CN219267889U

CN219267889U - Circularly polarized antenna and intelligent terminal

Info

Publication number: CN219267889U
Application number: CN202223425124.3U
Authority: CN
Inventors: 石县委
Original assignee: Guangdong Coros Sports Technology Co Ltd
Current assignee: Guangdong Coros Sports Technology Co Ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-06-27
Anticipated expiration: 2032-12-19

Abstract

The application is applicable to the technical field of antennas and provides a circularly polarized antenna and an intelligent terminal, wherein the circularly polarized antenna comprises an annular radiator and a first feed terminal, a first breakpoint is formed on the radiator, and a first capacitor or a first inductor is connected in series at the first breakpoint; one end of the first feed terminal is electrically connected with the radiator, and the other end of the first feed terminal is electrically connected with the first feed module of the main board. When the capacitor or the inductor is connected in series at the first breakpoint of the radiator, the resonant frequencies of the first mode and the second mode which are perpendicular to each other and excited on the radiator are changed, so that the difference value between the resonant phase of the first mode and the resonant phase of the second mode reaches 90 degrees, circular polarization is realized, and satellite positioning performance is improved.

Description

Circularly polarized antenna and intelligent terminal

Technical Field

The application belongs to the technical field of antennas, and particularly relates to a circularly polarized antenna and an intelligent terminal.

Background

With the development of intelligent terminals (e.g., mobile phones, wearable devices, computers, etc.), satellite positioning has become one of its main functions, and a satellite positioning antenna is indispensable for achieving the purposes of satellite positioning and track recording. In order to enhance the transmission efficiency of the satellite to the ground (such as enhancing the penetration capability and coverage area, etc.), the transmitting antenna of the satellite to the ground adopts a circularly polarized form, and in order to enhance the receiving capability of the positioning antenna, the receiving antenna of the terminal device should also adopt the same circularly polarized antenna as the transmitting antenna.

However, in the related art, the smart terminal is limited to a volume or an industrial design, and it is difficult to implement a circular polarized antenna, but a linear polarized antenna is generally adopted, which results in poor satellite positioning performance of the smart terminal.

Disclosure of Invention

The embodiment of the application provides a circularly polarized antenna and an intelligent terminal, which can solve the problem that the satellite positioning performance is poor due to the fact that terminal equipment uses a linearly polarized antenna.

In a first aspect, an embodiment of the present application provides a circularly polarized antenna, including:

the radiator is provided with a first breakpoint, and a first capacitor or a first inductor is connected in series at the first breakpoint; and

and one end of the first feed terminal is electrically connected with the radiator, and the other end of the first feed terminal is electrically connected with the first feed module of the main board.

In a possible implementation manner of the first aspect, a line between the first feeding terminal and the radiator center point is a first line, a line between the first breakpoint and the radiator center point is a second line, a counterclockwise surrounding direction of the radiator is a first direction, and a first included angle α is formed between the first line and the second line along the first direction;

Wherein,,

or (F)>

In one possible implementation manner of the first aspect,

or (F)>

In a possible implementation manner of the first aspect, a second breakpoint is further provided on the radiator, and a second capacitor or a second inductor is connected in series at the second breakpoint.

In a possible implementation manner of the first aspect, a line between the first feeding terminal and the radiator center point is a first line, a line between the second breakpoint and the radiator center point is a third line, a counterclockwise surrounding direction of the radiator is a first direction, and a second included angle β is formed between the first line and the third line along the first direction;

wherein,,

or (F)>

In one possible implementation manner of the first aspect,

or (F)>

In a possible implementation manner of the first aspect, the circularly polarized antenna further includes a first filter, where the first filter is configured to filter signals of a communication frequency band other than signals of a second communication frequency band, where the signals of the second communication frequency band are signals of an operation frequency band of the circularly polarized antenna formed by the first feed terminal, the radiator, and the second capacitor, or the signals of the second communication frequency band are signals of an operation frequency band of the circularly polarized antenna formed by the first feed terminal, the radiator, and the second inductor.

In a possible implementation manner of the first aspect, the first filter is connected in parallel with the first capacitor, or the first filter is connected in parallel with the first inductor.

In a possible implementation manner of the first aspect, the circularly polarized antenna further includes a second filter, where the second filter is configured to filter signals of a communication band other than the first communication band signal, where the first communication band signal is a signal of an operating band of the circularly polarized antenna formed by the first feed terminal, the radiator, and the first capacitor, or the first communication band signal is a signal of an operating band of the circularly polarized antenna formed by the first feed terminal, the radiator, and the first inductor.

In a possible implementation manner of the first aspect, the second filter is connected in parallel with the second capacitor, or the second filter is connected in parallel with the first inductor.

In a possible implementation manner of the first aspect, the circularly polarized antenna further includes a second feeding terminal, one end of the second feeding terminal is electrically connected with the radiator, and the other end of the second feeding terminal is electrically connected with a second feeding module on the motherboard.

In a second aspect, an embodiment of the present application provides an intelligent terminal, including a circularly polarized antenna according to any one of the first aspect.

Compared with the prior art, the embodiment of the application has the beneficial effects that:

the circular polarized antenna provided by the embodiment of the application comprises an annular radiator and a first feed terminal, wherein a first breakpoint is formed in the radiator, a first capacitor or a first inductor is connected in series at the first breakpoint, one end of the first feed terminal is electrically connected with the radiator, and the other end of the first feed terminal is electrically connected with a first feed module of a main board.

