CN111864370A

CN111864370A - Antenna structure

Info

Publication number: CN111864370A
Application number: CN202010790375.8A
Authority: CN
Inventors: 张亚斌
Original assignee: Changzhou Ctw Electronics Co ltd
Current assignee: Changzhou Ctw Electronics Co ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2020-10-30
Anticipated expiration: 2040-08-07
Also published as: CN111864370B

Abstract

The application provides an antenna structure, antenna structure include the base plate and set up low frequency radiation portion, high frequency radiation portion, feed-in portion and ground connection portion on the base plate, wherein: the low-frequency radiation part comprises a first low-frequency radiation arm and a second low-frequency radiation arm, and the first low-frequency radiation arm and the second low-frequency radiation arm form a first opening; the high-frequency radiation part comprises a high-frequency radiation unit and a high-frequency radiation arm, the high-frequency radiation unit is provided with an upper side edge and a lower side edge which are opposite, and a left side edge and a right side edge which are opposite, the upper side edge of the high-frequency radiation unit extends into the first opening, the lower side edge of the high-frequency radiation unit is connected to the feed-in part, the right side edge of the high-frequency radiation unit is connected to the grounding part, and the high-frequency radiation arm is connected to the first low; the feed-in part is used for connecting to a feed-in source; the grounding part is grounded through the grounding surface of the substrate. The length of the low-frequency radiation part is reduced by the shape of the opening, and the high-frequency radiation unit extends into the opening to reduce the occupied space in the length direction of the high-frequency radiation unit, so that the structure is compact, and the space of the substrate is fully utilized.

Description

Antenna structure

Technical Field

The application relates to the technical field of antennas, in particular to an antenna structure.

Background

An antenna is a device for transmitting or receiving radio waves and is widely used in systems such as broadcasting and television, point-to-point radio communication, radar, space exploration and the like.

The existing multiband antenna design is usually based on a planar inverted-F antenna, and the size of a plurality of radiation parts is increased or decreased along the length direction or perpendicular to the length direction, or a plurality of radiation arms are added, so as to realize the multiband coverage. In order to ensure the isolation between the plurality of radiation parts and reduce the mutual interference between the plurality of radiation parts, the antenna is mostly realized by increasing the size of the antenna and occupying more space, so that the antenna structure is not compact enough, and the space of the substrate is not fully utilized.

Disclosure of Invention

The application aims to provide an antenna structure, and solves the problems that a multi-band antenna structure in the prior art is not compact enough and cannot fully utilize the space of a substrate.

The purpose of the application is realized by adopting the following technical scheme:

in a first aspect, the present application provides an antenna structure, which includes a substrate, and a low-frequency radiation portion, a high-frequency radiation portion, a feed-in portion, and a ground portion disposed on the substrate, wherein: the low-frequency radiation part comprises a first low-frequency radiation arm and a second low-frequency radiation arm, and the first low-frequency radiation arm and the second low-frequency radiation arm form a first opening; the high-frequency radiation part comprises a high-frequency radiation unit and a high-frequency radiation arm, the high-frequency radiation unit is provided with an upper side edge and a lower side edge which are opposite, and a left side edge and a right side edge which are opposite, the upper side edge of the high-frequency radiation unit extends into the first opening, the lower side edge of the high-frequency radiation unit is connected to the feed-in part, the right side edge of the high-frequency radiation unit is connected to the grounding part, and the high-frequency radiation arm is connected to the first low-frequency radiation arm; the feed-in part is used for connecting to a feed-in source; the grounding part is grounded through the grounding surface of the substrate. This technical scheme's beneficial effect lies in, with the length of low frequency radiation portion design for open-ended shape in order to reduce low frequency radiation portion, set up high frequency radiation unit into stretching into in the opening in order to reduce the space that high frequency radiation portion occupy on self length direction, make antenna structure compacter under the prerequisite of guaranteeing the isolation, make full use of base plate space.

In some alternative implementations, the first low frequency radiating arm and the second low frequency radiating arm form a flared first opening. In order to ensure the isolation between the high-frequency radiation unit and the two low-frequency radiation arms, a certain distance needs to be kept between the high-frequency radiation unit and the two low-frequency radiation arms.

