CN114628882A

CN114628882A - Antenna device and electronic apparatus

Info

Publication number: CN114628882A
Application number: CN202011455048.3A
Authority: CN
Inventors: 颜创
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2022-06-14
Also published as: EP4254659A1; WO2022121453A1

Abstract

The present application relates to an antenna device and an electronic apparatus. The antenna device comprises an antenna body, a feed module and a frequency band switching module. The antenna body comprises a first conductive branch and a second conductive branch which are spaced from each other, a first feed point is arranged on the first conductive branch, and a second feed point is arranged on the second conductive branch. The feeding module comprises a first feeding circuit connected to the first feeding point and a second feeding circuit connected to the second feeding point. The frequency band switching module is connected to the first conductive branch. One end of the frequency band switching module is connected to the first conductive branch section, and the other end of the frequency band switching module is grounded; the frequency band switching module comprises a switch module and at least two frequency band selection branches, and the at least two frequency band selection branches are connected in parallel; the switch module selectively connects at least one of the at least two frequency band selection branches to the loop of the first conductive branch, so that the first conductive branch can switchably radiate first radio-frequency signals of different frequency bands. The antenna device has wide coverage frequency band range and low cost.

Description

Antenna device and electronic apparatus

Technical Field

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

Background

With the development and progress of science and technology, the communication technology has been developed rapidly and sufficiently, and with the improvement of the communication technology, the popularization of intelligent electronic products has been improved to an unprecedented level, and more intelligent terminals or electronic devices become an indispensable part of the life of people, such as smart phones, smart bracelets, smart watches, smart televisions, computers and the like. These electronic devices perform signal transmission through a built-in antenna device to realize functions such as voice call, navigation positioning, wireless internet access and the like. The radiator is an important component of the antenna device, and the design form and the position layout of the radiator in the mobile phone directly affect the communication performance of the antenna device.

At present, in an electronic device, one or more slits are usually formed in a metal frame to divide the metal frame into a plurality of metal branches, so that a plurality of metal frame antennas can be formed, however, more metal branches are needed to realize signal radiation of a plurality of frequency bands, and the cost of an antenna device is high.

Disclosure of Invention

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

In a first aspect, an embodiment of the present application provides an antenna apparatus, which includes an antenna body, a feeding module, and a frequency band switching module. The antenna body comprises a first conductive branch and a second conductive branch, and a gap is formed between the first conductive branch and the second conductive branch. The first conductive branch is provided with a first feed-in point, and the second conductive branch is provided with a second feed-in point. The feeding module comprises a first feeding circuit and a second feeding circuit; the first feed circuit is connected to the first feed point and is configured to feed a first current signal to the first conductive branch via the first feed point so as to radiate a first radio frequency signal on the first conductive branch; the second feed circuit is connected to the second feed point and configured to feed a second current signal to the second conductive branch via the second feed point, so that the second radiator on the second conductive branch radiates a second radio frequency signal. One end of the frequency band switching module is connected to the first conductive branch section, and the other end of the frequency band switching module is grounded. One end of the frequency band switching module is connected to the first conductive branch section, and the other end of the frequency band switching module is grounded; the frequency band switching module and a connecting node of the first conductive branch are positioned between the first feed-in point and the gap; the frequency band switching module comprises a switch module and at least two frequency band selection branches, and the at least two frequency band selection branches are connected in parallel; the frequency band switching module is configured to selectively connect at least one of the at least two frequency band selection branches into the loop of the first conductive branch through the switch module, so that the first conductive branch can switchably radiate first radio-frequency signals of different frequency bands based on the first current signal.

In a second aspect, an embodiment of the present application provides an electronic device, which includes a housing and the antenna apparatus described above, where the antenna apparatus is integrated in the housing.

