CN117353033A - Antenna structure, antenna module and terminal equipment - Google Patents

Abstract

The disclosure provides an antenna structure, an antenna module and terminal equipment, and relates to the technical field of antennas. The antenna structure comprises: the radiating body, the parasitic branch, the feed point, the first switch point and the second switch point; the radiator comprises a first radiation branch located at a first side part of the terminal equipment and a second radiation branch located at a second side part of the terminal equipment; the feed point and the first switching point are positioned on the first radiation branch, and the second switching point is positioned at the fourth end part; the parasitic branch is located on at least one of the first side portion and the second side portion, one end of the parasitic branch can be respectively coupled with the first end portion or the fourth end portion, and the other end of the parasitic branch is grounded. The antenna structure disclosed by the invention has good OTA performance in a BHHR mode and a BHHL mode.

Description

Antenna structure, antenna module and terminal equipment

Technical Field

The disclosure relates to the field of antenna technologies, and in particular, to an antenna structure, an antenna module and a terminal device.

Background

With the continuous development of 5G communication, the frequency bands required by the terminal device are increasing, and almost all the frequency bands including 2, 3, 4 and 5G are needed, so as to meet the frequency band coverage requirement of the terminal device, and meet the development trend of thinning and miniaturization of the terminal device, and a broadband antenna structure is generally used.

However, the broadband antenna structure of the related art has poor performance in the OTA (Over The Air) test in BHHR (Beside Head Hand Right) and BHHL (Beside Head Hand Left) modes, i.e., the right-head right-hand mode and the left-head left-hand mode, and cannot meet the market demand.

Disclosure of Invention

The disclosure provides an antenna structure, an antenna module and terminal equipment, which can solve the problem that the OTA performance of a broadband antenna structure in a BHHR mode and a BHHL mode is poor.

The technical scheme is as follows:

in one aspect, an antenna structure is provided, the antenna structure comprising: the radiating body, the parasitic branch, the feed point, the first switch point and the second switch point;

the radiator comprises a first radiation branch located at a first side part of the terminal equipment and a second radiation branch located at a second side part of the terminal equipment, wherein the first side part and the second side part are adjacent and intersected to form a corner part;

the first radiating branch comprises a first end and a second end, and the second radiating branch comprises a third end and a fourth end; the first end is positioned at the first side part, the fourth end is positioned at the second side part, and the second end and the third end are connected to the corner part;

the feed point is located on the first radiating branch between the first end and the second end, the first switching point is located at the corner, and the second switching point is located at the fourth end;

the parasitic branch is positioned on at least one of the first side part and the second side part, one end of the parasitic branch can be respectively coupled with the first end part or the fourth end part, and the other end of the parasitic branch is grounded.

In some embodiments, the length of the first radiating branch between the feed point and the first end is a, the length of the first radiating branch between the feed point and the second end is B, and the length of the second radiating branch is C, satisfying a=b+c.

In some embodiments, the length C of the second radiating branch ranges from 26mm to 30mm.

In some embodiments, the parasitic dendrite is the same direction of extension as the first or second radiating dendrite;

the length of the parasitic branch is 2mm-6mm.

In some embodiments, the length of the parasitic dendrites is inversely proportional to the radiation frequency.

In some embodiments, the parasitic dendrite includes a first parasitic dendrite including a fifth end part and a sixth end part;

the first parasitic branch is positioned at the first side part and has the same extension direction as the first radiation branch;

the fifth end is coupled with the first end, and the sixth end is grounded.

In some embodiments, the parasitic dendrite includes a second parasitic dendrite including a seventh end and an eighth end;

the second parasitic branch is positioned at the second side part and has the same extension direction as the second radiation branch;

the seventh end is coupled to the fourth end, and the eighth end is grounded.

In another aspect, an antenna module is provided, the antenna module including an antenna structure described in the present disclosure, and a feed unit, a first tuning unit, and a second tuning unit;

the feed unit is electrically connected with the feed point; one end of the first tuning unit is electrically connected with the first switch point, and the other end of the first tuning unit is grounded; one end of the second tuning unit is electrically connected with the second switch point, and the other end of the second tuning unit is grounded.

