400 by being inserted into and pulled out of the SIM card interface. The electronic device 400 may support 1 or N SIM card interfaces, N being a positive integer greater than 1. The SIM card interface can support a Nano SIM card, a Micro SIM card, a SIM card and the like. Multiple cards can be inserted into the same SIM card interface at the same time. The types of the plurality of cards can be the same or different. The SIM card interface may also be compatible with different types of SIM cards. The SIM card interface is also compatible with external memory cards. The electronic device 400 interacts with the network through the SIM card to implement functions such as communication and data communication. In some embodiments, the electronic device 400 employs esims, namely: an embedded SIM card. The eSIM card can be embedded in the electronic device 400 and cannot be separated from the electronic device 400.

The sensor module 405 in the electronic device 400 may include a touch sensor, a pressure sensor, a gyroscope sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, an ambient light sensor, a fingerprint sensor, a temperature sensor, a bone conduction sensor, and the like to implement sensing and/or acquiring functions for different signals.

It is to be understood that the illustrated structure of the present embodiment does not constitute a specific limitation to the electronic device 400. In other embodiments, electronic device 400 may include more or fewer components than illustrated, or combine certain components, or split certain components, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The following describes a terminal antenna provided in an embodiment of the present application. It should be noted that the terminal antenna provided in the embodiment of the present application is applied to a folding screen mobile phone. The folding screen mobile phone is provided with a rotating shaft, and the rotating shaft is used for opening or closing the folding screen mobile phone.

Please refer to fig. 5, which is a schematic diagram of a folding-screen mobile phone with a terminal antenna in an open state according to an embodiment of the present application. As shown in fig. 5, the terminal antenna includes a first antenna 501 and a second antenna 502. The first antenna 501 is disposed on the middle frame 504 of the mobile phone on one side of the rotation shaft 503, and the second antenna 502 is disposed on the middle frame 504 of the mobile phone on the other side of the rotation shaft 503.

The mobile phone middle frame refers to a middle frame of a folding screen mobile phone. It should be noted that, if the middle frame of the mobile phone is a metal conductor, a gap needs to be formed between the first antenna and the middle frame of the mobile phone, and the first antenna and the middle frame of the mobile phone cannot be directly connected. The second antenna has the same structure, and is not described in detail later.

The first antenna 501 is connected to a feed 507 via a first transmission line 505 and the second antenna 502 is connected to the feed 507 via a second transmission line 506. The feed source may be a radio frequency signal processing module in a folding screen mobile phone, or may be other elements capable of feeding power to the antenna, which is not specifically limited herein.

In the terminal antenna provided by the embodiment of the application, when the feed source 507 feeds the first antenna 501 and the second antenna 502 and the folding screen mobile phone is closed, at least part of the first antenna and part of the second antenna are opposite, and currents of the opposite parts are in the same direction. Illustratively, as shown in fig. 5, the first antenna and the second antenna may be identical, and the first antenna and the second antenna may be symmetrically disposed about the rotation axis. The first antenna and the second antenna are the same, that is, the size, shape, feed point position, matching element and the like of the first antenna and the second antenna are the same. In this case, the phase difference of the first transmission line and the second transmission line may be less than a quarter wavelength. Thus, please refer to fig. 6, which is a schematic current diagram of a foldable screen mobile phone with a terminal antenna in a closed state according to an embodiment of the present application. As shown in fig. 6, when the feed feeds power to the first antenna and the second antenna and the folding screen mobile phone shown in fig. 5 is closed, the first antenna and the second antenna are completely opposite, and currents of opposite portions are in the same direction.

Of course, the shapes, sizes, feed point positions and the like of the first antenna and the second antenna can be different, and when the feed source feeds power to the first antenna and the second antenna and the folding screen mobile phone is closed, at least part of the first antenna and at least part of the second antenna are opposite, and currents of the opposite parts are in the same direction.

The currents of the opposite parts of the first antenna and the second antenna are in the same direction, so that the energy loss between the first antenna and the second antenna can be effectively reduced, and the efficiency of the terminal antenna is improved. The following is a detailed description.

Please refer to fig. 7, which is a schematic diagram of current and electric field in a folding screen mobile phone according to an embodiment of the present disclosure. As shown in fig. 7, the folding screen mobile phone corresponding to the terminal antenna is in a closed state. It can be seen that the current flows from the feed to the first antenna through the first transmission line to both ends of the first antenna. Similarly, current flows from the feed source through the second transmission line to the second antenna and to both ends of the second antenna. That is, the currents of the opposing portions of the first antenna and the second antenna are co-directional.

