CN113013596A

CN113013596A - Antenna device, housing, and electronic apparatus

Info

Publication number: CN113013596A
Application number: CN202110220953.9A
Authority: CN
Inventors: 雍征东; 罗嘉文
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-06-22
Anticipated expiration: 2041-02-26
Also published as: WO2022179324A1; CN113013596B

Abstract

The application relates to an antenna device, a housing, and an electronic apparatus. The antenna device comprises a feed source, a radiator and a feed line connected between the radiator and the feed source, wherein the radiator comprises a first radiation part and a second radiation part. The first radiation part is provided with a bent radiation structure, the second radiation part is provided with a bent radiation structure, and the second radiation part is nested in the bent radiation structure of the first radiation part; the feeder line is a microstrip line feeder line and is connected to the second radiation part. The feed source is configured to feed an excitation current to the radiator via the feed line, so that the first radiation portion radiates a signal of a first frequency band, and the second radiation portion radiates a signal of a second frequency band, wherein the second frequency band is different from the first frequency band, and the antenna device is an ultra-wideband antenna. According to the antenna device, the size of the radiating body can be smaller on the premise that the length of the current path in the radiating body meets the requirement of the working frequency band, and further the size of the whole antenna device can be smaller.

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

With the development and progress of science and technology, the communication technology has been developed rapidly and greatly, wherein, the Ultra Wide Band (UWB) technology is a no-load communication technology, and uses nanosecond to microsecond non-sine wave narrow pulse to transmit data. In recent years, UWB antennas based on UWB technology have been gradually a research hotspot due to their advantages of low power consumption, high penetration, high positioning accuracy, and the like.

The current UWB antenna generally adopts a circular monopole and a feeder to form an antenna radiator, and in such a UWB antenna structure, in order to meet the requirement of a higher operating frequency band, a current path in the radiator of the UWB antenna needs to reach a certain length, which requires that the size of the radiator is larger, and accordingly, the size of the overall structure of the UWB antenna is also relatively larger.

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, which includes a feed source, a radiator, and a feed line connected between the radiator and the feed source, where the radiator includes a first radiation portion and a second radiation portion. The first radiation part is provided with a bent radiation structure, the second radiation part is provided with a bent radiation structure, and the second radiation part is nested in the bent radiation structure of the first radiation part; the feeder line is a microstrip line feeder line and is connected to the second radiation part. The feed source is configured to feed an excitation current to the radiator via the feed line, so that the first radiation portion radiates a signal of a first frequency band, and the second radiation portion radiates a signal of a second frequency band, wherein the second frequency band is different from the first frequency band, and the antenna device is an ultra-wideband antenna.

In a second aspect, an embodiment of the present application further provides an antenna module, which includes three antenna devices as described above, and the three antenna devices are arranged in an array.

In a third aspect, an embodiment of the present application further provides a housing, which includes a housing body and any one of the antenna devices described above, where the antenna device is disposed on the housing body.

In a fourth aspect, an embodiment of the present application further provides an electronic device, which includes a display screen and the antenna apparatus of any one of the foregoing.

In the antenna device, the housing and the electronic device provided in the embodiment of the application, the radiator of the antenna device includes a first radiation part and a second radiation part; the first radiation part is provided with a bent radiation structure, the second radiation part is provided with a bent radiation structure, and the second radiation part is nested in the bent radiation structure of the first radiation part; the feeder line is a microstrip line feeder line, the feeder line is connected to the second radiation part, and the radiator of the antenna device is formed by adopting the nested bent radiation structure (the first radiation part and the second radiation part), so that the size of the radiator can be smaller on the premise of ensuring that the length of a current path in the radiator meets the requirement of a working frequency band, and further the size of the whole antenna device can be smaller.

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

Fig. 2 is a graph of S-parameter and antenna efficiency of the antenna device shown in fig. 1.

Fig. 3 is a schematic diagram of another structure of an antenna device according to an embodiment of the present application.

Fig. 4 is a schematic size diagram of the antenna device shown in fig. 3.

Fig. 5 is a vector current distribution diagram of the antenna device shown in fig. 3.

Fig. 6 is a polarization ratio diagram of the antenna device shown in fig. 3.

Fig. 7 is a schematic cross-sectional view of a structure of an antenna device according to an embodiment of the present application.

Fig. 8 is a schematic cross-sectional view of another structure of an antenna device according to an embodiment of the present application.

Fig. 9 is a schematic diagram of another structure of an antenna device according to an embodiment of the present application.

Fig. 10 is a schematic diagram of another structure of an antenna device according to an embodiment of the present application.

Fig. 11 is a schematic diagram of another structure of an antenna device according to an embodiment of the present application.