In some embodiments, the feed unit includes a first capacitive element, a second capacitive element, a first inductive element, and a feed source;

the first end of the first capacitive element is electrically connected with the feeding point, the second end of the first capacitive element is electrically connected with the first end of the first inductive element, the first end of the second capacitive element and the feeding source respectively, and the second end of the first inductive element and the second end of the second capacitive element are grounded respectively.

In some embodiments, the first tuning unit includes a third capacitive element, a fourth capacitive element, a fifth capacitive element, a second inductive element, a third inductive element, a fourth inductive element, a first switch, a second switch, a third switch, and a fourth switch;

the first end of the third capacitive element is electrically connected with the first switch point, and the second end of the third capacitive element is electrically connected with the first end of the second inductive element, the first end of the fourth capacitive element, the first end of the third inductive element, the first end of the fifth capacitive element and the first end of the fourth inductive element respectively;

the second end of the second inductance element is grounded, the second end of the fourth capacitance element is grounded through the first switch, the second end of the third inductance element is grounded through the second switch, the second end of the fifth capacitance element is grounded through the third switch, and the second end of the fourth inductance element is grounded through the fourth switch.

In some embodiments, the second tuning unit includes a sixth capacitive element, a single pole four throw switch, a fifth inductive element, a sixth inductive element, a seventh inductive element, an eighth inductive element, and a ninth inductive element;

the first end of the sixth capacitive element is electrically connected with the second switch point, the second end of the sixth capacitive element is electrically connected with the first end of the fifth inductive element and the input end of the single-pole four-throw switch respectively, and four output ends of the single-pole four-throw switch are grounded through the sixth inductive element, the seventh inductive element, the eighth inductive element and the ninth inductive element respectively.

In another aspect, a terminal device is provided, and in some embodiments, the terminal device includes an antenna structure described in the disclosure, or the antenna module described in the disclosure.

The beneficial effects that this disclosure provided technical scheme brought include at least:

the antenna structure comprises a radiator, a parasitic branch, a feed point, a first switch point and a second switch point, wherein the radiator comprises a first radiation branch positioned at a first side part of a terminal device and a second radiation branch positioned at a second side part of the terminal device, the parasitic branch is positioned at the first side part and/or the second side part and can be respectively coupled with the first radiation branch or the second radiation branch, so that the radiator can realize full coverage of low, medium, high and Sub6G frequency bands, and the relative positions of the two switch points and the feed point are benefited.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a schematic structural diagram of an antenna structure provided in an embodiment of the present disclosure;

FIG. 2 is a graph comparing radiation efficiency of free space, BHHR mode, and BHHL mode of an antenna structure provided by an embodiment of the present disclosure in the B28 band;

FIG. 3 is a graph comparing radiation efficiency of free space, BHHR mode, and BHHL mode of an antenna structure provided by an embodiment of the present disclosure in the B8 band;

fig. 4 is a schematic structural diagram of an antenna module according to an embodiment of the disclosure;

fig. 5 is a schematic structural view of a power feeding unit provided by an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a first tuning unit provided by an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a second tuning unit provided by an embodiment of the present disclosure;

fig. 8 is a schematic diagram of a profit status of an antenna module according to an embodiment of the disclosure;

fig. 9 is a schematic diagram of current distribution of an antenna module provided in an embodiment of the present disclosure in a B28 band;

fig. 10 is a schematic diagram of current distribution of an antenna module provided in an embodiment of the present disclosure in a B8 frequency band;

fig. 11 is a schematic diagram of current distribution of an antenna module provided in an embodiment of the present disclosure in a B5 frequency band;

fig. 12 is a schematic diagram of current distribution of an antenna module provided in an embodiment of the present disclosure in a B3 band;

fig. 13 is a schematic diagram of current distribution of an antenna module provided in an embodiment of the present disclosure in a B1 frequency band;

fig. 14 is a schematic diagram of current distribution of an antenna module provided in an embodiment of the present disclosure in a B41 frequency band;

fig. 15 is a schematic diagram of current distribution of an antenna module provided in an embodiment of the present disclosure in a B40 frequency band;

fig. 16 is a schematic diagram of current distribution of an antenna module provided in an embodiment of the present disclosure in an N78 frequency band;

fig. 17 is a simulation waveform diagram of an antenna module provided in an embodiment of the present disclosure.

