CN115706313A - Antenna device, housing, and electronic apparatus - Google Patents

Abstract

The application relates to an antenna device, a housing, and an electronic apparatus. The antenna device comprises a radiating body and a feed source, wherein the radiating body comprises a first radiating part, a second radiating part, a feed part and a grounding part; the first radiation part is a bent radiation structure, the second radiation part is arranged in the bent radiation structure and is connected with the first radiation part, and the grounding part is arranged on the first radiation part; the grounding part is suitable for grounding; the feed source is electrically connected to the feeding portion and configured to feed an excitation current to the radiator, and the excitation current flows through the first radiating portion and the second radiating portion so that the radiator radiates a signal of a first frequency band and a signal of a second frequency band, where the second frequency band is different from the first frequency band, which is beneficial to making the overall size of the radiator smaller, thereby promoting miniaturization of the antenna device and reducing the occupation of too much space of the antenna device.

Description

Antenna device, housing, and electronic apparatus

Technical Field

The present application relates to the field of mobile communications technologies, and in particular, to an antenna device, a housing, and an electronic apparatus.

Background

An Ultra Wide Band (UWB) technology is a non-load communication technology that uses nanosecond to microsecond-level non-sine wave narrow pulses to transmit data, and has the advantages of low power consumption, strong penetrability, high positioning accuracy and the like. However, UWB antennas are currently large in size and take up a lot of space.

Disclosure of Invention

The embodiment of the application provides an antenna device, a shell and electronic equipment.

In a first aspect, an embodiment of the present application provides an antenna apparatus, where the antenna apparatus includes a radiator and a feed source, where the radiator includes a first radiation portion, a second radiation portion, a feed portion, and a ground portion; the first radiation part is a bent radiation structure, the second radiation part is arranged in the bent radiation structure and is connected with the first radiation part, and the grounding part is arranged on the first radiation part; the grounding part is suitable for grounding; the feed source is electrically connected to the feed portion and configured to feed an excitation current to the radiator, and the excitation current flows through the first radiation portion and the second radiation portion so that the radiator radiates a signal of a first frequency band and a signal of a second frequency band, wherein the second frequency band is different from the first frequency band.

In some embodiments, the first radiating portion includes a radiating body, a first radiating branch and a second radiating branch, the feeding portion and the grounding portion are both disposed on the radiating body, the first radiating branch and the second radiating branch are disposed at an interval, and the radiating body is connected to the first radiating branch and the second radiating branch; the second radiation part is arranged between the first radiation branch and the second radiation branch and connected with the radiation main body.

In some embodiments, the grounding portion includes a first grounding point and a second grounding point, and the first grounding point and the second grounding point are disposed at a distance from each other on the radiating body.

In some embodiments, the distance between the first ground point and the first radiating stub is less than the distance between the second ground point and the first radiating stub; or/and the distance between the second grounding point and the second radiation branch node is smaller than the distance between the first grounding point and the second radiation branch node.

In some embodiments, the first radiating branch, the second radiating branch and the second radiating portion are connected to the same side of the radiating body and extend toward the same direction.

In some embodiments, the length of the second radiating portion relative to the radiating body from which it projects is less than the length of the first radiating stub relative to the radiating body from which it projects.

In some embodiments, the length of the first radiating branch projecting relative to the radiating body is equal to the length of the second radiating branch projecting relative to the radiating body.

In some embodiments, one side of the second radiating portion is spaced from the first radiating branch and the other side of the second radiating portion is spaced from the second radiating branch.

In some embodiments, the distance between the second radiating portion and the first radiating branch is equal to the distance between the second radiating portion and the second radiating branch.

In some embodiments, the antenna device further includes a dielectric substrate and a metal floor, the dielectric substrate being disposed between the radiator and the metal floor; the dielectric substrate is provided with a conductive through hole which penetrates through the dielectric substrate and is correspondingly connected with the grounding part.

In some embodiments, the first frequency band has a center frequency of 6.5GHz, and the second frequency band has a center frequency of 8GHz.

In some embodiments, the first radiating portion is configured to radiate a signal having a first linear polarization characteristic upon excitation by the excitation current, and the second radiating portion is configured to radiate a signal having a second linear polarization characteristic upon excitation by the excitation current, the first linear polarization characteristic being the same as the second linear polarization characteristic.

In a second aspect, an embodiment of the present application further provides a housing, where the housing includes a housing body and the antenna device of any of the above embodiments, and the antenna device is disposed on the housing body.

In a third aspect, an embodiment of the present application further provides an electronic device, where the electronic device includes a housing and the antenna device of any of the above embodiments, and the antenna device is disposed in the housing.

