CN115663455B

CN115663455B - Terminal antenna and electronic equipment

Info

Publication number: CN115663455B
Application number: CN202211227091.3A
Authority: CN
Inventors: 官乔; 魏鲲鹏; 张澳芳; 胡义武
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2022-10-09
Filing date: 2022-10-09
Publication date: 2024-03-29
Anticipated expiration: 2042-10-09
Also published as: CN115663455A

Abstract

The embodiment of the application provides a terminal antenna and electronic equipment, which are applied to the field of antennas, wherein the section height of the terminal antenna is controllable, the bandwidth is wider, the efficiency is higher, and the terminal antenna is an omnidirectional antenna with better radiation performance. The terminal antenna includes: the first radiator, the grounding element, the feeding element and the inductance element. The first radiator is a disc which is in a regular polygon or a circle. The grounding element is a metal disc and has a size larger than that of the first radiator. The first radiator is arranged in parallel with the grounding element, and a straight line of the center of the first radiator and the center of the grounding element is perpendicular to a plane of the first radiator. One end of the feeding element is connected with the center of the first radiator, and the other end of the feeding element is connected with the center of the grounding element. One end of the inductance element is connected with the edge of the first radiator, and the other end of the inductance element is connected with the grounding element. The resonant frequency of the terminal antenna is determined by the size of the first radiator, the size of the ground element, the inductance of the feed element, the number of inductive elements and the inductance of the inductive elements.

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

With the development of communication technology, omni-directional antennas are increasingly used in electronic devices. The omnidirectional antenna is characterized in that the omnidirectional antenna is a beam which uniformly radiates at 360 degrees on a horizontal direction diagram and a beam with a certain width on a vertical direction diagram, so that the omnidirectional antenna has the characteristics of omnidirectional high gain, large signal coverage range and the like.

Common vertically polarized omni-directional antennas such as Franklin (Franklin) antennas, symmetrical array antennas, series-fed printed array antennas, rotating field antennas, etc. have inevitably high cross sections, i.e. high vertical heights, which are inconvenient to be arranged in electronic devices. However, although the ENG (Epsilon Negative Material) single-layer PCB (Printed Circuit Board ) antenna has the advantage of low profile, the directional diagram has a power zero point on the horizontal plane, i.e. the signal transmitting and receiving performance in the horizontal direction is weaker, and the signal coverage requirement of the omnidirectional antenna cannot be met.

Therefore, how to design a vertical polarization omni-directional antenna with controllable profile height and good radiation performance is a problem to be solved.

Disclosure of Invention

The embodiment of the application provides a terminal antenna and electronic equipment, wherein the section height of the terminal antenna is controllable, the bandwidth is wider, the efficiency is higher, and the terminal antenna is a vertical polarization omnidirectional antenna with better radiation performance.

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

In a first aspect, there is provided a terminal antenna comprising: the antenna comprises a first radiator, a grounding element, a feeding element and at least one inductance element. The first radiator is a disc which is in a regular polygon or a circle. The grounding element is a metal disc with the same shape as the first radiator, and the size of the grounding element is larger than that of the first radiator. The grounding element is grounded. The first radiator and the grounding element are arranged in parallel, and a straight line where the center of the first radiator and the center of the grounding element are located is perpendicular to a plane where the first radiator is located. One end of the feeding element is connected with the center of the first radiator, and the other end of the feeding element is connected with the center of the grounding element. The feeding element is for feeding the first radiator. One end of the inductance element is connected with the edge of the first radiator, and the other end of the inductance element is connected with the grounding element. When the number of the inductance elements is a plurality of, the inductance elements are uniformly distributed on the edge of the first radiator. The resonant frequency of the terminal antenna is determined by the size of the first radiator, the size of the ground element, the inductance of the feed element, the number of inductive elements and the inductance of the inductive elements.

Based on the scheme, since the resonant frequency of the terminal antenna is determined by the size of the first radiator, the size of the grounding element, the inductance of the feeding element, the number of inductance elements and the inductance of the inductance elements, the sectional height of the terminal antenna can be adjusted by controlling the size of each element under the condition that the resonant frequency of the terminal antenna is fixed, so that the sectional height of the terminal antenna can be controlled. In addition, the terminal antenna provided by the embodiment of the application has wider bandwidth, better efficiency and signal coverage range which can meet the requirement of omnidirection, and is confirmed by simulation.

In one possible design, the first radiator is provided with a first slit of the same shape as the first radiator. The first slit divides the first radiator into a ring-shaped radiator and a disk-shaped radiator. The center of the annular radiator is the same as the center of the disk-shaped radiator. The distance from the first slit to the center of the disk-shaped radiator is smaller than the distance from the first slit to the edge of the annular radiator. The width of the first slit is less than or equal to one tenth of the distance from the first slit to the center of the disk-shaped radiator. Based on the scheme, the annular radiator can be fed in a coupling feed mode, so that the impedance bandwidth of the terminal antenna can be widened.

In one possible design, a plurality of second slits are also provided in the annular radiator. The second slit is along the radial direction of the annular radiator. Based on this scheme, because the second gap is along the current direction of cyclic annular radiator during operation, consequently can not exert an influence to cyclic annular radiator's normal work.

In one possible design, the terminal antenna further comprises: a magnetic ring. The quasi-magnetic current ring is formed by coupling a plurality of arc-shaped metal sheets with the same length end to end. The shape of the magnetic ring is the same as the shape of the first radiator. The magnetic-like ring has a size greater than the first radiator. The quasi-magnetic current ring is arranged on the plane of the first radiator. The center of the quasi-magnetic current ring coincides with the center of the first radiator. Based on the scheme, the horizontal polarization characteristic can be provided for the terminal antenna, and the working bandwidth of the terminal antenna can be improved.

In one possible design, the coupling of the arcuate metal sheets is an inter-digital coupling or an overlapping coupling. Based on the scheme, the impedance bandwidth of the quasi-magnetic current ring is widened.

In one possible design, the first radiator and the grounding element are discs. The feed element is a conductive copper column and is connected with an inner core wire of the coaxial cable; the ground element is connected to the outer conductor of the coaxial cable. The inductance element is a serpentine trace. The number of inductive elements is 6.

In one possible design, the radius of the first radiator is 12.7mm. The radius of the ground element is 15mm. The height of the feed element and the inductive element are each 6.5mm. The cross-sectional radius of the feed element is 1mm. The width of the inductive element is 4mm. The line width of the inductive element was 0.5mm. The gaps between the inductor element traces were 0.5mm apart. Based on the scheme, the terminal antenna provided by the embodiment of the application has a lower section height and works between 5.3GHz and 6 GHz.

In one possible design, the terminal antenna has a first resonant frequency and a second resonant frequency, the first resonant frequency being lower than the second resonant frequency. At the first resonant frequency, the terminal antenna operates in the zero order mode. At the second resonant frequency, the terminal antenna operates in a higher order mode. Based on the scheme, the terminal antenna provided by the embodiment of the application has wider working bandwidth.