Reference numerals in the drawings are respectively expressed as:

100. a first side portion; 200. a second side portion; 300. corner parts;

1. a radiator; 11. a first radiation branch; 111. a first end; 112. a second end; 12. a second radiation branch; 121. a third end; 122. a fourth end;

2. parasitic branches; 21. a first parasitic branch; 211. a fifth end; 212. a sixth end; 22. a second parasitic branch; 221. a seventh end; 222. an eighth end;

3. a feeding point;

4. a first switching point;

5. a second switching point;

6. a power feeding unit; 61. a first capacitive element; 62. a second capacitive element; 63. a first inductance element; 64. A power supply;

7. a first tuning unit; 71. a third capacitive element; 72. a fourth capacitive element; 73. a fifth capacitive element; 74. a second inductance element; 75. a third inductance element; 76. a fourth inductance element; 77. a first switch; 78. a second switch; 79. a third switch; 710. a fourth switch;

8. a second tuning unit; 81. a sixth capacitive element; 82. a single pole four throw switch; 821. an input end; 822. A first output terminal; 823. a second output terminal; 824. a third output; 825. a fourth output terminal; 83. A fifth inductance element; 84. a sixth inductance element; 85. a seventh inductive element; 86. an eighth inductance element; 87. and a ninth inductance element.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present disclosure and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Unless defined otherwise, all technical terms used in the embodiments of the present disclosure have the same meaning as commonly understood by one of ordinary skill in the art.

The bandwidth of an antenna refers to the frequency range in which the main performance parameters of the antenna, such as gain, pattern, input impedance, etc., meet the design criteria. An antenna whose directivity, impedance, and polarization characteristics remain almost unchanged over a wide band is called a wideband antenna.

OTA (Over The Air) is a test that verifies the transmit power and receive performance of a mobile communication air interface. The method focuses on the test of the radiation performance of the whole machine, belongs to a three-dimensional test, and can reflect the radiation performance of the whole machine.

The wide-band antenna used in the related technology is generally shown to have larger radiation efficiency attenuation amplitude (about 8 dB) in a BHHR mode and a BHHL mode, and has obvious unbalance phenomenon, so that the communication quality of terminal equipment is influenced, and the market competitiveness of products is reduced.

Therefore, the antenna structure provided by the disclosure has the advantages that the radiator can realize the full coverage of low, medium, high and Sub6G frequency bands, and the relative positions of the two switch points and the feed point are benefited, the OTA performance of the BHHR mode and the BHHL mode under the working condition of the low-frequency band is good, compared with the radiation efficiency attenuation of the prior art, the performance difference of the BHHR mode and the BHHL mode is controlled within 1.5dB, the working performance is balanced, and the market demand can be better met.

For the purposes of clarity, technical solutions and advantages of the present disclosure, the following further details the embodiments of the present disclosure with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an antenna structure provided in an embodiment of the present disclosure.

In one aspect, as shown in fig. 1, the present embodiment provides an antenna structure, where the antenna structure includes: radiator 1, parasitic branch 2, feed point 3, first switching point 4 and second switching point 5.

The radiator 1 comprises a first radiating branch 11 located at a first side 100 of the terminal device and a second radiating branch 12 located at a second side 200 of the terminal device, the first side 100 and the second side 200 being adjacent and intersecting to form a corner 300.

The first radiating branch 11 comprises a first end 111 and a second end 112, and the second radiating branch 12 comprises a third end 121 and a fourth end 122; the first end 111 is located at the first side 100, the fourth end 122 is located at the second side 200, and the second end 112 and the third end 121 are connected to the corner 300; the feeding point 3 is located on the first radiating branch 11 between the first end 111 and the second end 112, the first switching point 4 is located at the corner 300, and the second switching point 5 is located at the fourth end 122.

The parasitic branch 2 is located on at least one of the first side 100 and the second side 200, and one end of the parasitic branch 2 can be coupled to the first end 111 or the fourth end 122, respectively, and the other end is grounded.