In some optional implementations, the low-frequency radiating part further includes a third low-frequency radiating arm disposed between the first low-frequency radiating arm and the second low-frequency radiating arm and respectively connecting the first low-frequency radiating arm and the second low-frequency radiating arm, and the third low-frequency radiating arm is provided with a first concave portion having a concave direction facing the ground plane. The resonant frequency of the third low-frequency radiating arm can be adjusted by increasing or reducing the length of the third low-frequency radiating arm, and the technical scheme has the advantages that the length of the third low-frequency radiating arm is increased, so that the third low-frequency radiating arm can receive radio waves of a lower frequency band, and the working frequency band is wider.

In some optional implementations, the first concave portion has a bottom surface parallel to the ground plane, and two side surfaces perpendicular to and opposite to the bottom surface, respectively. The technical scheme has the beneficial effects of simple process and easiness in implementation.

In some optional implementations, the high-frequency radiating arm is provided with a convex portion approximately parallel to the first low-frequency radiating arm and protruding away from the ground plane. The technical scheme has the beneficial effects that resonance is generated on the high-frequency radiation arm, and the bandwidth of the working frequency band of the high-frequency radiation arm is increased.

In some optional implementations, the lower side of the high-frequency radiating element has a connection point with the feeding part, and the connection point is close to the ground plane; the contour of the lower side of the high-frequency radiating element has a tendency to move away from the ground plane as it extends from the connection point to the periphery. If the lower side of the high-frequency radiating unit is designed to be parallel to the ground plane, the high-frequency radiating unit is close to the ground, and the influence on the impedance is large.

In some optional implementations, a portion of the lower side of the high-frequency radiating unit, which is close to the ground portion, is provided with a second concave portion having a concave direction away from the ground plane. The technical scheme has the beneficial effects that the resonance frequency of the high-frequency radiation unit is adjusted, so that the impedance is correspondingly changed, and the impedance matching is realized.

In some optional implementations, a right side of the high-frequency radiating unit forms a second opening with the ground portion, the second opening being approximately U-shaped and away from the ground plane. The technical scheme has the advantages that the coupling capacitance is increased or reduced by controlling the distance between the high-frequency radiation unit and the grounding part and the ground, so that the impedance of the antenna is convenient to adjust.

In some optional implementations, the ground portion forms a third opening that is approximately U-shaped and is proximate to the ground plane. The technical scheme has the beneficial effects that the antenna impedance can be conveniently adjusted by controlling the length of the grounding part.

In some alternative implementations, a portion of the ground portion that is further from the ground plane has a greater width than a portion that is closer to the ground plane. The technical scheme has the beneficial effects that the size of distributed parallel inductance can be adjusted by controlling the width of the grounding part, so that the impedance of the antenna is adjusted.

Drawings

The present application is further described below with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of a vehicle-mounted antenna provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a vehicle-mounted antenna provided in an embodiment of the present application;

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

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

fig. 5 is a partial schematic structural diagram of a right side of an antenna structure showing a high-frequency radiation unit according to an embodiment of the present application;

fig. 6 is a schematic partial structure diagram of a display ground portion of an antenna structure according to an embodiment of the present application;

fig. 7 is a graph illustrating a result of an isolation test between a first 5G antenna and a second 5G antenna according to an embodiment of the present application.

Detailed Description

The present application is further described with reference to the accompanying drawings and the detailed description, and it should be noted that, in the present application, the embodiments or technical features described below may be arbitrarily combined to form a new embodiment without conflict.

Referring to fig. 1 and 2, the present application provides a vehicle antenna including a shark fin housing 300 and an antenna device disposed inside the shark fin housing 300. The shark fin housing 300 is simple and fashionable in appearance and popular with consumers and manufacturers, and the shark fin-shaped vehicle-mounted antenna is unfolded around the shark fin.

