CN109755743B - Antenna and terminal - Google Patents
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- CN109755743B CN109755743B CN201910180026.1A CN201910180026A CN109755743B CN 109755743 B CN109755743 B CN 109755743B CN 201910180026 A CN201910180026 A CN 201910180026A CN 109755743 B CN109755743 B CN 109755743B
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Abstract
The invention provides an antenna and a terminal. The antenna includes: the antenna comprises a dielectric substrate, a grounding plate, a first antenna unit and a second antenna unit; wherein the first antenna element and the second antenna element are disposed on the dielectric substrate; the first radiator included in the first antenna unit is arranged in a first area of the dielectric substrate, and the second radiator included in the second antenna unit is arranged in a second area of the dielectric substrate; the grounding plate is arranged in a third area of the dielectric substrate; the polarization directions of the first antenna element and the second antenna element are orthogonal. The polarization directions of the two antenna units of the antenna are orthogonal, and the isolation degree is high.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to an antenna and a terminal.
Background
In recent years, Multiple Input Multiple Output (MIMO) technology has become one of the key technologies to meet the performance requirements of current mobile communication systems. However, due to the limited size of the mobile terminal, when the multi-antenna is designed, the phenomenon of strong electromagnetic coupling occurs when the antenna units are close to each other, which greatly reduces the efficiency of the antenna. Therefore, the requirement of antenna design to satisfy the requirement of low mutual coupling between antenna units as much as possible has led to extensive attention and research to find the optimal multi-antenna layout to achieve the maximum benefit of MIMO technology.
At present, in order to achieve the purpose of compact layout and enable the antenna units to have lower mutual coupling, a decoupling structure is generally required to be added after the design of the antenna units is completed; the above scheme may increase the design difficulty on one hand, and may also complicate the antenna structure on the other hand, possibly changing some original characteristics of the antenna.
Therefore, it is highly desirable for those skilled in the art to realize a MIMO antenna with higher isolation.
Disclosure of Invention
The invention provides an antenna and a terminal, and realizes a high-isolation MIMO antenna.
In a first aspect, the present invention provides an antenna comprising:
the antenna comprises a dielectric substrate, a grounding plate, a first antenna unit and a second antenna unit;
wherein the first antenna element and the second antenna element are disposed on the dielectric substrate;
the first radiator included in the first antenna unit is arranged in a first area of the dielectric substrate, and the second radiator included in the second antenna unit is arranged in a second area of the dielectric substrate; the grounding plate is arranged in a third area of the dielectric substrate;
the polarization directions of the first antenna element and the second antenna element are orthogonal.
In a second aspect, the present invention provides a terminal, comprising:
an antenna as claimed in any one of the first aspect, and a housing;
wherein the antenna is disposed in the housing.
The antenna and the terminal provided by the embodiment of the invention comprise: the antenna comprises a dielectric substrate, a grounding plate, a first antenna unit and a second antenna unit; wherein the first antenna element and the second antenna element are disposed on the dielectric substrate; the first radiator included in the first antenna unit is arranged in a first area of the dielectric substrate, and the second radiator included in the second antenna unit is arranged in a second area of the dielectric substrate; the grounding plate is arranged in a third area of the dielectric substrate; the polarization directions of the first antenna unit and the second antenna unit are orthogonal, and high isolation is achieved due to the fact that the polarization directions of the two antenna units are orthogonal.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic structural diagram of an embodiment of an antenna provided in the present invention;
figure 2 is an XY polarization pattern of a first antenna element of an embodiment of the present invention;
fig. 3 is an XY polarization pattern of a second antenna element of an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another embodiment of the antenna provided by the present invention;
fig. 5 is a schematic structural diagram of another embodiment of the antenna provided by the present invention;
fig. 6 is a schematic structural diagram of another embodiment of the antenna provided by the present invention;
fig. 7 is a schematic structural diagram of another embodiment of the antenna provided by the present invention;
FIG. 8 is a diagram illustrating simulation results according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another embodiment of the antenna provided by the present invention;
fig. 10 is a schematic structural diagram of another embodiment of an antenna provided by the present invention;
fig. 11 is a schematic diagram illustrating a comparison of reflection coefficients of antenna units according to an embodiment of the present invention;
fig. 12 is a first schematic diagram illustrating the isolation of an antenna unit according to an embodiment of the present invention;
fig. 13 is a second schematic diagram illustrating the isolation comparison of the antenna unit according to an embodiment of the present invention;
fig. 14 is a block diagram of a mobile terminal according to an embodiment of the present invention.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The terms "comprising" and "having," and any variations thereof, in the description and claims of this invention and the drawings described herein are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Firstly, the application scene related to the invention is introduced:
the antenna provided by the embodiment of the invention is applied to a terminal so as to realize the MIMO antenna with simple structure, compact layout and high isolation.