When the capacitor is connected in series at the first breakpoint of the radiator, the equivalent distributed inductance of the radiator is reduced due to the offset effect of the capacitor, the resonant frequency of the first mode and the resonant frequency of the second mode of the radiator are both increased, and the resonant current of the first mode of the radiator and the resonant current of the second mode of the radiator are perpendicular to each other. When the position of the first breakpoint is located in the current weak region of the first mode and is located in the current strong region of the second mode, for the first mode, the original current distribution of the radiator is changed slightly by the serially connected capacitors, and the increase amplitude of the resonant frequency of the first mode of the radiator is small. For the second mode, the original current distribution of the radiator is greatly changed by the serially connected capacitors, the increase amplitude of the resonance frequency of the second mode of the radiator is large, and the difference between the resonance phase of the first mode and the resonance phase of the second mode reaches 90 degrees by adjusting the position of the first break point and/or the capacitance value of the capacitors, so that the radiator forms a circularly polarized antenna.

When the inductor is connected in series at the first breakpoint of the radiator, the inductance value of the equivalent distributed inductor of the radiator will become larger, the resonance frequency of the first mode of the radiator and the resonance frequency of the second mode of the radiator are both reduced, and the resonance current of the first mode of the radiator and the resonance current of the second mode of the radiator are mutually perpendicular. When the position of the first breakpoint is located in the current weak region of the first mode and is located in the current strong region of the second mode, for the first mode, the original current distribution of the radiator is changed slightly by the serially connected inductor, and the reduction amplitude of the resonant frequency of the first mode of the radiator is small. For the second mode, the original current distribution of the inductor connected in series to the radiator is greatly changed, the reduction amplitude of the resonant frequency of the second mode of the radiator is large, and the difference between the resonant phase of the first mode and the resonant phase of the second mode reaches 90 degrees by adjusting the position of the first break point and/or the inductance value of the inductor, so that the radiator forms a circularly polarized antenna.

Therefore, when the capacitor or the inductor is connected in series at the first breakpoint of the radiator, the resonant frequencies of the first mode and the second mode which are perpendicular to each other and excited on the radiator are changed, so that the difference between the resonant phase of the first mode and the resonant phase of the second mode reaches 90 degrees, and circular polarization is realized.

Therefore, the circularly polarized antenna provided by the embodiment of the application only needs to use one annular radiator, so that the number of the radiators is reduced, the occupied space of the circularly polarized antenna is reduced, the miniaturized design of the intelligent terminal is facilitated, and meanwhile, the satellite positioning performance of the terminal equipment is improved.

It will be appreciated that the advantages of the second aspect may be found in the relevant description of the first aspect, and will not be described in detail herein.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of resonant frequencies of a full toroidal radiator in a first mode and a second mode according to an embodiment of the present application;

fig. 2 is a schematic perspective view of a circularly polarized antenna according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a circularly polarized antenna according to an embodiment of the present disclosure;

Fig. 4 is a schematic structural diagram of a circularly polarized antenna according to another embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a circularly polarized antenna according to another embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a circularly polarized antenna according to another embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a circularly polarized antenna according to another embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a circularly polarized antenna according to another embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a circularly polarized antenna according to another embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a circularly polarized antenna according to another embodiment of the present disclosure;

fig. 11 is a schematic structural diagram of a circularly polarized antenna according to another embodiment of the present disclosure;

fig. 12 is a schematic structural diagram of a circularly polarized antenna according to another embodiment of the present disclosure;

fig. 13 is a schematic structural diagram of a circularly polarized antenna according to another embodiment of the present application.

In the figure: 100. a radiator; 101. a current strong region; 102. a current weak region; 200. a first power supply terminal; 300. a first breakpoint; 400. a main board; 500. a second breakpoint; 600. and a second power supply terminal.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It should be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It should also be understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

As used in this specification and the appended claims, the term "if" may be interpreted in context as "when …" or "upon" or "in response to determining" or "in response to detecting". Similarly, the phrase "if a determination" or "if a [ described condition or event ] is detected" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon detection of a [ described condition or event ]" or "in response to detection of a [ described condition or event ]".

In addition, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

As shown in fig. 1, when there is no break point on the radiator 100, i.e., the radiator 100 is a complete ring, the resonant currents of the first mode (e.g., a in fig. 1) of the radiator 100 and the second mode (e.g., B in fig. 1) of the radiator 100 are perpendicular to each other, have the same amplitude, and have the same phase (i.e., the same resonant frequency), and the radiator 100 corresponds to a linearly polarized antenna.

The resonant current of the radiator 100 in the first mode is shown as a in fig. 1, where a in fig. 1 only shows the resonant current from top to bottom, and the resonant current may also be from bottom to top. The intensity of the arrow in a in fig. 1 represents the current magnitude, the area with the dense arrow is the current strong area 101, and the area outside the current strong area 101 is the current weak area 102, wherein each current weak area 102 contains a current zero point. It can be seen that the radiator 100 comprises two current strong regions 101 and two current weak regions 102 in the first mode.

The resonant current of the radiator 100 in the second mode is shown as B in fig. 1, where B in fig. 1 only shows that the resonant current is sitting right, while the resonant current may be right-down to left. The intensity of the arrows in B in fig. 1 represents the current magnitude, the area where the arrows are dense is the current strong area 101, and the area outside the current strong area 101 is the current weak area 102, wherein each current weak area 102 contains a current zero point. It can be seen that the radiator 100 comprises two current strong regions 101 and two current weak regions 102 in the second mode.

As shown in fig. 2, the circularly polarized antenna includes a ring-shaped radiator 100 and a first feeding terminal 200, wherein a first breakpoint 300 is formed on the radiator 100, the first breakpoint 300 is connected in series with a first capacitor C1 or a first inductor L1, one end of the first feeding terminal 200 is electrically connected with the radiator 100, and the other end of the first feeding terminal 200 is electrically connected with a first feeding module of the main board 400.