In the antenna device and the electronic equipment provided by the embodiment of the application, through being equipped with the frequency band switching module for first electrically conductive minor matters, and in the return circuit of first electrically conductive minor matters of at least one access in two at least frequency band selection branches via switch module, can select the impedance matching performance of the first electrically conductive minor matters of branch adjustment with the help of different frequency bands, make first electrically conductive minor matters can work in different frequency bands, thereby the operating frequency range of first electrically conductive minor matters has been widened, and avoid newly-increased electrically conductive minor matters in order to increase different frequency bands, make antenna device's cost lower and the space that occupies less to a certain extent. Further, at least two frequency band selection branches are arranged in parallel, at least one of the at least two frequency band selection branches can be selected to enter the loop of the first conductive branch, for example, when a plurality of frequency band selection branches are simultaneously accessed into the loop of the first conductive branch, and when a single frequency band selection branch is individually accessed into the loop of the first conductive branch, the frequency band selection branches are accessed into the loops in different combinations, so that the combination state of the frequency band selection branches can be fully utilized, the first conductive branch works in more different frequency bands, the number of the frequency band selection branches is relatively small, and the manufacturing cost of the antenna device is further reduced.

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 diagram of a structure of an antenna device according to an embodiment of the present application.

Fig. 2 is a schematic diagram of another structure of an antenna device provided in an embodiment of the present application.

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

Fig. 4 is an antenna efficiency diagram of the antenna arrangement shown in fig. 3.

Fig. 5 is a schematic diagram of a structure of an antenna device configured with a voltage divider circuit according to an embodiment of the present application.

Fig. 6 is a schematic diagram of another structure of an antenna device configured with a voltage divider circuit according to an embodiment of the present application.

Fig. 7 is a schematic diagram of another structure of an antenna device according to an embodiment of the present application.

Fig. 8 is a schematic diagram 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 a matching circuit block of the antenna device shown in fig. 8.

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 electronic device provided in an embodiment of the present application.

Fig. 14 is a schematic view of the internal structure of the electronic device shown in fig. 13.

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.

In view of the above problems, the inventors of the present application have found, after extensive and repeated research, that an antenna of an existing electronic device is improved, by adding a frequency band selection circuit having a filter between a feed source and a radiator, and by setting parameter values of different elements of the filter, for example, different capacitances or different inductances can be configured in the filter, so that the feed source can feed different current signals to the radiator, and the radiator can radiate radio frequency signals of different frequency bands, thereby increasing the operating frequency band of the antenna and avoiding adding additional metal branches of the antenna. However, in such a tuning scheme, the inventors further found that the current signal fed to the radiator by the feed source is adjusted by the filter, and if the radiator is required to be able to radiate radio frequency signals of multiple frequency bands, multiple corresponding filters and corresponding circuit switches need to be provided.

Therefore, the present inventors have made an effort to reduce the cost of the antenna as much as possible while enabling the antenna to operate in as many frequency bands as possible. After a great deal of repeated research, the inventors propose an antenna device according to an embodiment of the present application and an electronic apparatus having the antenna device. The antenna device comprises an antenna body, a feed module and a frequency band switching module. The antenna body comprises a first conductive branch and a second conductive branch, and a gap is formed between the first conductive branch and the second conductive branch. The first conductive branch is provided with a first feed-in point, and the second conductive branch is provided with a second feed-in point. The feeding module comprises a first feeding circuit and a second feeding circuit. The first feed circuit is connected to the first feed point and is configured to feed a first current signal to the first conductive branch via the first feed point so as to radiate a first radio frequency signal on the first conductive branch; the second feed circuit is connected to the second feed point and configured to feed a second current signal to the second conductive branch via the second feed point, so that the second radiator on the second conductive branch radiates a second radio frequency signal. One end of the frequency band switching module is connected to the first conductive branch section, and the other end of the frequency band switching module is grounded. The frequency band switching module and a connecting node of the first conductive branch are positioned between the first feed-in point and the gap; the frequency band switching module comprises a switch module and at least two frequency band selection branches, and the at least two frequency band selection branches are connected in parallel. The frequency band switching module is configured to selectively connect at least one of the at least two frequency band selection branches into the loop of the first conductive branch through the switch module, so that the first conductive branch can switchably radiate first radio-frequency signals of different frequency bands based on the first current signal.