Fig. 12 is a schematic diagram of another structure of an antenna device according to an embodiment of the present application.

Fig. 13 is a schematic diagram of an antenna module according to an embodiment of the present application.

Fig. 14 is a schematic view of the antenna module shown in fig. 13 at an azimuth angle of a sensing signal source.

Fig. 15 is a schematic view of a housing provided in an embodiment of the present application.

Fig. 16 is 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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As used in embodiments herein, "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, gaming consoles, or other electronic devices that include radiotelephone transceivers.

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, an antenna device 100 according to an embodiment of the present invention includes a feed 10, a feed 30, and a radiator 50, where the feed 30 is connected between the feed 10 and the radiator 50, and the feed 10 is configured to feed an excitation current to the radiator 50 through the feed 30, so that the radiator 50 can transmit and receive a radio frequency signal in a predetermined frequency band.

In the embodiment of the present application, the radiator 50 includes the first radiation portion 52 and the second radiation portion 54, the first radiation portion 52 has a bent radiation structure, the second radiation portion 54 also has a bent radiation structure, the second radiation portion 54 is nested in the bent radiation structure of the first radiation portion 52, and the radiator 50 of the antenna device 100 is formed by using the nested bent radiation structure, so that the size of the radiator 50 can be smaller on the premise that the length of the current path in the radiator 50 meets the requirement of the operating frequency band, and further, the size of the entire antenna device 100 can be smaller.

In the present embodiment, the bent structure of the first and

second radiation portions

52 and 54 is a U-shaped structure.

The first radiation part 52 includes a first main body 521 and two first radiation branches 523, the two first radiation branches 523 are disposed at an interval, and the first main body 521 is connected between the two first radiation branches 523. Further, the first radiating branches 523 may be rectangular bars, the two first radiating branches 523 are parallel to each other, and the first main body 521 may be connected to the ends of the first radiating branches 523 to form a U-shaped bent radiating structure together with the two first radiating branches 523.

The second radiation portion 54 is disposed between the two first radiation branches 523 and connected to the first body 521. The second radiation portion 54 includes a second body 541 and two second radiation branches 543, the two second radiation branches 543 are disposed at an interval, and the second body 541 is connected between the two second radiation branches 543. Further, the second radiation branches 543 may be rectangular strips, the two second radiation branches 543 are substantially parallel to each other, and the second body 541 may be connected to the ends of the second radiation branches 543 to form a U-shaped bent radiation structure together with the two second radiation branches 543.

Further, the two second radiation branches 543 are located between the two first radiation branches 523, and the two first radiation branches 523 and the two second radiation branches 543 are arranged in parallel along the same direction. The second body 541 may be connected to an end of the second radiation branch 543 close to the first body 521, and connected to the first body 521. In this embodiment, there is no space between the second body 541 and the first body 521, and the second body 541 may be understood as a portion of the structure directly extending from the first body 521, while in other embodiments, a space may be provided between the second body 541 and the first body 521, and the two may be connected by an additional connection portion. It should be understood that the above-mentioned designations of "main body" and "radiation branches" are only for convenience of description, and the designations should not be limited to the specific structure of the radiator 50, for example, the radiator 50 may be an integral structure, and no clear boundary line may be provided between the "main body" and the "radiation branches".

In the embodiment of the present application, the feed line 30 is a microstrip line feed line, which is connected to the second radiation section 54. The feed 10 is configured to feed an excitation current to the radiator 50 through the feed line 30, and since the radiator 50 has a nested bent radiation structure (U-shaped structure), a current path of the excitation current on the first radiation portion 52 is longer than a current path on the second radiation portion 54, and under excitation of the excitation current, the first radiation portion 52 radiates a signal in a first frequency band, the second radiation portion 54 radiates a signal in a second frequency band, and the second frequency band is different from the first frequency band, so that the antenna device 100 can be used as a dual-band antenna.

In some embodiments, the feeding line 30 may be disposed in the bent structure of the second radiation part 54 and connected to the second body 541. For example, the feed line 30 may be disposed between the two second radiation branches 543, and substantially parallel to the two second radiation branches 543, and may be laid out toward the outside of the U-shaped bent structure of the second radiation portion 54. In the embodiment of the present application, the microstrip line is used as the feeder 30, which allows the length and width of the tuning microstrip line to be changed, so that the distributed capacitance and distributed inductance of the tuning microstrip line can be changed, thereby positively affecting the resonance performance of the antenna and increasing the impedance bandwidth of the antenna. Therefore, the microstrip feeder 30 can serve as a feed path and provide a tuning function, so as to widen the impedance bandwidth of the antenna, realize broadband operation, and meet the communication requirements of WLAN (2.4GHz-2.483GHz), WiMAX (2.5GHz-2.69GHz), WiMAX (3.4GHz-3.69GHz), Ultra Wide Band (UWB) (3.1GHz-8GHz), S-Band and C-Band. In some specific embodiments, the feed line 30 may adopt a microstrip line with a rectangular structure or a microstrip line with a T-shaped structure.

