CN109309279B - Antenna structure - Google Patents

Abstract

The invention discloses an antenna structure. The antenna structure comprises a substrate, a radiation element, a conductive element, a grounding element, a first inductor, a second inductor and a feed-in element; the radiation piece is arranged on the substrate and comprises a first radiation part, a second radiation part, a third radiation part and a feed-in part connected among the first radiation part, the second radiation part and the third radiation part; the conductive piece is arranged on the substrate and connected with the feed-in part; the grounding piece and the feed-in part are separated from each other; the first inductor is arranged on the substrate and coupled between the conductive piece and the grounding piece; the second inductor is arranged on the substrate and coupled between the conductive piece and the grounding piece; the feed-in piece is connected between the feed-in part and the grounding piece and is used for feeding in a signal. The antenna structure of the invention can cover 4G and 5G frequency bands simultaneously, and can achieve the application of multi-band.

Description

Antenna structure

Technical Field

The present invention relates to an antenna structure, and more particularly, to an antenna structure having multiple operating bands.

Background

First, as the usage rate of portable electronic devices (e.g., smart phones, tablet computers, and notebook computers) is increasing, wireless communication technology of portable electronic devices is becoming more important in recent years, and the quality of wireless communication depends on the efficiency of antennas in the portable electronic devices. Therefore, it has become important to improve the radiation efficiency of the antenna and to easily adjust the overall frequency.

In addition, with the advent of the secondary communication technology 5G LAA (received Assisted Access), the design of the conventional antenna structure (such as Planar inverted-F antenna (PIFA)) has not been able to meet the application band of the fifth generation communication system. Although an Antenna (Antenna for thin communication apparatus) suitable for thin communication devices is disclosed in the U.S. patent publication No. 8,552,912, it can achieve the characteristic of increasing the bandwidth by using the ground segments 112and 114(ground segments 112and 114). However, the fifth generation communication system has higher requirements for frequency band and bandwidth, and the US 8,552,912 patent cannot achieve the effect of covering both 4G and 5G bands.

Therefore, it is desirable to provide an antenna structure to solve the above problems.

Disclosure of Invention

The present invention is directed to provide an antenna structure capable of covering both 4G and 5G bands.

In order to solve the above technical problems, one of the technical solutions of the present invention is to provide an antenna structure, which includes a substrate, a radiation element, a conductive element, a ground element, a first inductor, a second inductor, and a feeding element; the radiation piece is arranged on the substrate and comprises a first radiation part, a second radiation part, a third radiation part and a feed-in part connected among the first radiation part, the second radiation part and the third radiation part; the conductive piece is arranged on the substrate and connected with the feed-in part; the grounding piece and the feed-in part are separated from each other; the first inductor is arranged on the substrate and coupled between the conductive piece and the grounding piece; the second inductor is arranged on the substrate and coupled between the conductive piece and the grounding piece; the feed-in piece is connected between the feed-in part and the grounding piece and is used for feeding in a signal.

One of the benefits of the present invention is that the antenna structure provided in the embodiment of the present invention can utilize the technical solutions that "the first inductor is coupled between the conductive member and the grounding member", "the second inductor is coupled between the conductive member and the grounding member", and "the feeding member is connected between the feeding portion and the grounding member for feeding a signal", so that the antenna structure can cover both 4G and 5G bands.

For a better understanding of the features and technical content of the present invention, reference should be made to the following detailed description of the invention and accompanying drawings, which are provided for purposes of illustration and description only and are not intended to limit the invention.

Drawings

Fig. 1 is a schematic top view of an antenna structure according to a first embodiment of the present invention.

Fig. 2 is a schematic connection diagram of a radiation element, a feed element and a ground element of an antenna structure according to a first embodiment of the present invention.

Fig. 3 is another schematic top view of the antenna structure according to the first embodiment of the invention.

Fig. 4 is a schematic top view of the antenna structure according to the first embodiment of the present invention.

Fig. 5 is a graph of the vswr at different frequencies for the antenna structure according to the first embodiment of the present invention.