The antenna device comprises a first main board 100, a first 5G antenna 101 to a fourth 5G antenna 104. The first main board 100 has opposite first and second sides 111 and 112, opposite third and

fourth sides

113 and 114, and a first line 115 connecting the third and

fourth sides

113 and 114, the first main board 100 preferably has a regular shape, and the first line 115 is preferably a central axis of the first main board 100. The first main board 100 is a PCB, i.e., a Printed circuit board, which is also called a Printed circuit board, and is a support for electronic components and a carrier for electrical connection of the electronic components. The first main plate 100 is, for example, a long strip, the end where the third side 113 is located is narrower, the end where the fourth side 114 is located is wider, and the outer contour of the first main plate 100 on the third side 113 may be an arc shape, and in a specific implementation, may be a semicircle.

The first 5G antenna 101 to the fourth 5G antenna 104 are sequentially disposed on the upper surface of the first main board 100 along the first connection line 115, the first 5G antenna 101 is close to the fourth side 114, and the fourth 5G antenna 104 is close to the third side 113. Wherein the first 5G antenna 101 is perpendicular or approximately perpendicular to the first connection line 115; the second 5G antenna 102 to the fourth 5G antenna 104 are located in a first plane perpendicular or approximately perpendicular to the upper surface of the first main board 100 and coinciding or approximately coinciding with the first connection line 115. The first 5G antenna 101 is located in a plane perpendicular to the first plane. The heights of the first 5G antenna 101 to the fourth 5G antenna 104 are sequentially reduced by the top curve of the shark fin housing 300.

Four 5G antennas set gradually along the first connecting line 115 of first mainboard 100, set up first 5G antenna 101 as perpendicular to or the first connecting line 115 of approximate perpendicular to, set up other three 5G antennas in or the approximate setting in the first plane, make putting of first 5G antenna 101 utilize the terminal great space of shark fin ingeniously, other three 5G antennas set gradually along the top curve of shark fin and effectively utilize the casing inner space, such layout has increased the isolation between the antenna, and compact structure, overall layout is more reasonable.

In some alternative implementations, two full-band 5G antennas are used to simultaneously receive 2G, 3G, 4G, and 5G bands of radio waves, and two 4G-compatible 5G antennas are used to simultaneously receive 4G and 5G bands of radio waves. Specifically, the first 5G antenna 101 and the second 5G antenna 102 may be full band antennas, and the third 5G antenna 103 and the fourth 5G antenna 104 may be compatible with a 4G frequency band. Such selection is the result of repeated demonstration and practice of the inventor, and the inventor finds that the shark fin antenna can accommodate two full-band 5G antennas and two 4G-compatible 5G antennas at most on the premise that the size is not greatly increased in design and application, and if the shark fin antenna is designed into three full-band 5G antennas or four full-band 5G antennas, the isolation between the antennas cannot be ensured, so that the performance of the shark fin antenna is affected.

The first 5G antenna 101 and/or the second 5G antenna 102 may be a multiband antenna employing the following antenna structure. Referring to fig. 3 to 6, the present embodiment further provides an antenna structure, where the antenna structure includes a substrate 50, and a low-frequency radiation part 10, a high-frequency radiation part 20, a feed-in part 30, and a ground part 40 disposed on the substrate 50. The feeding unit 30 is used for connecting to a feeding source. The ground portion 40 is grounded through a ground plane 51 of the substrate 50. The shape of the substrate 50 of the present embodiment is formed by splicing a rectangle and a trapezoid, and in other embodiments, the shape of the substrate 50 may also be a triangle, a rectangle, a triangle excluding at least one vertex, a rectangle excluding at least one vertex, or other shapes. The operating frequency band of the low-frequency radiating portion 10 is at least one of 4G, 3G and 2G, for example, and the operating frequency band of the high-frequency radiating portion 20 is 5G, for example, and the antenna structure may be a multiband antenna or a full-band antenna.

Referring to fig. 4, the low frequency radiating portion 10 includes a first low frequency radiating arm 11 and a second low frequency radiating arm 12, and the low frequency radiating portion 10 may further include a third low frequency radiating arm 13 disposed between the first low frequency radiating arm 11 and the second low frequency radiating arm 12 and respectively connected to the first low frequency radiating arm 11 and the second low frequency radiating arm 12.