In the antenna device, the housing and the electronic device provided by the embodiment of the application, the first radiation part of the antenna device is the bent radiation structure, and the second radiation part is arranged in the bent radiation structure and connected with the first radiation part, so that the overall size of the radiation body is small, the miniaturization of the antenna device is further promoted, and the antenna device is reduced to occupy too much space. In addition, the grounding part is arranged on the first radiation part, so that the structure between the first radiation part and the grounding part is arranged compactly, and the overall size of the radiation body is small. Meanwhile, the signals of the first frequency band radiated by the radiating body are different from the signals of the second frequency band, so that the dual-frequency radiation of the antenna device can be realized, and the grounding part is arranged on the first radiation part, so that the resonant frequency of the first radiation part can be adjusted to better adapt to the application scene of the antenna device by changing the position of the grounding part on the first radiation part.

Drawings

In order to more clearly illustrate the technical solution of the application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 shows a schematic structural diagram of an antenna device provided in an embodiment of the present application.

Fig. 2 shows a schematic structural division of the antenna arrangement of fig. 1.

Fig. 3 shows a schematic structural division of the antenna device of fig. 1.

Fig. 4 shows a dimensional schematic of the antenna arrangement of fig. 1.

Fig. 5 shows another schematic structural diagram of the antenna device provided in the embodiment of the present application.

Fig. 6 shows a cut-away schematic view of the antenna device shown in fig. 5.

Fig. 7 shows an enlarged schematic view at v of the antenna arrangement of fig. 6.

Fig. 8 shows a graph of the S-parameter of the antenna arrangement of fig. 1

Fig. 9 shows an antenna efficiency graph of the antenna arrangement of fig. 1.

Fig. 10 shows a vector current distribution diagram for the antenna arrangement of fig. 1 operating at 6.5 GHz.

Fig. 11 shows a vector current distribution diagram for the antenna arrangement of fig. 1 operating at 8GHz.

Fig. 12 shows the antenna arrangement of fig. 1 operating at a radiation pattern of 6.5 GHz.

Fig. 13 shows a polarization ratio diagram for the antenna arrangement of fig. 1 operating at 6.5 GHz.

Fig. 14 shows the antenna arrangement of fig. 1 operating at a radiation pattern of 8GHz.

Fig. 15 shows a polarization ratio diagram for the antenna arrangement of fig. 1 operating at 8GHz.

Fig. 16 is a schematic structural diagram of an antenna device according to another embodiment of the present application.

Fig. 17 is a schematic structural diagram of an antenna device according to still another embodiment of the present application.

Fig. 18 shows a schematic view of a housing provided by an embodiment of the present application.

Fig. 19 shows a schematic diagram of an electronic device provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

As used in the embodiments of the present application, an "electronic device" includes, but is not limited to, an apparatus that is configured to receive/transmit communication signals via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network, and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", a "wireless terminal", an "electronic apparatus" and/or an "electronic device". Examples of electronic devices include, but are not limited to, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; as well as conventional laptop and/or palmtop receivers, game consoles, or other electronic devices that include a radiotelephone transceiver.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

Referring to fig. 1, the present embodiment provides an antenna device 100, and the antenna device 100 is an Ultra Wide Band (UWB) antenna device. According to the Federal Communications Commission (FCC) regulations, the operating frequency band of UWB antennas ranges from 3.1GHz to 10.6GHz, with a minimum operating bandwidth of 500MHz. At present, the central frequency of the frequency band of the mainstream UWB antenna is 6.5GHz and 8GHz, the bandwidth is required to be more than 500MHz, and the CH5 is 6.25-6.75 GHz; 7.75-8.25 GHz of CH 9.

The antenna device 100 includes a radiator 10 and a feed 20, the radiator 10 is electrically connected to the feed 20, for example, the radiator 10 and the feed 20 may be electrically connected by a feed line. The feed 20 is configured to feed an excitation current to the radiator 10 so that the radiator 10 can transceive a radio frequency signal of a predetermined frequency band.

Referring to fig. 2, the radiator 10 includes a first radiation portion 12, a second radiation portion 14, a feeding portion 16 and a grounding portion 18. The first radiation portion 12 is a bent radiation structure, and the second radiation portion 14 is disposed in the bent radiation structure and connected to the first radiation portion 12, and the two are nested structures, which helps to make the overall size of the radiator 10 smaller, thereby promoting miniaturization of the antenna device 100 and helping to reduce the occupation of too much space by the antenna device 100.

The feed 16 may serve as an access point for the radiator 18 to receive the excitation current, e.g., the feed 16 is electrically connected to the feed 20. In the present embodiment, the feeding portion 16 may be provided to the first radiation portion 12; alternatively, the feeding unit 16 may be provided to the second radiation unit 14; alternatively, a part of the structure of the feeding portion 16 may be disposed at the first radiation portion 12, and another part may be disposed at the second radiation portion 14, in which case, the feeding portion 16 may be considered to be located at the connection of the first radiation portion 12 and the second radiation portion 14.