Specifically, the radiator 100 is disposed above the main board 400 in parallel, a certain interval is provided between the radiator 100 and the main board 400, and the distance between the radiator 100 and the main board 400 may be set according to actual requirements, for example, the distance between the radiator 100 and the main board 400 may be set to 2-5mm. The main board 400 is a main PCB (Printed Circuit Board ) of the intelligent terminal, and a processor, a corresponding feed module and the like are integrated on the main board 400. The radiator 100 is electrically connected to the main board 400 through the first power feeding terminal 200, thereby forming an antenna structure. The connection point of the first power supply terminal 200 and the radiator 100 is referred to as a power supply point, and the power supply point is provided at a position where the resonant current of the first mode and the resonant current of the second mode of the radiator 100 are close to each other. Preferably, the feed point is provided at a position where the resonant currents or electric fields of the first and second modes of the radiator 100 are equal. The length of the first breakpoint 300 may be set according to actual requirements, for example, the length of the first breakpoint 300 is set to 3-5mm, the first capacitor C1 or the first inductor L1 may be disposed on the motherboard 400, or the first capacitor C1 and the first sensor may be disposed at the first breakpoint 300.

In some embodiments, the radiator 100 may be made of a conductive material including metals, alloys, and the like.

As shown in fig. 3, when the first capacitor C1 is connected in series at the first break point 300 on the radiator 100, the equivalent distributed inductance of the radiator 100 decreases due to the cancellation effect of the capacitor, and the resonant frequency of the first mode and the resonant frequency of the second mode of the radiator 100 are both increased, wherein the resonant current of the first mode of the radiator 100 and the resonant current of the second mode of the radiator 100 are perpendicular to each other. When the first breakpoint 300 is located in the current weak region 102 of the first mode and located in the current strong region 101 of the second mode, for the first mode, the first capacitor C1 connected in series changes the original current distribution of the radiator 100 less, and the increase of the resonant frequency of the first mode of the radiator 100 is smaller. For the second mode, the original current distribution of the radiator 100 is greatly changed by the first capacitor C1 connected in series, the increase of the resonant frequency of the second mode of the radiator 100 is large, and the difference between the resonant phase of the first mode and the resonant phase of the second mode reaches 90 ° by adjusting the position of the first break point 300 and/or the capacitance value of the first capacitor C1, so that the radiator 100 forms a circularly polarized antenna.

As shown in fig. 4, when the first capacitor C1 is connected in series at the first breakpoint 300, the connection between the first feed terminal 200 and the center point of the radiator 100 is a first connection, the connection between the first breakpoint 300 and the center point of the radiator 100 is a second connection, the upper surface facing the radiator 100 is a first direction along the counterclockwise direction, and the first connection to the second connection form a first included angle a, wherein,

or (F)>

Specifically, the connection line between the first feeding terminal 200 and the center point of the radiator 100 is a first connection line, that is, the connection line between the feeding point (the contact point between the first feeding terminal 200 and the radiator 100) and the center point of the radiator 100 is a first connection line. Since the length of the first break point 300 is small, a line connecting the first break point 300 and the center point of the radiator 100 may be regarded as a second line, and preferably, a line connecting the center point of the first break point 300 and the center point of the radiator 100 may be regarded as a second line.

When (when)

When the radiator 100 is in the first mode, the first breakpoint 300 is located at the intersection area of the current weak region 102 of the first mode and the current strong region 101 of the second mode of the radiator 100, i.e. the first capacitor C1 is connected in series at the intersection area of the current weak region 102 of the first mode and the current strong region 101 of the second mode of the radiator 100. The resonance frequency of the first mode of the radiator 100 is increased by a small amplitude, and the resonance frequency of the second mode of the radiator 100 is increased by a large amplitude, so that the difference between the resonance phase of the first mode and the resonance phase of the second mode reaches 90 degrees, and a circularly polarized antenna is formed.

When (when)

When the radiator 100 is in the first mode, the first breakpoint 300 is located in the intersection area of the first mode current strong region 101 and the second mode current weak region 102 of the radiator 100, i.e. the first capacitor C1 is connected in series in the intersection area of the first mode current strong region 101 and the second mode current weak region 102 of the radiator 100. The resonance frequency of the first mode of the radiator 100 is greatly increased, the resonance frequency of the second mode of the radiator 100 is less increased, and finally, the difference between the resonance phase of the first mode and the resonance phase of the second mode reaches 90 degrees, so that the circularly polarized antenna is formed.

When (when)

When the antenna is a right-hand circularly polarized antenna; when (when)

When the circularly polarized antenna is a left-hand circularly polarized antenna. Preferably, the method comprises the steps of,

or (F)>

As shown in fig. 5, when the first inductor L1 is connected in series at the first break point 300 on the radiator 100, the inductance value of the equivalent distributed inductance of the radiator 100 will become larger, the resonant frequency of the first mode and the resonant frequency of the second mode of the radiator 100 will both be reduced, and the resonant current of the first mode of the radiator 100 and the resonant current of the second mode of the radiator 100 will be perpendicular to each other. When the first breakpoint 300 is located in the current weak region 102 of the first mode and located in the current strong region 101 of the second mode, for the first mode, the first inductance L1 connected in series changes the original current distribution of the radiator 100 less, and the reduction of the resonant frequency of the first mode of the radiator 100 is smaller. For the second mode, the original current distribution of the radiator 100 is greatly changed by the first inductor L1 connected in series, the reduction amplitude of the resonant frequency of the second mode of the radiator 100 is large, and the difference between the resonant phase of the first mode and the resonant phase of the second mode reaches 90 ° by adjusting the position of the first break point 300 and/or the inductance value of the first inductor L1, so that the radiator 100 forms a circularly polarized antenna.