The terminal in the embodiment of the present invention may include but is not limited to: mobile terminals such as mobile phones, tablet computers, wearable devices and the like.
In the related art, in order to achieve lower mutual coupling between multiple antenna units, a decoupling structure is usually required to be added after the antenna units are designed; decoupling structures are designed for specific coupling conditions and can be considered a remedial action on antenna performance. How to select the corresponding decoupling structure according to the specific coupling condition and the antenna form is difficult, and after the decoupling structure is added, some characteristics of the original antenna may be changed accordingly; therefore, it is a challenge to design a MIMO antenna with a compact structure and layout and excellent performance without adding decoupling measures as much as possible by taking the energy coupling between the antenna elements into consideration at the beginning of the antenna design.
Therefore, in the embodiment of the invention, high isolation is realized by the orthogonal polarization directions of the first antenna unit and the second antenna unit.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 1 is a schematic structural diagram of an embodiment of an antenna provided in the present invention. As shown in fig. 1, the antenna provided in this embodiment includes:
the antenna comprises a dielectric substrate, a grounding plate, a first antenna unit and a second antenna unit;
wherein the first antenna element and the second antenna element are disposed on the dielectric substrate;
the first radiator included in the first antenna unit is arranged in a first area of the dielectric substrate, and the second radiator included in the second antenna unit is arranged in a second area of the dielectric substrate; the grounding plate is arranged in a third area of the dielectric substrate;
the polarization directions of the first antenna element and the second antenna element are orthogonal.
Specifically, the third area of the dielectric substrate is provided with a ground plate 2, and the metal strip at the edge of the dielectric substrate forms a first radiator 11 of a first antenna unit, such as the U-shaped first radiator shown in fig. 1, where the first antenna unit may be a loop antenna.
A second radiator 21 of a second antenna unit is disposed at an edge of the dielectric substrate along the first direction (Y direction in the drawing) in the second region of the dielectric substrate. The second radiator of the second Antenna unit may be a straight line in fig. 1, and the second Antenna unit is, for example, an Inverted-F Antenna (IFA).
In order to improve the isolation between the antenna elements, the polarization directions of the first antenna element and the second antenna element may be made orthogonal, for example, fig. 2 shows the XY polarization pattern of the first antenna element, the main polarization direction of the first antenna element, for example, a loop antenna, is the X direction, fig. 3 shows the XY polarization pattern of the second antenna element, and the main polarization direction of the second antenna element, for example, an IFA antenna, is the Y direction. The polarization directions of the two antenna units are orthogonal, so that the isolation is high.
The antenna of the embodiment comprises: the antenna comprises a dielectric substrate, a grounding plate, a first antenna unit and a second antenna unit; wherein the first antenna element and the second antenna element are disposed on the dielectric substrate; the first radiator included in the first antenna unit is arranged in a first area of the dielectric substrate, and the second radiator included in the second antenna unit is arranged in a second area of the dielectric substrate; the grounding plate is arranged in a third area of the dielectric substrate; the polarization directions of the first antenna unit and the second antenna unit are orthogonal, and high isolation is achieved due to the fact that the polarization directions of the two antenna units are orthogonal.