In the present embodiment, the grounding portion 18 is disposed on the first radiation portion 12, the grounding portion 18 is suitable for grounding, for example, the grounding portion 18 may be connected to a metal floor (not shown in fig. 1), which may be a grounding portion of a circuit board, and the grounding portion 18 may be electrically connected to the circuit board, so that the structure between the first radiation portion 12 and the grounding portion 18 is arranged compactly, which facilitates the overall size of the radiator 10 to be small. The feed 20 may be configured to transmit an excitation current to the feeding portion 16, and then an excitation circuit flows through the first radiation portion 12 and the second radiation portion 14 to make the radiator 10 radiate a signal of the first frequency band and a signal of the second frequency band, which is different from the first frequency band, thereby facilitating dual-frequency radiation of the radiator 10, so that the antenna device 100 may be used as a dual-frequency antenna. The signals of the first frequency band and the second frequency band are UWB signals, the central frequency point of the first frequency band may be smaller than the central frequency point of the second frequency band, the first frequency band may be a low frequency band, for example, the central frequency point of the first frequency band is 6.5GHz; the second frequency band may be a high frequency band, for example, the center frequency point of the second frequency band is 8GHz.

In addition, since the grounding portion 18 is disposed on the first radiation portion 12, compared to a case where the grounding portion is disposed outside the radiator (for example, a scheme where the grounding portion is disposed outside the radiator and surrounds the radiator), the path of the excitation current flowing through the first radiation portion 12 can be adjusted by changing the position of the grounding portion 18 disposed on the first radiation portion 12 in the process of manufacturing the radiator 10, which is beneficial to adjusting the resonant frequency of the first radiation portion 12 to better adapt to the application scenario of the antenna apparatus 100. The first radiation portion 12 may present a U-shaped structure. For example, referring to fig. 3, the first radiation portion 12 may include a radiation main body 122, a first radiation branch 124 and a second radiation branch 126, the first radiation branch 124 and the second radiation branch 126 are disposed at an interval, and two ends of the radiation main body 122 are respectively connected to the first radiation branch 124 and the second radiation branch 126. It should be understood that, in the present specification, the above-mentioned designations "radiation main body", "first radiation portion", "second radiation portion", "first radiation branch", "second radiation branch", etc. are all designations used for convenience of description, and these designations are not to be considered as limitations on the structure of the radiator 10, and should be understood as dividing the structure of the radiator 10 to clearly illustrate the service, and there may be a clear boundary between the structures/parts represented by these designations (for example, the radiator 10 is formed by splicing a plurality of radiation branches), or there may be no clear boundary (for example, the radiator 10 is an integrally formed whole).

The first radiation branch 124 and the second radiation branch 126 may be rectangular bars, and the length of the first radiation branch 124 protruding relative to the radiation body 122 may be equal to the length of the second radiation branch 126 protruding relative to the radiation body 122. The first radiation branch 124 and the second radiation branch 126 are substantially parallel to each other, the radiation body 122 may be connected to an end of the first radiation branch 124, the radiation body 122 may also be connected to an end of the second radiation branch 126, and the first radiation branch 124 and the second radiation branch 126 may be connected to the same side of the radiation body 122, so that the radiation body 122, the first radiation branch 124, and the second radiation branch 126 may form a bent radiation structure together.

The second radiation portion 14 is disposed between the first radiation branch 124 and the second radiation branch 126. The second radiating portion 14 may have a rectangular strip shape, and the second radiating portion 14 and the first radiating branch 124 may be substantially parallel to each other. The second radiation portion 14 may be connected to the radiation body 122, for example, the second radiation portion 14, the first radiation branch 124 and the second radiation branch 126 may be connected to the same side of the radiation body 122 and extend toward the same direction, so that the second radiation portion 14, the first radiation branch 124 and the second radiation branch 126 are substantially parallel to each other, which not only facilitates the second radiation portion 14 to be located in the space surrounded by the first radiation portion 12, but also facilitates the dual-frequency radiation effect of the radiation body 10.

The length of the second radiating portion 14 protruding with respect to the radiating body 122 may be smaller than the length of the first radiating branch 124 protruding with respect to the radiating body 122, so that, in the case where the feeding portion 16 is provided to the radiating body 122, for the first radiating portion 12, excitation electricity flows from the feeding portion 16 to the first radiating branch 124 from the radiating body 122; for the second radiating section 14, the excitation current flows from the feeding section 16 to the second radiating section 14, so that the current path of the excitation current on the first radiating section 12 is longer than that on the second radiating section 14, the first radiating section 12 can be used for adjusting the impedance matching of the low frequency band (first frequency band), the second radiating section 14 can be used for adjusting the impedance matching of the high frequency band (second frequency band), and the isolation between the first frequency band of the first radiating section 12 and the second frequency band of the second radiating section 14 is ensured to be large. In addition, the radiator 10 may be implemented as a Planar Inverted-F Antenna (PIFA) structure of an E-shape.