As shown in fig. 6, when the first inductor L1 is connected in series at the first breakpoint 300, the connection between the first feed terminal 200 and the center point of the radiator 100 is a first connection, the connection between the first breakpoint 300 and the center point of the radiator 100 is a second connection, the upper surface facing the radiator 100 is in a first direction along the counterclockwise surrounding direction, and a first included angle α is formed between the first connection and the second connection along the first direction; wherein,,

or (F)>

When (when)

When the first breakpoint 300 is located in the intersection area of the current weak area 102 of the first mode and the current strong area 101 of the second mode of the radiator 100, that is, the first inductor L1 is connected in series in the intersection area of the current weak area 102 of the first mode and the current strong area 101 of the second mode of the radiator 100, the reduction amplitude of the resonant frequency of the first mode of the radiator 100 is smaller, the reduction amplitude of the resonant frequency of the second mode of the radiator 100 is larger, and finally, the difference value between the resonant phase of the first mode and the resonant phase of the second mode reaches 90 degrees, so as to form the circularly polarized antenna.

When (when)

When the first breakpoint 300 is located in the intersection area of the first mode current strong region 101 and the second mode current weak region 102 of the radiator 100, that is, the first inductor L1 is connected in series in the intersection area of the first mode current strong region 101 and the second mode current weak region 102 of the radiator 100, the reduction amplitude of the resonant frequency of the first mode of the radiator 100 is larger, the reduction amplitude of the resonant frequency of the second mode of the radiator 100 is smaller, and finally, the difference value between the resonant phase of the first mode and the resonant phase of the second mode reaches 90 degrees, so as to form the circularly polarized antenna.

When (when)

When the circular polarized antenna is a left-hand circular polarized antenna; when (when)

When the antenna is a right-handed circularly polarized antenna. Preferably, the method comprises the steps of,

or (F)>

In one embodiment of the present application, the radiator 100 is further provided with a second breakpoint 500, and the second breakpoint 500 is connected in series with the second capacitor C2 or the second inductor L2.

Specifically, the radiator 100 is provided with a first breakpoint 300 and a second breakpoint 500, and the first breakpoint 300 and the second breakpoint 500 can be connected in series with a capacitor or an inductor, so that the circularly polarized antenna can have the following three implementation manners.

The first implementation mode: as shown in fig. 7, the first capacitor C1 is connected in series at the first break point 300, and the second capacitor C2 is connected in series at the second break point 500. The first capacitor C1 and the second capacitor C2 may be disposed in a central symmetry of the radiator 100, or may not be disposed in a central symmetry of the radiator 100. The first break point 300 and the second break point 500 are both disposed in the intersection area of the current weak area 102 of the first mode and the current strong area 101 of the second mode of the radiator 100, that is, the first capacitor C1 and the second capacitor C2 are both connected in series in the intersection area of the current weak area 102 of the first mode and the current strong area 101 of the second mode of the radiator 100, preferably, the first break point 300 and the second break point 500 may be disposed at the position where the current of the first mode of the radiator 100 is minimum and the current of the second mode is maximum, so that the difference between the resonant phase of the first mode and the resonant phase of the second mode can reach 90 ° more easily, and the radiator 100 forms a circularly polarized antenna.

The connection line between the first power supply terminal 200 and the center point of the radiator 100 is a first connection line, the connection line between the first break point 300 and the center point of the radiator 100 is a second connection line, the connection line between the second break point 500 and the center point of the radiator 100 is a third connection line, the upper surface facing the radiator 100 is a first direction along the counterclockwise surrounding direction, a first included angle alpha is formed between the first connection line and the second connection line along the first direction,

or (F)>

The first connecting line to the third connecting line form a second included angle beta; wherein (1)>

Or (F)>

When (when)

And->

When the antenna is a right-handed circularly polarized antenna.

When (when)

And->

When the circularly polarized antenna is a left-hand circularly polarized antenna.

When (when)

And->

In this case, the first capacitor C1 forms the radiator 100 into a right-hand circularly polarized antenna, and the second capacitor C2 forms the radiator 100 into a left-hand circularly polarized antenna. If the current rotation on the first capacitor C1 traction radiator 100 forms right-hand circular polarization stronger than the current rotation on the second capacitor C2 traction radiator 100With the ability to become left-hand circularly polarized, radiator 100 ultimately forms a right-hand circularly polarized antenna. Conversely, radiator 100 ultimately forms a left-hand circularly polarized antenna.

When (when)

And->

In this case, the first capacitor C1 forms the radiator 100 into a left-hand circularly polarized antenna, and the second capacitor C2 forms the radiator 100 into a right-hand circularly polarized antenna. If the ability of the first capacitor C1 to draw the current on the radiator 100 to rotate to form the left-hand circular polarization is stronger than the ability of the second capacitor C2 to draw the current on the radiator 100 to rotate to form the right-hand circular polarization, the radiator 100 finally forms a left-hand circular polarized antenna. Conversely, radiator 100 ultimately forms a right-handed circularly polarized antenna.

In a second implementation, as shown in fig. 8, a first inductor L1 is connected in series at a first breakpoint 300, and a second inductor L2 is connected in series at a second breakpoint 500. The first inductor L1 and the second inductor L2 may be disposed in a central symmetry manner with respect to the radiator 100, or may not be disposed in a central symmetry manner with respect to the radiator 100. The first breakpoint 300 and the second breakpoint 500 are both set in the intersection area of the current weak area 102 of the first mode and the current strong area 101 of the second mode of the radiator 100, that is, the first inductor L1 and the second inductor L2 are both connected in series in the intersection area of the current weak area 102 of the first mode and the current strong area 101 of the second mode of the radiator 100, preferably, the first breakpoint 300 and the second breakpoint 500 can be set at the position where the current of the first mode of the radiator 100 is minimum and the position where the current of the second mode is maximum, so that the difference between the resonant phase of the first mode and the resonant phase of the second mode can reach 90 degrees more easily, and the radiator 100 forms a circularly polarized antenna.