Fig. 6 is a schematic radiation diagram of the first radiation part according to the first embodiment of the present invention.

Fig. 7 is a schematic radiation diagram of the second radiation portion according to the first embodiment of the present invention.

Fig. 8 is a schematic radiation diagram of a third radiation portion according to the first embodiment of the present invention.

Fig. 9 is a schematic top view of an antenna structure according to a second embodiment of the present invention.

Fig. 10 is a schematic top view of an antenna structure according to a third embodiment of the present invention.

Description of the main component symbols:

u antenna structure 72 ground

1 substrate 8 bridge

2 parasitic element of radiator 9

21 first radiating part 91 first parasitic part

22 second radiating portion 92 second parasitic portion

23 third radiation part E metal conductor

24 feeding part C1 first capacitor

3 conductor C2 second capacitor

31 first end F feed

32 second end portion W predetermined slit

33 body portion D1 a first predetermined distance

4 second predetermined distance of grounding piece D2

41 edge L1 a first predetermined distance

5 first inductance L2 second predetermined distance

6 second inductance M1-M6 node

7 direction of feeding element X, Y

71 feed-in terminal

Detailed Description

The following is a description of the embodiments of the present disclosure related to "antenna structure" by specific embodiments, and those skilled in the art can understand the advantages and effects of the present disclosure from the disclosure of the present disclosure. The invention is capable of other and different embodiments and its several details are capable of modification in various other respects, all without departing from the spirit and scope of the present invention. The drawings of the present invention are for illustrative purposes only and are not drawn to scale. The following embodiments will further explain the technical contents related to the present invention in detail, but the disclosure is not intended to limit the technical scope of the present invention.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various components or signals, etc., these components or signals should not be limited by these terms. These terms are used to distinguish one element from another element or from one signal to another signal. In addition, as used herein, the term "or" may include all combinations of any one or more of the associated listed items as appropriate.

[ first embodiment ]

First, referring to fig. 1, fig. 1 is a schematic top view of an antenna structure U according to a first embodiment of the present invention, which provides an antenna structure U including a substrate 1, a radiating element 2, a conductive element 3, a grounding element 4, a first inductor 5, a second inductor 6, and a feeding element 7. The radiating element 2and the conductive element 3 may be disposed on the substrate 1, and the conductive element 3 may be connected to a feeding portion 24 of the radiating element 2. In addition, the ground element 4 and the feeding element 24 of the radiating element 2 are separated from each other. Furthermore, the first inductor 5 may be disposed on the substrate 1, and the first inductor 5 may be coupled between the conductive member 3 and the grounding member 4. Meanwhile, the second inductor 6 may be disposed on the substrate 1, and the second inductor 6 may be coupled between the conductive member 3 and the grounding member 4. The feeding element 7 can be connected between the feeding element 24 and the grounding element 4, and the feeding element 7 is used for feeding a signal.

It should be noted that the substrate 1, the radiating element 2, the conductive element 3, the grounding element 4 and the feeding element 7 may be made of any conductive material, and the above components may also be made by any forming method, which is not described herein again. For example, the radiating element 2and the conductive element 3 may be a metal sheet, a metal wire or other conductive elements with conductive effect. In addition, the substrate 1 may be a Printed Circuit Board (PCB). Furthermore, the feeding element 7 can be a Coaxial cable (Coaxial cable). It should be noted that the present invention is not limited by the above examples.

In view of the above, referring to fig. 1, the radiating element 2 may be integrally formed with the conductive element 3, that is, the radiating element 2and the conductive element 3 may be a metal sheet. In addition, the grounding member 4 can be electrically connected to a metal conductor E, and the metal conductor E and the substrate 1 can be separated from each other. In other words, in the embodiment of the present invention, the radiation element 2 may include a first radiation portion 21, a second radiation portion 22, a third radiation portion 23, and a feeding portion 24 connected between the first radiation portion 21, the second radiation portion 22, and the third radiation portion 23. The first radiation part 21 and the conductive member 3 may extend toward a first direction (negative X direction) relative to the feeding part 24, and the second radiation part 22 may extend toward a second direction (positive X direction) relative to the feeding part 24, the first direction (negative X direction) and the second direction (positive X direction) being different from each other, for example, the first direction (negative X direction) and the second direction (positive X direction) are opposite to each other in the embodiment of fig. 1. In addition, the third radiation portion 23 may be disposed between the first radiation portion 21 and the second radiation portion 22, and the third radiation portion 23 overlaps with a portion of the first radiation portion 21 and a portion of the second radiation portion 22.