In one possible design, the larger the inductance of the inductive element, the lower the first resonant frequency of the terminal antenna. The larger the inductance of the feed element, the lower the second resonant frequency of the terminal antenna. Based on the scheme, the terminal antenna can be conveniently tuned.

In one possible design, one or more of the following elements may be included in the at least one inductive element: serpentine wiring, lumped inductance, and wires with inductance values. Based on the scheme, technicians can conveniently select required inductance elements according to requirements, and expansibility is high.

In one possible design, the feeding element is a conductive copper pillar. Based on the scheme, the feeding efficiency of the feeding element is improved.

In a second aspect, there is provided an electronic device comprising a terminal antenna according to 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 an ENG single-layer PCB antenna;

fig. 2 is a diagram of an antenna;

fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 4 is a schematic diagram of a terminal antenna according to an embodiment of the present application;

fig. 5 is an exploded view of a terminal antenna according to an embodiment of the present application;

fig. 6 is a directional diagram of a terminal antenna according to an embodiment of the present application;

fig. 7 is a schematic diagram of S11 and an efficiency curve of a terminal antenna according to an embodiment of the present application;

fig. 8 is an electric field distribution diagram of a terminal antenna according to an embodiment of the present application;

fig. 9 is a diagram of still another electric field distribution diagram of a 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 disclosure;

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

fig. 12 is an S11 schematic diagram of a plurality of terminal antennas provided in an embodiment of the present application;

fig. 13 is an S11 schematic diagram of a plurality of terminal antennas provided in an embodiment of the present application;

fig. 14 is an exploded view of yet another terminal antenna according to an embodiment of the present application;

fig. 15 is a schematic diagram of S11 and an efficiency curve of another terminal antenna according to an embodiment of the present application;

fig. 16 is an electric field distribution diagram of another terminal antenna according to an embodiment of the present disclosure;

fig. 17 is an electric field distribution diagram of another terminal antenna according to an embodiment of the present disclosure;

fig. 18 is an exploded view of yet another terminal antenna according to an embodiment of the present application;

fig. 19 is a schematic diagram of S11 and an efficiency curve of another terminal antenna according to an embodiment of the present application;

fig. 20 is an electric field distribution diagram of another terminal antenna according to an embodiment of the present disclosure;

fig. 21 is an electric field distribution diagram of another terminal antenna according to an embodiment of the present disclosure;

FIG. 22 is a graph of a current vector field J profile of yet another terminal antenna provided in an embodiment of the present application;

FIG. 23 is a graph of a current vector field J profile of yet another terminal antenna provided in an embodiment of the present application;

Fig. 24 is an exploded view of yet another terminal antenna according to an embodiment of the present application;

fig. 25 is a schematic diagram of S11 and an efficiency curve of another terminal antenna according to an embodiment of the present disclosure;

fig. 26 is a schematic view of a first radiator 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.

The section height of the antenna means the height in the vertical direction when the antenna is placed in a form of being perpendicular to the ground. It will be appreciated that an omni-directional antenna with a higher profile may occupy a larger height space within the electronic device, and may not be conveniently disposed in the electronic device.

In the related art, the antenna with a lower profile generally cannot meet the requirements of vertical polarization and omni-direction. Taking an ENG single-layer PCB antenna as an example. Please refer to fig. 1, which is a schematic diagram of an ENG single-layer PCB antenna. As shown in fig. 1, the antenna includes a radiating loop 101, a disc 102, a feed line 103, and five serpentine traces 104. The disc 102 is arranged within the ring of the radiating ring 101 and is concentric with the radiating ring 101. The feed line 103 and the five serpentine traces 104 are evenly distributed between the disc 102 and the radiating ring 101. The disc 102 feeds the radiating ring 101 through a feed line 103. The serpentine trace 104 may be equivalently an inductance. The operating frequency of the antenna is determined by the width of the radiating loop 101, the radius of the disc 102, the equivalent inductance of the serpentine trace 104, etc.

It can be seen that the antenna shown in fig. 1 has a lower cross section, and when in operation, current uniformly flows from the center of the disc to the periphery, so that the antenna is a vertically polarized antenna. However, the signal coverage of this antenna is large, but the omnidirectional requirement is still not satisfied. This can be verified by the pattern of the antenna as shown in fig. 2.

Please refer to fig. 2, which is a diagram of an antenna. Specifically, fig. 2 is a diagram of the antenna shown in fig. 1. It should be noted that the darker the region in fig. 2, the stronger the signal representing the direction. Conversely, the lighter the area, the weaker the signal representing that direction. As can be seen from fig. 2, the antenna shown in fig. 1 has very weak signal strength in the horizontal direction. That is, it is difficult for the antenna to transmit and receive signals normally in the horizontal direction. Thus, the antenna shown in fig. 1 cannot meet the "omni-directional" requirement of an electronic device for an antenna.

In summary, how to design a vertically polarized omnidirectional antenna with a controllable profile and a good radiation performance is a problem to be solved.

In order to solve the problem, the embodiment of the application provides a terminal antenna and electronic equipment, wherein the section height can be lower, signals can cover all directions, and the radiation performance is excellent.

The terminal antenna provided by the embodiment of the application can be applied to electronic equipment. An electronic device may refer to a device provided with a terminal antenna, such as a cell phone, a tablet, a wearable device (e.g., a smart watch), a vehicle-mounted device, a Laptop (Laptop), a desktop computer, etc. Exemplary embodiments of terminal devices include, but are not limited to, piggybackingOr other operating system.

As an example, please refer to fig. 3, which is a schematic structural diagram of an electronic device 300 according to an embodiment of the present application.

As shown in fig. 3, the electronic device 300 may include a processor 301, a communication module 302, a display 303, and the like.

The processor 301 may include one or more processing units, for example: the processor 301 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 301.

The controller may be a neural hub and command center of the electronic device 300. 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 301 for storing instructions and data. In some embodiments, the memory in the processor 301 is a cache memory. The memory may hold instructions or data that the processor 301 has just used or recycled. If the processor 301 needs to reuse the instruction or data, it may be called directly from the memory. Repeated accesses are avoided and the latency of the processor 301 is reduced, thus improving the efficiency of the system.

In some embodiments, processor 301 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 301 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 311, among others.

The electronic device 300 implements display functions through a GPU, a display screen 303, and an application processor 301, etc. The GPU is a microprocessor for image processing, and is connected to the display 303 and the application processor 301. The GPU is used to perform mathematical and geometric calculations for graphics rendering. Processor 301 may include one or more GPUs that execute program instructions to generate or change display information.

The display 303 is used to display images, video streams, and the like.

The communication module 302 may include an antenna x, an antenna y, a mobile communication module 302A, and/or a wireless communication module 302B. Taking the communication module 302 as an example, the mobile communication module 302A and the wireless communication module 302B include an antenna x, an antenna y.