The antenna structure of the embodiment includes a radiator 1, a parasitic branch 2, a feed point 3, a first switch point 4 and a second switch point 5, where the radiator 1 includes a first radiating branch 11 located at a first side 100 of a terminal device and a second radiating branch 12 located at a second side 200 of the terminal device, the parasitic branch 2 is located at the first side 100 and/or the second side 200 and can be coupled with the first radiating branch 11 or the second radiating branch 12 respectively, so that the radiator 1 can realize full coverage of low, medium, high and Sub6G frequency bands, and benefits from the relative positions of the two switch points and the feed point 3, and compared with the prior art, the antenna structure of the embodiment has good OTA performance of BHHR mode and BHHL mode under the working condition of low frequency band, has smaller attenuation of radiation efficiency, and the performance difference of BHHR mode and BHHL mode is controlled within 1.5dB, has balanced working performance, and can better meet market demands.

In some possible implementations, the first side 100 corresponds to a side frame of the terminal device, and the second side 200 corresponds to a head frame of the terminal device (the top or the bottom of the terminal device is collectively referred to as a head herein), so that the radiator 1 is disposed on the side and the head of the terminal device by using the first radiation branch 11 and the second radiation branch 12, respectively, and signal radiation is performed by using different radiation branches in the BHHR mode or the BHHL mode, so that the antenna structure is shielded by the hands and the head as little as possible, and it can be ensured that the terminal device can maintain better radiation efficiency in the BHHR mode or the BHHL mode.

As shown in connection with fig. 1, in some embodiments, the length of the first radiating branch 11 between the feeding point 3 and the first end 111 is a, the length of the first radiating branch 11 between the feeding point 3 and the second end 112 is B, and the length of the second radiating branch 12 is C, satisfying a=b+c.

The length of the first radiating branch 11 between the feeding point 3 and the first end 111 is equal to the sum of the length B of the first radiating branch 11 and the length C of the second radiating branch 12 between the feeding point 3 and the second end 112, so that the feeding can be ensured as the center of the whole radiator 1, so that each low frequency band has another symmetrical but weaker current mode except the main current mode, so that the whole current distribution is not held by the hand, and the hand performance is improved.

The antenna structure of the embodiment has better performance balance in the BHHR mode or the BHHL mode.

In some embodiments, the length C of the second radiating stub 12 ranges from 26mm to 30mm.

The length C of the second radiation branch 12 in this embodiment determines the distance between the first switching point 4 and the second switching point 5, and the distance between the first switching point 4 and the second switching point 5 has an important effect on the radiation performance of the intermediate frequency band and the high frequency band, and is applied to the operation scene of exciting the intermediate frequency band and the high frequency band.

Further, the length C of the second radiating branch 12 has a value of 29mm, which can meet the excitation requirements of the intermediate frequency and the high frequency band.

As shown in connection with fig. 1, in some embodiments, the parasitic branch 2 extends in the same direction as the first radiation branch 11 or the second radiation branch 12; the length of the parasitic branch 2 is 2mm-6mm.

The parasitic branch 2 of the embodiment can influence the performance of the antenna structure in the N77, N78 and N79 frequency bands, the length of the parasitic branch 2 is controlled to be 2mm-6mm, and the radiation requirement of the frequency bands can be met.

Further, the length of the parasitic branch 2 is inversely proportional to the radiation frequency, i.e. as the radiation frequency increases, the length of the parasitic branch 2 becomes smaller.

Illustratively, if the radiation frequency of the operating band is higher, the length of the parasitic branch 2 is reduced, and if the radiation frequency of the operating band is lower, the length of the parasitic branch 2 is increased.

As shown in connection with fig. 1, in some embodiments, the parasitic branch 2 includes a first parasitic branch 21, the first parasitic branch 21 including a fifth end 211, a sixth end 212; the first parasitic branch 21 is located at the first side 100 and has the same extension direction as the first radiating branch 11; the fifth end 211 is coupled to the first end 111, and the sixth end 212 is grounded.

The first parasitic branch 21 of the embodiment enables the antenna structure to cover the N77, N78 and N79 frequency bands, and improves the performance of the antenna structure.