In the embodiment of the present application, the antenna device 100 based on the above structure is a UWB antenna, and the signals of the first frequency band and the second frequency band are ultra wide bandwidth signals. UWB antennas are short-range wireless communication systems, and their transmission distance is usually within 10 meters, and a bandwidth of 1GHz or more is usually used. The UWB antenna does not adopt a carrier wave, but utilizes a nanosecond-picosecond-level non-sine wave narrow pulse to transmit data, so that the occupied frequency spectrum range is wide, the UWB antenna is suitable for high-speed and short-distance wireless communication, and the communication efficiency is high. The Federal Communications Commission (FCC) of the united states stipulates that the operating frequency band of UWB antennas range from 3.1GHz to 10.6GHz with a minimum operating bandwidth of 500 MHz. Currently, the central frequency of the frequency band of the mainstream UWB antenna is 6.5GHz and 8GHz, the bandwidth requirement is more than 500MHz, and CH5 is 6.25-6.75 GHz; CH9 at 7.75-8.25 GHz.

In this embodiment of the application, the signals of the first frequency band and the second frequency band are ultra wide bandwidth signals, and the first frequency band is different from the second frequency band, please refer to fig. 2, where fig. 2 shows an S parameter curve and an antenna efficiency curve of the antenna device 100 of this embodiment. As can be seen from fig. 2, the antenna device 100 has high efficiency, and the second radiation portion 54 may be a high frequency radiation patch, which operates in a first frequency band, has a central frequency of approximately 8GHz, and has a bandwidth greater than or equal to 500 MHz; the first radiation portion 52 may be a low frequency radiation patch, which operates in the second frequency band, the center frequency point is approximately 6.5GHz, and the bandwidth is greater than or equal to 500 MHz.

Referring to fig. 3, the antenna device 100 further includes a grounding portion 70, the grounding portion 70 is disposed around the periphery of the radiator 50, and the grounding portion 70 is used for connecting a metal floor of the antenna device 100 to realize grounding of the antenna device 100. In the embodiment shown in fig. 3, the grounding portion 70 is disposed substantially around the outer periphery of the radiator 50, that is, substantially around the outside of the first radiation portion 52. In some embodiments, the ground portion 70 may include conductive vias 72, and the conductive vias 72 may be arranged in an array on the periphery of the radiator 50, and penetrate through a metal radiating patch and a dielectric substrate used to form the radiator 50 and are connected to a metal ground of the antenna device 100.

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 52 may be in a range of 15-30 mm (inclusive), for example, the length L1 of the first radiation portion 52 may be 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 part 52 is understood as the dimension occupied by the U-shaped bent structure of the first radiation part 52 in the longitudinal direction.

The length L2 of the second radiating portion 54 may be in a range of 8-18 mm (inclusive), for example, the length L2 of the second radiating portion 54 may be 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 L1 in the length direction of the second radiation portion 54 is understood as the dimension occupied by the U-shaped bent structure of the second radiation portion 54 in the length direction. When the second body 541 of the second radiation part 54 is directly connected to the first body 521 (there is no gap therebetween), the dimension L1 of the second radiation part 54 in the length direction is the dimension of the second radiation part 54 protruding with respect to the first body 521. Further, in the present embodiment, L2< L1.

The protruding length L3 of the second radiation branch 543 relative to the second body 541 can range from 7 mm to 13 mm (inclusive), for example, the protruding length L3 of the second radiation branch 543 relative to the second body 541 can range from 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, etc.

The length L4 of the first radiating branch 523 protruding relative to the first body 521 can range from 10 mm to 28 mm inclusive, e.g., the length L4 of the first radiating branch 523 protruding relative to the first body 521 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, etc. In the present embodiment, L4> L2, so that the second radiation portion 54 cannot protrude relative to the end of the first radiation branch 523 but is completely disposed in the U-shaped structure of the first radiation portion 52, ensures a large isolation between the first frequency band of the first radiation portion 52 and the second frequency band of the second radiation portion 54.

The width-directional dimension W1 of the first radiation portion 52 may range from 12 mm to 25 mm (inclusive), for example, the width-directional dimension W1 of the first radiation portion 52 may range from 12 mm, 13 mm, 14 mm, 15 mm, 18 mm, 20 mm, 22 mm, 25 mm, and so on. In the present embodiment, the dimension W1 in the width direction of the first radiation part 52 is understood to be the dimension occupied by the U-shaped bent structure of the first radiation part 52 in the width direction, and as shown in the figure, the dimension W1 in the width direction of the first radiation part 52 is also the dimension of the first main body 521 in the direction.