The wireless communication function of the electronic device 300 can be implemented by an antenna x, an antenna y, a mobile communication module 302A, a wireless communication module 302B, 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 the electronic device 300 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 302A may provide a solution for wireless communication, including 2G/3G/4G/5G, as applied to the electronic device 300. The mobile communication module 302A may include at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA), etc. The mobile communication module 302A 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 302A may further amplify the signal modulated by the modem processor, and convert the signal into electromagnetic waves through the antenna x to radiate the electromagnetic waves. In some embodiments, at least some of the functional modules of the mobile communication module 302A may be provided in the processor 301. In some embodiments, at least some of the functional modules of the mobile communication module 302A may be provided in the same device as at least some of the modules of the processor 301.

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 an audio device (not limited to speaker 306A, receiver 306B, etc.), or displays images or video streams through display 303. 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 302A or other functional module, independent of the processor 301.

The wireless communication module 302B 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 300. The wireless communication module 302B may be one or more devices that integrate at least one communication processing module. The wireless communication module 302B 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 301. The wireless communication module 302B may also receive a signal to be transmitted from the processor 301, frequency modulate the signal, amplify the signal, and convert the signal into electromagnetic waves through the antenna y to radiate the electromagnetic waves.

In some embodiments, antenna x and mobile communication module 302A of electronic device 300 are coupled, and antenna y and wireless communication module 302B are coupled, such that electronic device 300 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. 3, in some implementations, the electronic device 300 may further include an external memory interface 310, an internal memory 304, a universal serial bus (universal serial bus, USB) interface 311, a charge management module 312, a power management module 313, a battery 314, an audio module 306, a speaker 306A, a receiver 306B, a microphone 306C, an earphone interface 306D, a sensor module 305, keys 309, a motor, an indicator 308, a camera 307, and a subscriber identity module (subscriber identification module, SIM) card interface, etc.

The charge management module 312 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 312 may receive a charging input of a wired charger through the USB interface 311. In some wireless charging embodiments, the charge management module 312 may receive wireless charging input through a wireless charging coil of the electronic device 300. The battery 314 is charged by the charge management module 312, and the electronic device 300 can be powered by the power management module 313.

The power management module 313 is used to connect the battery 314, the charge management module 312 and the processor 301. The power management module 313 receives input from the battery 314 and/or the charge management module 312 and provides power to the processor 301, the internal memory 304, the external memory, the display 303, the camera 307, the wireless communication module 302B, and the like. The power management module 313 may also be configured to monitor the capacity of the battery 314, the number of cycles of the battery 314, and parameters such as the state of health (leakage, impedance) of the battery 314. In other embodiments, the power management module 313 may also be provided in the processor 301. In other embodiments, the power management module 313 and the charge management module 312 may be provided in the same device.

The external memory interface 310 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 300. The external memory card communicates with the processor 301 via an external memory interface 310 to implement data storage functions. For example, files such as music, video streams, etc. are stored in an external memory card.

The internal memory 304 may be used to store computer executable program code including instructions. The processor 301 executes various functional applications of the electronic device 300 and data processing by executing instructions stored in the internal memory 304.

Electronic device 300 may implement audio functionality through audio module 306, speaker 306A, receiver 306B, microphone 306C, headphone interface 306D, and application processor 301, among others. Such as music playing, recording, etc.

Keys 309 include a power on key, a volume key, etc. The keys 309 may be mechanical keys 309. Or may be a touch key 309. The electronic device 300 may receive key 309 inputs, generating key signal inputs related to user settings and function controls of the electronic device 300.

The indicator 308 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 300. The electronic device 300 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 300 interacts with the network through the SIM card to realize functions such as communication and data communication. In some embodiments, the electronic device 300 employs esims, namely: an embedded SIM card. The eSIM card can be embedded in the electronic device 300 and cannot be separated from the electronic device 300.

The sensor module 305 in the electronic device 300 may include components such as touch sensors, pressure sensors, gyroscopic 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.

The electronic device to which the terminal antenna provided in the embodiment of the present application is applied is described above. It should be understood that the structure illustrated in this embodiment does not constitute a specific limitation on the electronic device 300. In other embodiments, electronic device 300 may include more or fewer components than shown, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The terminal antenna provided in the embodiment of the present application is specifically described below. Fig. 4 is a schematic diagram of a terminal antenna according to an embodiment of the present application.

As shown in fig. 4, includes: a first radiator 401, a grounding element 402, a feeding element 403 and at least one inductive element 404. In the embodiment of the present application, the number of the inductance elements may be four, six, eight, etc., which is not particularly limited herein.

The first radiator 401 is a disc having a regular polygon or a circle. The first radiator 401 shown in fig. 4 is a circular disk, and the case where the first radiator is a regular polygon disk is not shown. In the embodiment of the present application, the regular polygon may be a regular triangle, a regular quadrilateral, a regular hexagon, or the like.

The grounding element 402 is a metal disk having the same shape as the first radiator 401, and the size of the grounding element 402 is larger than the first radiator 401. The grounding element 402 is grounded. That is, when the first radiator 401 is circular, the grounding element 402 is a circular metal disc, and the circular area of the grounding element 402 is larger than the circular area of the first radiator 401. When the first radiator 401 is a regular polygon, the grounding element 402 is a regular polygon metal disc, and the regular polygon area of the grounding element 402 is larger than the regular polygon area of the first radiator 401.

The first radiator 401 is disposed parallel to the grounding element 402, and a line where the center of the first radiator 401 and the center of the grounding element 402 are located is perpendicular to a plane where the first radiator 401 is located. For example, the first radiator 401 and the grounding element 402 are both circular discs. The center of the first radiator 401 is the center of its circle and the center of the grounding element 402 is the center of its circle. The line of the centers of the two is perpendicular to the plane of the first radiator 401, and it can be understood that the line is also perpendicular to the plane of the grounding element 402. In other words, the projection of the center of the first radiator 401 onto the ground element 402 falls on the center of the ground element 402.

One end of the feeding element 403 is connected to the center of the first radiator 401, and the other end of the feeding element 403 is connected to the center of the grounding element 402. The feeding element 403 is used to feed the first radiator 401. It will be appreciated that when the feeding element 402 feeds the first radiator 401, a feeding signal flows from the feeding element 402 to the center of the first radiator 401 and flows from the center of the first radiator 401 to the periphery of the first radiator 401. In practical applications, the feeding element 403 may be a conductor with good conductivity, such as a copper pillar, and is not particularly limited herein.

One end of the inductance element 404 is connected to the edge of the first radiator 401, and the other end of the inductance element 404 is connected to the ground element 402. In the embodiment of the present application, the inductance element 404 may be a serpentine trace, a lumped inductance, a wire with an inductance value, or the like. In addition, taking the first radiator 401 as an example of a disc, the edge of the first radiator 401 is referred to as the edge of the disc.

When the number of the inductance elements 404 is plural, each inductance element 404 is uniformly distributed on the edge of the first radiator 401. In this embodiment, the fact that each inductance element 404 is uniformly distributed on the edge of the first radiator 401 means that the included angles of the connecting lines between each adjacent inductance element 404 and the center of the circle are equal. For example, when the number of the inductance elements 404 is 4, the included angle between each adjacent inductance element 404 and the connecting line of the circle center is 90 °. For another example, when the number of the inductance elements 404 is 6, the included angle between each adjacent inductance element 404 and the connecting line of the circle center is 60 °.