The first low frequency radiating arm 11 and the second low frequency radiating arm 12 form a first opening 61. The first low-frequency radiating arm 11 and the second low-frequency radiating arm 12 are, for example, long strips, and the second low-frequency radiating arm 12 extends in a direction close to the ground plane 51 and in a direction away from the first low-frequency radiating arm 11. The second low frequency radiating arm 12 has a free end 121, the free end 121 being contoured, for example, in a straight line, a broken line or an arc. The extending direction of the ground plane from left to right is taken as a first direction, an included angle formed by the extending direction of the first low-frequency radiating arm 11 from left to right and the first direction may be an acute angle, and an included angle formed by the extending direction of the second low-frequency radiating arm 12 from bottom to top and the first direction may be an obtuse angle.

The low frequency radiating portion 10 is designed in an open shape to reduce the length of the low frequency radiating portion 10, and in order to ensure the isolation between the high frequency radiating element 21 and the two low frequency radiating arms, a certain distance needs to be kept between the high frequency radiating element 21 and the two low

frequency radiating arms

11 and 12. In some alternative implementations, the first low-frequency radiating arm 11 and the second low-frequency radiating arm 12 may form a flared first opening 61. Compared with the U-shaped opening and the opening with other shapes, the design of the outward-expanding opening enables a larger space to be reserved between the two low-

frequency radiating arms

11 and 12, and the high-frequency radiating unit 21 with a larger size can be accommodated, so that the high-frequency radiating unit 21 can receive radio waves with a lower frequency band, and the working frequency band is wider.

With continued reference to fig. 4, the third low-frequency radiating arm 13 may be provided with a first recess 131 having a concave direction towards the ground plane 51. The resonant frequency of the third low-frequency radiating arm 13 can be adjusted by increasing or decreasing the length of the third low-frequency radiating arm 13, thereby increasing the length of the third low-frequency radiating arm 13, so that it can receive radio waves of a lower frequency band and the operating frequency band is wider. In a specific implementation, the first concave portion 131 may have a bottom surface parallel to the ground plane 51, and two side surfaces perpendicular to and opposite to the bottom surface. Compared with a sawtooth-shaped plane or a curved plane, the structure is simple in manufacturing process and easy to realize.

In practical applications, the portion of the first low-frequency radiating arm 11 connected to the third low-frequency radiating arm 13 may have a side surface parallel to the side surface of the first concave portion 131; the portion of the second low-frequency radiating arm 12 connected to the third low-frequency radiating arm 13 may have a side surface parallel to the side surface of the first concave portion 131. Thereby, the two low frequency radiating arms can be dimensioned to receive low frequency radio waves.

With continued reference to fig. 4, the high-frequency radiation section 20 includes a high-frequency radiation unit 21 and a high-frequency radiation arm 22.

The high-frequency radiating unit 21 has opposite upper and lower sides, and opposite left and right sides. The upper side 211 of the high-frequency radiating unit 21 extends into the first opening 61, the lower side 212 of the high-frequency radiating unit 21 is connected to the feeding portion 30, and the right side 213 of the high-frequency radiating unit 21 is connected to the grounding portion 40. The high-frequency radiation unit 21 is arranged to extend into the opening to reduce the space occupied by the high-frequency radiation part 20 in the length direction of the high-frequency radiation part, so that the antenna structure is more compact on the premise of ensuring the isolation degree, and the space of the substrate 50 is fully utilized.

The high-frequency radiation unit 21 has a shape in which the upper side 211 is narrow and the lower side 212 is wide, for example, the projection of the contour of the left side 214 on the plane shown in the drawing is a straight line, for example, and the projection of the contour of the right side 213 on the plane shown in the drawing is a broken line, for example. In a specific implementation, referring to fig. 5, the right side 213 includes, for example, a first segment 2131 to a fourth segment 2134 connected in sequence, and included angles a1 to a4 formed by the extending directions of the first segment 2131 to the fourth segment 2134 from top to bottom and the first direction are gradually increased, wherein included angles a1 to a3 formed by the extending directions of the first segment 2131 to the third segment 2133 from top to bottom and the first direction may be acute angles, and an included angle a4 formed by the extending directions of the fourth segment 2134 from top to bottom and the first direction may be obtuse angles. Thereby, the high-frequency radiation unit 21 is made to have a suitable size to receive radio high-frequency waves.