The width-wise dimension W2 of the first radiating branch 523 can range from 2 mm to 6 mm (inclusive), e.g., the width-wise dimension W2 of the first radiating branch 523 can 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 width dimension W3 of the second radiating branch 543 may range from 1 mm to 3 mm (inclusive), for example, the width dimension W3 of the second radiating branch 543 may be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc. In this embodiment, W3<1/2 × W2.

The distance Ws between the second radiating branch 543 and the feed line 30 may range from 0.5 mm to 2 mm (inclusive), for example, the distance Ws between the second radiating branch 543 and the feed line 30 may range from 0.5 mm, 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, and the like. In the present embodiment, Ws < W3.

Based on the geometric constraint conditions described above, the radiation efficiency of the antenna device 100 can be made higher. It can be seen that the first radiation branch 523 is used for adjusting impedance matching in a low frequency band (first frequency band), and the second radiation branch 543 is used for adjusting impedance matching in a high frequency band (second frequency band).

Referring to fig. 5, fig. 5 shows a vector current distribution diagram of the antenna device 100. The left diagram in fig. 5 shows the vector current distribution when the antenna device 100 operates in the first frequency band (the center frequency point is about 6.5GHz), and it can be seen from the left diagram that the current is mainly distributed on the first radiation branch 523, in the gap between the first radiation branch 523 and the second radiation portion 54, and on the periphery of the first radiation portion 52, that is, the current is mainly distributed on the first radiation branch 523 and on the periphery thereof. Therefore, the low frequency resonance can be adjusted by adjusting the size value of L1. The larger the size value of L1, the longer the current path, the lower the tuned frequency.

The right diagram in fig. 5 shows the vector current distribution when the antenna device 100 operates in the second frequency band (the center frequency is about 8GHz), and it can be seen from the left diagram that the current is mainly distributed on the second radiation branch 543 and in the U-shaped structure of the second radiation portion 54. Therefore, the high frequency resonance can be adjusted by adjusting the size value of L2. The larger the size value of L2, the longer the current path, the lower the tuned frequency, whereas the smaller the size value of L2, the shorter the current path, the higher the tuned frequency. Further, in the present embodiment, by adjusting the size value of L3, impedance matching can be performed for high and low frequencies. Here, L3 is a size of the protrusion of the second radiation branch 543 with respect to the second body 541, and also represents a depth of the U-shaped structure of the second radiation section 54, so that adjusting the size value of L3, that is, adjusting the depth of the U-shaped structure of the second radiation section 54, can adjust an equivalent distributed capacitance and an equivalent distributed inductance of the second radiation section 54, thereby enabling impedance matching for high and low frequencies.

In the embodiment of the present application, the first radiation portion 521 and the second radiation portion 541 have the same linear polarization characteristics when operating, and the antenna device 100 is a dual-frequency co-polarized UWB antenna, and has the same linear polarization characteristics in two frequency band ranges, and 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 greater than or equal to 15dB, which ensures that the anti-interference capability of the antenna device 100 is better. Referring to fig. 6, fig. 6 shows a polarization ratio diagram of the antenna device 100, wherein the upper diagram is a polarization ratio diagram of 6.5GHz, and the lower diagram is a polarization ratio diagram of 8 GHz. As can be seen from fig. 6, the antenna device 100 has the same main polarization component in both frequency band ranges, and has a higher cross polarization ratio in both the E/H plane and the main beam radiation range, where the cross polarization ratio (main polarization component to cross polarization component) is greater than or equal to 15 dB.

Referring to fig. 7, fig. 7 is a schematic cross-sectional view of an antenna device 100 according to an embodiment of the present disclosure. In this embodiment, the antenna device 100 may further include a dielectric substrate 80 and a metal floor 90, the dielectric substrate 80 is disposed between the metal floor 90 and the radiator 50, the metal floor 90 is used for implementing grounding of the antenna device 100 through a grounding portion 70, wherein the grounding portion 70 is configured to electrically connect the antenna device 100 to the metal floor 90. When the ground portion 70 includes the conductive via 72, the conductive via 72 may be perforated through the dielectric substrate 80. In some embodiments, the dielectric substrate 80 may be made of Epoxy resin (FR4Epoxy), and the dielectric substrate 80 has a relative dielectric constant of 4.4 and a dielectric loss tangent of 0.02. In this embodiment, the dielectric substrate 80 and the metal floor 90 may be integrated on a printed circuit board, which may be a multi-layer board (other layer structures are not shown), and the radiator 50 and the feed line 30 of the antenna device 100 may be formed on the surface of the printed circuit board by etching.