The connection line between the first power supply terminal 200 and the center point of the radiator 100 is a first connection line, the connection line between the first break point 300 and the center point of the radiator 100 is a second connection line, the connection line between the second break point 500 and the center point of the radiator 100 is a third connection line, the upper surface facing the radiator 100 is a first direction along the anticlockwise surrounding direction, and the first connection line is connected to a second connection line along the first direction The connection lines form a first angle a, wherein,

or (F)>

Or (F)>

When (when)

And->

When (when)

And->

When the antenna is a right-handed circularly polarized antenna.

When (when)

And->

In this case, the first inductor L1 forms the radiator 100 into a left-hand circularly polarized antenna, and the second inductor L2 forms the radiator 100 into a right-hand circularly polarized antenna. If the first inductance L1 pulls the current on the radiator 100 to rotate to form a left-hand circular polarization, the capability is stronger than that of the first inductance L1The current on the radiator 100 is drawn by the two inductors L2 to rotate to form right-hand circular polarization, so that the radiator 100 finally forms a left-hand circular polarized antenna. Conversely, radiator 100 ultimately forms a right-handed circularly polarized antenna.

When (when)

And->

In this case, the first inductor L1 forms the radiator 100 into a right-hand circularly polarized antenna, and the second inductor L2 forms the radiator 100 into a left-hand circularly polarized antenna. If the current rotation capacity of the first inductor L1 for pulling the radiator 100 to form right-hand circular polarization is greater than the current rotation capacity of the second inductor L2 for pulling the radiator 100 to form left-hand circular polarization, the radiator 100 finally forms a right-hand circular polarization antenna. Conversely, radiator 100 ultimately forms a left-hand circularly polarized antenna.

In a third implementation, as shown in fig. 9, a first inductor L1 is connected in series at a first breakpoint 300, and a second capacitor C2 is connected in series at a second breakpoint 500. The first breakpoint 300 and the second breakpoint 500 are respectively arranged in the intersection area of the current weak area 102 of the first mode and the current strong area 101 of the second mode of the radiator 100, that is, the first inductor L1 and the second capacitor C2 are respectively connected in series in the intersection area of the current weak area 102 of the first mode and the current strong area 101 of the second mode of the radiator 100, preferably, the first breakpoint 300 and the second breakpoint 500 can be respectively arranged at the position where the current of the first mode of the radiator 100 is minimum and the position where the current of the second mode is maximum, so that the difference between the resonance phase of the first mode and the resonance phase of the second mode can reach 90 degrees more easily, and the radiator 100 forms a circularly polarized antenna.

Or (F)>

Or (F)>

When (when)

And->

When (when)

And->

When the antenna is a right-handed circularly polarized antenna.

When (when)

And->

In this case, the first inductor L1 forms the radiator 100 into a left-hand circularly polarized antenna, and the second capacitor C2 forms the radiator 100 into a right-hand circularly polarized antenna. If the current rotation on the first inductor L1 pulls the radiator 100 to form a left-hand circular polarization stronger than the current rotation on the second capacitor C2 pulls the radiator 100 to form a right-hand circular polarizationThe ability to circularly polarize, radiator 100 ultimately forms a left-hand circularly polarized antenna. Conversely, radiator 100 ultimately forms a right-handed circularly polarized antenna.

When (when)

And->

In this case, the first inductor L1 forms the radiator 100 into a right-hand circularly polarized antenna, and the second capacitor C2 forms the radiator 100 into a left-hand circularly polarized antenna. If the current rotation capacity of the first inductor L1 for pulling the radiator 100 to form right-hand circular polarization is greater than the current rotation capacity of the second capacitor C2 for pulling the radiator 100 to form left-hand circular polarization, the radiator 100 finally forms a right-hand circular polarization antenna. Conversely, radiator 100 ultimately forms a left-hand circularly polarized antenna.

In one embodiment of the present application, at least one third breakpoint is further formed on the radiator 100, and a third capacitor or a third inductor is connected in series at the third breakpoint.

Specifically, the radiator 100 includes a first breakpoint 300, a second breakpoint 500, and at least one third breakpoint, where the first breakpoint 300 may be connected in series to the first capacitor C1 or the first inductor L1, the second breakpoint 500 may be connected in series to the second capacitor C2 or the second inductor L2, and each third breakpoint may be connected in series to the third capacitor and the third inductor. The difference between the resonant phase of the first mode and the resonant phase of the second mode can reach 90 ° by adjusting the positions of the first breakpoint 300, the second breakpoint 500 and the third breakpoint on the radiator 100 and/or adjusting the capacitance value of the capacitor and the inductance value of the inductor connected in series at the breakpoints, so that the radiator 100 forms a circularly polarized antenna, and the specific design principle is please refer to the description of setting the first breakpoint 300 and the second breakpoint 500 on the radiator 100, which is not repeated herein.

As shown in fig. 10, the circularly polarized antenna further includes a first filter RC1, where the first filter RC1 is configured to filter out signals of other communication frequency bands than the signals of the second communication frequency band, where the signals of the second communication frequency band are signals of the working frequency band of the circularly polarized antenna formed by the first feed terminal 200, the radiator 100 and the second capacitor C2, or the signals of the second communication frequency band are signals of the working frequency band of the circularly polarized antenna formed by the first feed terminal 200, the radiator 100 and the second inductor L2.

Specifically, the first filter RC1 is configured to filter signals of other communication frequency bands than the second communication frequency band signal, where the second communication frequency band signal is a signal of an operating frequency band of the circularly polarized antenna formed by the first feed terminal 200, the radiator 100 and the second capacitor C2, or the second communication frequency band signal is a signal of an operating frequency band of the circularly polarized antenna formed by the first feed terminal 200, the radiator 100 and the second inductor L2.