If the lower side 212 of the high-frequency radiating element 21 is designed to be parallel to the ground plane 51, the high-frequency radiating element 21 is close to the ground and has a large influence on the impedance, and in some alternative implementations, the high-frequency radiating element 21 may be designed to be far from the ground plane 51 when extending from the connection point to the periphery, so that the distance between the high-frequency radiating element 21 and the ground is increased and the influence on the impedance is reduced. Specifically, with continued reference to fig. 4, the lower side 212 of the high-frequency radiating element 21 may have a connection point with the feeding part 30, the connection point being close to the ground plane 51; the lower side 212 of the high-frequency radiating element 21 has a contour that tends to be away from the ground plane 51 as it extends from the connection point to the periphery.

In some alternative implementations, a portion of the lower side 212 of the high-frequency radiating unit 21 close to the ground portion 40 may be provided with a second recess 2121 recessed in a direction away from the ground plane 51. In a specific implementation, the profile of the second recess 2121 may be a polygonal line or an arc, and by providing the second recess 2121, the resonant frequency of the high-frequency radiating unit 21 may be adjusted, so that the impedance is changed accordingly, and the impedance matching is achieved.

With continued reference to fig. 4, the high frequency radiating arm 22 is connected to the first low frequency radiating arm 11, wherein the first low frequency radiating arm 11 has an upper end and a lower end opposite to each other, the upper end of the first low frequency radiating arm 11 is connected to the third low frequency radiating arm 13, and the lower end of the first low frequency radiating arm 11 is connected to the high frequency radiating arm 22. In some alternative implementations, the high-frequency radiating arm 22 may be provided with a convex portion 221 approximately parallel to the first low-frequency radiating arm 11 and protruding away from the ground plane 51, the convex portion 221 is provided at a connection with the first low-frequency radiating arm 11 adjacent to the high-frequency radiating arm 22, and by providing the convex portion 221, resonance may be generated in the high-frequency radiating arm 22, so as to increase a bandwidth of an operating frequency band of the high-frequency radiating arm 22. In one embodiment, the protruding portion 221 may be close to the left side 214 of the high-frequency radiating unit 21, and the high-frequency radiating arm 22, the protruding portion 221 and the left side 214 of the high-frequency radiating unit 21 may form an approximate W-shaped outline. The protrusion 221 may also have a top surface approximately parallel to the ground plane 51.

In some alternative implementations, the right side 213 of the high-frequency radiating unit 21 and the ground portion 40 may form an approximately U-shape and a second opening 62 away from the ground plane 51, and the distance between the high-frequency radiating unit 21, the ground portion 40 and the ground is controlled to increase or decrease the coupling capacitance, so as to adjust the impedance of the antenna. Referring to fig. 6, the ground portion may include first to fifth antenna segments 41 to 45, angles b 1-b 3 formed by the extending directions of the first to third antenna segments 41 to 43 from top to bottom and the first direction are gradually reduced, the fourth antenna segment 44 may be parallel or approximately parallel to the ground plane 51, and the fifth antenna segment 45 may be perpendicular or approximately perpendicular to the ground plane 51. In practical applications, the included angles b 1-b 3 formed by the extending direction of the first antenna segment 41-the third antenna segment 43 from top to bottom and the first direction may be obtuse angles.

In some alternative implementations, with continued reference to fig. 6, the ground portion 40 may form a third opening 63 that is approximately U-shaped and faces the ground plane 51, and the antenna impedance is conveniently adjusted by controlling the length of the ground portion 40. In a specific implementation, the fourth antenna segment 44 may have a larger width than the first to third antenna segments 41 to 43 and the fifth antenna segment 45, and the size of the distributed parallel inductance may be adjusted by controlling the width of the ground portion 40, thereby adjusting the antenna impedance.

