CN115425390B

CN115425390B - Terminal antenna and electronic equipment

Info

Publication number: CN115425390B
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: 2023-07-14
Anticipated expiration: 2042-09-05
Also published as: CN115425390A

Abstract

The embodiment of the application provides a terminal antenna and electronic equipment, is applied to the antenna field, can improve the efficiency of terminal antenna among the folding screen cell-phone, and this folding screen cell-phone is including the pivot that is used for opening or closing 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 at 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 the first antenna and the second antenna and the folding screen mobile phone is closed, at least part of the first antenna and the second antenna are opposite, and the 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 phone is a popular form of phone in which the screen can be folded inwards to allow the phone to be converted between a larger size and a smaller size. A folded screen phone may be generally referred to as a closed state and a unfolded state.

Terminal antennas of folding screen handsets are typically disposed on the side frames. When the folding screen mobile phone is in a closed state, the terminal antennas on the side frames on the two sides are opposite, and a folding gap mode of the terminal antennas can be possibly excited. Because the mobile phone screen is a loss material, energy in the folding gap mode can be absorbed by the mobile phone screen, so that 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 is a problem to be solved.

Disclosure of Invention

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

In order to achieve the above purpose, the following technical solutions are adopted in the embodiments of the present application.

In a first aspect, a terminal antenna is provided for a folding screen handset including a hinge 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 at 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 the first antenna and the second antenna and the folding screen mobile phone is closed, at least part of the first antenna and the second antenna are opposite, and the currents of the opposite parts are in the same direction.

Based on the scheme, when the feed source feeds 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 opposite parts are in the same direction. Therefore, the 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 electromagnetic waves of the terminal antenna in an operating frequency band. Based on this scheme, the difference between the phase of the current fed to the first antenna and the phase of the current fed to the second antenna can be reduced, thereby facilitating the current sharing of the opposite portions of the first antenna and the second antenna.

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 used for: 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 be 180 degrees. Based on this 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 overlapped, 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 folding screen phone includes a first sensor therein for detecting a state of the folding screen phone. The state of the folding screen mobile phone comprises closing and opening. The first phase shifter and the second phase shifter are used for: 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 be 180 degrees. Based on the scheme, the state information of the folding screen mobile phone can be conveniently obtained by using the existing sensor in 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 further comprises a second radiator and a second parasitic branch, and 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 the first antenna and the second antenna and the folding screen mobile phone is closed, the first radiator is opposite to the second radiator, the first parasitic branch is opposite to the second parasitic branch, and the current directions of the 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, port matching and the like of each antenna can be conveniently adjusted through each matching device.

In one possible design, the first matching means is at least one of: capacitance, inductance, and switch. The second matching device is at least one of the following: capacitance, inductance, and switch. The third matching device is at least one of the following: capacitance, inductance, and switch. The fourth matching device is at least one of the following: capacitance, inductance, and switch. Based on the scheme, the impedance matching, port matching and the like of each antenna can be conveniently adjusted through elements such as capacitance, inductance, switch and the like

In one possible design, the cell phone center 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, the normal work of each antenna caused by the interference of the middle frame of the mobile phone made of metal materials can be avoided, and the efficiency of the terminal antenna is improved.

In one possible design, the feed is a radio frequency signal processing module in a folding screen handset. Based on the scheme, the feeding of the first antenna and the second antenna can be conveniently realized.

In a second aspect, an electronic device is provided, the electronic device comprising a terminal antenna as introduced in any of the first aspects.

It should be understood that the technical features of the technical solution provided in the second aspect may correspond to the terminal antenna provided in the first aspect and the possible designs thereof, so that the beneficial effects can be similar, and will not be repeated here.

Drawings

FIG. 1 is a schematic diagram of a folding screen handset in an open state;

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

FIG. 3 is a schematic diagram of current distribution and electric field distribution on the floor when the folding screen 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 application;

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

fig. 6 is a schematic current diagram of a terminal antenna in a folding screen mobile phone 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 application;

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

fig. 9 is a schematic diagram of 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 according to an embodiment of the present application;

fig. 11 is a schematic diagram of another terminal antenna according to an embodiment of the present application;

fig. 12 is a schematic diagram 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," etc. in the embodiments of the present application are used for distinguishing between different objects and not for defining a particular order. Furthermore, the words "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

In order to facilitate understanding of the embodiments of the present application, the application background of the present application is described first.