Referring to fig. 8, in some embodiments, a void region 92 may be formed on the metal floor 90, and the void region 92 is a material-removed portion of the metal floor 90, so that a gap or a through hole is formed on the metal floor 90 to prevent excessive coupling current from being generated on the metal floor 90, and therefore, the void region 92 can cut off a current path on the metal floor 90, thereby improving electric field distribution of the metal floor 90, and making the antenna device 100 have high radiation efficiency and good pattern characteristics. In some embodiments, when the metal floor 90 and the dielectric substrate 80 are integrated on a printed circuit board, the void region 92 may correspond to a hollow-out region disposed on the printed circuit board, which may penetrate through the printed circuit board along the printed circuit board and along a thickness direction of the printed circuit board, so as to facilitate the preparation and molding of the void region 92.

Referring to fig. 9, fig. 9 is a schematic view illustrating another structure of the antenna apparatus 100 according to the embodiment of the present application, in which the antenna apparatus 100 may further include an end branch 56, and the end branch 56 is connected to the first radiation branch 523. Further, the terminal branch 56 is connected to an end of the first radiation branch 523 away from the first body 521, and is located between the first radiation branch 523 and the second radiation branch 543. The end branches 56 can be one or more, e.g., the antenna device 100 includes at least one end branch 56, at least one end branch 56 connected to at least one first radiating branch 523; as another example, the antenna device 100 includes two end branches 56, and the two end branches 56 are connected to the two first radiating branches 523 in half. By arranging the terminal branch 56, the current distribution of the first radiation portion 52 can be improved, and the radiation efficiency of the first radiation portion 52 can be improved, so that the size of the radiation body can be smaller on the premise that the length of the current path of the antenna device 100 meets the requirement of the working frequency band, and further the size of the whole antenna device 100 can be smaller.

Referring to fig. 10, fig. 10 is a schematic view illustrating another structure of the antenna device 100 according to the embodiment of the present disclosure, in which the first body 521 and the second body 541 are disposed at an interval. The radiator 50 may further include a connection part 58, and the connection part 58 is connected between the first body 521 and the second body 541. By disposing the first body 521 and the second body 541 at an interval, the gap between the first radiating branch 523 and the second radiating portion 54 can have a longer length, and the antenna device 100 can be ensured to have good low-frequency (first frequency band) radiation characteristics.

Referring to fig. 11, fig. 11 is a schematic diagram illustrating another structure of the antenna device 100 in the present embodiment, in which two side edges of the first radiating branch 523 are substantially zigzag. Furthermore, a plurality of notches 5231 are formed in the two side edges of the first radiating branch 523, and the notches 5231 are sequentially arranged at intervals, so that the two side edges of the first radiating branch 523 are substantially in a sawtooth structure. Further, the first radiation branch 523 includes a first side 5233 and a second side 5235 which are opposite to each other, the second side 5235 is opposite to the second radiation portion 54, the plurality of notches 5231 are sequentially arranged on the first side 5233 and the second side 5235 at intervals, and the plurality of notches 5231 on the first side 5233 and the plurality of notches 5231 on the second side 5235 are arranged in a staggered manner, so that a current path can be propagated along a direction defined by a boundary of the notches 5231, thereby further increasing a current path, and further reducing the size of the radiator 50 on the premise of ensuring that the length of the current path in the radiator 50 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 a combination of triangular notches (fig. 11), rectangular notches (fig. 12), 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 size of the notch 5231 recessed with respect to the edge of the first radiating branch 523) should be greater than half of the width-wise dimension W2 of the first radiating branch 523, so that the current path of the first radiating branch 523 is a bent path, and the current path can be elongated.

In the antenna device provided in the embodiment of the present application, a radiator of the antenna device includes a first radiation portion and a second radiation portion; the first radiation part is provided with a bent radiation structure, the second radiation part is provided with a bent radiation structure, and the second radiation part is nested in the bent radiation structure of the first radiation part; the feeder line is a microstrip line feeder line, the feeder line is connected to the second radiation part, and the radiator of the antenna device is formed by adopting the nested bent radiation structure (the first radiation part and the second radiation part), so that the size of the radiator can be smaller on the premise of ensuring that the length of a current path in the radiator meets the requirement of a working frequency band, and further the size of the whole antenna device can be smaller.