On the basis of the foregoing embodiment, further, the dielectric substrate has a first surface and a second surface that are oppositely disposed, as shown in fig. 1 and 4, the first radiator 11 is disposed in the first region along an edge of the first surface of the dielectric substrate; the first radiator 11 is in a U shape with an opening facing the center of the ground plate 2;
the second radiator 21 is arranged in the second area along the edge of the first surface of the dielectric substrate in the first direction; the interval between the first area and the second area is less than a preset threshold.
Specifically, as shown in fig. 4, the interval L between the first area and the second area is smaller than the preset threshold, so that the first antenna unit and the second antenna unit are closer to each other, and the radiation signals are easily affected by each other.
Further, the first antenna unit further includes: a first clean area 12; the first clearance area 12 is an area between the first radiator 11 and the ground plate 2; the first clearance area 12 has a U-shape opened toward the center of the ground plate 2.
Further, the second antenna unit further includes: a second clearance zone; the second clearance area penetrates through the second radiator and the ground plate along the first direction.
Specifically, the first radiator of the U-shape shown in fig. 1 and 4 has a first clearance of the U-shape between the ground plane and the first radiator. The first clearance area may be formed by hollowing out a partial area of the metal ground plate, and the first clearance area is axially symmetric in the first direction along the dielectric substrate (i.e., symmetric in the long axis direction of the dielectric substrate).
As shown in fig. 4, the second clearance area 22 may be formed by a rectangular long slit opened at a near edge of a metal plate, the long slit forming an opening. The metal strip at the edge along the first direction forms the second radiator 21 of the second antenna element.
Wherein the second clearance area may be a straight slit shape along the first direction.
Further, as shown in fig. 4, the first antenna element and the second antenna element are respectively located at two ends of the dielectric substrate in the first direction (Y direction in fig. 4).
The ground plate can be a main board of the terminal and/or a metal reinforcing plate of a display screen of the terminal.
Further, as shown in fig. 5, the second surface of the dielectric substrate is provided with a first microstrip feed line 13, a second microstrip feed line 23 and a matching network 4. The first antenna element excites the U-shaped annular metal strip (i.e. the first radiator of the first antenna element) from the first feeding point a through the matching network. The matching network may be applied in each antenna element on the dielectric substrate. Taking the antenna structure provided by the embodiment of the present invention as an example, the purpose of the present invention is to adjust the inductance and/or the capacitance in the matching network, so that the first antenna unit and the second antenna unit operate in the same frequency band. The first feed point a is inside the ground plane and feeds C on the U-shaped first radiator. The second antenna unit excites a point D of the second radiator located at the edge of the dielectric substrate from the second feeding point B.
In some embodiments of the present invention, the first feeding point a and the second feeding point B are located on the same side of the dielectric base station in the axial direction of the first direction.
Specifically, as shown in fig. 4, if the second radiator of the second antenna unit is located on the left side of the dielectric substrate, in order to achieve better isolation, the first feeding point a of the first antenna unit may be located on the left side of the dielectric substrate, that is, fed to a point C located on the left side of the dielectric substrate through the first microstrip feeder. If the second radiator of the second antenna unit is located on the right side of the dielectric substrate (as shown in fig. 7), in order to achieve better isolation, the first feeding point a of the first antenna unit may be located on the right side of the dielectric substrate, that is, the first microstrip feeder may also be located on the right side of the dielectric substrate, and is fed to the first radiator located on the right side of the dielectric substrate through the first microstrip feeder.
Wherein the first feeding point A is located at the open side of the first clearance area near the second antenna element;
the second feeding point B is located at one end of the second antenna element close to the first antenna element.