The second radiation part 14 may be spaced apart from the first radiation branch 124 and the second radiation branch 126, respectively, for example, one side of the second radiation part 14 is spaced apart from the first radiation branch 124, and the other side of the second radiation part 14 is spaced apart from the second radiation branch 126. The distance between the second radiating portion 14 and the first radiating branch 124 may be equal to the distance between the second radiating portion 14 and the second radiating branch 126.

It should be understood that the above-mentioned designations of "radiation portion", "main body" and "radiation branch" are only for convenience of description, and the designations do not limit the specific structure of the radiator 10, so that the radiator 10 as a whole may be an integral structure, and there may be no distinct boundary line between "radiation portion", "main body" and "radiation branch".

In the case where the feeding portion 16 is disposed on the first radiating portion 12, the feeding portion 16 may be disposed on the radiating body 122, for example, the feeding portion 16 may be located at a substantially middle position of the radiating body 122, so that a distance between the feeding portion 16 and the first radiating branch 124 may be substantially equal to a distance between the feeding portion 16 and the second radiating branch 126, which facilitates an excitation circuit fed into the feeding portion 16 by the feeding portion 20 to have a path toward the first radiating branch 124 equal to a path toward the second radiating branch 126.

In the case where the feeding portion 16 is disposed on the second radiating portion 14, the feeding portion 16 may be located approximately midway on the second radiating portion 14 such that the distance between the feeding portion 16 and the first radiating branch 124 may be approximately equal to the distance between the feeding portion 16 and the second radiating branch 126.

In the case where a part of the structure of the feeding portion 16 is disposed on the first radiation portion 12, and another part of the structure is disposed on the second radiation portion 14, the feeding portion 16 may be located approximately in the middle of the connection between the radiation main body 122 and the second radiation portion 14, so that the distance between the feeding portion 16 and the first radiation branch 124 may be approximately equal to the distance between the feeding portion 16 and the second radiation branch 126.

The feed 16 and the feed 20 may be electrically connected by a microstrip line, which in turn helps to increase the impedance bandwidth of the radiator 10 by positively influencing the resonance performance of the radiator 10, since the distributed capacitance and the distributed inductance may be changed by changing the length and width of the microstrip line. Therefore, the microstrip line can serve as a feed path and also provide a tuning function, so that the impedance bandwidth of the antenna is widened, and broadband operation is realized.

The ground portion 18 may be provided to the radiation body 122. The ground portion 18 may be electrically connected to a flexible printed circuit board having a metal floor to realize grounding of the antenna device 100. The grounding portion 18 may include a first grounding point 182 and a second grounding point 184, and the first grounding point 182 and the second grounding point 184 are disposed at a distance from each other on the radiation body 122. Further, the distance between the first grounding point 182 and the first radiating branch 124 is smaller than the distance between the second grounding point 184 and the first radiating branch 124. The distance between the second grounding point 184 and the second radiating branch 126 is smaller than the distance between the first grounding point 182 and the second radiating branch 126. For example, the first grounding point 182 may be disposed at an end of the radiating body 122 close to the first radiating branch 124, the second grounding point 184 may be disposed at an end of the radiating body 122 close to the second radiating branch 126, and the first grounding point 182 and the second grounding point 184 facilitate adjusting the resonant frequency of the first radiating portion 12 to better adapt to the application scenario of the antenna apparatus 100. For example, the first grounding point 182 and the second grounding point 184 are provided with conductive through holes, and the conductive through holes of the first grounding point 182 and the conductive through holes of the second grounding point 184 can be installed with conductive structures to electrically connect with the metal floor.

Referring to fig. 4, in the present embodiment, in order to obtain a better resonance effect and improve the signal receiving and transmitting efficiency, the structure of the antenna apparatus 100 satisfies the following geometric constraint conditions:

the length L1 of the first radiation portion 12 may range from 15 mm to 30 mm (inclusive), for example, the length L1 of the first radiation portion 12 may range from 15 mm, 18 mm, 20 mm, 22 mm, 25 mm, 26 mm, 28 mm, 30 mm, etc. In the present embodiment, the dimension L1 in the longitudinal direction of the first radiation portion 12 is understood as a dimension occupied by the radiation structure of the first radiation portion 12 in the longitudinal direction.

The length L2 of the second radiation portion 14 may range from 8 mm to 18 mm (inclusive), for example, the length L2 of the second radiation portion 14 may range from 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, etc. In the present embodiment, the dimension L2 of the second radiation portion 14 in the longitudinal direction is understood as a dimension occupied by the radiation structure of the second radiation portion 14 in the longitudinal direction. When the second radiation part 14 is directly connected to the radiation body 122 (there is no gap therebetween), the dimension L2 in the length direction of the second radiation part 14, that is, the length dimension of the second radiation part 14 protruding with respect to the radiation body 122. Further, in the present embodiment, L2< L1.