The resonant frequency of the terminal antenna is determined by the size of the first radiator 401, the size of the ground element 402, the inductance of the feeding element 403, the number of inductive elements 404 and the inductance of the inductive elements 404. That is, the resonance frequencies of the corresponding terminal antennas are different according to the above parameters.

It can be seen that the cross-sectional height of the terminal antenna provided in the embodiment of the present application is determined by the distance between the first radiator 401 and the grounding element 402, and the distance between the first radiator 401 and the grounding element 402 is determined by the height of the feeding element 403 and the height of the inductance element 404. Therefore, in the terminal antenna provided in the embodiment of the present application, the height of the feeding element 403 and the height of the inductance element 404 may be designed to be lower, and by adjusting the size of the first radiator 401, the size of the grounding element 402 and the like ensure that the resonant frequency is fixed, so that the section of the terminal antenna is lower. That is, the cross-sectional height of the terminal antenna provided in the embodiments of the present application is controllable.

In addition, the terminal antenna provided by the embodiment of the application is a horizontal omnidirectional vertical polarized antenna, and is wide in bandwidth and high in efficiency. The conclusion is verified by simulation experiments below.

In the following simulation, an exploded view of the structure of the terminal antenna is shown in fig. 5. Fig. 5 is an exploded view of a terminal antenna according to an embodiment of the present application. In fig. 5, the first radiator 401 and the grounding element 402 are discs, the feeding element 403 is a conductive copper pillar, the inductance element 404 is a serpentine trace, and the number of the inductance elements 404 is 6. The parameters of each element are as follows: the radius of the first radiator 401 is 12.7mm, the radius of the grounding element 402 is 15mm, the heights of the feeding element 403 and the inductance element 404 are 6.5mm, the radius of the cross section of the feeding element 403 is 1mm, the overall width of the inductance element 404 (serpentine trace) is 4mm, the line width is 0.5mm, and the gap between traces is 0.5mm.

First, when the terminal antenna shown in fig. 5 is placed perpendicularly to the ground, it is illustrated in a pattern of meridian planes that the terminal antenna is a vertically polarized antenna.

When the terminal antenna shown in fig. 5 is placed perpendicular to the ground, the directional diagram of the meridian plane of the terminal antenna is shown in fig. 6. The meridian plane when the terminal antenna is placed perpendicular to the ground, namely the longitudinal section of the terminal antenna passing through the center of the circle.

Fig. 6 is a schematic diagram of a terminal antenna according to an embodiment of the present application. In fig. 6, the directions of 0 ° and 180 ° are the directions perpendicular to the ground, and the directions of-90 ° and 90 ° are the directions horizontal to the ground.

The curves in fig. 6 are both the total polarization of the terminal antenna in all directions of the meridian plane and the vertical polarization component of the terminal antenna in all directions of the meridian plane. In other words, the total polarization of the terminal antenna in each direction of the meridian plane is substantially the same as the perpendicular polarization component of the terminal antenna in each direction of the meridian plane.

Therefore, it can be determined based on the above-mentioned pattern shown in fig. 6 that the terminal antenna provided in the embodiment of the present application is a vertically polarized antenna.

Second, it is illustrated by S11 and efficiency curves that the terminal antenna shown in fig. 5 has a wide bandwidth and high efficiency.

Fig. 7 is a schematic diagram of S11 and an efficiency curve of a terminal antenna according to an embodiment of the present application. In fig. 7, a curve a is S11 of the terminal antenna, and a curve b is an efficiency curve of the terminal antenna. As can be seen from the curve a, the resonance point of the terminal antenna shown in fig. 5 is M1, and the corresponding resonance frequency is about 5.34 GHz. As can be seen from curve b, the efficiency of the terminal antenna is around-0.08 dB at the frequency at which the resonance point is located, i.e. M2.

In addition, the curve a is asymmetric on both sides of the resonance point M1, which indicates that the terminal antenna has a resonance point near the point M3, i.e. about 5.95GHz, and another operation mode is excited.

Therefore, the terminal antenna provided by the embodiment of the application has wider bandwidth and higher efficiency.

The terminal antenna shown in fig. 5 was verified to have two modes of operation by performing electric field distribution simulation on the terminal antenna.

At point M1, i.e., around 5.34GHz, the electric field distribution of the terminal antenna shown in fig. 5 is shown in fig. 8. Fig. 8 is an electric field distribution diagram of a terminal antenna according to an embodiment of the present application.

In the embodiment of the application, the lower resonant frequency of the terminal antenna is referred to as a first resonant frequency, and the working mode corresponding to the first resonant frequency is referred to as an ENG zero-order mode. As can be seen from fig. 8, in the ENG zero-order mode, the electric field of the terminal antenna is uniformly distributed in constant amplitude and phase between the first radiator and the ground element, and the electric field direction is basically the direction in which the first radiator is located and is directed to the direction in which the ground element is located.

Whereas at the M3 point, i.e. around 5.95GHz, the electric field distribution of the terminal antenna shown in fig. 5 is shown in fig. 9. Referring to fig. 9, a further electric field distribution diagram of a terminal antenna according to an embodiment of the present application is shown.

In the embodiment of the present application, the higher resonant frequency of the terminal antenna is referred to as a second resonant frequency, and the working mode corresponding to the second resonant frequency is referred to as a disc loading antenna mode, that is, a higher order mode. As can be seen from fig. 9, in the disc loaded antenna mode, the electric field of the terminal antenna is more concentrated and distributed between the open end of the first radiator and the open end of the ground element, and the small pitch area of the serpentine trace. And the direction of the electric field is substantially directed from the direction of the ground element to the direction of the first radiator.

Based on the electric field distribution diagrams shown in fig. 8 and fig. 9, it can be seen that the terminal antenna provided in the embodiment of the present application has two different electric field distributions, that is, two different operation modes.

The terminal antenna shown in fig. 5 is in the ENG zero-order mode, and the pattern is shown in fig. 10. Referring to fig. 10, a schematic diagram of another terminal antenna according to an embodiment of the present application is provided. The darker the area in fig. 10, the stronger the signal representing that direction. Conversely, the lighter the area, the weaker the signal representing that direction.

As can be seen from fig. 10, when the terminal antenna is in the ENG zero-order mode, the signal strength in each direction is more uniform, and the uniformity is better. And the signal intensity in all directions is stronger.

And when the terminal antenna shown in fig. 5 is in the disc loading antenna mode, the directional diagram is shown in fig. 11. Referring to fig. 11, a schematic diagram of another terminal antenna according to an embodiment of the present application is provided. Similarly, the darker the area in fig. 11, the stronger the signal representing that direction. Conversely, the lighter the area, the weaker the signal representing that direction.

As can be seen from fig. 11, when the terminal antenna is in the disc loading antenna mode, the signal strength in each direction is also more uniform, and the uniformity is better. And the signal intensity in all directions is stronger.