The antenna device is provided with the frequency band switching module for the first conductive branch, and at least one of the at least two frequency band selection branches is connected into the loop of the first conductive branch through the switch module, so that the impedance matching performance of the first conductive branch can be adjusted by means of different frequency band selection branches, and the first conductive branch can work in different frequency bands, thereby widening the working frequency band of the first conductive branch, avoiding adding new conductive branches for increasing different frequency bands, and ensuring that the cost of the antenna device is lower and the occupied space is smaller to a certain extent. Furthermore, the antenna device has the advantages that one end of the frequency band switching module is grounded, the other end of the frequency band switching module is directly connected into the first conductive branch knot, different frequency band selection branches can be selectively connected into the loop in parallel, different access states of the different frequency band selection branches can be utilized, more working frequency bands are achieved, and the frequency modulation stability is high.

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 an antenna body 10, and a feeding module 30 and a band switching module 50 connected to the antenna body 10. The antenna body 10 is configured to receive and radiate a radio frequency signal, and the feeding module 30 is configured to feed a current signal to the antenna body 10, so that the antenna body 10 can resonate to radiate the radio frequency signal. The power feeding module 30 is adapted to be connected to and can be controlled by a motherboard of an electronic device. The band switching module 50 has one end grounded and the other end connected to the antenna body 10, and the band switching module 50 is configured to use different impedance elements to be connected to a loop of the antenna device 100, so that the antenna body 10 can switchably radiate radio frequency signals of different bands.

The antenna body 10 includes a first conductive branch 14 and a second conductive branch 16, the first conductive branch 14 and the second conductive branch 16 are disposed at intervals, and a gap 12 is disposed between the two. It should be understood that, in some embodiments, the slot 12 may be a void portion opened on the antenna body 10, for example, when the antenna body 10 is prepared, the slot 12 is formed on the substrate of the antenna body 10 by cutting, stamping, etc. to divide the antenna body 10 into the first conductive branch 14 and the second conductive branch 16; in other embodiments, the slot 12 may be an assembled gap portion of the antenna body 10, for example, the antenna body 10 is assembled by the first conductive branch 14 and the second conductive branch 16, and when the first conductive branch 14 and the second conductive branch 16 are assembled, a predetermined distance is separated therebetween, so that the space between the first conductive branch 14 and the second conductive branch 16 forms the slot 12.

In some embodiments, the antenna body 10 is provided with at least one slot 12 (e.g., one, two, or more than two slots 12), the at least one slot 12 dividing the antenna body 10 into at least a first conductive branch 14 and a second conductive branch 16. In some embodiments, the slot 12 is part of an antenna device, and the slot 12 may be understood as a broken slot, which may divide the antenna body 10 into at least two conductive branches. Illustratively, one slot 12 is used to divide the antenna body 10 into a first conductive branch 14 and a second conductive branch 16. When the number of slots 12 is N, the antenna body 10 may be divided into N +1 conductive branches. In some embodiments, the gap 12 may be filled with air, plastic, and/or other dielectric. The shape of the slot 12 may be straight or may have one or more curved shapes. Note that the slot 12 may be provided at any position of the antenna body 10. In the embodiment of the present application, the shape, size, number of the slots 12 and the position of the slot 12 on the antenna body 10 are not further limited.

The first conductive branch 14 includes a first radiator 141 and a first feeding point 143 disposed on the first radiator 14, and the first feeding point 143 is used for connecting the feeding module 30, so that the first radiator 141 can radiate a first radio frequency signal when the feeding module 30 feeds a current signal. In some embodiments, the first conductive branch 14 further includes a first grounding point 145, and the first grounding point 145 is connected to the first radiator 141 and is configured to be connected to the reference ground.

The second conductive branch 16 includes a second radiator 161 and a second feeding point 163 disposed on the second radiator 161, and the second feeding point 163 is used for connecting the feeding module 30, so that the second radiator 161 can radiate a second radio frequency signal when the feeding module 30 feeds a current signal, where frequency bands of the first radio frequency signal and the second radio frequency signal are different. In some embodiments, the second conductive branch 16 further includes a second ground point 165, and the second ground point 165 is disposed on the second radiator 141 and is used for connecting to the reference ground. Further, in the embodiment of the present application, the length of the second conductive branch 16 is smaller than that of the first conductive branch 14, so that the second conductive branch 16 and the first conductive branch 14 are respectively used for radiating radio frequency signals of different frequency bands, for example, the second conductive branch 16 is configured to radiate a high frequency radio frequency signal. Further, in some embodiments, the first radiator 141 is configured to enable energy coupling with the second radiator 161 through the slot 12 under tuning of the frequency band selection module 50, so as to achieve tuning of the high-frequency rf signal. At this time, the width of the slit 12 may be 0.8mm or more and 1.5mm or less, and for example, the width of the slit 12 may be 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, or the like.