As shown in connection with fig. 1, in some embodiments, the parasitic branch 2 includes a second parasitic branch 22, the second parasitic branch 22 including a seventh end 221 and an eighth end 222; the second parasitic branch 22 is located at the second side 200 and has the same extension direction as the second radiating branch 12; the seventh end 221 is coupled to the fourth end 122 and the eighth end 222 is grounded.

The second parasitic branch 22 of the embodiment enables the antenna structure to cover the N77, N78 and N79 frequency bands, and improves the performance of the antenna structure.

In some possible implementations, the second parasitic stub 22 is located at the bottom of the terminal device, and the grounding is implemented by using the inherent structure of the USB port, the earphone port, and the like at the bottom of the terminal device.

Referring to fig. 2, fig. 2 is a graph showing radiation efficiency of a free space, a BHHR mode and a BHHL mode of an antenna structure provided by the embodiment of the present disclosure in the B28 frequency band, where an abscissa indicates a working frequency in MHz, and an ordinate indicates radiation efficiency in dB; b28 is 700Mhz, the uplink frequency is 703MHz-748MHz, and the downlink frequency is 758MHz-803MHz.

As can be seen from fig. 2, in the operating frequency range of 700Mhz-800Mhz, the radiation efficiency of the antenna structure of the present embodiment in the BHHR mode and the BHHL mode is reduced less than that in the free space mode, and is basically controlled within 6dB (the reduced amplitude is about 8dB in the related art); in addition, the radiation efficiency curves in the BHHR mode and the BHHL mode are overlapped at a plurality of positions, which shows that the radiation performance in the two modes is better in balance.

Referring to fig. 3, fig. 3 is a graph showing radiation efficiency of free space, BHHR mode and BHHL mode of the antenna structure in the B8 frequency band according to the embodiment of the present disclosure, wherein the abscissa in the graph is the working frequency, the unit is MHz, and the ordinate is the radiation efficiency, the unit is dB; b8 is a frequency band of 900Mhz, the uplink frequency is 880MHz-915MHz, and the downlink frequency is 925MHz-960MHz.

As can be seen from fig. 3, in the operating frequency range of 800Mhz-900Mhz, the radiation efficiency curves of the antenna structure of the present embodiment in the BHHR mode and the BHHL mode have smaller radiation efficiency degradation compared with the free space mode, and are substantially controlled within 6dB (about 8dB for the related art); in addition, radiation efficiency curves in the BHHR mode and the BHHL mode are overlapped at least once, which shows that the radiation performance in the two modes is better in balance.

On the other hand, as shown in connection with fig. 4, the present embodiment provides an antenna module including the antenna structure of the present disclosure, and a feeding unit 6, a first tuning unit 7, and a second tuning unit 8.

The feeding unit 6 is electrically connected with the feeding point 3; one end of the first tuning unit 7 is electrically connected with the first switch point 4, and the other end is grounded; one end of the second tuning unit 8 is electrically connected to the second switch point 5, and the other end is grounded.

The antenna module of this embodiment, including the antenna structure of this disclosure, has the whole technical effects of this disclosure antenna structure.

The antenna module can realize full coverage of low, medium, high and Sub6G frequency bands through the first tuning unit and the second tuning unit 8, and the antenna module of the embodiment can realize tuning of two switching points through the first tuning unit 7 and the second tuning unit 8, so that the antenna module has good OTA performance in a BHHR mode and a BHHL mode under the working condition of the low-frequency band.

As shown in connection with fig. 5, in some embodiments, the feeding unit 6 includes a first capacitive element 61, a second capacitive element 62, a first inductive element 63, and a feeding source 64; the first end of the first capacitive element 61 is electrically connected to the feeding point 3, the second end is electrically connected to the first end of the first inductive element 63, the first end of the second capacitive element 62 and the feeding source 64, and the second end of the first inductive element 63 and the second end of the second capacitive element 62 are grounded.

As shown in connection with fig. 6, in some embodiments, the first tuning unit 7 includes a third capacitive element 71, a fourth capacitive element 72, a fifth capacitive element 73, a second inductive element 74, a third inductive element 75, a fourth inductive element 76, a first switch 77, a second switch 78, a third switch 79, and a fourth switch 710.