As can be seen from fig. 7, the direction of the electric field generated by the current in the first antenna and the direction of the electric field generated by the current in the second antenna are opposite. The opposing electric fields cancel each other out and do not cause the first and second antennas to excite the folded slot mode. Therefore, electric fields excited by the first antenna and the second antenna cannot generate large loss on the screen of the mobile phone, and therefore the terminal antenna provided by the embodiment of the application can still keep high efficiency when the folding screen mobile phone is in a closed state.

Next, the terminal antenna shown in fig. 1 and the terminal antenna shown in fig. 5 (i.e., the terminal antenna provided in the embodiment of the present application) are simulated, and the above conclusion is verified through the simulation result.

Please refer to fig. 8, which is a schematic diagram illustrating an efficiency curve of a terminal antenna according to an embodiment of the present application. As shown in fig. 8, a first curve is an efficiency curve of a terminal antenna provided in the embodiment of the present application when a folding screen mobile phone is in a closed state; the second curve is a schematic diagram of an efficiency curve of the terminal antenna shown in fig. 1 when the folding screen mobile phone is in a closed state.

As can be seen from fig. 8, when the folding screen mobile phone is in the closed state, the efficiency peak of the terminal antenna provided in the embodiment of the present application is about-5.14 dB, while the efficiency peak of the terminal antenna shown in fig. 1 is only about-9.92 dB. The efficiency of the terminal antenna provided by the embodiment of the application is far higher than that of the terminal antenna shown in fig. 1.

The terminal antenna provided by the embodiment of the application can still keep higher efficiency when the folding screen mobile phone is in a closed state.

In addition, the first antenna and the second antenna in the terminal antenna provided by the application are both active antennas, that is, the feed source excites the first antenna and the second antenna to work at the same time, so that when the folding screen mobile phone is in an open state, the efficiency of the terminal antenna provided by the embodiment of the application is higher than that of the terminal antenna shown in fig. 1.

Next, the terminal antenna shown in fig. 1 and the terminal antenna shown in fig. 5 (i.e., the terminal antenna provided in the embodiment of the present application) are still simulated separately, and the above conclusion is verified through the simulation result.

Please refer to fig. 9, which is a schematic diagram illustrating an efficiency curve of another terminal antenna according to an embodiment of the present application. As shown in fig. 9, the third curve is an efficiency curve of the terminal antenna provided in the embodiment of the present application when the folding-screen mobile phone is in an open state; the fourth curve is a schematic diagram of an efficiency curve of the terminal antenna shown in fig. 1 when the folding-screen mobile phone is in an open state.

As can be seen from fig. 9, when the folding screen mobile phone is in the open state, the efficiency peak of the terminal antenna provided in the embodiment of the present application is about-5.76 dB, while the efficiency peak of the terminal antenna shown in fig. 1 is only about-7.6 dB. The efficiency of the terminal antenna provided by the embodiment of the application is far higher than that of the terminal antenna shown in fig. 1.

Therefore, the efficiency of the terminal antenna provided by the embodiment of the present application is much higher than that of the terminal antenna shown in fig. 1.

To sum up, when the feed source feeds power to the first antenna and the second antenna and the folding screen mobile phone is closed, the first antenna and the second antenna are at least partially opposite, and currents of the opposite parts are in the same direction. Therefore, electric fields excited by the first antenna and the second antenna in the folding screen are mutually offset, the loss of the electric fields on the folding screen is reduced, and the efficiency of the terminal antenna is improved.

It should be noted that the terminal antenna provided in the embodiments of the present application may operate in a mobile communication frequency band of 600-1200MHz,1400MHz-2690mhz,3300-7125MHz, and the like, and is not limited herein.

In addition, the terminal antenna provided in the embodiment of the present application may further include some other features, which are specifically described below.

In a possible design, the terminal antenna provided in the embodiment of the present application may further include a first matching device, a second matching device, a third matching device, and a fourth matching device. Please refer to fig. 10, which is a schematic diagram of another terminal antenna according to an embodiment of the present application. As shown in fig. 10, a first matching device 1001 may be disposed at a connection of the first transmission line 505 and the first antenna 501, and a second matching device 1002 may be disposed at one end of the first antenna 501. A third matching device 1003 may be disposed at a connection of the second transmission line 506 and the second antenna 502, and a fourth matching device 1004 may be disposed at one end of the second antenna 502.

The first matching device and the second matching device may be switches, capacitors, inductors, and the like, and are used to adjust impedance matching, port matching, and the like of the first antenna. Similarly, the third matching device and the fourth matching device may be switches, capacitors, inductors, and the like, and are used to adjust impedance matching, port matching, and the like of the second antenna.