The length L3 of the first radiation branch 124 protruding relative to the radiation body 122 can range from 10 mm to 28 mm (inclusive), for example, the length L3 of the first radiation branch 124 protruding relative to the radiation body 122 can range from 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 20 mm, 22 mm, 25 mm, 26 mm, 28 mm, and so on. In the present embodiment, L3> L2, so that the second radiation portion 14 cannot be protruded relative to the end of the first radiation branch 124 but is completely disposed in the space enclosed by the first radiation portion 12, thereby ensuring a large isolation between the first frequency band of the first radiation portion 12 and the second frequency band of the second radiation portion 14.

The width-directional dimension W1 of the first radiating portion 12 may range from 12 mm to 25 mm (inclusive), for example, the width-directional dimension W1 of the first radiating portion 12 may be 12 mm, 13 mm, 14 mm, 15 mm, 18 mm, 20 mm, 22 mm, 25 mm, etc. In the present embodiment, the dimension W1 of the first radiation portion 12 in the width direction is understood to be a dimension occupied by the radiation structure of the first radiation portion 12 in the width direction, and the dimension W1 of the first radiation portion 12 in the width direction is also the dimension of the radiation main body 122 in the direction.

The width-wise dimension W2 of the first radiating branch 124 may range from 2 mm to 6 mm (inclusive), e.g., the width-wise dimension W2 of the first radiating branch 124 may be 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, etc.

The second radiating branch 126 has the same dimensional parameters as the first radiating branch 124.

The width-directional dimension W3 of the second radiation portion 14 may range from 8 to 21 mm (inclusive), for example, the width-directional dimension W3 of the second radiation portion 14 may range from 8 mm, 9 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 21 mm, and the like. In this embodiment, W3<2 × W2.

The distance W4 between the second radiating portion 14 and the first radiating branch 124 may range from 0.5 mm to 2 mm (inclusive), for example, the distance W4 between the second radiating portion 14 and the first radiating branch 124 may range from 0.5 mm, 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, and the like. In this embodiment, W4< W3, W4< W2.

The distance between the second radiating portion 14 and the second radiating branch 126 is equal to the distance between the second radiating portion 14 and the first radiating branch 124.

The grounding portion 18 may be located at one side of the first radiation portion 12, for example, the grounding portion 18 has a dimension L4 from the outer edge of the first radiation portion 12 along the length direction of the first radiation portion 12, and the aperture of the conductive through hole of the first grounding point 182

Can be in the range of0.1-0.3 mm inclusive, e.g.

Can be 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, etc.; the center of the conductive via of the first ground point 182 is spaced from the outer edge of the first radiating portion 12 along the length direction of the first radiating portion 12 by a dimension L4, which may be 1-2 mm (inclusive), for example, L4 may be 1 mm, 1.5 mm, 2 mm, etc.

The dimensional parameters of the second ground point 184 are the same as the dimensional parameters of the first ground point 182.

Based on the geometric constraint conditions described above, the radiation efficiency of the antenna device 100 can be made higher. It is to be noted that the first radiation portion 12 is used for adjustment of impedance matching in a low frequency band (first frequency band), and the second radiation portion 14 is used for adjustment of impedance matching in a high frequency band (second frequency band).

Referring to fig. 5 and 6, the antenna device 100 may further include a dielectric substrate 30 and a metal floor 40, the dielectric substrate 30 is disposed between the metal floor 40 and the radiator 10, the ground 18 may be configured to electrically connect the antenna device 100 to the metal floor 40, and the metal floor 40 may implement the grounding of the antenna device 100.

Referring to fig. 6 and 7, the dielectric substrate 30 may be provided with a conductive via 32, and the conductive via 32 penetrates through the dielectric substrate 30 and is correspondingly connected to the grounding portion 18. The conductive via 32 may include a first via and a second via, the first via may penetrate through the dielectric substrate 30 and be correspondingly connected to the first ground point 182, wherein the first via is opposite to the conductive through hole of the first ground point 182; a second via may penetrate the dielectric substrate 30 and be correspondingly connected to the second ground point 184, wherein the second via is opposite to the conductive through hole of the second ground point 184.

The dielectric substrate 30 may be made of Epoxy resin (FR 4 Epoxy), and the dielectric substrate 30 has a relative dielectric constant of 4.4 and a dielectric loss tangent of 0.02. The dielectric substrate 30 and the metal floor 40 may be integrated into a printed circuit board, which may be a multi-layer board, and the radiator 10 of the antenna device 100 may be formed on a surface of the printed circuit board, which may be a flexible printed circuit board, by etching.