Referring to fig. 1 and fig. 2 together, fig. 2 is a partially enlarged schematic view of a portion II of fig. 1, for example, the feeding element 7 may be a Coaxial cable (Coaxial cable) having a feeding end 71 and a ground end 72, the feeding end 71 may be electrically connected to the feeding portion 24, and the ground end 72 may be electrically connected to the ground element 4, but the present invention is not limited to the above-mentioned example. It should be noted that, in order to make the drawings easily understandable, in other drawings, a substitute symbol is used as the structure of the coaxial cable shown in fig. 2.

In view of the above, referring to fig. 1 again, the conductive member 3 has a first end portion 31, a second end portion 32 opposite to the first end portion 31, and a body portion 33 connected between the first end portion 31 and the second end portion 32, and the first end portion 31 is connected to the feeding portion 24, so that, as shown in fig. 1, the second end portion 32 is a portion extending toward the first direction (negative X direction) opposite to the first end portion 31. In addition, a connection point between the feeding end 71 of the feeding element 7 and the conductive member 3 or a connection point between the feeding end 71 of the feeding element 7 and the feeding part 24 is defined as a feeding point F. Thereby, the feeding element 7 can be coupled to the feeding element 24 through the conductive element 3 or the feeding element 7 can be directly connected to the feeding element 24. In the first embodiment, the feeding end 71 of the feeding element 7 can be connected to the feeding portion 24 of the radiating element 2.

Further, referring to fig. 1, according to the first embodiment, one end of the first inductor 5 may be coupled to the body portion 33 of the conductive member 3, and the other end of the first inductor 5 may be coupled to the grounding member 4. In addition, one end of the second inductor 6 may be coupled to the body portion 33 of the conductive member 3, and the other end of the second inductor 6 may be coupled to the grounding member 4. Meanwhile, the first radiating portion 21 may be disposed on a first side of the feeding element 7 relative to the feeding element 7, the second radiating portion 22 may be disposed on a second side of the feeding element 7 relative to the feeding element 7, and the first inductor 5 and the second inductor 6 may be disposed on the first side. In other words, the first inductor 5 and the second inductor 6 are disposed on the same side relative to the feeding point F, but the invention is not limited thereto. Further, as shown in fig. 1, the first radiating portion 21 may be disposed on the left side of the feeding element 7, the second radiating portion 22 may be disposed on the right side of the feeding element 7, and the first inductor 5 and the second inductor 6 are both disposed on the left side of the feeding element 7. It should be noted that, in other embodiments (please refer to the third embodiment), the first inductor 5 and the second inductor 6 may be respectively disposed on two opposite sides of the feeding portion F.

Referring to fig. 3, as can be seen from a comparison between fig. 3 and fig. 1, the embodiment in fig. 3 is the most different from the embodiment in fig. 1 in that: in the antenna structure U provided in fig. 3, it is preferable that a bridge 8 is further included, the bridge 8 may be disposed on the substrate 1, and the bridge 8 may be connected between the grounding element 4 and the first inductor 5, the second inductor 6, and the feeding element 7. In other words, one end of the first inductor 5 may be coupled to the body portion 33 of the conductive member 3, and the other end of the first inductor 5 may be coupled to the bridge 8, so that the first inductor 5 is coupled to the grounding member 4 through the bridge 8. In addition, one end of the second inductor 6 may be coupled to the body portion 33 of the conductive member 3, and the other end of the second inductor 6 may be coupled to the bridge 8, so that the second inductor 6 is coupled to the grounding member 4 through the bridge 8. Furthermore, the feeding end 71 of the feeding element 7 may be coupled to the conductive member 3, and the ground end 72 of the feeding element 7 may be coupled to the bridge member 8, so that the feeding element 7 is coupled to the ground element 4 through the bridge member 8. It should be noted that other structural features shown in fig. 3 are similar to those described above with reference to fig. 1, and are not repeated herein.