Based on the above simulation, it can be seen that the terminal antenna provided in the embodiment of the present application is an omni-directional antenna with vertical polarization, and the signal coverage angle is larger. The section height of the terminal antenna is controllable, and the section height of the terminal antenna can be controlled to be about 6.5mm by the design shown in fig. 5. Therefore, the terminal antenna can be conveniently arranged in the electronic equipment and cannot occupy the overlarge height space of the electronic equipment, and the practicability and the universality are both higher.

In addition, the resonant frequency of the terminal antenna provided in the embodiment of the present application is determined by the size of the first radiator, the size of the grounding element, the inductance of the feeding element, the number of inductance elements, the inductance of the inductance elements, and the like. The tuning scheme of the terminal antenna provided in the embodiment of the present application is illustrated by sweeping the inductance of the feeding element and the inductance of the inductance element.

Firstly, the inductance of the feeding element is swept. Please refer to fig. 12, which is a schematic diagram of S11 of a plurality of terminal antennas according to an embodiment of the present application. The various antennas have the same parameters as the terminal antenna shown in fig. 5 except for the inductance of the inductance element. The plurality of terminal antennas includes a first antenna, a second antenna, a third antenna, and a fourth antenna. The inductance of the inductance element in the first antenna is 3nH, the inductance of the inductance element in the second antenna is 5nH, the inductance of the inductance element in the third antenna is 7nH, and the inductance of the inductance element in the fourth antenna is 9nH.

In fig. 12, S11 of the first antenna is a curve c, S11 of the second antenna is a curve d, S11 of the third antenna is a curve e, and S11 of the fourth antenna is a curve f. It can be seen that as the inductance of the inductive element increases, the first resonant frequency of the terminal antenna becomes lower and the second resonant frequency is substantially unchanged. In other words, the resonant frequency of the terminal antenna at the ENG zero-order mode is inversely related to the inductance of the inductive element, and the resonant frequency at the disc loading antenna mode is substantially independent of the inductance of the inductive element.

The inductance of the feed element is swept as follows. Please refer to fig. 13, which is a schematic diagram of S11 of a plurality of terminal antennas according to an embodiment of the present application. The various antennas have the same parameters as the terminal antenna shown in fig. 5 except for the inductance of the feeding element. The plurality of terminal antennas includes a fifth antenna, a sixth antenna, a seventh antenna, and an eighth antenna. The inductance of the feeding element in the fifth antenna is 0.5nH, the inductance of the feeding element in the sixth antenna is 1nH, the inductance of the feeding element in the seventh antenna is 1.5nH, and the inductance of the feeding element in the eighth antenna is 2nH.

In fig. 13, S11 of the fifth antenna is a curve g, S11 of the sixth antenna is a curve h, S11 of the seventh antenna is a curve i, and S11 of the eighth antenna is a curve j. It can be seen that as the inductance of the feeding element increases, the first resonant frequency of the terminal antenna is substantially unchanged and the second resonant frequency is lower and lower. In other words, the resonant frequency of the terminal antenna in the ENG zero-order mode is substantially independent of the inductance of the feed element, and the resonant frequency of the terminal antenna in the disc loading antenna mode is inversely related to the inductance of the feed element.

Based on the above fig. 12 and fig. 13, it can be seen that, in the terminal antenna provided in the embodiment of the present application, the resonant frequency of the ENG zero-order mode can be controlled by adjusting the inductance of the inductance element, and the resonant frequency of the disc loading antenna mode can be controlled by adjusting the inductance of the feeding element. It should be understood that the tuning method of the terminal antenna provided in the embodiment of the present application is described herein by taking the inductance of the inductance element and the inductance of the feeding element as examples. In some embodiments, the terminal antenna may also be tuned by adjusting the size of the first radiator or the grounding element, which is not described here.

It should be noted that the terminal antenna described in fig. 3 to 13 is only one example of the terminal antenna provided in the embodiment of the present application. Some other examples are shown below.

As a possible design, the first radiator may be provided with a slit of the same shape as the first radiator. The slit divides the first radiator into a ring-shaped radiator and a disc-shaped radiator; the center of the annular radiator is the same as the center of the disc-shaped radiator; the distance from the gap to the center of the disc-shaped radiator is smaller than the distance from the gap to the edge of the annular radiator; the width of the gap is less than or equal to one tenth of the distance from the gap to the center of the disk-shaped radiator.

It will be appreciated that the centers of the first radiator and the annular radiator are located on the disc-shaped radiator. The feed element is thus connected to the disk-shaped radiator. After the feeding element feeds the feeding signal to the disc-shaped radiator, the disc-shaped radiator may couple the feeding signal to the ring-shaped radiator through the above-mentioned slot.

The terminal antenna of the above design has a similar pattern and polarization characteristics as the terminal antenna described in fig. 5. The verification is performed by simulation of the terminal antenna shown in fig. 14 described below.

Referring to fig. 14, an exploded view of another terminal antenna according to an embodiment of the present application is shown. The terminal antenna comprises a first radiator 1401, a ground element 1402, a feed element 1403 and six inductive elements 1404.

The first radiator 1401 is a circular disk, and is provided with a circular first slit 1411. The first slit 1411 divides the first radiator 1401 into a ring-shaped radiator 1421 and a disc-shaped radiator 1431. The center of the annular radiator 1421 is the same as the center of the disk-shaped radiator 1431. The distance from the first slit 1411 to the disk-shaped radiator 1431 is smaller than the distance from the first slit 1411 to the edge of the annular radiator 1421. The width of the first slit 1411 is less than or equal to one tenth of the distance of the first slit 1411 to the center of the disc-shaped radiator 1431.

The grounding element 1402 is a circular metal disc, and the size of the grounding element 1402 is larger than the first radiator 1401. The grounding element 1402 is grounded. The first radiator 1401 is disposed parallel to the grounding element 1402, and a line where the center of the first radiator 1401 and the center of the grounding element 1402 are located is perpendicular to a plane where the first radiator 1401 is located. The feeding element 1403 is a conductive copper pillar, one end of which is connected to the center of the first radiator 1401, and the other end of which is connected to the center of the ground element 1402. The feeding element 1403 is used for feeding the first radiator 1401. The inductive element 1404 is a serpentine trace with one end connected to the edge of the first radiator 1401 and the other end connected to the ground element 1402. The inductive elements 1404 are uniformly distributed over the edges of the first radiator 1401. The resonant frequency of the terminal antenna is determined by the size of the first radiator 1401, the size of the ground element 1402, the inductance of the feeding element 1403, the number of inductive elements 1404 and the inductance of the inductive elements 1404.

In the simulation described below, the radius of the annular radiator 1421 is 12.7mm, the radius of the disk-shaped radiator 1431 is 3mm, the radius of the ground element 402 is 15mm, the heights of the power feeding element 1403 and the inductance element 1404 are 6.5mm, the radius of the cross section of the power feeding element 1403 is 1mm, the overall width of the inductance element 1404 (serpentine trace) is 4mm, the line width is 0.5mm, the gap between traces is 0.5mm, and the width of the first gap 1411 is 0.3mm.