Specifically, in order to achieve better matching, the first feeding point is located at the tail end of the U-shaped first clearance area and is close to the axial direction of the dielectric substrate along the second direction, that is, the axial direction along the short side direction; the second feeding point is located at one end, far away from the short side of the metal floor, of the rectangular long seam formed in the metal floor and is also close to the axial direction of the dielectric substrate along the second direction. Although the structure and feed point of the two antennas are close to each other, the isolation between the two antennas is good because the patterns generated by the two different antenna forms (e.g., the first antenna element is a loop antenna and the second antenna element is an inverted-F antenna) are orthogonal to each other.
In some embodiments of the present invention, as shown in fig. 4 and 7, the second radiator of the second antenna unit is located on one side of the dielectric substrate in the axial direction of the first direction.
Specifically, as shown in fig. 7, the second antenna unit may be located on the right side, and the left and right sides are structurally symmetrical.
Wherein the first microstrip feed line and the second microstrip feed line may be arranged along the second direction, in some embodiments the first microstrip feed line and the second microstrip feed line are arranged in parallel. The second direction may be perpendicular to the first direction.
The matching network may be, for example, an pi-type matching network, a shunt inductor L1, a series capacitor C1, and a shunt inductor L2 to form the matching network.
As shown in fig. 5, the matching network includes: a first inductor L1, a capacitor C1, and a second inductor L2; wherein the first inductor L1 and the second inductor L2 are connected in parallel with the first microstrip feed line 13, the capacitor C1 is connected in series between the first inductor L1 and the second inductor L2.
One end of the first inductor L1 and one end of the second inductor L2 are connected to the first microstrip line 13, and the other end are connected to the ground plate.
Wherein the second microstrip feed line 23 may be connected in parallel with a third inductance L3.
In some embodiments of the present invention, to achieve better impedance matching, the second feed point B is excited by connecting a parallel third inductor L3 to a point D of the second radiator located at the edge of the dielectric substrate. One end of the third inductor L3 is connected to the second microstrip feed line, and the other end is connected to the ground plane.
As shown in fig. 6, the second side of the dielectric substrate 1 is provided with a first microstrip feed line 13 and a second microstrip feed line 23, and a feed network 4, the ground plane 2 is located on the first side of the dielectric substrate 1, and the middle part of the dielectric substrate is shown in a transparent manner in fig. 6.
In some embodiments of the invention, the length of the U-shaped first radiator of the first antenna element may correspond to one wavelength of 850 MHz. In other embodiments of the present invention, the length of the ring can be adjusted to accommodate different bandwidth requirements. For example, if a high-band antenna is to be implemented, the loop length of the first antenna element needs to be shortened.
On the basis of the above embodiment, as shown in fig. 4, the second antenna unit further includes: a variable capacitance Cp; the variable capacitor Cp is disposed in parallel at the edges of the second clearance area 22 along the first direction, and the variable capacitor Cp is used for adjusting the resonant frequency point of the second antenna unit to cover the required bandwidth.
Specifically, a variable capacitor Cp may be disposed in the rectangular slot of fig. 4, and the variable capacitor Cp is connected in parallel across the edge of the slot for matching adjustment to cover the low frequency bandwidth. The adjustable range of the variable capacitance is, for example, 0.35pF to 1.5 pF. The variable capacitance Cp may be arranged, for example, in the middle of the long slit.
The resonance length of the second antenna element is reduced due to the loading of the variable capacitance so that resonance can be generated at low frequencies without satisfying a quarter wavelength.
Fig. 1 and fig. 4 to 6 show the positional relationship of each antenna unit, and the proportional relationship of the size of each antenna unit is not limited in the embodiment of the present invention.
The performance of the antenna was analyzed by simulation as follows:
as shown in fig. 8, the S11 curve is a simulation result of the Ant1 of the first antenna element, and S11 is less than-6 dB within the frequency band of 824MHz-960MHz, so that the coverage frequency band of the first antenna element may be 824MHz-960 MHz; the dotted line S22 is a simulation result of the second antenna unit Ant2, and since the second antenna unit is an IFA antenna with a small size and a narrow bandwidth, the coverage of the 824MHz-960MHz band is achieved by changing the value of the variable capacitor Cp in a reconfigurable manner; the solid line S21 is the isolation between the first antenna element and the second antenna element, and it can be seen from the simulation results that the isolation is less than-25 dB.