At this time, the first communication band signal refers to a signal of an operation band of the circularly polarized antenna formed by the first power supply terminal 200, the radiator 100, the first capacitor C1 and the second capacitor C2, or the first communication band signal refers to a signal of an operation band of the circularly polarized antenna formed by the first power supply terminal 200, the radiator 100, the first capacitor C1 and the second inductor L2, or the first communication band signal refers to a signal of an operation band of the circularly polarized antenna formed by the first power supply terminal 200, the radiator 100, the first inductor L1 and the second capacitor C2, or the first communication band signal refers to a signal of an operation band of the circularly polarized antenna formed by the first power supply terminal 200, the radiator 100, the first inductor L1 and the second inductor L2.

Therefore, the second communication band signal can pass only through the circularly polarized antenna formed by the first feed terminal 200, the radiator 100 and the second capacitor C2, or the second communication band signal can pass only through the circularly polarized antenna formed by the first feed terminal 200, the radiator 100 and the second inductor L2.

The first communication band signal can only pass through the circular polarized antenna formed by the first feed terminal 200, the radiator 100, the first capacitor C1 and the second capacitor C2, or the first communication band signal can only pass through the circular polarized antenna formed by the first feed terminal 200, the radiator 100, the first capacitor C1 and the second inductor L2, or the first communication band signal can only pass through the circular polarized antenna formed by the first feed terminal 200, the radiator 100, the first inductor L1 and the second capacitor C2, or the first communication band signal can only pass through the circular polarized antenna formed by the first feed terminal 200, the radiator 100, the first inductor L1 and the second inductor L2.

Therefore, the first communication frequency band signal and the second communication frequency band signal do not interfere with each other, and the circular polarization characteristics of the first communication frequency band signal and the second communication frequency band signal can be adjusted by adjusting the capacitance value of the first capacitor C1 or the inductance value of the first inductor L1 at the first breakpoint 300 and/or adjusting the capacitance value of the second capacitor C2 or the inductance value of the second inductor L2 at the second breakpoint 500, so that the radiator 100 forms a dual-frequency circular polarization antenna.

Illustratively, the first filter RC1 is connected in parallel with the first capacitor C1 (as shown in fig. 10), or the first filter RC1 is connected in parallel with the first inductor L1 (not shown in the figure). The first filter RC1 may be a bandpass filter.

As shown in fig. 11, the circularly polarized antenna further includes a second filter RC2, where the second filter RC2 is configured to filter out signals of a communication frequency band other than the first communication frequency band signal, where the first communication frequency band signal is a signal of an operation frequency band of the circularly polarized antenna formed by the first feed terminal 200, the radiator 100 and the first capacitor C1, or the first communication frequency band signal is a signal of an operation frequency band of the circularly polarized antenna formed by the first feed terminal 200, the radiator 100 and the first inductor L1.

Specifically, the second filter RC2 is configured to filter signals of other communication frequency bands than the first communication frequency band signal, where the signal of the first communication frequency band refers to a signal of an operating frequency band of the circularly polarized antenna formed by the first feed terminal 200, the radiator 100 and the first capacitor C1, or the signal of the first communication frequency band refers to a signal of an operating frequency band of the circularly polarized antenna formed by the first feed terminal 200, the radiator 100 and the first inductor L1.

The first filter RC1 is configured to filter out signals of other communication frequency bands than the second communication frequency band signal, where the second communication frequency band signal refers to a signal of an operating frequency band of the circularly polarized antenna formed by the first feed terminal 200, the radiator 100, and the second capacitor C2, or the second communication frequency band signal refers to a signal of an operating frequency band of the circularly polarized antenna formed by the first feed terminal 200, the radiator 100, and the second inductor L2.

Accordingly, the first communication band signal can pass only through the circularly polarized antenna formed by the first feed terminal 200, the radiator 100 and the first capacitor C1, or the first communication band signal can pass only through the circularly polarized antenna formed by the first feed terminal 200, the radiator 100 and the first inductor L1. The second communication band signal can pass only through the circularly polarized antenna formed by the first feed terminal 200, the radiator 100 and the second capacitor C2, or the second communication band signal can pass only through the circularly polarized antenna formed by the first feed terminal 200, the radiator 100 and the second inductor L2.

Therefore, the signals in the first communication frequency band and the signals in the second communication frequency band do not interfere with each other, and the circular polarization characteristics of the signals in the first communication frequency band and the signals in the second communication frequency band can be adjusted by adjusting the capacitance value of the first capacitor C1 or the inductance value of the first inductor L1 at the first breakpoint 300 and/or adjusting the capacitance value of the second capacitor C2 or the inductance value of the second inductor L2 at the second breakpoint 500, so that the radiator 100 forms a dual-frequency circular polarization antenna.

The second filter RC2 is illustratively connected in parallel with the second capacitor C2 (as shown in fig. 11), or the second filter RC2 is connected in parallel with the first inductor L1 (not shown). The second filter RC2 may be a bandpass filter.

In an embodiment of the present application, the circularly polarized antenna further includes a third filter, where the third filter is configured to filter signals of other communication frequency bands than the third communication frequency band signal, the first filter is configured to filter signals of other communication frequency bands than the second communication frequency band signal, and the second filter is configured to filter signals of other communication frequency bands than the first communication frequency band signal.

At this time, the first communication band signal refers to a signal of an operation band of the circularly polarized antenna formed by the first power supply terminal 200, the radiator 100, the first inductor L1, and the third inductor, or the first communication band signal refers to a signal of an operation band of the circularly polarized antenna formed by the first power supply terminal 200, the radiator 100, the first capacitor C1, and the third capacitor, or the first communication band signal refers to a signal of an operation band of the circularly polarized antenna formed by the first power supply terminal 200, the radiator 100, the first capacitor C1, and the third inductor.