First, when the terminal antenna shown in fig. 14 is placed perpendicularly to the ground, the pattern in the meridian plane is substantially the same as that of fig. 6. I.e. the total polarization amount is substantially the same as the vertical polarization component. That is, the terminal antenna shown in fig. 14 is also a vertically polarized antenna.

Next, S11 and efficiency curves of the terminal antenna shown in fig. 14 are shown in fig. 15. Fig. 15 is a schematic diagram of S11 and an efficiency curve of another terminal antenna according to an embodiment of the present application. In fig. 15, a curve k is S11 of the terminal antenna, and a curve l is an efficiency curve of the terminal antenna.

As can be seen from the curve k in fig. 15, the resonance point of the terminal antenna shown in fig. 14 includes M4 and M5. That is, the terminal antenna shown in fig. 14 also includes two operation modes, an ENG zero-order mode and a disc loading mode. Wherein the ENG zero-order mode works at the M4 point, namely about 4.8 GHz. The disk loading mode operates at around M5, i.e. 6.3 GHz. And the efficiency is about-0.46 dB in the working bandwidth of the terminal antenna.

Therefore, the terminal antenna shown in fig. 14 has a wide bandwidth and high efficiency.

The terminal antenna shown in fig. 14 was verified to have two modes of operation by performing electric field distribution simulation on the terminal antenna.

The electric field distribution when the terminal antenna shown in fig. 14 operates in the ENG zero order mode is shown in fig. 16. Fig. 16 is an electric field distribution diagram of another terminal antenna according to an embodiment of the present application.

As can be seen from fig. 16, near the point M4, the electric field of the terminal antenna is uniformly distributed in constant amplitude and phase between the first radiator and the grounding element, and the direction of the electric field is basically the direction in which the grounding element is located and points to the direction in which the first radiator is located.

When the terminal antenna shown in fig. 14 is operated in the disc loading antenna mode, the electric field distribution is as shown in fig. 17. Referring to fig. 17, an electric field distribution diagram of another terminal antenna according to an embodiment of the present application is shown.

As can be seen from fig. 17, the electric field concentration of the terminal antenna is distributed near the M5 point in the open end of the element and in the gap region with a small pitch.

It can be confirmed that the terminal antenna shown in fig. 14 has two electric field distributions, i.e., two operation modes.

In addition, when the terminal antenna shown in fig. 14 is in the ENG zero order mode, the directivity pattern is basically the same as that of fig. 10, that is, the signal intensity in each direction is relatively uniform, the uniformity is relatively good, and the signal intensity in each direction is relatively strong.

When the terminal antenna shown in fig. 14 is in the disc loading mode, the directional diagram is basically the same as that of fig. 11, that is, the signal strength in each direction is relatively uniform, the uniformity is relatively good, and the signal strength in each direction is relatively strong.

Therefore, the terminal antenna shown in fig. 14 is located in a vertically polarized omni-directional antenna, and the signal coverage angle is large. In addition, the sectional height of the terminal antenna can be determined by the inductance of the feeding element, the inductance of the inductance element, and the like, which are similar to those of the terminal antenna shown in fig. 5, and will not be described herein.

As one possible design, the terminal antenna provided in the embodiment of the present application may further include a magneto-similar ring. The magnetic current ring is formed by coupling a plurality of arc-shaped metal sheets with the same length end to end. The shape of the magnetic current ring is the same as that of the first radiator, the radius of the magnetic current ring is larger than that of the first radiator, and the magnetic current ring is arranged on the plane where the first radiator is located. In addition, the center of the quasi-magnetic ring coincides with the center of the first radiator. The feed point of the quasi-magnetic current ring is arranged on one of the arc-shaped metal sheets.

In the magnetic ring, the adjacent arc-shaped metal sheets can be in interdigital coupling or overlapping coupling, and the magnetic ring is not particularly limited herein.

The terminal antenna arranged in the above manner is also a MIMO (Multiple Input Multiple Output ) antenna pair. In the embodiment of the present application, a terminal antenna formed by the first radiator, the ground element, the inductance element, the feeding element, and the like may be referred to as an ENG antenna, and an antenna formed by a magneto-rheological ring may be referred to as an MNG antenna.

It should be understood that the magneto-like loop, i.e. MNG antenna, is a horizontally polarized omni-directional antenna. Whereas the ENG antenna described in the above embodiment is a vertically polarized omni-directional antenna. Therefore, the terminal MIMO antenna formed by the MNG antenna and the ENG antenna has vertical polarization characteristic and horizontal polarization characteristic, and is a dual-polarized terminal MIMO antenna.

In addition, in the terminal MIMO antenna, the ENG antenna has two working modes of an ENG zero-order mode and a disc loading antenna mode, and the MNG antenna also has two working modes of an MNG zero-order mode and a one-time wavelength mode. The following is a description by simulation.

In the following simulation, an exploded view of the structure of the terminal antenna is shown in fig. 18. Please refer to fig. 18, which is an exploded view of another terminal antenna according to an embodiment of the present application. A first radiator 1801, a ground element 1802, a feed element 1803, six inductive elements 1804, and a magnetic-like loop 1805.

The first radiator 1801 is a circular disk, the grounding element 1802 is a circular metal disk, and the grounding element 1802 is larger in size than the first radiator 1801. The grounding element 1802 is grounded. The first radiator 1801 is disposed parallel to the grounding element 1802, and a straight line where the center of the first radiator 1801 and the center of the grounding element 1802 are located is perpendicular to a plane where the first radiator 1801 is located. The feed element 1803 is a conductive copper pillar with one end connected to the center of the first radiator 1801 and the other end connected to the center of the ground element 1802. The feeding element 1803 is used to feed the first radiator 1801. The inductive element 1804 is a serpentine trace with one end connected to the edge of the first radiator 1801 and the other end connected to the ground element 1802. The inductive elements 1804 are uniformly distributed over the edge of the first radiator 1801.

The magnetic-like fluid ring 1805 is a ring formed by coupling a plurality of arcuate metal sheets 1815 of the same length end to end. The shape of the magnetic ring 1805 is the same as the shape of the first radiator 1801, and the radius of the magnetic ring is larger than that of the first radiator 1801, and the magnetic ring is arranged on the plane where the first radiator 1801 is located. In addition, the center of the quasi-magnetic ring 1805 coincides with the center of the first radiator 1801. The feed point 1825 of the magnetic-like loop 1805 is disposed on one of the arcuate metal sheets 1815.

The resonant frequency of the terminal antenna is determined by the size of the first radiator 1801, the size of the ground element 1802, the inductance of the feed element 1803, the number of inductive elements 1804, the inductance of the inductive elements 1804, and the size of the magnetic-like loop 1805.

In addition, the radius of the first radiator 1801 is 12.7mm, the radius of the grounding element 1802 is 15mm, the height of the feeding element 1803 and the inductance element 1804 is 6.5mm, the radius of the cross section of the feeding element 1803 is 1mm, the overall width of the inductance element 1804 (serpentine trace) is 4mm, the line width is 0.5mm, and the gap between traces is 0.5mm.