In view of the above, it should be noted that, in the embodiment of fig. 3, the bridge member 8 is provided to facilitate the attachment of the grounding member 4 to the substrate 1, and although it is described in the embodiment of fig. 3 that the bridge member 8 may be further provided, in other embodiments, the bridge member 8 may not be provided. It should be noted that, for example, the material of the bridge 8 may be tin or other conductive material, and the material of the grounding element 4 may be copper or other conductive material, but the invention is not limited thereto.

Further, referring to fig. 1 and 3, a first predetermined distance L1 may be provided between the feeding point F and the second end 32, a second predetermined distance L2 may be provided between the feeding point F and an edge 41 of the ground element 4, the edge 41 of the ground element 4 extends toward the first direction (negative X direction), and the length of the first predetermined distance L1 is greater than the length of the second predetermined distance L2. In other words, the second end 32 of the conductive member 3 may protrude with respect to the edge 41 of the grounding member 4. In addition, a first predetermined distance D1 may be provided between the first inductor 5 and the feeding point F, a second predetermined distance D2 may be provided between the second inductor 6 and the feeding point F, and the first predetermined distance D1 may be smaller than the second predetermined distance D2. It should be noted that, in the embodiment of the present invention, the inductance of the first inductor 5 may be smaller than the inductance of the second inductor 6.

Referring to fig. 4, as can be seen from a comparison between fig. 4 and fig. 2, the embodiment in fig. 4 is the most different from the embodiment in fig. 3 in that: in the antenna structure U provided in fig. 4, a parasitic element 9 may be further included, the parasitic element 9 may be disposed on the substrate 1, and one end of the parasitic element 9 may be connected to the ground element 4. Furthermore, the parasitic element 9 may have a first parasitic portion 91 connected to the ground element 4 and a second parasitic portion 92 bent from the first parasitic portion 91 and extending away from the feeding portion 24, it should be noted that in other embodiments, the first parasitic portion 91 of the parasitic element 9 may be directly connected to the ground element 4. In addition, a predetermined slit W may be provided between the second parasitic part 92 of the parasitic element 9 and the second radiation part 22 (a horizontal offset distance of the second parasitic part 92 of the parasitic element 9 with respect to the second radiation part 22, i.e., a distance between the second parasitic part 92 of the parasitic element 9 and the second radiation part 22).

Next, referring to fig. 5 and the following table 1, fig. 5 is a graph illustrating a Voltage Standing Wave Ratio (VSWR) of the antenna structure according to the first embodiment of the invention at different frequencies.

TABLE 1

Node point	Frequency (MHz)	Voltage regulatorWave ratio
			M1	698	4.60
M2	960	4.34
			M3	1425	5.35
M4	2690	1.61
			M5	5150	2.02
M6	5850	2.28

Referring to fig. 4 and fig. 6 to 8, in an embodiment of the present invention, the length of the first radiation portion 21 is greater than the length of the second radiation portion 22, a frequency range (bandwidth) of a first operating frequency Band provided by the first radiation portion 21 may be between 698MHz and 960MHz, and a frequency range of a second operating frequency Band provided by the second radiation portion 22 may be between 1425MHz and 2690MHz, so as to be suitable for a 4G LTE (Long Term Evolution) Band (Band), but the present invention is not limited thereto. In addition, a third operating band may be generated by the third radiating portion 23, a portion of the first radiating portion 21 and a portion of the second radiating portion 22, and the frequency range of the third operating band may be 5150MHz to 5850MHz, so as to be suitable for the 5G WLAN (Wireless LAN) band, but the invention is not limited thereto. Incidentally, for convenience of description, the following embodiments will be described with an example in which the frequency range of the first operating band is between 698MHz and 960MHz, the frequency range of the second operating band is between 1425MHz and 2690MHz, and the frequency range of the third operating band is between 5150MHz and 5850 MHz.