The second communication band signal refers to a signal of an operating band of the circularly polarized antenna formed by the first power supply terminal 200, the radiator 100, the second inductance L2, and the third capacitance, or the second communication band signal refers to a signal of an operating band of the circularly polarized antenna formed by the first power supply terminal 200, the radiator 100, the second inductance L2, and the third inductance, or the second communication band signal refers to a signal of an operating band of the circularly polarized antenna formed by the first power supply terminal 200, the radiator 100, the second capacitance C2, and the third capacitance, or the second communication band signal refers to a signal of an operating band of the circularly polarized antenna formed by the first power supply terminal 200, the radiator 100, the second capacitance C2, and the third inductance.

The third communication frequency band signal refers to a signal of an operating frequency band of the circularly polarized antenna formed by the first power supply terminal 200, the radiator 100, the first inductor L1 and the second inductor L2, or the third communication frequency band signal refers to a signal of an operating frequency band of the circularly polarized antenna formed by the first power supply terminal 200, the radiator 100, the first inductor L1 and the second capacitor C2, or the third communication frequency band signal refers to a signal of an operating frequency band of the circularly polarized antenna formed by the first power supply terminal 200, the radiator 100, the first capacitor C1 and the second inductor L2, or the third communication frequency band signal refers to a signal of an operating frequency band of the circularly polarized antenna formed by the first power supply terminal 200, the radiator 100, the first capacitor C1 and the second capacitor C2.

Accordingly, the first communication band signal can pass through only the circularly polarized antenna formed by the first power supply terminal 200, the radiator 100, the first inductor L1 and the third inductor, or the first communication band signal can pass through only the circularly polarized antenna formed by the first power supply terminal 200, the radiator 100, the first capacitor C1 and the third inductor.

The second communication band signal can pass through only the circularly polarized antenna formed by the first feeding terminal 200, the radiator 100, the second inductor L2 and the third inductor, or the second communication band signal can pass through only the circularly polarized antenna formed by the first feeding terminal 200, the radiator 100, the second capacitor C2 and the third inductor.

The third communication frequency band signal can only pass through the circular polarized antenna formed by the first feed terminal 200, the radiator 100, the first inductor L1 and the second inductor L2, or the third communication frequency band signal can only pass through the circular polarized antenna formed by the first feed terminal 200, the radiator 100, the first inductor L1 and the second capacitor C2, or the third communication frequency band signal can only pass through the circular polarized antenna formed by the first feed terminal 200, the radiator 100, the first capacitor C1 and the second inductor L2, or the third communication frequency band signal can only pass through the circular polarized antenna formed by the first feed terminal 200, the radiator 100, the first capacitor C1 and the second capacitor C2.

Therefore, the first communication frequency band signal, the second communication frequency band signal, and the third communication frequency band signal do not interfere with each other, and the circular polarization characteristics of the first communication frequency band signal, the second communication frequency band signal, and the third communication frequency band signal can be adjusted by adjusting the capacitance value of the first capacitor C1 or the inductance value of the first inductor L1 at the first breakpoint 300, and/or adjusting the capacitance value of the second capacitor C2 or the inductance value of the second inductor L2 at the second breakpoint 500, and/or adjusting the capacitance value of the third capacitor or the inductance value of the third inductor at the third breakpoint, so that the radiator 100 forms a three-frequency circular polarized antenna.

The third filter is illustratively connected in parallel with a third capacitance, or alternatively, the third filter is connected in parallel with a third inductance.

Similarly, more than three break points may be set on the radiator 100, and each break point is connected in series with a capacitor or an inductor, and each break point is connected in series with a filter, so that the radiator 100 may form a multi-frequency circularly polarized antenna, and the principle is the same as that described above, and will not be repeated here.

In another embodiment of the present application, the circularly polarized antenna further comprises a third filter; at this time, the first filter allows only the second communication band signal and the third communication band signal to pass; the second filter only allows the first communication frequency band signal and the third communication frequency band signal to pass through; the third filter allows only the first communication band signal and the second communication band signal to pass. The first communication frequency band signal is a signal of an operating frequency band of the circularly polarized antenna formed by the first feed terminal 200, the radiator 100 and the first inductor L1; alternatively, the first communication band signal is a signal of an operation band of the circularly polarized antenna formed by the first feed terminal 200, the radiator 100, and the first capacitor C1. The second communication frequency band signal is a signal of the working frequency band of the circularly polarized antenna formed by the first feed terminal 200, the radiator 100 and the second inductor L2; alternatively, the second communication band signal is a signal of an operating band of the circularly polarized antenna formed by the first feed terminal 200, the radiator 100, and the second capacitor C2. The third communication frequency band signal is a signal of the working frequency band of the circularly polarized antenna formed by the first feed terminal 200, the radiator 100 and the third inductor L3; alternatively, the third communication band signal is a signal of an operating band of the circularly polarized antenna formed by the first feeding terminal 200, the radiator 100 and the third capacitor C3.

In addition, a plurality of filters which are arranged in parallel in series at each of three break points of the radiator can be used for allowing signals of a plurality of frequency bands to pass through, so that the three-frequency circularly polarized antenna is realized.

Similarly, more than three break points may be set on the radiator 100, and each break point is connected in series with a capacitor or an inductor, and each break point is connected in series with at least one filter, so that the radiator 100 may form a multi-frequency circularly polarized antenna, and the principle is the same as that described above, and will not be repeated here.

As shown in fig. 12, the circularly polarized antenna further includes a second feeding terminal 600, one end of the second feeding terminal 600 is electrically connected to the radiator 100, and the other end of the second feeding terminal 600 is electrically connected to a second feeding module on the main board 400.