The feeding module 30 comprises a first feeding circuit 32 and a second feeding circuit 34. The first feeding circuit 32 feeds a first current signal to the first conductive branch 14 through the first feeding point 143, so that the first radiator 141 on the first conductive branch 14 radiates a first radio frequency signal. The second feeding circuit 34 feeds a second current signal to the second conductive branch 16 through the second feeding point 163, so that the second radiator 161 on the second conductive branch 16 radiates a second rf signal.

One end of the band selection module 50 is grounded, and the other end is connected to the first radiator 143. In the embodiment of the present application, the frequency band selecting module 50 includes a switch module 52 and at least two frequency band selecting branches 54, the at least two frequency band selecting branches 54 are connected in parallel, and the switch module 52 is connected to the at least two frequency band selecting branches 54. The band switching module 50 is configured to selectively connect at least one of the at least two band selection branches 54 into the loop of the first conductive branch 143 through the switch module 52, so that the first radiator 143 can switchably radiate first radio frequency signals of different bands based on the first current signal.

In the embodiment of the present application, the first rf signal is switchably located in different operating frequency bands. For example, the first radio frequency signal may include a Long Term Evolution (LTE) signal, and the operating frequency band of the first radio frequency signal may include at least two frequency bands of LTE. LTE signals can be classified into Low Band (LB), Medium Band (MB), and High Band (HB). In the embodiment of the present application, the first radiator 141 of the first conductive branch 14 may correspondingly radiate a low-frequency radio frequency signal in the LTE signal under the excitation of the first feeding circuit 32. Wherein the low frequency radio frequency signal comprises a frequency range of 703MHz to 960 MHz. The second radiator 161 of the second conductive branch 16, excited by the second feed circuit 34, may correspondingly radiate an intermediate frequency and a high frequency radio frequency signal in the LTE signal, that is, the second radio frequency signal may include a high frequency band (HB) of LTE, where the radio frequency signal of the frequency band (MB) includes a frequency range of 1710MHz to 2170MHz, and the high frequency radio frequency signal may include a frequency range of 2300MHz to 2690 MHz.

The antenna device is provided with the frequency band switching module for the first conductive branch, at least one of the at least two frequency band selection branches is connected into the loop of the first conductive branch through the switch module, the impedance matching of the first conductive branch can be adjusted by means of different frequency band selection branches, so that the first conductive branch can work in different frequency bands, the working frequency band of the first conductive branch is widened, the conductive branch is prevented from being newly added for increasing different frequency bands, the cost of the antenna device is low, and the occupied space is small to a certain extent. Furthermore, the antenna device enables one end of the frequency band switching module to be grounded, the other end of the frequency band switching module to be directly connected into the first conductive branch, different frequency band selection branches can be selectively connected into the loop in parallel, different access states of the different frequency band selection branches can be utilized, more working frequency bands are achieved, and the stability of frequency modulation is high.

Referring to fig. 2, in some embodiments, the at least two band selection branches 54 include a first branch 541 and a second branch 543, one end of the first branch 541 is grounded, the other end of the first branch 541 is connected to the first radiator 141, and the second branch 543 is connected to the first branch 541 in parallel. The first branch 541 and the second branch 543 have impedance elements with different impedance values, so as to change the impedance of the loop when the loop of the first conductive branch 14 is connected, thereby adjusting the first conductive branch 14 to an appropriate impedance matching, so as to radiate a first radio frequency signal of a desired frequency band. In some embodiments, the first branch 541 includes a first capacitor C1, and the second branch 543 includes a first inductor L1. The first capacitor C1 is connected in parallel with the first inductor L1, both of which are controlled by the switch module 52. The switch module 52 selectively connects the first capacitor C1 and/or the first inductor L1 to the loop of the first conductive branch 14. The capacitance of the first capacitor C1 and the inductance of the first inductor L1 may be set according to a specific operating frequency band of the first radio frequency signal, which is not limited in the embodiment of the present application.