The first end of the third capacitive element 71 is electrically connected to the first switching point 4, and the second end is electrically connected to the first end of the second inductive element 74, the first end of the fourth capacitive element 72, the first end of the third inductive element 75, the first end of the fifth capacitive element 73 and the first end of the fourth inductive element 76, respectively.

The second end of the second inductance element 74 is grounded, the second end of the fourth capacitance element 72 is grounded through the first switch 77, the second end of the third inductance element 75 is grounded through the second switch 78, the second end of the fifth capacitance element 73 is grounded through the third switch 79, and the second end of the fourth inductance element 76 is grounded through the fourth switch 710.

In some possible implementations, the first switch 77, the second switch 78, the third switch 79, and the fourth switch 710 are integrally designed.

As shown in connection with fig. 7, in some embodiments, the second tuning unit 8 includes a sixth capacitive element 81, a single pole four throw switch 82, a fifth inductive element 83, a sixth inductive element 84, a seventh inductive element 85, an eighth inductive element 86, and a ninth inductive element 87.

The first end of the sixth capacitive element 81 is electrically connected to the second switching point 5, the second end is electrically connected to the first end of the fifth inductive element 83 and the input terminal 821 of the single-pole four-throw switch 82, and the four output terminals of the single-pole four-throw switch 82 are grounded through the sixth inductive element 84, the seventh inductive element 85, the eighth inductive element 86 and the ninth inductive element 87, respectively.

Illustratively, the four outputs of the single pole, four throw switch 82 are a first output 822, a second output 823, a third output 824, and a fourth output 825, respectively, the first output 822 being coupled to the sixth inductive element 84, the second output 823 being coupled to the seventh inductive element 85, the third output 824 being coupled to the eighth inductive element 86, and the fourth output 825 being coupled to the ninth inductive element 87.

The antenna module of the embodiment can realize full coverage of low, medium, high and Sub6G frequency bands by utilizing feed and switch control, and meets the communication requirement of terminal equipment.

Illustratively, the antenna module achieves full coverage of the low, medium, high and Sub6G frequency bands by configuring the first tuning unit 7 and the second tuning unit 8 according to table 1.

The configuration of the first tuning unit 7 is specifically represented by the conducting states of the first switch 77, the second switch 78, the third switch 79 and the fourth switch 710, on represents conducting, and off represents non-conducting.

The configuration of the second tuning unit 8 is embodied as the conductive state of the input terminal 821 and the first output terminal 822, the second output terminal 823, the third output terminal 824 and the fourth output terminal 825 of the single pole four throw switch 82, respectively, on means conductive and off means non-conductive.

Table 1 first tuning unit and second tuning unit configuration table

In combination with the configuration of the first tuning unit 7 and the second tuning unit 8 shown in table 1, the antenna module of the present disclosure can achieve full coverage of low, medium, high and Sub6G frequency bands.

Referring to fig. 8, fig. 8 is a schematic diagram of a profit state caused by introducing a truth table of software configuration of ASM2 into an antenna module according to an embodiment of the present disclosure, in which a low-frequency sum is in a form of separating Tx and Rx frequency bands, a dashed box in the figure indicates a bandwidth of the antenna module, and in the dashed box indicates in-band, on both left and right sides of the dashed box, the efficiency of the Tx frequency band is improved by about 1dB compared with the original efficiency, as shown by a left arrow, and the efficiency of the Tx frequency band is improved by about 1dB compared with the original efficiency, as shown by a right arrow.

Referring to fig. 9-11, fig. 9-11 show current distribution of the antenna module in the B28, B8 and B5 bands according to the embodiment of the present disclosure, wherein the main radiation mode of the B28 band is the lower half branch 1/4 wavelength mode, but the upper half branch also participates in part of radiation; the main radiation mode of the B8 frequency band is a 1/4 wavelength mode of the upper half branch, but the upper half branch also participates in partial radiation; the B5 band jointly produces radiation through upper and lower branches.

Therefore, the three frequency bands of the low frequency benefit from the special position of the feeding point 3, and the corresponding current mode can be provided on the whole radiator 1, so that the low frequency has a better radiation mode when the radiator is held by the left hand or the right hand.