Fig. 1 is a schematic diagram of a folding 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 at two sides of the folding screen mobile phone. The antenna a is an active antenna, and receives a feed of the radio frequency 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 with respect to the rotating shaft 103 of the folding screen mobile phone.

It can be seen that when the folding screen mobile phone is in an open state, the current output by the rf signal processing module 102 flows into the radiator of the antenna a along the transmission line 101, and flows to both ends of the radiator from the position of the inflow into the radiator. The radiator of the antenna b is free of current.

When the folding screen handset is in the closed state, current on the radiator of antenna a will be coupled to antenna b. Fig. 2 is a schematic diagram of a folding mobile phone in a closed state. As shown in fig. 2, after the rf signal processing module 102 feeds the 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 a folding slit mode. In the folded slit mode, the current distribution on the floor of the folding screen handset is shown in fig. 3. Fig. 3 is a schematic diagram showing current distribution and electric field distribution on the floor when the folding screen mobile phone is in a closed state. The current is vertically directed along the floor plane in the direction of the rotating shaft 103, and the electric field passes through the mobile phone screen from the side of the antenna a to the side of the antenna b.

The mobile phone screen is a high-loss material for electromagnetic waves. Typically, the conductivity of the cell phone screen is about e ³ Omega/m, whereas the electrical conductivity of the metal is about e ⁶ Omega/m. Thus, the electric field will generate larger loss through the mobile phone screen. Making the efficiency of the terminal antenna low.

In order to solve the problem, the embodiment of the application provides a terminal antenna and electronic equipment, 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 (Laptop), desktop computers, etc. Exemplary embodiments of terminal devices include, but are not limited to, piggybacking

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 application.

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

The processor 401 may include one or more processing units, for example: the processor 401 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), a controller, a memory, a video stream codec, a digital signal processor (digital signal processor, DSP), a baseband processor, and/or a neural network processor (neural-network processing unit, NPU), etc. Wherein the different processing units may be separate devices or may be integrated in one or more processors 401.

The controller may be a neural hub and command center of the electronic device 400. The controller can generate operation control signals according to the instruction operation codes and the time sequence signals to finish the control of instruction fetching and instruction execution.

A memory may also be provided in the processor 401 for storing instructions and data. In some embodiments, the memory in the processor 401 is a cache memory. The memory may hold instructions or data that has just been used or recycled by the processor 401. If the processor 401 needs to reuse the instruction or data, it can be called directly from the memory. Repeated accesses are avoided and the latency of the processor 401 is reduced, thus improving the efficiency of the system.

In some embodiments, the processor 401 may include one or more interfaces. The interfaces may include an integrated circuit (inter-integrated circuit, I2C) interface, an integrated circuit built-in audio (inter-integrated circuit sound, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous receiver transmitter (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 (subscriber identity module, SIM) interface, and/or a universal serial bus (universal serial bus, USB) interface 411, among others.

The electronic device 400 implements display functions through a GPU, a display 403, and an application processor 401. The GPU is a microprocessor for image processing, and is connected to the display 403 and the 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 403 is used to display images, video streams, and the like.

The communication module 402 may include an antenna x, an antenna y, a mobile communication module 402A, and/or a wireless communication module 402B. Taking the communication module 402 as an example, the mobile communication module 402A and the wireless communication module 402B include an antenna x, an antenna y at the same time.

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

The antennas x and y are used for transmitting and receiving electromagnetic wave signals. Each antenna in electronic device 400 may be used to cover a single or multiple communication bands. Different antennas may also be multiplexed to improve the utilization of the antennas. For example: the antenna x may be multiplexed into a diversity antenna of 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 for wireless communication, including 2G/3G/4G/5G, applied on the electronic device 400. The mobile communication module 402A may include at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA), etc. The mobile communication module 402A may receive electromagnetic waves from the antenna x, perform processes such as filtering, amplifying, and the like on the received electromagnetic waves, and transmit the electromagnetic waves 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 through the antenna x to radiate. In some embodiments, at least some of the functional modules of the mobile communication module 402A may be provided 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 the 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 transmits the demodulated low frequency baseband signal to the 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 audio devices (not limited to speakers 406A, receivers 406B, etc.) or displays images or video streams through display 403. In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modem processor may be provided in the same device as the mobile communication module 402A or other functional module, independent of the processor 401.