Referring to fig. 4 and 6 to 8, the radiation conditions of the first radiation portion 21, the second radiation portion 22 and the third radiation portion 23 will be further described, and the mesh point blocks in fig. 6 to 8 provide the main radiation portions of the operation frequency bands. In detail, as shown in fig. 6, a first operating frequency band can be mainly generated by the feeding element 7, the first radiating portion 21, the third radiating portion 23, the conductive element 3, the second inductor 6 and the grounding element 4. In addition, as shown in fig. 7, a second operating frequency band can be mainly generated by the feeding element 7, the second radiating part 22, the third radiating part 23, the conductive element 3, the second inductor 6 and the grounding element 4. Furthermore, as shown in fig. 8, a third operating frequency band can be mainly generated by the feeding element 7, the conductive element 3, the third radiation portion 23, a portion of the first radiation portion 21 (a portion where the third radiation portion 23 overlaps the first radiation portion 21), a portion of the second radiation portion 22 (a portion where the third radiation portion 23 overlaps the second radiation portion 22), the first inductor 5, and the grounding element 4.

It is worth mentioning that the parasitic element 9 provided in the vicinity of the second radiation portion 22 of the antenna structure U may be used to enhance the characteristic of the operation band (second operation band) of the second radiation portion 22, preferably 2000MHZ to 3000MHZ, and more preferably 2600 MHZ. That is, the frequency range (bandwidth) of the high-frequency part of the operating band of the second radiation portion 22 can be increased by the provision of the parasitic element 9. Furthermore, by adjusting the horizontal offset distance of the second parasitic part 92 with respect to the second radiating part 22, the impedance value corresponding to the center frequency of the operating band generated by the second radiating part 22 can be adjusted, and further the voltage standing wave ratio value corresponding to the center frequency of the operating band can be adjusted.

In other words, the present invention can have two loops, one loop is a loop passing through the first inductor 5, and the other loop is a loop passing through the second inductor 6, and the two loops can utilize one radiating element 2and one feeding element 7 to achieve multi-band applications. It should be noted that, by adjusting the inductance of the first inductor 5, the impedance value corresponding to the center frequency of the third operating band can be adjusted. Meanwhile, by adjusting the inductance of the second inductor 6, the impedance value corresponding to the center frequency of the first operating band and the impedance value corresponding to the center frequency of the second operating band can be adjusted. Referring to fig. 3, the length of the first predetermined distance L1 is inversely proportional to the center frequency of the third operating frequency band provided by the third radiating portion 23, a portion of the first radiating portion 21, and a portion of the second radiating portion 22 in the antenna structure U. In other words, the length of the portion of the second end portion 32 protruding with respect to the edge 41 of the ground member 4 can adjust the center frequency point of the third operating frequency band. That is, the center frequency of the third operating frequency band may be made lower as the distance between the second end portion 32 and the edge 41 of the ground 4 is farther, whereas the center frequency of the third operating frequency band may be made higher as the distance between the second end portion 32 and the edge 41 of the ground 4 is closer.

[ second embodiment ]

First, referring to fig. 9, fig. 9 is a schematic top view of an antenna structure U according to a second embodiment of the present invention, and as can be seen from a comparison between fig. 9 and fig. 2, the biggest difference between the second embodiment and the first embodiment is: the antenna structure U of the second embodiment may further include a first capacitor C1 or a second capacitor C2. The first capacitor C1 may be disposed between the conductive member 3 and the grounding member 4, and the first capacitor C1 and the first inductor 5 are connected in series. In addition, the second capacitor C2 may be disposed between the conductive member 3 and the grounding member 4, and the second capacitor C2 and the second inductor 6 are connected in series. Furthermore, in other variations, one end of the first capacitor C1 or the second capacitor C2 may be connected to the conductive member 3 to be connected to the grounding member 4 through the conductive member 3.