Referring to fig. 8 and 9, the antenna device 100 of the present application has high efficiency, and the first radiation portion 12 may be a low frequency radiation patch, which operates in a first frequency band, has a center frequency of approximately 6.5GHz, and has a bandwidth greater than or equal to 500MHz. The second radiation portion 14 may be a high frequency radiation patch, which operates in the second frequency band, the central frequency point is approximately 8GHz, and the bandwidth is greater than or equal to 500MHz.

Referring to fig. 10, when the antenna device 100 operates in the first frequency band (the center frequency point is about 6.5 GHz), the vector current is distributed around the first radiation branch 124 and the second radiation branch 126, the current flowing through the first radiation branch 124 excites the signal in the first frequency band, and the current flowing through the second radiation branch 126 also excites the signal in the first frequency band. Thus, the low frequency resonance can be adjusted by changing the distance between the ground 18 and the radiating branch, for example, the distance between the first ground point 182 and the first radiating branch 124 can be changed, and the distance between the second ground point 184 and the second radiating branch 126 can be changed, for example, to help excite the 1/4 wavelength resonant beam of the lower frequency. The larger the distance between the first grounding point 182 and the first radiating branch 124 (or the distance between the second grounding point 184 and the second radiating branch 126), the longer the current path, the lower the tuned frequency; the smaller the distance between the first grounding point 182 and the first radiating branch 124 (or the distance between the second grounding point 184 and the second radiating branch 126), the smaller the current path, and the higher the tuned frequency.

Referring to fig. 11, when the antenna device 100 operates in the second frequency band (the center frequency point is about 8 GHz), the vector currents are distributed in the gaps between the second radiation portion 14, the second radiation portion 14 and the first radiation branch 124, and the gaps between the second radiation portion 14 and the second radiation branch 126, the current flowing through the second radiation portion 14 excites the signal in the second frequency band, the current flowing through the gaps between the second radiation portion 14 and the first radiation branch 124 also excites the signal in the second frequency band, and the current flowing through the gaps between the second radiation portion 14 and the second radiation branch 126 also excites the signal in the second frequency band. Therefore, adjusting the length of the second radiation portion 14 protruding with respect to the radiation body 122 can adjust the high-frequency resonance, contributing to high-frequency excitation of the slot mode of the E-shaped antenna. The longer the length of protrusion of the second radiating part 14 with respect to the radiating body 122, the longer the current path, the lower the tuned frequency, whereas the shorter the length of protrusion of the second radiating part 14 with respect to the radiating body 122, the shorter the current path, the higher the tuned frequency.

Further, in the present embodiment, the first radiation portion 12 is configured to radiate a signal having a first linear polarization characteristic under excitation of the excitation current, and the second radiation portion 14 is configured to radiate a signal having a second linear polarization characteristic under excitation of the excitation current, where the first linear polarization characteristic is the same as the second linear polarization characteristic. It should be understood that in the present embodiment, the polarization characteristic is used to characterize the direction in which the signal radiated by the radiator 10 oscillates in the propagation medium, and the polarization/signal polarization characteristic of the antenna is a parameter describing the vector spatial orientation of the electromagnetic wave radiated by the antenna. Since the electric field and the magnetic field have a constant relationship, the polarization direction of electromagnetic waves radiated from the antenna is generally directed in the space of the electric field vector. The linear polarization represents that the orientation of an electric field vector corresponding to an electromagnetic wave in space is constant, for example, with reference to the ground, if the direction of the electric field vector corresponding to the electromagnetic wave is parallel to the ground, the linear polarization characteristic of the electromagnetic wave is horizontal polarization, and if the direction of the electric field vector corresponding to the electromagnetic wave is perpendicular to the ground, the linear polarization characteristic of the electromagnetic wave is vertical polarization. In some embodiments of the present application, for example, the first linear polarization and the second linear polarization may each be a vertical polarization; as another example, both the first linear polarization and the second linear polarization may be horizontally polarized; as another example, the first linear polarization and the second linear polarization may not necessarily be strictly vertical polarizations, but may have polarization components in the vertical direction, or the first linear polarization and the second linear polarization may not necessarily be strictly polarization, but may have polarization components in the horizontal direction.

Referring to fig. 12 and 13, fig. 12 shows a radiation pattern of the antenna apparatus 100 at 6.5GHz, and the first radiation portion 12 and the second radiation portion 14 have the same linear polarization characteristic when operating, so that the antenna apparatus 100 has the same linear polarization characteristic in two frequency band ranges, has a higher cross polarization ratio in both the E/H plane and the main beam radiation range, and the cross polarization ratio (main polarization component to cross polarization component) is approximately 10dB, which ensures that the antenna apparatus 100 has better interference immunity.