In a possible design, the terminal antenna provided in the embodiments of the present application may further include a first phase shifter and a second phase shifter. Please refer to fig. 11, which is a schematic diagram of another terminal antenna according to an embodiment of the present application. As shown in fig. 11, a first phase shifter 1101 is disposed at the connection of the first transmission line 505 and the first antenna 501, and a second phase shifter 1102 is disposed at the connection of the second transmission line 506 and the second antenna 502.

For convenience of description, a current fed to the first antenna by the first transmission line will be referred to as a first current, and a current fed to the second antenna by the second transmission line will be referred to as a second current. In an embodiment of the present application, the first phase shifter is configured to adjust a phase of the first current, and the second phase shifter is configured to adjust a phase of the second current.

In one embodiment, the first phase shifter and the second phase shifter may be used to adjust the phase of the first current and the phase of the second current to be equal. In this way, the currents of the opposite parts of the first antenna and the second antenna can be in the same direction, and the efficiency of the terminal antenna is improved.

In another embodiment, the first phase shifter and the second phase shifter may both be connected to a first sensor of a folding screen handset. The first sensor is used for detecting whether the folding screen mobile phone is in a closed state or an open state. When the first sensor detects that the folding screen mobile phone is in the closed state, a first instruction can be sent to the first phase shifter and the second phase shifter. The first phase shifter and the second phase shifter may adjust a phase of the first current and a phase of the second current to be equal according to the first instruction. When the first sensor detects that the folding screen mobile phone is in the opening state, a second instruction can be sent to the first phase shifter and the second phase shifter. The first phase shifter and the second phase shifter may adjust the phase of the first current and the phase of the second current to be 180 degrees different according to the second instruction.

That is, the first phase shifter and the second phase shifter may be configured to adjust a phase of a current fed to the first antenna and a phase of a current fed to the second antenna to be equal when the foldable screen mobile phone is in a closed state. When the folding screen mobile phone is in an opening state, the phase of the current fed into the first antenna and the phase of the current fed into the second antenna are adjusted to be 180 degrees different.

Therefore, the efficiency of the terminal antenna in the closed state of the folding screen mobile phone can be improved, and the efficiency of the terminal antenna in the open state of the folding screen mobile phone can be further improved.

The above embodiments have described in detail that the phase of the first current is equal to the phase of the second current, so as to improve the efficiency of the terminal antenna, and details are not repeated here.

Next, the efficiency of the terminal antenna when the folding screen mobile phone is in the open state can be further improved by adjusting the phase of the first current and the phase of the second current to be different by 180 degrees.

When the folding screen mobile phone is in a closed state and the phase difference between the first current and the second current is 180 degrees, the current distribution in the folding screen mobile phone is as shown in fig. 12. Please refer to fig. 12, which is a schematic diagram of current distribution on a folding screen mobile phone according to an embodiment of the present application. When the first antenna works, the current direction on the floor of the folding screen mobile phone is pointed to the direction of the first antenna from the direction of the rotating shaft; when the second antenna works, the current direction on the floor of the folding screen mobile phone points to the direction of the rotating shaft from the direction of the second antenna. The two currents have the same direction and can be mutually superposed, so that the efficiency of the terminal antenna when the folding screen mobile phone is in an open state is further improved.

Therefore, when the folding screen mobile phone is in the open state, the phase difference between the phase of the current fed into the first antenna and the phase of the current fed into the second antenna is adjusted to be 180 degrees, and the efficiency of the terminal antenna when the folding screen mobile phone is in the open state can be further improved.

In addition, in the terminal antenna provided in the embodiment of the present application, the first antenna and the second antenna may be multiple types of antennas, and the positions of the first antenna and the second antenna may also be multiple types of antennas.

Illustratively, the first antenna and the second antenna may both be slot antennas. Please refer to fig. 13, which is a schematic diagram of another terminal antenna according to an embodiment of the present application. As shown in fig. 13, the first antenna 1301 is disposed on the middle frame 1304 of the mobile phone on one side of the rotation shaft 1303, and the second antenna 1302 is disposed on the middle frame 1304 of the mobile phone on the other side of the rotation shaft 1303. The first antenna 1301 may include a first radiator 1311 and a first parasitic stub 1321, and the second antenna 1302 may include a second radiator 1312 and a second parasitic stub 1322. The coupling ends of the first radiator 1311 and the first parasitic branch 1321 are connected to the feed source 1307 through a first transmission line 1305, and the coupling ends of the second radiator 1312 and the second parasitic branch 1322 are connected to the feed source 1307 through a second transmission line 1306.

When the feed 1307 feeds the first antenna 1301 and the second antenna 1302 and the folding screen mobile phone is closed, the first radiator 1311 is opposite to the second radiator 1312, the first parasitic branch 1321 is opposite to the second parasitic branch 1322, and the current directions of the opposite parts are the same.