The terminal antenna shown in fig. 18 has S11 and efficiency curves shown in fig. 19. Fig. 19 is a schematic diagram of S11 and an efficiency curve of another terminal antenna according to an embodiment of the present application.

In fig. 19, a curve m is S11 of an ENG antenna, a curve n is S11 of an MNG antenna, a curve p is an efficiency curve of the ENG antenna, a curve q is an efficiency curve of the MNG antenna, and a curve r is an isolation curve between the ENG antenna and the MNG antenna.

As can be seen from curve m in fig. 19, the ENG antenna has two resonance points around 5.5 GHz. That is, the ENG antenna may generate dual resonances of the zero-order mode and the higher order mode. It can be determined that the ENG antenna of the terminal antenna shown in fig. 18 has two operation modes, namely, the ENG zero-order mode and the disc loading antenna mode.

As can be seen from the curve n in fig. 19, the MNG antenna has two resonance points around 5.3GHz and around 5.8GHz, respectively. That is, MNG antennas may also produce dual resonances of the zero-order and higher order modes. It can be determined that the MNG antenna in the terminal antenna shown in fig. 18 has two operation modes, namely, MNG zero order mode and one-time wavelength mode.

As can be seen from the curve p in fig. 19, the efficiency of the ENG antenna within the operating bandwidth is about-0.08 dB, i.e., the efficiency is high.

As can be seen from the curve q in fig. 19, the efficiency of the MNG antenna in the operating bandwidth is also around-0.08 dB, and the efficiency is also higher.

As can be seen from the curve r in fig. 19, in the working bandwidths of the ENG antenna and the MNG antenna, the isolation between the ENG antenna and the MNG antenna is-39 dB, and the isolation is high.

Therefore, the terminal antenna shown in fig. 18 has an ENG zero-order mode, a disc loading antenna mode, an MNG zero-order mode, a double wavelength mode and other operation modes, and has a wide operation bandwidth and a good isolation.

The conclusion can be verified by simulation of the terminal antenna.

The electric field distribution of the ENG antenna when the ENG antenna is in the ENG zero order mode is shown in fig. 20. Referring to fig. 20, an electric field distribution diagram of another terminal antenna according to an embodiment of the present application is shown. As can be seen from fig. 20, the electric field of the ENG antenna is uniformly distributed in constant amplitude and phase between the first radiator and the ground element, and the direction of the electric field is basically the direction in which the ground element is located and points to the direction in which the ground element is located.

The electric field distribution of the ENG antenna when the ENG antenna is in the disc loading antenna mode is shown in fig. 21. Referring to fig. 21, an electric field distribution diagram of another terminal antenna according to an embodiment of the present application is shown. As can be seen from fig. 21, the electric field of the ENG antenna is concentrated between the open ends of the elements and in the region where the spacing between the elements is small.

It can be seen that the electric field distribution shown in fig. 20 is completely different from the electric field distribution shown in fig. 21.

The current vector field J profile of the MNG antenna when it is in MNG zero order mode is shown in fig. 22. Referring to fig. 22, a current vector field J profile of another terminal antenna according to an embodiment of the present application is shown. As can be seen from fig. 22, the current vector field J of the MNG antenna is distributed uniformly, and the directions of the current vector field J on the MNG antenna are the same.

And when the MNG antenna is in the one-time wavelength mode, the current vector field J distribution of the MNG antenna is shown in fig. 23. Referring to fig. 23, a current vector field J profile of another terminal antenna according to an embodiment of the present application is shown. As can be seen from fig. 23, the distribution of the current vector field J over the MNG antenna loop has inversion points.

It can be seen that the current vector field J profile shown in fig. 22 is quite different from the current vector field J profile shown in fig. 23.

Therefore, it can be determined that the terminal antenna shown in fig. 18 has various operation modes such as ENG zero-order mode, disc loading antenna mode, MNG zero-order mode, one-time wavelength mode, and the like, and the operation bandwidth is wide.

It should be understood that in the terminal antenna shown in fig. 18, the structure of the first radiator 1801 may be the same as that of the first radiator 1401 in fig. 14. That is, the feeding mode of the ENG antenna may be a coupling feeding mode as shown in fig. 14. The following is a detailed description.

Please refer to fig. 24, which is an exploded view of another terminal antenna according to an embodiment of the present application. The terminal antenna comprises a first radiator 2401, a ground element 2402, a feed element 2403, six inductive elements 2404, and a magneto-similar loop 2405.

The first radiator 2401 is a circular disk, and a circular first slit 2411 is provided. The first slit 2411 divides the first radiator 2401 into a ring-shaped radiator 2421 and a disk-shaped radiator 2431. The center of the ring-shaped radiator 2421 is the same as the center of the disk-shaped radiator 2431. The distance from the first slit 2411 to the disk-shaped radiator 2431 is smaller than the distance from the first slit 2411 to the edge of the annular radiator 2421. The width of the first slit 2411 is less than or equal to one tenth of the distance of the first slit 2411 from the center of the disk-shaped radiator 2431. The grounding element 2402 is a circular metal disc, and the size of the grounding element 2402 is larger than the first radiator 2401. The grounding element 2402 is grounded. The first radiator 2401 is disposed parallel to the grounding element 2402, and a line where the center of the first radiator 2401 and the center of the grounding element 2402 are located is perpendicular to a plane where the first radiator 2401 is located. The feeding element 2403 is a conductive copper pillar, one end of which is connected to the center of the first radiator 2401, and the other end of which is connected to the center of the ground element 2402. The feeding element 2403 is for feeding the first radiator 2401. The inductance element 2404 is a serpentine trace, one end of which is connected to the edge of the first radiator 2401, and the other end of which is connected to the ground element 2402. The inductance elements 2404 are uniformly distributed on the edge of the first radiator 2401. The magnetic-like flow rings 2405 are rings formed from a plurality of arcuate metal sheets 2415 of equal length coupled end to end. The shape of the magnetic current ring 2405 is the same as the shape of the first radiator 2401, the radius of the magnetic current ring is larger than that of the first radiator 2401, and the magnetic current ring is arranged on the plane where the first radiator 2401 is positioned. In addition, the center of the quasi-magnetic flux ring 2405 coincides with the center of the first radiator 2401. The feed point 2425 of the magnetic-like current loop 2405 is positioned on one of the arcuate metal sheets 2415. The resonant frequency of the termination antenna is determined by the dimensions of the first radiator 2401, the dimensions of the ground element 2402, the inductance of the feed element 2403, the number of inductive elements 2404, the inductance of the inductive elements 2404, and the dimensions of the magnetic loop-like 2405.

The operation principle of the terminal antenna shown in fig. 24 is similar to that of the terminal antennas shown in fig. 14 and 18, and will not be described again here. The following description through S11 shows that the terminal antenna also has the characteristics of multiple operation modes, wider broadband and better isolation. In the following description, the magneto-similar ring in fig. 24 will be referred to as an MNG antenna, and an antenna composed of other elements than the MNG antenna will be referred to as an ENG antenna.