The wireless communication module 402B may provide solutions for wireless communication including wireless local area network (wireless local area networks, WLAN) (e.g., wireless fidelity (wireless fidelity, wi-Fi) network), bluetooth (BT), global navigation satellite system (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), near field wireless communication technology (near field communication, NFC), infrared technology (IR), etc., applied to the electronic device 400. 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, modulates the electromagnetic wave signals, filters the 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 the signal, amplify the signal, and convert the signal into electromagnetic waves to radiate the electromagnetic waves through the antenna y.

In some embodiments, antenna x and mobile communication module 402A of electronic device 400 are coupled, and antenna y and wireless communication module 402B are coupled, such that electronic device 400 may communicate with a network and other devices through wireless communication techniques. The wireless communication techniques may include the Global System for Mobile communications (global system for mobile communications, GSM), general packet radio service (general packet radio service, GPRS), code division multiple access (code division multiple access, CDMA), wideband code division multiple access (wideband code division multiple access, WCDMA), time division code division multiple access (time-division code division multiple access, TD-SCDMA), long term evolution (long term evolution, LTE), BT, GNSS, WLAN, NFC, FM, and/or IR techniques, among others. The GNSS may include a global satellite positioning system (global positioning system, GPS), a global navigation satellite system (global navigation satellite system, GLONASS), a beidou satellite navigation system (beidou navigation satellite system, BDS), a quasi zenith satellite system (quasi-zenith satellite system, QZSS) and/or a satellite based augmentation system (satellite based augmentation systems, 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 (universal serial bus, USB) interface 411, a charge management module 412, a power management module 413, a battery 414, an audio module 406, a speaker 406A, a receiver 406B, a microphone 406C, an earphone interface 406D, a sensor module 405, keys 409, a motor, an indicator 408, a camera 407, and a subscriber identity module (subscriber identification module, SIM) card interface, etc.

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

The power management module 413 is used for connecting the battery 414, and the charging management module 412 and the processor 401. The power management module 413 receives input from the battery 414 and/or the charge management module 412 to power 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 battery 414 capacity, battery 414 cycle number, battery 414 health (leakage, impedance), and other parameters. In other embodiments, the power management module 413 may also be disposed in the processor 401. In other embodiments, the power management module 413 and the charge 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 enable expansion of the memory capabilities 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 stored in an external memory card.

Internal memory 404 may be used to store computer-executable program code that 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 also store one or more computer programs corresponding to the data transmission method provided in the embodiments of the present application.

Electronic device 400 may implement audio functionality through audio module 406, speaker 406A, receiver 406B, microphone 406C, ear-headphone interface 406D, and application processor 401, among others. Such as music playing, recording, etc.

Keys 409 include a power-on key, a volume key, etc. The keys 409 may be mechanical keys 409. Or may be a touch key 409. The electronic device 400 may receive key 409 inputs, generating key signal inputs related to user settings and function control of the electronic device 400.

The indicator 408 may be an indicator light, which may be used to indicate a state of charge, a change in charge, a message indicating a missed call, a notification, etc.

The SIM card interface is used for connecting the SIM card. The SIM card may be inserted into or removed from the SIM card interface to enable contact and separation with the electronic device 400. The electronic device 400 may support 1 or N SIM card interfaces, N being a positive integer greater than 1. The SIM card interface may support Nano SIM cards, micro SIM cards, etc. The same SIM card interface can be used to insert multiple cards simultaneously. The types of the plurality of cards may be the same or different. The SIM card interface may also be compatible with different types of SIM cards. The SIM card interface may also be compatible with external memory cards. The electronic device 400 interacts with the network through the SIM card to realize functions such as communication and data communication. In some embodiments, 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 components such as touch sensors, pressure sensors, gyroscope sensors, barometric pressure sensors, magnetic sensors, acceleration sensors, distance sensors, proximity sensors, ambient light sensors, fingerprint sensors, temperature sensors, bone conduction sensors, etc. to enable sensing and/or acquisition of different signals.