It can be understood that the first antenna and the second antenna may also be other types of antennas, and the first antenna and the second antenna may also be located at other positions in the folding screen mobile phone, and it only needs to be satisfied that when the folding screen mobile phone is closed, at least a part of the first antenna and at least a part of the second antenna are opposite, and current directions of the opposite parts are the same, and details of the types and positions of the first antenna and the second antenna are not described herein again.

An electronic device provided in an embodiment of the present application may include the terminal antenna described in any of the above embodiments.

While the terminal antenna provided by the present application has been described with reference to the specific features and embodiments thereof, it will be apparent that various modifications and combinations of the above-described features may be made without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include such modifications and variations.

Claims

1. A terminal antenna is characterized by being applied to a folding screen mobile phone, wherein the folding screen mobile phone comprises a rotating shaft for opening or closing a folding screen; the terminal antenna includes: a first antenna and a second antenna;

the first antenna is arranged on the middle frame of the mobile phone on one side of the rotating shaft; the second antenna is arranged on the middle frame of the mobile phone on the other side of the rotating shaft;

the first antenna is connected with the feed source through a first transmission line, and the second antenna is connected with the feed source through a second transmission line;

when the feed feeds power to the first antenna and the second antenna and the folding screen mobile phone is closed, the first antenna and the second antenna are at least partially opposite, and currents of the opposite parts are in the same direction.

2. The terminal antenna according to claim 1, wherein a phase difference between the first transmission line and the second transmission line is not more than a quarter wavelength; the wavelength refers to a wavelength corresponding to an electromagnetic wave of the terminal antenna in an operating frequency band.

3. The terminal antenna of claim 1, further comprising a first phase shifter and a second phase shifter;

the first phase shifter is arranged at the joint of the first transmission line and the first antenna, and the second phase shifter is arranged at the joint of the second transmission line and the second antenna;

the first phase shifter and the second phase shifter are configured to: when the folding screen mobile phone is closed, adjusting the phase of the current fed into the first antenna to be equal to the phase of the current fed into the second antenna; when the folding screen mobile phone is opened, the difference between the phase of the current fed into the first antenna and the phase of the current fed into the second antenna is adjusted to 180 degrees.

4. A terminal antenna according to claim 3, wherein the foldable screen handset includes a first sensor, the first sensor being configured to detect a status of the foldable screen handset; the states of the folding screen mobile phone comprise closing and opening;

the first phase shifter and the second phase shifter are configured to: acquiring the state of the folding screen mobile phone through the first sensor; when the folding screen mobile phone is closed, adjusting the phase of the current fed into the first antenna to be equal to the phase of the current fed into the second antenna; when the folding screen mobile phone is opened, the difference between the phase of the current fed into the first antenna and the phase of the current fed into the second antenna is adjusted to 180 degrees.

5. The terminal antenna of claim 1, wherein the first antenna includes a first radiator and a first parasitic stub; the coupling end of the first radiator and the first parasitic branch is connected to the feed source through the first transmission line;

the second antenna also comprises a second radiator and a second parasitic branch, and the coupling ends of the second radiator and the second parasitic branch are connected to the feed source through the second transmission line;

when the feed source feeds power to the first antenna and the second antenna and the folding screen mobile phone is closed, the first radiating body is opposite to the second radiating body, the first parasitic branch is opposite to the second parasitic branch, and the current directions of all opposite parts are the same.

6. The terminal antenna of claim 1, further comprising a first matching device, a second matching device, a third matching device, and a fourth matching device;

the first matching device is arranged at the joint of the first transmission line and the first antenna; the second matching device is arranged at one end of the first antenna;

the third matching device is arranged at the joint of the second transmission line and the second antenna; the fourth matching device is arranged at one end of the second antenna;

the first matching device and the second matching device are used for adjusting impedance matching and port matching of the first antenna;

the third matching device and the fourth matching device are used for adjusting impedance matching and port matching of the second antenna.

7. The terminal antenna of claim 6, wherein the first matching device is at least one of: a capacitor, an inductor, a switch; the second matching device is at least one of: a capacitor, an inductor, a switch; the third matching device is at least one of: a capacitor, an inductor, a switch; the fourth matching device is at least one of: capacitor, inductor, switch.

8. The terminal antenna according to claim 1, wherein the middle frame of the mobile phone is made of metal; a gap is formed between the first antenna and the middle frame of the mobile phone; and a gap is arranged between the second antenna and the middle frame of the mobile phone.

9. The terminal antenna of claim 1, wherein the feed is a radio frequency signal processing module in the folding screen handset.

10. An electronic device, characterized in that it comprises a terminal antenna according to any of claims 1-9.