The above results are merely examples, that is, simulation results under a certain size ratio of the antenna unit, and the coverage frequency band of the antenna unit may also be a high frequency band, which is not limited in the embodiment of the present invention.
Fig. 2 shows the XY polarization pattern of the first antenna element, i.e. the main polarization direction of the loop antenna, as the X direction, and fig. 3 shows the XY polarization pattern of the second antenna element, i.e. the main polarization direction of the IFA antenna, as the Y direction. The polarization directions of the two antenna units are orthogonal, so that the isolation is high.
In the antenna of this embodiment, the first antenna element and the second antenna element may be a loop antenna and an IFA antenna, respectively, and the polarization directions of the two antenna elements are orthogonal, so that the isolation is high.
On the basis of the above embodiment, optionally, the antenna of this embodiment further includes:
the third antenna unit and the second antenna unit are arranged at two ends of the dielectric substrate along a second direction; the first direction (X direction in fig. 9) is perpendicular to the second direction;
the third antenna unit and the second antenna unit have the same structure.
Specifically, in fig. 9, the left side is the second antenna unit 20, and the right side is the third antenna unit 30. The second antenna element may also be arranged on the right side and the third antenna element on the left side.
The microstrip feed line on the second side of the dielectric substrate is shown in fig. 10, and the first microstrip feed line 13 of the first antenna element in fig. 10 is arranged on the left side, and in practical application, may also be arranged on the right side.
In some embodiments of the present invention, in order to further verify the isolation between the antenna units, three antenna unit simulations are performed on the basis, and the structure is shown in fig. 9 and 10. The third antenna unit 30 has the same structure as the second antenna unit 20, and is respectively located at two sides of the ground plane. As shown in fig. 11, in the environment of three antenna elements, the reflection coefficient S11 parameter in the simulation results of the first antenna element and the second antenna element is substantially unchanged, and the curves S22-1, S22-2, S22-3, S22-4, S22-5, S22-6, S22-7, and S22-8 represent the reflection coefficient curves of the second antenna element with the variable capacitance Cp varying from 0.35, 0.50, 0.65, 0.75, 0.05, 0.95, 1.05, and 1.15pF, respectively, which are substantially the same as when only the first antenna element and the second antenna element exist; the S11 parameter of the third antenna element is substantially the same as that of the second antenna element, and curves S33-1, S33-2, S33-3, S33-4, S33-5, S33-6, S33-7, and S33-8 in fig. 11 represent the reflectance curves of the third antenna element with the variable capacitance Cp varying from 0.35, 0.50, 0.65, 0.75, 0.05, 0.95, 1.05, and 1.15pF, respectively.
As an IFA antenna, the third antenna element pattern is substantially the same as the second antenna element pattern and is also orthogonal to the first antenna element, i.e., the loop antenna pattern, so that the third antenna element and the first antenna element can also satisfy a good isolation. Curves S12-1, S12-2, S12-3, S12-4, S12-5, S12-6, S12-7 and S12-8 in FIG. 12 represent isolation curves of the first antenna element and the second antenna element with variable capacitance Cp varying from 0.35, 0.50, 0.65, 0.75, 0.05, 0.95, 1.05 and 1.15pF respectively, and the isolation is less than-21 dB. Curves S13-1, S13-2, S13-3, S13-4, S13-5, S13-6, S13-7 and S13-8 in FIG. 12 represent isolation curves of the first antenna element and the third antenna element with variable capacitance Cp varying from 0.35, 0.50, 0.65, 0.75, 0.05, 0.95, 1.05 and 1.15pF respectively, and the isolation is less than-18 dB.