Referring to fig. 3, in some embodiments, the at least two frequency band selection branches 54 further include a third branch 545 and a fourth branch 547, one end of the third branch 545 is grounded, the other end of the third branch 545 is connected to the first radiator 141, and the fourth branch 547 is connected to the third branch 545 in parallel. Further, the fourth branch 547, the third branch 545, the second branch 543 and the first branch 541 are connected in parallel, and are all connected to the switch module 52. The fourth branch 547 and the third branch 545 are provided with impedance elements with different impedance values, so that when the loop of the first conductive branch 14 is connected, the impedance of the loop is changed, and the first conductive branch 14 is adjusted to an appropriate impedance matching, so as to radiate a first radio frequency signal of a desired frequency band. In some embodiments, the third branch 545 includes a second capacitor C2 and the fourth branch 547 includes a second inductor L2. The second capacitor C2, the second inductor L2, the first capacitor C1, and the first inductor L1 are connected in parallel and are all controlled by the switch module 52. In this embodiment, the capacitance value of the first capacitor C1 is different from that of the second capacitor C2, and further, the capacitance value of the first capacitor C1 may be larger than that of the second capacitor C2; the inductance of the first inductor L1 is different from the inductance of the second inductor L2, and further, the inductance of the first inductor L1 may be larger than the inductance of the second inductor L2. The switch module 52 selectively connects at least one of the first capacitor C1, the first inductor L1, the second capacitor C2, and the second inductor L2 to the loop of the first conductive branch 14 to obtain the first rf signal of the desired frequency band. The capacitance of the second capacitor C2 and the inductance of the second inductor L2 may be set according to a specific operating frequency band of the first radio frequency signal, which is not limited in the embodiment of the present application.

In the present embodiment, the switch module 52 is connected to the band selecting branches 54 and is used for controlling on/off of each band selecting branch 54. The switch module 52 may be connected between the band selection branch 54 and the first radiator 141, or between the band selection branch 54 and the reference ground. In this embodiment, the switch module 52 includes at least two switches, the at least two switches are disposed in one-to-one correspondence with the at least two frequency band selecting branches 54, and each switch is connected to one corresponding frequency band selecting branch 54 to control on/off of the corresponding frequency band selecting branch 54. Specifically, in the embodiment shown in fig. 3, the switch module 52 may include a first switch K1, a second switch K2, a third switch K3, and a fourth switch K4, where the first switch K1 is connected between the first band selecting branch 541 and the first radiator 141, the second switch K2 is connected between the second band selecting branch 543 and the first radiator 141, the third switch K3 is connected between the third band selecting branch 545 and the first radiator 141, and the fourth switch K4 is connected between the fourth band selecting branch 547 and the first radiator 141. In this embodiment, each switch may be a single-pole single-throw switch or an electronic switch tube, etc. The electronic switching tube can be a MOS tube, a transistor, or the like. In the embodiment of the present application, the specific components of the switch module 54 are not further limited, and the requirements of on-off control of the multiple frequency band selecting branches 54 may be satisfied.