Specifically, when the radiator 100 is provided with the first breakpoint 300 and the second breakpoint 500, the first breakpoint 300 is connected in series with the first capacitor C1 or the first inductor L1, the second breakpoint 500 is connected in series with the second capacitor C2 or the second inductor L2, and the first filter RC1 is connected in parallel with the first capacitor C1 or the first inductor L1, the radiator 100 forms a dual-frequency circularly polarized antenna.

When the circularly polarized antenna includes the first power supply terminal 200 and the second power supply terminal 600, the first power supply module on the main board 400 connected to the first power supply terminal 200 may be a GPS module, where the first power supply module is configured to receive a GPS signal of a frequency band, and the second power supply module on the main board 400 connected to the second power supply terminal 600 may be a bluetooth module or a WiFi module, where the second power supply module is configured to receive a bluetooth or WiFi signal. Therefore, the circularly polarized antenna can realize simultaneous excitation and reception of the single-frequency GPS signal and the Bluetooth or WiFi signal.

The method for determining the position of the connection point between the second power supply terminal 600 and the radiator 100 is identical to the method for determining the position of the first power supply terminal 200, and will not be described in detail herein.

As shown in fig. 13, when the radiator 100 is provided with the first breakpoint 300 and the second breakpoint 500, the first breakpoint 300 is connected in series with the first capacitor C1 or the first inductor L1, the second breakpoint 500 is connected in series with the second capacitor C2 or the second inductor L2, the first filter RC1 is connected in parallel with the first capacitor C1 or the first inductor L1, and the second filter RC2 is connected in parallel with the second capacitor C2 or the second inductor L2, the radiator 100 forms a dual-frequency circularly polarized antenna. Since the frequency of the signal that the antenna can excite or receive is a multiple of the frequency, e.g. the antenna can excite or receive f ₀ Signals of frequency band, 2f ₀ Signal sum 3f of frequency bands ₀ Signals in the frequency band. Specifically, the frequency of the GPS signal in the L5 band is about 1.176GHZ, the frequency of the bluetooth signal or the WiFi signal is about 2.4GHZ, and the frequency of the bluetooth signal or the WiFi signal is about twice the frequency of the GPS signal in the L5 band, so that the bluetooth signal or the WiFi signal can be received simultaneously when the circularly polarized antenna can excite or receive the GPS signal in the L5 band.

When the circularly polarized antenna includes the first power supply terminal 200 and the second power supply terminal 600, the first power supply module on the main board 400 connected to the first power supply terminal 200 may be a GPS module, where the first power supply module is configured to receive GPS signals, and the second power supply module on the main board 400 connected to the second power supply terminal 600 may be a bluetooth module or a WiFi module, where the second power supply module is configured to receive bluetooth or WiFi signals. Therefore, the circularly polarized antenna can realize simultaneous excitation and reception of the dual-frequency GPS signal and the Bluetooth or WiFi signal.

The application also discloses an intelligent terminal, including above-mentioned circular polarized antenna, because above-mentioned circular polarized antenna only uses an annular radiator, reduced the occupation space of antenna, consequently, this intelligent terminal is favorable to realizing miniaturized design more.

The intelligent terminal of this application can be cell-phone, dull and stereotyped and intelligent wearing equipment, and intelligent wearing equipment can be intelligent wrist-watch, intelligent bracelet, intelligent earphone or intelligent glasses etc..

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims

1. A circularly polarized antenna, comprising:

2. The circularly polarized antenna of claim 1, wherein the first feed terminal is connected to the radiator center point by a first connection, the first break point is connected to the radiator center point by a second connection, the counterclockwise direction of the radiator is a first direction, and a first angle α is formed between the first connection and the second connection along the first direction;

wherein,,

or (F)>

3. A circularly polarized antenna as claimed in claim 2, wherein,

or (F)>

4. The circularly polarized antenna of claim 2, wherein the radiator is further provided with a second breakpoint, and the second breakpoint is connected in series with a second capacitor or a second inductor.

5. The circularly polarized antenna of claim 4, wherein the first feed terminal is connected to the radiator center point by a first connection, the second break point is connected to the radiator center point by a third connection, the counterclockwise direction of the radiator is a first direction, and the first connection to the third connection form a second angle β along the first direction;

Wherein,,

or (F)>

6. The circularly polarized antenna of claim 5, wherein,

or (F)>

7. The circularly polarized antenna according to any one of claims 4-6, further comprising a first filter, where the first filter is configured to filter signals of a communication frequency band other than signals of a second communication frequency band, where the signals of the second communication frequency band are signals of an operating frequency band of the circularly polarized antenna formed by the first feed terminal, the radiator, and the second capacitor, or signals of a second communication frequency band are signals of an operating frequency band of the circularly polarized antenna formed by the first feed terminal, the radiator, and the second inductor.

8. The circularly polarized antenna of claim 7, wherein the first filter is in parallel with the first capacitance or the first filter is in parallel with the first inductance.

9. The circularly polarized antenna of claim 7, further comprising a second filter, wherein the second filter is configured to filter signals of a communication band other than the first communication band signal, the first communication band signal being a signal of an operating band of the circularly polarized antenna formed by the first feed terminal, the radiator, and the first capacitor, or the first communication band signal being a signal of an operating band of the circularly polarized antenna formed by the first feed terminal, the radiator, and the first inductor.

10. The circularly polarized antenna of claim 9, wherein the second filter is in parallel with the second capacitance or the second filter is in parallel with the first inductance.

11. The circularly polarized antenna of claim 7 further comprising a second feed terminal having one end electrically connected to the radiator and the other end electrically connected to a second feed module on the motherboard.

12. The circularly polarized antenna of claim 9 further comprising a second feed terminal having one end electrically connected to the radiator and the other end electrically connected to a second feed module on the motherboard.

13. An intelligent terminal comprising the circularly polarized antenna of any one of claims 1-12.