Since the antenna forms of the second antenna unit and the third antenna unit are the same, the directional patterns do not present an orthogonal mode, and therefore, certain influence is exerted on each other, and curves S23-1, S23-2, S23-3, S23-4, S23-5, S23-6, S23-7, and S23-8 in fig. 13 represent the isolation curves of the second antenna unit and the third antenna unit, in which the variable capacitance Cp varies from 0.35, 0.50, 0.65, 0.75, 0.05, 0.95, 1.05, and 1.15pF, respectively, and the isolation is less than-10 dB, which can still meet the requirements of practical engineering applications.
In this embodiment, the antenna may include three antenna units, and the isolation between the antenna units is high.
In an embodiment of the present invention, a terminal is further provided, including:
an antenna as claimed in any preceding embodiment, and a housing;
wherein the antenna is disposed in the housing.
Further, the ground plate in the antenna is a main board of the terminal or a metal reinforcing plate of a display screen of the terminal.
The implementation principle and technical effect of the terminal in this embodiment are similar to those of the foregoing embodiments, and are not described herein again.
Fig. 14 is a block diagram of a mobile terminal according to an embodiment of the present invention. For example, the mobile terminal may be a smartphone, a computer, a tablet device, a wearable device, and the like.
Referring to fig. 14, the mobile terminal may further include one or more of the following components: a processing component 1402, a memory 1404, a power component 1406, a multimedia component 1408, an audio component 1410, an input/output (I/O) interface 1412, a sensor component 1414, and a communication component 1416.
The processing component 1402 generally controls the overall operation of the mobile terminal, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. Processing component 1402 may include one or more processors 1420 to execute instructions to perform all or a portion of the steps of the methods described above.
The memory 1404 is configured to store various types of data to support operation of the mobile terminal. Examples of such data include instructions for any application or method operating on the mobile terminal, contact data, phonebook data, messages, pictures, videos, and the like. The memory 1404 may be implemented by any type of volatile or non-volatile storage device or combination of devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The power supply component 1406 provides power to the various components of the mobile terminal. The power components 1406 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the mobile terminal.
The multimedia component 1408 includes a screen that provides an output interface between the mobile terminal and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 1408 includes a front-facing camera and/or a rear-facing camera. The front camera and/or the rear camera may receive external multimedia data when the mobile terminal is in an operation mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 1410 is configured to output and/or input audio signals. For example, the audio component 1410 includes a Microphone (MIC) configured to receive external audio signals when the mobile terminal is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 1404 or transmitted via the communication component 1416. In some embodiments, audio component 1410 further includes a speaker for outputting audio signals.
I/O interface 1412 provides an interface between processing component 1402 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor component 1414 includes one or more sensors for providing various aspects of state assessment for the mobile terminal. For example, the sensor component 1414 may detect an open/closed state of the mobile terminal, a relative positioning of components, such as a display and keypad of the mobile terminal, the sensor component 1414 may also detect a change in position of the mobile terminal or a component of the mobile terminal, the presence or absence of user contact with the mobile terminal, orientation or acceleration/deceleration of the mobile terminal, and a change in temperature of the mobile terminal. The sensor assembly 1414 may include a proximity sensor configured to detect the presence of a nearby object in the absence of any physical contact. The sensor assembly 1414 may also include a photosensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 1414 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 1416 is configured to facilitate wired or wireless communication between the mobile terminal and other devices. The mobile terminal may access a wireless network based on a communication standard, such as WiFi, 2G, 3G, 4G, or 5G, or a combination thereof. In an exemplary embodiment, the communication component 1416 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 1416 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (15)
1. An antenna applied to a mobile terminal, comprising:
the antenna comprises a dielectric substrate, a grounding plate, a first antenna unit and a second antenna unit;
wherein the first antenna element and the second antenna element are disposed on the dielectric substrate;
the first radiator included in the first antenna unit is arranged in a first area of the dielectric substrate, and the second radiator included in the second antenna unit is arranged in a second area of the dielectric substrate; the grounding plate is arranged in a third area of the dielectric substrate;
the second radiator is arranged in the second area along the edge of the first surface of the dielectric substrate in the first direction, and the second radiator is formed by metal strips at the edge of the dielectric substrate of the second area in the first direction;
a first feeding point used for the first antenna unit to excite the first radiator and a second feeding point used for the second antenna unit to excite the second radiator are located on the same side of the dielectric substrate in the axial direction of the first direction;
the polarization directions of the first antenna element and the second antenna element are orthogonal.