Referring to fig. 14 and 15, fig. 14 shows a radiation pattern of the antenna apparatus 100 at 8GHz, and the first radiation section 12 and the second radiation section 14 also have the same linear polarization characteristic when operating, so that the antenna apparatus 100 has the same linear polarization characteristic in two frequency band ranges, has a higher cross polarization ratio in both the E/H plane and the main beam radiation range, and the cross polarization ratio (main polarization component to cross polarization component) is approximately 10dB, which ensures that the antenna apparatus 100 has better interference immunity.

Referring to fig. 16, fig. 16 is a schematic view illustrating another structure of the antenna device 100 according to the present embodiment, in which two side edges of the first radiating branch 124 are substantially zigzag. Furthermore, a plurality of notches 5231 are formed on two side edges of the first radiating branch 124, and the notches 5231 are sequentially arranged at intervals, so that the two side edges of the first radiating branch 124 are substantially in a zigzag structure. Further, the first radiation branch 124 includes a first side 5233 and a second side 5235 that are opposite to each other, the second side 5235 is opposite to the second radiation portion 54, the notches 5231 are sequentially arranged on the first side 5233 and the second side 5235 at intervals, and the notches 5231 on the first side 5233 and the notches 5231 on the second side 5235 are arranged in a staggered manner, so that the current path can propagate along a direction defined by a boundary of the notches 5231, and thus the current path can be further increased, and the size of the radiator 10 can be further reduced on the premise that the length of the current path in the first radiation portion 12 meets the requirement of the operating frequency band.

In some specific examples, the shape of the notch 5231 is not limited, and can be any one or combination of triangular notches (fig. 16), rectangular notches (fig. 17), trapezoidal notches, arc notches, and the like. It should be noted that the depth P of the plurality of notches 5231 (i.e., the maximum dimension of the notch 5231 recessed with respect to the edge of the first radiation branch 124) should be greater than half of the width-wise dimension W2 of the first radiation branch 124, so that the current path of the first radiation branch 124 is a bent path, and the current path can be elongated.

The edges of the two sides of the second radiation branch 124 may also be provided with notches, and the specific structure condition may be the same as that of the first radiation branch 124.

Referring to fig. 18, based on the antenna device 100, the present embodiment further provides a housing 200, where the housing 200 may be applied to an electronic device, for example, the housing 200 may serve as a protective housing of the electronic device and may also serve as a casing of the electronic device. The case 200 will be described below using a protective case as an example. When the housing 200 serves as a protective case, it serves as a casing member of the electronic device, protecting the electronic device from being damaged by impact, scratch, or the like. The electronic device may be, but is not limited to: portable communication devices (e.g., cell phones, etc.), tablet computers, personal digital assistants, and the like.

The housing 200 includes the antenna device 2001 and the housing main body 2003, and the antenna device 2001 is provided in the housing main body 2003, and the arrangement, parameters, and the like of the antenna device 2001 in the present embodiment may be substantially the same as those of the antenna device 100 in any of the above embodiments. The antenna device 2001 may be directly embedded in the housing body 2003 or may be provided on the surface of the housing body 2003, which is not limited in the present application. The case body 2003 includes a body 201 and a side wall 203. The antenna device 2001 is disposed on the body 201, and the sidewall 203 is connected to a side of the body 201 and extends along a direction substantially perpendicular to the body 201, such that the body 201 and the sidewall 203 form a receiving space 2011 together. The housing space 2011 is used for housing electronic devices.

In other embodiments, the housing 200 may serve as an outer casing of the electronic device, which forms an external appearance surface of the electronic device together with a display screen of the electronic device, and is used for accommodating and protecting internal electronic components of the electronic device.

Referring to fig. 19, an electronic device 400 is further provided in the present embodiment, where the electronic device 400 may be, but is not limited to, an electronic device such as a mobile phone, a tablet computer, and a smart watch. The electronic device 400 of the present embodiment is described by taking a mobile phone as an example.

The electronic device 400 includes a housing 401 and an antenna device 405, and the antenna device 405 is disposed on the housing 401. The electronic device 400 may further include a display 403, where the display 403 typically includes a display panel, and may also include circuitry for responding to touch operations on the display panel, and the like. The Display panel may be a Liquid Crystal Display (LCD), and in some embodiments, the Display panel may also be a touch screen.

Specifically, in the embodiment of the present application, the housing 401 includes a rear casing 4011 and a middle frame 4013, and the rear casing 4011 and the display screen 403 are respectively disposed on two opposite sides of the middle frame 403.

In this embodiment, the antenna device 405 may be any one of the antenna devices 100 provided in the above embodiments, or may include a combination of any one or more features of the above antenna devices 100, and the related features may refer to the foregoing embodiments, which are not described in detail in this embodiment. The antenna device 405 is integrated in the housing 401 or disposed in the housing 401, for example, the antenna device 405 may be disposed on the middle frame 4013, the rear case 4011, the main board of the electronic device 400, or other electronic devices and housed in the housing 401, which is not limited in this specification.