Referring to fig. 13, based on the above-mentioned antenna device 100, an embodiment of the present invention further provides an antenna module 500, where the antenna module 500 includes three antenna devices 100, and the three antenna devices 100 are arranged in an array. In some embodiments, the three antenna devices 100 may be arranged in the same plane, for example, the three antenna devices 100 may be arranged on the same dielectric substrate, and may be made in a form of a patch or an etched form, and the like, which is not limited in this embodiment. Because each antenna device 100 is provided with the grounding portion 70, when three antenna devices 100 are arranged in an array, the grounding portion 70 can be located between every two adjacent antenna devices 100, thereby realizing the isolation between a plurality of antenna devices 100 and ensuring that the antenna module 500 has better directional pattern characteristics.

In this embodiment, the three antenna devices 100 may include a first sub-antenna device 1001, a second sub-antenna device 1003, and a third sub-antenna device 1005. The first sub-antenna device 1001 and the second sub-antenna device 1003 are arranged in parallel along a first direction Y, and the second sub-antenna device 1003 and the third sub-antenna device 1005 are arranged in parallel along a second direction X, wherein the second direction X is different from the first direction Y, so that electromagnetic incoming waves received by the first sub-antenna device 1001, the second sub-antenna device 1003 and the third sub-antenna device 1005 can be applied to calculating azimuth angles in different directions. For example, when the antenna module 500 receives an electromagnetic wave from an external signal source, the antenna module 500 may be configured to determine an angle (e.g., a pitch angle) of the signal source relative to the antenna module 500 in a vertical direction according to a phase difference and a time difference calculated by the electromagnetic waves received by the first sub-antenna device 1001 and the second sub-antenna device 1003, and the antenna module 500 may be further configured to determine an angle (e.g., a steering angle) of the signal source relative to the antenna module 500 in a horizontal direction according to a phase difference and a time difference of the electromagnetic waves received by the second sub-antenna device 1003 and the third sub-antenna device 1005, so that the antenna module 500 can accurately locate the external signal source. Further, in the above-mentioned relative angle measurement in two directions, the second sub-antenna device 1003 is multiplexed, so that the three antenna devices arranged in an array can be fully utilized, and the size of the antenna module 500 can be ensured to be small.

In this embodiment, the first direction Y may be perpendicular to the second direction X, and the first sub-antenna device 1001, the second sub-antenna device 1003, and the third sub-antenna device 1005 may be arranged in a regular rectangular array. In the present embodiment, "array arrangement" should be broadly understood as that the mutual relationship between the positions of three antenna devices 100 (for example, the positions of the three antenna devices may be represented by coordinates of a geometric center) is approximately in an array relationship, but the specific structure of each antenna device 10 is not strictly identical in the array, that is, each antenna device 100 may be disposed on the array coordinates thereof, but the positions of the radiators, the feeder positions, or the feeding points, etc. in these antenna devices 100 are not necessarily identical, for example, the feeder of the first sub-antenna device 1001 may be connected above or to the left of the radiator, and the feeder of the second sub-antenna device 1003 may be connected below or to the right of the radiator, etc., which is not taken as an example in this specification.

The following will describe a positioning process of the antenna module 500 for an external signal source by taking the first sub-antenna device 1001 and the second sub-antenna device 1003 as an example.

Referring to fig. 14, a signal source a transmits an electromagnetic wave or pulse, and a path of a signal from the signal source a to a first sub-antenna device 1001 is longer than a path to a second sub-antenna device 1003, so that a Path Difference (PDOA) exists between the signal transmitted from the signal source a to the first sub-antenna device 1001 and the second sub-antenna device 1003, and a phase difference exists. The path difference may be characterized by a time difference of arrival (TDOA) for the signals at the first and second

sub-antenna devices

1001 and 1003. According to the arrival angle θ of the signal at the first sub-antenna device 1001₁Angle of arrival θ to the second sub-antenna device 1003₂And the functional relationship between the angle of arrival and the phase difference, an azimuth angle α (AOA) of the signal source a in the vertical direction with respect to the antenna module 500 can be calculated, and the specific conversion process is listed as follows:

θ₁≈θ₂≈θ(D＞＞＞λ)

f＝6.25-8.25GHz

λ＝36.4-48mm

λ/2＝18.2-24mm

Antenna Spacing：

d_max＝18mm

Extra distance of path#1：

d₁＝d cosθ＝d sinα

Extra flying time of path#1：

Phase Difference of Arrival：

Anfgle of Arrival：

similarly, when the azimuth angle (e.g., steering angle) of the signal source a in the horizontal direction with respect to the antenna module 500 is calculated by using the phase difference and the time difference of the electromagnetic incoming waves received by the second sub-antenna device 1003 and the third sub-antenna device 1005, a similar calculation method is adopted, and details are not repeated in this specification. Therefore, in the embodiment of the present application, the antenna module 500 can position the external signal source a more accurately through the electromagnetic incoming waves received by any two antenna devices 100 of the three antenna devices 100. It should be understood that in the implementation of the present application, the antenna module 500 may further include a processor (not shown in the figure) for performing the above calculation process.