Referring to fig. 12-16, fig. 12-16 show current distribution of the antenna module provided in the embodiment of the present disclosure in the B3, B1, B41, B40 and N78 frequency bands, wherein the current mode of the B3 frequency band is complex, and the main radiation mode is a 1/4 wavelength mode from the feeding point 3 to the end of the upper half branch; the main radiation mode of the B1 frequency band is a 1/4 wavelength mode of the upper half branch; the main radiation mode of the B40 frequency band is a 1/2 wavelength mode of the upper half branch; the main radiation mode of the B41 frequency band is the whole wavelength mode of the whole radiation arm; the N78 frequency band is the 3/4 wavelength mode of the upper half branch and the parasitic branch 2 radiation.

Referring to fig. 17, fig. 17 is a simulation waveform diagram of an antenna module provided in an embodiment of the present disclosure, and it can be seen from the figure that the antenna module has waveforms covering different frequency bands in different switch states, so as to realize full coverage of low, medium, high and Sub6G frequency bands.

In another aspect, the present embodiments provide a terminal device, which in some embodiments includes an antenna structure, or an antenna module, of the present disclosure.

The terminal equipment of the embodiment comprises the antenna structure or the antenna module of the disclosure, and has all technical effects of the disclosure.

The terminal device of this embodiment includes: smart phones, tablet computers, MP3 players (Moving Picture Experts Group Audio Layer III, dynamic video expert compression standard audio layer 3), MP4 (Moving Picture Experts Group Audio Layer IV, dynamic video expert compression standard audio layer 4) players, notebook or desktop computers, etc., or devices benefiting from wireless communication technology, such as electric shavers, electric toothbrushes, service point terminals, wearable devices, and automotive, medical and industrial products.

In some possible implementations, the terminal device may include Radio Frequency (RF) circuitry, memory including one or more computer-readable storage media, an input unit, a display unit, a sensor, audio circuitry, a Wi-Fi module, a processor including one or more processing cores, and a power supply.

The terminal device further comprises a power source (e.g. a battery) for powering the various components, which may preferably be logically connected to the processor via a power management storage medium, whereby the functions of managing charging, discharging, and power consumption are performed via the power management storage medium. The power supply may also include one or more of any of a direct current or alternating current power supply, a rechargeable storage medium, a power failure detection circuit, a power converter or inverter, a power status indicator, and the like.

It should be noted that references herein to "a number", "at least one" means one or more, and "a plurality", "at least two" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

In the description of the present disclosure, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In this disclosure, unless expressly stated or limited otherwise, a first feature being "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present specification, reference to the terms "certain embodiments," "one embodiment," "some embodiments," "an exemplary embodiment," "an example," "a particular example," or "some examples" means 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 present disclosure.

The foregoing description of the embodiments of the present disclosure is not intended to limit the present disclosure, but rather, any modifications, equivalents, improvements, etc. that fall within the principles of the present disclosure are intended to be included within the scope of the present disclosure.

Claims (12)

1. An antenna structure, the antenna structure comprising: the radiating device comprises a radiator (1), a parasitic branch (2), a feed point (3), a first switching point (4) and a second switching point (5);

the radiator (1) comprises a first radiation branch (11) positioned at a first side part (100) of the terminal equipment and a second radiation branch (12) positioned at a second side part (200) of the terminal equipment, wherein the first side part (100) and the second side part (200) are adjacent and intersected to form a corner part (300);

the first radiating branch (11) comprises a first end (111) and a second end (112), the second radiating branch (12) comprises a third end (121) and a fourth end (122); -the first end (111) is located at the first side (100), the fourth end (122) is located at the second side (200), the second end (112) and the third end (121) are connected to the corner (300);

-the feeding point (3) is located on the first radiating branch (11) between the first end (111) and the second end (112), the first switching point (4) is located at the corner (300), and the second switching point (5) is located at the fourth end (122);

the parasitic branch (2) is located on at least one of the first side (100) and the second side (200), one end of the parasitic branch (2) can be coupled with the first end (111) or the fourth end (122) respectively, and the other end is grounded.