2. The antenna of claim 1,
the first radiator is arranged in the first area along the edge of the first surface of the dielectric substrate; the first radiator is in a U shape with an opening facing the center of the grounding plate;
the second radiator is arranged in the second area along the edge of the first surface of the dielectric substrate in the first direction; the interval between the first region and the second region is less than a preset threshold.
3. The antenna of claim 1 or 2, wherein the first antenna element further comprises: a first clearance zone; the first clearance area is an area between the first radiator and the ground plate; the first clearance area is U-shaped with an opening toward a center of the ground plate.
4. The antenna of claim 1 or 2, wherein the second antenna element further comprises: a second clearance zone; the second clearance area penetrates through the second radiator and the grounding plate along the first direction; the second clearance area is in a straight slit shape along the first direction.
5. The antenna of claim 3,
the first antenna element further comprises: the first microstrip feeder line is arranged on the second surface of the dielectric substrate, one end of the first microstrip feeder line is connected with the first radiator, and the other end of the first microstrip feeder line is connected with the first feed point.
6. The antenna of claim 5,
the second antenna unit further includes: the second microstrip feeder line is arranged on the second surface of the dielectric substrate; one end of the second microstrip feeder line is connected with the second radiator, and the other end of the second microstrip feeder line is connected with the second feed point.
7. The antenna of claim 5, further comprising:
a matching network;
the matching network is connected with the first microstrip feeder line, and the matching network is used for enabling the first antenna unit and the second antenna unit to work in the same frequency band.
8. The antenna of claim 4,
the second antenna unit further includes: a variable capacitance; the variable capacitor is arranged on the edges of the second clearance area along the two sides of the first direction in parallel, and the variable capacitor is used for adjusting the resonance frequency point of the second antenna unit.
9. The antenna of claim 3,
the first feeding point is positioned at the opening side of the first clearance area close to the second antenna unit;
the second feed point is located at an end of the second antenna element near the first antenna element.
10. The antenna of claim 1 or 2, wherein the second radiator of the second antenna element is located on one side of the dielectric substrate in an axial direction of the dielectric substrate in the first direction.
11. The antenna of claim 1 or 2, further comprising:
the third antenna unit and the second antenna unit are arranged at two ends of the dielectric substrate along a second direction; the first direction is perpendicular to the second direction;
the third antenna unit and the second antenna unit have the same structure.
12. The antenna of claim 7, wherein the matching network comprises: a first inductor, a capacitor and a second inductor; wherein the first and second inductors are connected in parallel with the first microstrip feed line, and the capacitor is connected in series between the first and second inductors.
13. The antenna of claim 6,
the second microstrip feeder line is connected with a third inductor in parallel.
14. A terminal, comprising:
the antenna of any one of claims 1-13, and a housing;
wherein the antenna is disposed in the housing.
15. A terminal according to claim 14, characterized in that the ground plane is a metal reinforcing plate of a main board of the terminal and/or a display screen of the terminal.
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| CN201910180026.1A CN109755743B (en) | 2019-03-11 | 2019-03-11 | Antenna and terminal |
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| CN201910180026.1A CN109755743B (en) | 2019-03-11 | 2019-03-11 | Antenna and terminal |
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| CN109755743B true CN109755743B (en) | 2021-06-01 |
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| CN110247173B (en) * | 2019-06-30 | 2021-06-15 | RealMe重庆移动通信有限公司 | Wearable equipment and intelligent wrist-watch |
| CN110398754A (en) * | 2019-07-29 | 2019-11-01 | Oppo（重庆）智能科技有限公司 | The global position system GPS antenna system and electronic equipment of electronic equipment |
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