In one embodiment, the first 5G antenna 101 and the second 5G antenna 102 are full band antennas, and the isolation between the samples of the first 5G antenna 101 and the second 5G antenna 102 is shown in fig. 7. It can be seen that the isolation between the first 5G antenna 101 and the second 5G antenna 102 is greater than 11dB over the full frequency band range. In the figure: tr2 refers to track 2; s12 refers to a reverse transmission channel; log Mag means that the Y-axis displays amplitude in logarithmic form and the X-axis displays frequency; ref refers to a reference amplitude; start is the Start frequency; stop is the termination frequency; the IFBW, i.e. the intermediate frequency bandwidth, refers to the bandwidth of the intermediate frequency filter inside the network analyzer receiver. The isolation between the other antennas is better than the isolation between the first 5G antenna 101 and the second 5G antenna 102 shown in fig. 7 due to the frequency band difference.

In some alternative implementations, referring to fig. 2, the antenna arrangement may be provided with two C-V2X antennas to connect the vehicle to other vehicles and external devices. Specifically, the antenna device may further include a first C-V2X antenna 105 and a second C-V2X antenna 106 disposed on the upper surface of the first main board 100 and parallel to the first plane; the first C-V2X antenna 105 is near the first side 111 and the third side 113 of the first motherboard 100, and the second C-V2X antenna 106 is near the second side 112 and the fourth side 114 of the first motherboard 100. The distance between the two C-V2X antennas is increased by respectively arranging the two C-V2X antennas at positions adjacent to two opposite corners of the first main board 100, thereby ensuring the isolation between the two C-V2X antennas.

In some alternative implementations, the GNSS antenna 107 may be arranged to provide positioning services. Specifically, the antenna apparatus may further include a GNSS antenna 107 disposed on the upper surface of the first motherboard 100, where the GNSS antenna 107 is located between the second 5G antenna 102 and the third 5G antenna 103. The GNSS antenna 107 is disposed between the two 5G antennas, and the vacant space between the two 5G antennas is effectively utilized, so that the antenna structure is more compact. The GNSS antenna 107 may be a dual-band antenna, and the operating frequency band of the GNSS antenna 107 covers a GPS frequency band, a beidou frequency band, a Glonass frequency band, a galileo L1, and an L2 frequency band.

In some alternative implementations, a WiFi antenna may be provided to provide wireless network communication services. Specifically, the antenna device may further include a first WiFi antenna 108 disposed on the upper surface of the first main board 100 and parallel to the first plane, where the first WiFi antenna 108 is located between the first 5G antenna 101 and the third 5G antenna 103 and is close to the first side 111 of the first main board 100. In a specific implementation, an RKE antenna 109 may be further disposed to provide the remote control door opening and closing service, specifically, the RKE antenna 109 is disposed on the upper surface of the first motherboard 100 and parallel to the first plane, the RKE antenna 109 is located between the first WiFi antenna 108 and the first 5G antenna 101, and the RKE antenna 109 is located near the first side 111 and the fourth side 114, and the RKE antenna 109 is disposed in a manner that the antenna device is more compact.

In some optional implementations, the antenna apparatus may further include an AM/FM/DAB antenna 110 disposed on the upper surface of the first main board 100 and located in the first plane, where the AM/FM/DAB antenna 110 is used to provide analog signal broadcasting and digital signal broadcasting services, and the AM/FM/DAB antenna 110 is located between the first 5G antenna 101 and the second 5G antenna 102, so as to make reasonable use of the free space, and make the antenna apparatus more compact.

In some optional implementations, the vehicle-mounted antenna may further include a second main board 200 disposed below the first main board 100; the second main board 200 has a second connection line parallel to the first connection line 115, the second connection line may be a central axis of the second main board 200, and the second main board 200 further has a left side and a right side located at two sides of the second connection line; the vehicle-mounted antenna further comprises a fifth 5G antenna (not shown in the figure) and/or a second WiFi antenna (not shown in the figure) which are arranged on the upper surface of the second main board 200 and are parallel to the first plane; the fifth 5G antenna is close to the left side of the second main board 200, the second WiFi antenna is close to the right side of the second main board 200, a standby cellular mobile communication service can be provided by setting the fifth 5G antenna, and a standby wireless network communication service can be provided by setting the second WiFi antenna. The second main board 200 is also a PCB, the second main board 200 may be rectangular, and the second main board 200 and the first main board 100 may have the same, similar or different shapes, and in a specific implementation, may be a rounded rectangle or a rectangle with at least one top corner removed.