It is to be understood that the structure illustrated in this embodiment does not constitute a specific limitation on the electronic device 400. In other embodiments, electronic device 400 may include more or fewer components than shown, or may 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 which is used for opening or closing the folding screen mobile phone.

Fig. 5 is a schematic diagram of a mobile phone with a folding screen in an open state with a terminal antenna 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 mobile phone middle frame 504 at one side of the rotating shaft 503, and the second antenna 502 is disposed on the mobile phone middle frame 504 at the other side of the rotating shaft 503.

The mobile phone middle frame is a middle frame of a folding screen mobile phone. If the mobile phone middle frame is a metal conductor, a gap needs to be provided between the first antenna and the mobile phone middle frame, and the first antenna and the mobile phone middle frame cannot be directly connected. The second antenna is the same and will not be described in detail later.

The first antenna 501 is connected to the 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 limited herein.

In the terminal antenna provided by the embodiment of the present 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 the second antenna are opposite, and the 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 being identical means that the size, shape, feeding point position, matching element, etc. of the first antenna and the second antenna are identical. In this case, the phase difference of the first transmission line and the second transmission line may be less than a quarter wavelength. In this way, please refer to fig. 6, which is a schematic diagram of a current of a terminal antenna in a folding screen mobile phone in a closed state according to an embodiment of the present application. As shown in fig. 6, when the feed source feeds 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 the currents of the opposite parts are all in the same direction.

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

The currents of opposite parts of the first antenna and the second antenna are in the same direction, so that 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 application. 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 current flows from the feed through the first transmission line into the first antenna and to both ends of the first antenna. Likewise, current flows from the feed source through the second transmission line into 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 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 antenna and the second antenna to excite the folded slot mode. Therefore, the electric field excited by the first antenna and the second antenna can not generate larger loss on the mobile phone screen, so that 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.

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 respectively simulated, and the above conclusion is verified through the simulation result.

Fig. 8 is a schematic diagram of an efficiency curve of a terminal antenna according to an embodiment of the present application. As shown in fig. 8, the first 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 a closed state; the second curve is a schematic diagram of the 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 a closed state, the peak efficiency of the terminal antenna provided in the embodiment of the present application is about-5.14 dB, and the peak efficiency 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 greater than that of the terminal antenna shown in fig. 1.

When the mobile phone with the folding screen is in the closed state, the terminal antenna can still keep higher efficiency.

In addition, the first antenna and the second antenna in the terminal antenna provided by the application are active antennas, namely, the feed source simultaneously excites the first antenna and the second antenna to work, 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.

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, and the above conclusion is verified through the simulation result.

Fig. 9 is a schematic diagram of 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 the 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 an open state, the peak efficiency of the terminal antenna provided in the embodiment of the present application is about-5.76 dB, and the peak efficiency 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 greater than that of the terminal antenna shown in fig. 1.

Therefore, the efficiency of the terminal antenna provided in the embodiment of the present application is far greater than that of the terminal antenna shown in fig. 1.

In summary, when the feed source feeds 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 the currents of the opposite parts are in the same direction. Therefore, the 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 embodiment of the present application may operate in mobile communication bands such as 600-1200MHz,1400MHz-2690MHz,3300-7125MHz, and the like, which 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 one 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. Fig. 10 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 between 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 the junction 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 can be a switch, a capacitor, an inductor and the like, and are used for adjusting 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, etc. for adjusting impedance matching, port matching, etc. of the second antenna.

In one possible design, the terminal antenna provided in the embodiment of the present application may further include a first phase shifter and a second phase shifter. Fig. 11 is a schematic diagram of another terminal antenna according to an embodiment of the present application. As shown in fig. 11, the first phase shifter 1101 is disposed at the junction between the first transmission line 505 and the first antenna 501, and the second phase shifter 1102 is disposed at the junction between 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 the embodiment of the application, the first phase shifter is used for adjusting the phase of the first current, and the second phase shifter is used for adjusting the phase of the second current.