Referring to fig. 13 again, in the present embodiment, the antenna module 500 may further include a bluetooth antenna 1007, and the bluetooth antenna 1007 is configured to transmit and receive bluetooth signals under the action of the excitation current. The bluetooth antenna 1007 is used for interconnecting with other electronic devices, for example, when the antenna module 500 is applied to a protective case of an electronic device, the antenna module can be used to be sleeved outside the electronic device to protect the electronic device, and meanwhile, the bluetooth antenna 1007 can be used for interconnecting with the electronic device to allow the electronic device to communicate with an external signal source via the antenna module 500. When the external signal source is a tag antenna, the tag antenna can be arranged on smart home equipment (such as a television, an air conditioner, a refrigerator and the like), the antenna module 500 can be interconnected with the tag antenna, and meanwhile, by means of the interconnection between the bluetooth antenna 1007 and the electronic equipment, the interconnection communication between the electronic equipment and the smart home equipment can be realized, the interconnection is not limited to a gateway and a server, the networking connection process is simple, and the operation is convenient.

In the antenna module 500 provided in this embodiment, three antenna devices 100 arranged in an array are disposed, wherein two antenna devices 100 can be respectively used for receiving electromagnetic incoming waves transmitted by an external signal source, so that the antenna module 500 can calculate the direction of the external signal source relative to the antenna module 500 by using the phase difference and the time difference of the electromagnetic incoming waves received by the two antenna devices 100, thereby making it possible for the antenna module 500 to locate the position of the external signal source. The electromagnetic incoming waves received by any two antenna devices 100 of the three antenna devices 100 can make the positioning of the antenna module 500 to the external signal source more accurate.

For example, the three antenna devices 100 may be a first sub-antenna device 1001, a second sub-antenna device 1003 and a third sub-antenna device 1005 which are respectively arranged in an array, and the first sub-antenna device 1001, the second sub-antenna device 1003 and the third sub-antenna device 1005 are configured to respectively receive electromagnetic incoming waves from the same signal source. In practical applications, the antenna module 500 may include a processor 1009, where the processor 1009 is electrically connected to the three antenna devices 100, and may be configured to determine an angle (e.g., a pitch angle) of the signal source in a vertical direction with respect to the antenna module 500 according to the phase difference and the time difference of the electromagnetic incoming waves received by the first sub-antenna device 1001 and the second sub-antenna device 1003, and the processor 1009 may be further configured to determine an angle (e.g., a steering angle) of the signal source in a horizontal direction with respect to the antenna module 500 according to the phase difference and the time difference of the electromagnetic incoming waves received by the second sub-antenna device 1003 and the third sub-antenna device 1007. Therefore, the antenna module 500 of the present embodiment utilizes the three antenna devices 100 arranged in an array, so that the positioning of the external signal source is possible and the positioning of the external signal source is more accurate. When the external signal source is a tag antenna, it can be determined that the antenna module 500 can be interconnected with the tag antenna under a specific attitude angle, for example, when an azimuth angle of the tag antenna relative to the antenna module 500 is within a predetermined range (for example, when the antenna module 500 points to the tag antenna at a predetermined angle), the two parties can communicate with each other, and therefore, the more accurate the positioning and angle measurement of the tag antenna, the more beneficial to determining the requirement for interconnection communication between the two parties, and the situation that misconnection or connection cannot be established can be effectively avoided.

Referring to fig. 15, based on the antenna device 100, the embodiment of the present application 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 shell of the electronic device and may also serve as a housing 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 body 2003, the antenna device 2001 is provided on the housing body 2003, and the configuration, parameters, and the like of the antenna device 2001 of the present embodiment can be substantially the same as those of the antenna device 100 of 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, so 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. 16, an electronic device 400 is further provided in the embodiments of the present application, 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 a display screen 403 and an antenna device 405 provided on the housing 401. In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inside", and the like indicate orientations or positional relationships based on those shown in the drawings, and are simply used for convenience of description of the present application, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In this embodiment, the display screen 403 generally includes a display panel, and may also include a circuit and the like for responding to a touch operation performed on the display panel. The Display panel may be a Liquid Crystal Display (LCD) panel, and in some embodiments, the Display panel may also be a touch screen Display. In the description herein, references to the description of "one embodiment," "some embodiments," or "other embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

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 have a combination of any one or more features of the above antenna devices 100, and 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.