In the antenna device, the housing and the electronic device provided by the embodiment of the application, the first radiation part of the antenna device is the bent radiation structure, and the second radiation part is arranged in the bent radiation structure and connected with the first radiation part, so that the overall size of the radiation body is small, the miniaturization of the antenna device is further promoted, and the antenna device is reduced to occupy too much space. In addition, the grounding part is arranged on the first radiation part, so that the structure between the first radiation part and the grounding part is arranged compactly, and the overall size of the radiation body is small. Meanwhile, the signals of the first frequency band radiated by the radiating body are different from the signals of the second frequency band, so that the dual-frequency radiation of the antenna device can be realized, and the grounding part is arranged on the first radiation part, so that the resonant frequency of the first radiation part can be adjusted to better adapt to the application scene of the antenna device by changing the position of the grounding part on the first radiation part.

In this specification, a schematic representation of terms does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the various embodiments or examples and features of the various embodiments or examples described in this specification can be combined and combined by those skilled in the art without being mutually inconsistent.

In the present specification, when an element is referred to as being "disposed on" another element, it can be directly connected to the other element or intervening elements may be present (i.e., indirectly connected to the other element); when a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present, i.e., there may be an indirect connection between the two components.

In this specification, particular features or characteristics described may be combined in any one or more embodiments or examples as appropriate. Furthermore, the various embodiments or examples and features of the various embodiments or examples described in this specification can be combined and combined by those skilled in the art without being mutually inconsistent. Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the present disclosure.

Claims (14)

1. An antenna device is characterized in that the antenna device comprises a radiator and a feed source, wherein the radiator comprises a first radiation part, a second radiation part, a feed part and a grounding part; the first radiation part is a bent radiation structure, and the second radiation part is arranged in the bent radiation structure and is connected with the first radiation part; the grounding part is arranged on the first radiation part; the grounding part is suitable for grounding;

the feed source is electrically connected to the feeding portion and configured to feed an excitation current to the radiator, and the excitation current flows through the first radiating portion and the second radiating portion so that the radiator radiates a signal of a first frequency band and a signal of a second frequency band, where the second frequency band is different from the first frequency band.

2. The antenna device according to claim 1, wherein the first radiation portion includes a radiation main body, a first radiation branch and a second radiation branch, the feeding portion and the grounding portion are both disposed on the radiation main body, the first radiation branch and the second radiation branch are disposed at an interval, and two ends of the radiation main body are respectively connected to the first radiation branch and the second radiation branch; the second radiation part is arranged between the first radiation branch and the second radiation branch and connected with the radiation main body.

3. The antenna device of claim 2, wherein the grounding portion includes a first grounding point and a second grounding point, the first grounding point and the second grounding point being disposed at a distance from each other on the radiating body.

4. The antenna device of claim 3, wherein a distance between the first ground point and the first radiating stub is less than a distance between the second ground point and the first radiating stub; or/and

the distance between the second grounding point and the second radiation branch node is smaller than the distance between the first grounding point and the second radiation branch node.

5. The antenna device of claim 2, wherein the first radiating stub, the second radiating stub, and the second radiating portion are connected to a same side of the radiating body and extend in a same direction.

6. The antenna device of claim 5, wherein a length of the second radiating portion projecting with respect to the radiating body is less than a length of the first radiating stub projecting with respect to the radiating body.

7. The antenna device of claim 5, wherein a length of said first radiating branch projecting with respect to said radiating body is equal to a length of said second radiating branch projecting with respect to said radiating body.

8. The antenna device of claim 5, wherein one side of the second radiating portion is spaced from the first radiating stub and another side of the second radiating portion is spaced from the second radiating stub.

9. The antenna device of claim 8, wherein a spacing between the second radiating portion and the first radiating stub is equal to a spacing between the second radiating portion and the second radiating stub.

10. The antenna device according to claim 1, further comprising a dielectric substrate and a metal ground, wherein the dielectric substrate is disposed between the radiator and the metal ground; the dielectric substrate is provided with a conductive through hole which penetrates through the dielectric substrate and is correspondingly connected with the grounding part.

11. The antenna device according to any of claims 1 to 10, wherein the center frequency point of the first frequency band is 6.5GHz, and the center frequency point of the second frequency band is 8GHz.

12. The antenna device according to claim 11, wherein the first radiation section is configured to radiate a signal having a first linear polarization characteristic under the excitation of the excitation current, and the second radiation section is configured to radiate a signal having a second linear polarization characteristic under the excitation of the excitation current, the first linear polarization characteristic being the same as the second linear polarization characteristic.

13. A housing comprising a housing body and an antenna device as claimed in any one of claims 1 to 12, the antenna device being provided to the housing body.

14. An electronic device comprising a housing and the antenna device of any one of claims 1 to 12, the antenna device being disposed on the housing.

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