Referring to fig. 9, although fig. 9 shows that the first capacitor C1 and the second capacitor C2 are respectively connected in series with the first inductor 5 and the second inductor 6, in other embodiments, only the first capacitor C1 or only the second capacitor C2 may be configured. Meanwhile, by the setting of the first capacitor C1 and/or the second capacitor C2, the impedance value of the first operating frequency band, the second operating frequency band, and/or the third operating frequency band can be adjusted, and in addition, the frequency range of the first operating frequency band, the second operating frequency band, and/or the third operating frequency band can also be adjusted. In addition, it should be specifically noted that other structural features shown in the second embodiment are similar to those described in the foregoing description of the first embodiment, and are not repeated herein.

[ third embodiment ]

First, referring to fig. 10, fig. 10 is a schematic top view of an antenna structure U according to a third embodiment of the present invention, and as can be seen from a comparison between fig. 10 and fig. 4, the biggest difference between the third embodiment and the first embodiment is: the first radiating portion 21 and the second inductor 6 are disposed on a first side of the feeding element 7, and the second radiating portion 22 and the first inductor 5 are disposed on a second side of the feeding element 7. In other words, the first inductor 5 and the second inductor 6 are respectively disposed on two opposite sides of the feeding portion F. That is, the first radiation part 21 and the second inductor 6 may be disposed on the left side of the feeding element 7, and the second radiation part 22 and the first inductor 5 may be disposed on the right side of the feeding element 7.

Referring to fig. 10, in detail, a feeding point F is provided between the feeding element 7 and the conductive element 3 or between the feeding element 7 and the feeding part 24, and according to the third embodiment, the feeding end 71 of the feeding element 7 can be connected to the conductive element 3. In addition, a first predetermined distance D1 exists between the first inductor 5 and the feeding point F, a second predetermined distance D2 exists between the second inductor 6 and the feeding point F, and the first predetermined distance D1 is smaller than the second predetermined distance D2. In addition, the inductance value of the first inductor 5 is smaller than the inductance value of the second inductor 6.

It should be noted that, in the third embodiment, even though the arrangement position of the first inductor 5 is different from that of the first embodiment, a first operating frequency band between 698MHz and 960MHz can be mainly generated by the feeding element 7, the first radiating part 21, the third radiating part 23, the conductive element 3, the second inductor 6 and the grounding element 4. In addition, a second operating band between 1425MHz and 2690MHz can be mainly generated by the feeding element 7, the second radiating element 22, the third radiating element 23, the conductive element 3, the second inductor and the grounding element 4. Furthermore, a third operating frequency band between 5150MHz and 5850MHz can be mainly generated by the feeding element 7, the conductive element 3, the third radiation portion 23, a portion of the first radiation portion 21 (a portion where the third radiation portion 23 overlaps the first radiation portion 21), a portion of the second radiation portion 22 (a portion where the third radiation portion 23 overlaps the second radiation portion 22), the first inductor 5, and the grounding element 4. It should be noted that other structural features shown in the third embodiment are similar to those described in the foregoing first embodiment and second embodiment, and are not repeated herein.

[ advantageous effects of the embodiments ]

One of the advantages of the present invention is that the antenna structure U provided in the embodiment of the present invention can utilize the technical solutions that the "first inductor 5 is coupled between the conductive member 3 and the grounding member 4", the "second inductor 6 is coupled between the conductive member 3 and the grounding member 4", and the "feeding member 7 is connected between the feeding part 24 and the grounding member 4 for feeding a signal", so that the antenna structure U can cover both the 4G and 5G bands. In other words, the present invention can utilize a loop through the first inductor 5 and a loop through the second inductor 6 to cooperate with a radiating element 2and a feeding element 7 to achieve multi-band applications in a single antenna structure.

The disclosure is only a preferred embodiment of the invention, and is not intended to limit the scope of the invention, so that all equivalent technical changes made by using the contents of the specification and the drawings are included in the scope of the invention.