In one embodiment, the first and second phase shifters may be used to adjust the phase of the first current and the phase of the second current to be equal. Thus, 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 each also be connected to a first sensor of the 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 a 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 the phase of the first current and the 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 an open 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 apart according to the second instruction.

That is, the first phase shifter and the second phase shifter may be used to adjust the phase of the current fed to the first antenna and the phase of the current fed to the second antenna to be equal when the folding screen handset is in the closed state. When the folding screen mobile phone is in an open 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 when the folding screen mobile phone is in the closed state can be improved, and the efficiency of the terminal antenna when the folding screen mobile phone is in the open state can be further improved.

The foregoing embodiments have already described in detail that the phase of the first current is equal to the phase of the second current, which can improve the efficiency of the terminal antenna, and will not be described herein.

The following describes the adjustment of the phase of the first current and the phase of the second current to be 180 degrees apart to further improve the efficiency of the terminal antenna when the folding screen phone is in the open state.

When the folding screen phone is in a closed state and the phase of the first current and the phase of the second current are 180 degrees different, the current distribution in the folding screen phone is shown in fig. 12. Fig. 12 is a schematic diagram of current distribution on a folding screen mobile phone according to an embodiment of the present application. It can be seen that when the first antenna works, the current direction on the floor of the folding screen mobile phone points 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 current directions are the same and can be overlapped with each other, 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 an open 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, so that the efficiency of the terminal antenna when the folding screen mobile phone is in the open state can be further improved.

In addition, it should be noted that in the terminal antenna provided in this 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.

Illustratively, the first antenna and the second antenna may each be a slot antenna. Fig. 13 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 mobile phone middle frame 1304 on one side of the rotating shaft 1303, and the second antenna 1302 is disposed on the mobile phone middle frame 1304 on the other side of the rotating 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 end of the first radiator 1311 and the first parasitic stub 1321 is connected to the feed 1307 through a first transmission line 1305, and the coupling end of the second radiator 1312 and the second parasitic stub 1322 is connected to the feed 1307 through a second transmission line 1306.

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

It can be understood that the first antenna and the second antenna may be other types of antennas, and the first antenna and the second antenna may be located at other positions in the folding screen mobile phone, so long as it is required that when the folding screen mobile phone is closed, the first antenna and the second antenna are at least partially opposite, and the current directions of the opposite parts are the same, and the types and positions of the first antenna and the second antenna are not described herein.

The embodiment of the application also provides electronic equipment, which can comprise the terminal antenna described in any one of the embodiments.

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

Claims

1. The 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 at 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 the first antenna and the second antenna and the folding screen mobile phone is closed, at least part of the first antenna and the second antenna are opposite, and the currents of the opposite parts are in the same direction;

when the feed source feeds to the first antenna and the second antenna and the folding screen mobile phone is opened, the phase of the current fed into the first antenna is opposite to the phase of the current fed into the second antenna, and the electric field excited by the first antenna on the floor of the folding screen mobile phone and the electric field excited by the second antenna on the floor of the folding screen mobile phone are in the same direction.

2. The terminal antenna of claim 1, wherein a 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 electromagnetic waves of the terminal antenna in an operating frequency band.

3. The terminal antenna of claim 1, wherein the terminal antenna further comprises 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; and when the folding screen mobile phone is opened, adjusting the difference between the phase of the current fed into the first antenna and the phase of the current fed into the second antenna to be 180 degrees.

4. A terminal antenna according to claim 3, wherein the folding screen mobile phone comprises a first sensor, and the first sensor is used for detecting the state of the folding screen mobile phone; the state of the folding screen mobile phone comprises closing and opening;

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

5. The terminal antenna of claim 1, wherein the first antenna comprises 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 further 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 the first antenna and the second antenna and the folding screen mobile phone is closed, the first radiator is opposite to the second radiator, the first parasitic branch is opposite to the second parasitic branch, and the current directions of the 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 means is at least one of: capacitance, inductance, switch; the second matching device is at least one of the following: capacitance, inductance, switch; the third matching device is at least one of the following: capacitance, inductance, switch; the fourth matching device is at least one of the following: capacitance, inductance, and switch.

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

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.