Of course, in this embodiment, the electronic device 500 may also include the antenna module 500 provided in the above embodiments, the antenna module 500 may be integrated in the housing 401 or disposed in the housing 401, for example, the antenna module 500 may be disposed on the middle frame 4013, may also be disposed on the rear housing 4011, may also be disposed on a main board of the electronic device 400, or disposed on other electronic devices and accommodated in the housing 401, which is not limited in this specification.

It is noted that, 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit 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 still 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 corresponding technical solutions in the embodiments of the present application.

Claims

1. An antenna device is characterized by comprising a feed source, a radiator and a feeder line connected between the radiator and the feed source, wherein the radiator comprises a first radiation part and a second radiation part; the first radiating part is provided with a bent radiating structure, the second radiating part is provided with a bent radiating structure, and the second radiating part is nested in the bent radiating structure of the first radiating part; the feeder line is a microstrip line feeder line and is connected to the second radiation part;

the feed source is configured to feed an excitation current to the radiator via the feed line, so that the first radiation portion radiates a signal of a first frequency band, and the second radiation portion radiates a signal of a second frequency band, wherein the second frequency band is different from the first frequency band, and the antenna device is an ultra-wideband antenna.

2. The antenna device of claim 1, wherein the first radiating portion includes a first body and two first radiating branches, the two first radiating branches being disposed at an interval, the first body being connected between the two first radiating branches; the second radiation part is arranged between the two first radiation branches and connected to the first main body.

3. The antenna device according to claim 2, wherein the second radiating portion includes a second main body and two second radiating branches, the two second radiating branches are disposed at an interval, and the second main body is connected between the two second radiating branches; the second body is connected to the first body, and the feeder line is connected to the second body.

4. The antenna device according to claim 3, wherein two of the second radiating branches are located between two of the first radiating branches, and the two first radiating branches and the two second radiating branches are juxtaposed in the same direction; the second main body is connected to one end of the second radiation, which is directly close to the first main body, and the feeder line is arranged between the two second radiation branches and is parallel to the two second radiation branches.

5. The antenna device of claim 3, wherein the second body is spaced apart from the first body, the radiator further comprising a connection portion connected between the second body and the first body.

6. The antenna device of claim 2, wherein the radiator further comprises at least one end branch, at least one of the end branches being connected to an end of at least one of the first radiating branches distal from the first body.

7. The antenna apparatus of claim 2, wherein the first radiating branch comprises opposing first and second sides, the second side opposite the second radiating portion; the first side and the second side all is equipped with a plurality of breachs, and is a plurality of the breach interval sets up, a plurality of breachs on the first side with a plurality of breachs on the second side are the setting of staggering mutually.

8. The antenna device of claim 1, further comprising a ground portion disposed around an outer periphery of the radiator, the ground portion adapted to be connected to a metal floor of the antenna device.

9. The antenna device according to claim 8, wherein the antenna device further comprises a dielectric substrate and a metal floor, the dielectric substrate being disposed between the antenna device and the metal floor; the grounding part comprises conductive through holes which are arranged on the periphery of the metal floor in an array mode, and the conductive through holes penetrate through the dielectric substrate and are connected to the metal floor.

10. The antenna device according to any one of claims 1 to 9, wherein the signal of the first frequency band and the signal of the second frequency band are both ultra wide bandwidth signals, a center frequency point of the first frequency band is 6.5GHz, and a center frequency point of the second frequency band is 8 GHz; the first radiation part and the second radiation part have the same linear polarization characteristic when working.

11. An antenna module comprising three antenna devices according to any of claims 1-10, wherein the three antenna devices are arranged in an array.

12. The antenna module of claim 11, wherein the antenna module further comprises a processor;

the three antenna devices are respectively a first sub-antenna device, a second sub-antenna device and a third sub-antenna device, and the first sub-antenna device and the second sub-antenna device are arranged in parallel along a first direction; the second sub-antenna device and the third sub-antenna device are arranged in parallel along a second direction different from the first direction;

the first sub-antenna device, the second sub-antenna device and the third sub-antenna device are configured to receive electromagnetic incoming waves from the same signal source respectively; the processor is configured to determine a pitch angle of the signal source relative to the antenna device according to the electromagnetic incoming waves received by the first sub-antenna device and the second sub-antenna device, and is configured to determine a steering angle of the signal source relative to the antenna device according to the second sub-antenna device and the third sub-antenna device.

13. A housing comprising a housing body and an antenna device as claimed in any one of claims 1 to 10, the antenna device being provided to the housing body.

14. An electronic device, characterized in that it comprises a display screen and an antenna device according to any one of claims 1 to 10.

15. The electronic device of claim 14, further comprising a housing, the display screen coupled to the housing, the antenna apparatus integrated into the housing.