Claims (14)

1. An antenna structure, comprising:

a substrate;

the radiation piece is arranged on the substrate and comprises a first radiation part, a second radiation part, a third radiation part and a feed-in part, wherein the third radiation part is arranged between the first radiation part and the second radiation part and is connected with the feed-in part;

a conductive member disposed on the substrate and connected to the feed-in part;

a grounding piece, wherein the grounding piece and the feed-in part are separated from each other;

the first inductor is arranged on the substrate and coupled between the conductive piece and the grounding piece;

the second inductor is arranged on the substrate, coupled between the conductive piece and the grounding piece and spaced from the first inductor; and

a feed-in element, the feed-in element is connected between the feed-in part and the grounding element, and the feed-in element is used for feeding in a signal;

a first operating frequency band is mainly generated by the feeding element, the first radiating part, the third radiating part, the conductive element, the second inductor and the grounding element, a second operating frequency band is mainly generated by the feeding element, the second radiating part, the third radiating part, the conductive element, the second inductor and the grounding element, and a third operating frequency band is mainly generated by the feeding element, the conductive element, the third radiating part, a part of the first radiating part, a part of the second radiating part, the first inductor and the grounding element.

2. The antenna structure of claim 1, wherein the first radiating portion and the conductive member extend in a first direction, the second radiating portion extends in a second direction, and the first direction and the second direction are different from each other.

3. The antenna structure of claim 1, wherein the conductive member extends in a first direction, the conductive member has a first end portion, a second end portion opposite to the first end portion, and a body portion connected between the first end portion and the second end portion, the first end portion is connected to the feeding portion, wherein a connection point between the feeding member and the conductive member or a connection point between the feeding member and the feeding portion is a feeding point, a first predetermined distance is provided between the feeding point and the second end portion, a second predetermined distance is provided between the feeding point and an edge of the ground member, and the first predetermined distance is greater than the second predetermined distance.

4. The antenna structure of claim 3, wherein the length of the first predetermined distance is inversely proportional to a center frequency of a third operating frequency band provided by the antenna structure.

5. The antenna structure according to claim 1, wherein the first radiating portion and the second inductor are disposed on a first side of the feeding element, and the second radiating portion and the first inductor are disposed on a second side of the feeding element.

6. The antenna structure according to claim 1, wherein the first radiating portion is disposed on a first side of the feeding element, the second radiating portion is disposed on a second side of the feeding element, and the first inductor and the second inductor are disposed on the first side.

7. The antenna structure of claim 1, wherein the feeding element is coupled to the feeding element through the conductive element or the feeding element is directly connected to the feeding element.

8. The antenna structure according to claim 1, wherein a feeding portion is disposed between the feeding element and the conductive element or between the feeding element and the feeding portion, wherein a first predetermined distance is disposed between the first inductor and the feeding portion, a second predetermined distance is disposed between the second inductor and the feeding portion, and the first predetermined distance is smaller than the second predetermined distance.

9. The antenna structure of claim 8, wherein the inductance of the first inductor is less than the inductance of the second inductor.

10. The antenna structure of claim 1, further comprising: the parasitic piece is arranged on the substrate and connected to the grounding piece, wherein the parasitic piece is provided with a first parasitic part connected to the grounding piece and a second parasitic part bent from the first parasitic part and extending in a direction far away from the feed-in part.

11. The antenna structure of claim 1, further comprising: and the bridging piece is arranged on the substrate, and is connected among the grounding piece, the first inductor, the second inductor and the feed-in piece.

12. The antenna structure of claim 1, further comprising: and the first capacitor is arranged between the conductive piece and the grounding piece, and the first capacitor and the first inductor are mutually connected in series.

13. The antenna structure of claim 12, further comprising: and the second capacitor is arranged between the conductive piece and the grounding piece, and the second capacitor and the second inductor are mutually connected in series.

14. The antenna structure of claim 1, wherein the first operating band has a frequency range between 698MHz and 960MHz, the second operating band has a frequency range between 1425MHz and 2690MHz, and the third operating band has a frequency range between 5150MHz and 5850 MHz.

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