2. The antenna structure according to claim 1, characterized in that the length of the first radiating stub (11) between the feed point (3) and the first end (111) is a, the length of the first radiating stub (11) between the feed point (3) and the second end (112) is B, the length of the second radiating stub (12) is C, satisfying a = B + C.

3. The antenna structure according to claim 2, characterized in that the length C of the second radiating stub (12) has a value in the range 26mm-30mm.

4. The antenna structure according to claim 1, characterized in that the parasitic branch (2) and the first radiation branch (11) or the second radiation branch (12) extend in the same direction;

the length of the parasitic branch knot (2) is 2mm-6mm.

5. The antenna structure according to claim 4, characterized in that the length of the parasitic branch (2) is inversely proportional to the radiation frequency.

6. The antenna structure according to claim 1, characterized in that the parasitic branch (2) comprises a first parasitic branch (21), the first parasitic branch (21) comprising a fifth end (211), a sixth end (212);

the first parasitic branch (21) is located at the first side (100) and has the same extension direction as the first radiating branch (11);

the fifth end (211) is coupled to the first end (111), and the sixth end (212) is grounded.

7. The antenna structure according to any one of claims 1-6, characterized in that the parasitic branch (2) comprises a second parasitic branch (22), the second parasitic branch (22) comprising a seventh end (221) and an eighth end (222);

the second parasitic branch (22) is located at the second side (200) and has the same extension direction as the second radiating branch (12);

the seventh end (221) is coupled to the fourth end (122), and the eighth end (222) is grounded.

8. An antenna module, characterized in that the antenna module comprises an antenna structure as claimed in any of claims 1-7, and a feed unit (6), a first tuning unit (7) and a second tuning unit (8);

the feed unit (6) is electrically connected with the feed point (3); one end of the first tuning unit (7) is electrically connected with the first switch point (4), and the other end of the first tuning unit is grounded; one end of the second tuning unit (8) is electrically connected with the second switch point (5), and the other end of the second tuning unit is grounded.

9. The antenna module according to claim 8, characterized in that the feed unit (6) comprises a first capacitive element (61), a second capacitive element (62), a first inductive element (63) and a feed source (64);

the first end of the first capacitive element (61) is electrically connected with the feeding point (3), the second end of the first capacitive element is electrically connected with the first end of the first inductive element (63), the first end of the second capacitive element (62) and the feeding source (64), and the second end of the first inductive element (63) and the second end of the second capacitive element (62) are grounded.

10. The antenna module according to claim 8, wherein the first tuning unit (7) comprises a third capacitive element (71), a fourth capacitive element (72), a fifth capacitive element (73), a second inductive element (74), a third inductive element (75), a fourth inductive element (76), a first switch (77), a second switch (78), a third switch (79) and a fourth switch (710);

the first end of the third capacitive element (71) is electrically connected with the first switching point (4), and the second end of the third capacitive element is electrically connected with the first end of the second inductive element (74), the first end of the fourth capacitive element (72), the first end of the third inductive element (75), the first end of the fifth capacitive element (73) and the first end of the fourth inductive element (76), respectively;

the second end of the second inductance element (74) is grounded, the second end of the fourth capacitance element (72) is grounded through the first switch (77), the second end of the third inductance element (75) is grounded through the second switch (78), the second end of the fifth capacitance element (73) is grounded through the third switch (79), and the second end of the fourth inductance element (76) is grounded through the fourth switch (710).

11. The antenna module of claim 8, wherein the second tuning unit (8) comprises a sixth capacitive element (81), a single pole four throw switch (82), a fifth inductive element (83), a sixth inductive element (84), a seventh inductive element (85), an eighth inductive element (86) and a ninth inductive element (87);

the first end of the sixth capacitive element (81) is electrically connected with the second switch point (5), the second end of the sixth capacitive element is electrically connected with the first end of the fifth inductive element (83) and the input end of the single-pole four-throw switch (82), and the four output ends of the single-pole four-throw switch (82) are grounded through the sixth inductive element (84), the seventh inductive element (85), the eighth inductive element (86) and the ninth inductive element (87) respectively.

12. A terminal device, characterized in that the terminal device comprises an antenna structure according to any of claims 1-7, or an antenna module according to any of claims 8-11.