Fig. 25 is a schematic diagram of S11 and efficiency curves of another terminal antenna according to an embodiment of the present application.

In fig. 25, a curve S is S11 of an ENG antenna, a curve t is S11 of an MNG antenna, a curve u is an efficiency curve of the ENG antenna, a curve v is an efficiency curve of the MNG antenna, and a curve w is an isolation curve between the ENG antenna and the MNG antenna.

As can be seen from curve s in fig. 25, the ENG antenna has dual resonances. Thus similar to the terminal antenna shown in fig. 18 above in fig. 14. The ENG antenna in the terminal antenna shown in fig. 24 has two operation modes of the ENG zero-order mode and the disc loading antenna mode.

As can be seen from the curve t in fig. 25, the MNG antenna also has two modes of operation, a MNG zero order mode and a doubled wavelength mode.

As can be seen from the curve u in fig. 25, the efficiency of the ENG antenna within the operating bandwidth is about-0.08 dB, i.e., the efficiency is high.

As can be seen from the curve v in fig. 25, the efficiency of the MNG antenna in the operating bandwidth is also around-0.08 dB, and the efficiency is also higher.

As can be seen from the curve w in fig. 25, in the working bandwidths of the ENG antenna and the MNG antenna, the isolation between the ENG antenna and the MNG antenna is-39 dB, and the isolation is high.

Therefore, it can be confirmed that the terminal antenna shown in fig. 24 has various operation modes, and has a wide bandwidth, high efficiency and high isolation.

In addition, in the embodiment of the present application, the shape of the first radiator may also be as shown in fig. 26. Fig. 26 is a schematic diagram of a first radiator according to an embodiment of the present application. As shown in fig. 26, the first radiator 2601 is a circular disk, and a circular first slit 2611 and a plurality of second slits 2641 along the radial direction of the first radiator 2601 are provided. The first slit 2611 divides the first radiator 2601 into a ring-shaped radiator 2621 and a disk-shaped radiator 2631. The center of the annular radiator 2621 is the same as the center of the disk-shaped radiator 2631. The distance from the first slit 2611 to the disk-shaped radiator 2631 is smaller than the distance from the first slit 2611 to the edge of the annular radiator 2621. The width of the first slit 2611 is less than or equal to one tenth of the distance of the first slit 2611 to the center of the disk-shaped radiator 2631. The second slits 2641 are uniformly distributed on the annular radiator 2621.

It should be appreciated that the second slit 2641 is along the radial direction of the first radiator 2601 and is the same as the current direction on the first radiator 2601 when the terminal antenna is operated. Therefore, the slot does not affect the electric field distribution and the current distribution of the first radiator when the terminal antenna works.

The first radiator in the terminal antenna shown in fig. 5, the terminal antenna shown in fig. 14, the terminal antenna shown in fig. 18, and the first radiator in the terminal antenna shown in fig. 24 may be replaced with the first radiator shown in fig. 26, which is not limited herein.

Based on the above description, it can be seen that the terminal antenna provided by the embodiment of the application is an omni-directional antenna with controllable profile height, wider working bandwidth and higher efficiency. In some designs, the antenna can be further expanded into an omnidirectional antenna with the characteristics of dual polarization, high isolation and the like. The method can be used for the design of built-in Wi-Fi MIMO antennas such as routers and intelligent screens.

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. A terminal antenna, comprising: the first radiator, the grounding element, the feeding element and at least one inductance element;

the first radiator is a disc which is in a regular polygon shape or a round shape; the grounding element is a metal disc with the same shape as the first radiator, and the size of the grounding element is larger than that of the first radiator; the grounding element is grounded;

the first radiator and the grounding element are arranged in parallel, and a straight line where the center of the first radiator and the center of the grounding element are located is perpendicular to a plane where the first radiator is located;

one end of the feed element is connected with the center of the first radiator, and the other end of the feed element is connected with the center of the grounding element; the feeding element is used for feeding power to the first radiator;

one end of the inductance element is connected with the edge of the first radiator, and the other end of the inductance element is connected with the grounding element; when the number of the inductance elements is a plurality of, each inductance element is uniformly distributed on the edge of the first radiator;

the resonant frequency of the terminal antenna is determined by the size of the first radiator, the size of the grounding element, the inductance of the feeding element, the number of the inductance elements and the inductance of the inductance elements;

The working frequency of the terminal antenna comprises a first resonant frequency and a second resonant frequency, and the first resonant frequency is lower than the second resonant frequency;

at the first resonant frequency, the terminal antenna works in a zero-order mode, and the electric field of the terminal antenna points to the direction of the grounding element from the direction of the first radiator;

and at the second resonant frequency, the terminal antenna works in a higher order mode, and the electric field of the terminal antenna points to the direction of the first radiator from the direction of the grounding element.

2. The terminal antenna of claim 1, wherein the first radiator is provided with a first slot having the same shape as the first radiator;

the first gap divides the first radiator into an annular radiator and a disc-shaped radiator; the center of the annular radiator is the same as the center of the disc-shaped radiator;

the distance from the first gap to the center of the disc-shaped radiator is smaller than the distance from the first gap to the edge of the annular radiator;

the width of the first gap is less than or equal to one tenth of the distance from the first gap to the center of the disc-shaped radiator.

3. The terminal antenna of claim 2, wherein the loop radiator is further provided with a plurality of second slots; the second gap is along the radial direction of the annular radiator.

4. The terminal antenna of claim 1, wherein the terminal antenna further comprises: a magneto-like ring;

the magnetic-current-like ring is formed by coupling a plurality of arc-shaped metal sheets with the same length end to end; the shape of the magnetic-current-like ring is the same as that of the first radiator; the size of the quasi-magnetic current ring is larger than that of the first radiator; the quasi-magnetic current ring is arranged on the plane where the first radiator is positioned; the center of the quasi-magnetic current ring coincides with the center of the first radiator.

5. The terminal antenna of claim 4, wherein the coupling of the arcuate metal sheets is an interdigital coupling or an overlapping coupling.

6. The terminal antenna of claim 1, wherein the first radiator and the ground element are discs; the feed element is a conductive copper column and is connected with an inner core wire of the coaxial cable; the grounding element is connected with the outer conductor of the coaxial cable; the inductance element is a serpentine wire; the number of the inductance elements is 6.

7. The terminal antenna of claim 6, wherein the radius of the first radiator is 12.7mm; the radius of the grounding element is 15mm; the heights of the feed element and the inductance element are 6.5mm; the radius of the cross section of the feed element is 1mm; the width of the inductance element is 4mm; the line width of the inductance element is 0.5mm; gaps between the inductance element wires are 0.5mm apart.

8. The terminal antenna of claim 1, wherein the larger the inductance of the inductive element, the lower the first resonant frequency of the terminal antenna; the larger the inductance of the feed element, the lower the second resonant frequency of the terminal antenna.

9. A terminal antenna according to claim 1, characterized in that said at least one inductive element comprises one or more of the following elements: serpentine wiring, lumped inductance, and wires with inductance values.

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