In some optional implementations, the second main board 200 may further have opposite front and rear sides, and the second connection line connects the front and rear sides of the second main board 200; the vehicle-mounted antenna further comprises a first radio frequency connector 401 and a second radio frequency connector 402 which are positioned between the first main board 100 and the second main board 200; the first rf connector 401 is close to the second connection line and close to the front side of the second main board 200, the second rf connector 402 is close to the second connection line and close to the rear side of the second main board 200, and the rf connectors are respectively close to the front side and the rear side to connect with a plurality of antennas near the front side and the rear side, so as to transmit the radio wave signals received or transmitted by the antennas. The first rf connector 401 and the second rf connector 402 may be part of six-in-one rf connectors, each of which may have six output terminals 403, and may be capable of connecting to 6 antennas and outputting radio wave signals received by the antennas through the output terminals 403.

The foregoing description and drawings are only for purposes of illustrating the preferred embodiments of the present application and are not intended to limit the present application, which is, therefore, to the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present application.

Claims

1. An antenna structure, characterized in that, the antenna structure includes a substrate and a low frequency radiation portion, a high frequency radiation portion, a feed-in portion and a grounding portion disposed on the substrate, wherein:

the low-frequency radiation part comprises a first low-frequency radiation arm and a second low-frequency radiation arm, and the first low-frequency radiation arm and the second low-frequency radiation arm form a first opening;

the high-frequency radiation part comprises a high-frequency radiation unit and a high-frequency radiation arm, the high-frequency radiation unit is provided with an upper side edge and a lower side edge which are opposite, and a left side edge and a right side edge which are opposite, the upper side edge of the high-frequency radiation unit extends into the first opening, the lower side edge of the high-frequency radiation unit is connected to the feed-in part, the right side edge of the high-frequency radiation unit is connected to the grounding part, and the high-frequency radiation arm is connected to the first low-frequency radiation arm;

the feed-in part is used for connecting to a feed-in source;

the grounding part is grounded through the grounding surface of the substrate.

2. The antenna structure according to claim 1, characterized in that the first and second low frequency radiating arms form a flared first opening.

3. The antenna structure according to claim 1, wherein the low-frequency radiating section further includes a third low-frequency radiating arm provided between the first low-frequency radiating arm and the second low-frequency radiating arm and connecting the first low-frequency radiating arm and the second low-frequency radiating arm, respectively, the third low-frequency radiating arm being provided with a first recess having a recess direction toward the ground plane.

4. The antenna structure according to claim 3, wherein the first concave portion has a bottom surface parallel to the ground plane, and two side surfaces perpendicular to and opposite to the bottom surface, respectively.

5. The antenna structure according to claim 1, characterized in that the high-frequency radiating arm is provided with a protrusion approximately parallel to the first low-frequency radiating arm and protruding away from the ground plane.

6. The antenna structure according to claim 1, wherein the lower side of the high-frequency radiating element has a connection point with the feeding portion, the connection point being close to the ground plane;

the contour of the lower side of the high-frequency radiating element has a tendency to move away from the ground plane as it extends from the connection point to the periphery.

7. The antenna structure according to claim 1, wherein a portion of a lower side of the high-frequency radiating unit close to the ground is provided with a second recess having a recess direction away from the ground plane.

8. The antenna structure according to claim 1, wherein a right side of the high-frequency radiating unit forms a second opening that is approximately U-shaped with the ground portion and is away from the ground plane.

9. The antenna structure of claim 1, wherein the ground portion forms a third opening that is approximately U-shaped and is close to the ground plane.

10. The antenna structure according to claim 9, characterized in that a portion of the ground portion remote from the ground plane has a larger width than a portion close to the ground plane.