Based on the frequency band switching module 50, the following description will exemplify the state of the first conductive branch 14 when switching the operating frequency band. In this embodiment, the inductance of the first inductor L1 may be in a range of 25nH to 45nH, the inductance of the second inductor L2 may be in a range of 10nH to 25nH, the capacitance of the first capacitor C1 may be in a range of 0.5pF to 1.5pF, and the capacitance of the second capacitor C2 may be in a range of 0.2 pF to 0.7 pF. When the first conductive branch 14 needs to operate in the Primary Receiver (PRX) frequency band of the B5 frequency band (the uplink 824-849MHz, the downlink 869-894MHz), the switch module 52 controls all the frequency band selection branches 54 to be disconnected, or the third switch K3 controls the second capacitor C2 to be connected to the access loop, so that the first radio frequency emission signal of the PRX frequency band of the B5 frequency band can be obtained under the excitation of the first current signal of the first feeding circuit 32. When the first conductive branch 14 needs to work in a Diversity Receive (DRX) frequency band of the B5 frequency band, the first inductor L1 is controlled by the second switch K2 to be conducted to the access loop, and a first radio frequency emission signal of the DRX frequency band of the B5 frequency band can be obtained under the excitation of the first current signal of the first feed circuit 32. When the first conductive branch 14 is required to operate in the PRX frequency band of the B8 frequency band (uplink 880-915MHz, downlink 925-960MHz), the fourth switch K4 controls the second inductor L2 to conduct the access loop, and the first rf radio signal of the PRX frequency band of the B8 frequency band can be obtained under the excitation of the first current signal of the first feeding circuit 32. When the first conductive branch 14 is required to work in a DRX frequency band of a B8 frequency band, the second switch K2 and the fourth switch K4 are used for controlling the first inductor L1 and the second inductor L2 to be connected in parallel to a loop, so that the total inductance is 7.5 nH-16 nH, and a first radio frequency emission signal of the DRX frequency band of the B8 frequency band can be obtained under the excitation of a first current signal of the first feeding circuit 32. When the first conductive branch 14 is required to work in the DRX frequency band of the B28 frequency band, the second capacitor C2 is controlled to be connected to the loop through the third switch K3, and the first radio frequency transmission signal of the DRX frequency band of the B28 frequency band can be obtained under the excitation of the first current signal of the first feeding circuit 32. When the first conductive branch 14 is required to work in a PRX frequency band of a B28 frequency band, the first switch K1 and the third switch K3 are used to control the first capacitor C1 and the second capacitor C2 to be connected in parallel to the loop, so that a total capacitance value of about 0.7pF to 2.0pF is obtained, and a first radio frequency emission signal of the PRX frequency band of the B28 frequency band can be obtained under the excitation of a first current signal of the first feed circuit 32.

It can be seen that, with the frequency band switching module 50 provided in this embodiment, the first radio frequency emission signal of the LB frequency band can be obtained by using different frequency band selection branches 54, and each frequency band under the LB frequency band, such as B5, B8, B28, etc., is further subdivided into the PRX frequency band and the DRX frequency band for tuning, so that the sideband performance of the antenna apparatus 100 can be improved by using different frequency band selection branches 54 to access the loop in parallel, and the LB bandwidth is prevented from being too narrow.

Further, in this embodiment, the frequency band switching module 50 may also be used to assist in exciting the coupling state between the first conductive branch 14 and the second conductive branch 16, for example, the first radiator 141 is configured to enable energy coupling with the second radiator 161 through the slot 12 under tuning of the frequency band selection module 50, so as to meet the resonance requirement of the medium-high frequency band. Illustratively, when the antenna device 100 is tuned to be in the 1/2 λ mode, the operating frequency band thereof is further tuned to a frequency band near the resonance point of the 1/4 λ mode of the second conductive branch 16, or tuned to a frequency band near the resonance point of the 3/4 λ mode of the first conductive branch 14, so as to obtain a hybrid mode, so that the bandwidths of the 1/4 λ mode of the second conductive branch 16 and the 3/4 λ mode of the first conductive branch 14 are wider, and the antenna efficiency is improved at the same time. Specifically, when the antenna apparatus 100 is in the 1/2 λ mode, the first switch K1 and the third switch K3 control the first capacitor C1 and the second capacitor C2 to be connected in parallel to the loop, and mix with the 1/4 λ mode of the second conductive branch 16, so as to obtain the second rf signal in the B3 frequency band (1710-.

Referring to fig. 4, fig. 4 shows the antenna efficiency when the B3 frequency band is obtained by using the mixed mode tuning and the antenna efficiency when the B3 frequency band is obtained by using the traditional single mode, which shows that the bandwidth is relatively wider and the efficiency is higher when the B3 frequency band is obtained by using the frequency band switching module 50 in the present embodiment. At this time, it can be seen that the state of the frequency band switching module 50 in which the first capacitor C1 and the second capacitor C2 are connected in parallel to the loop is the same as the state of the frequency band switching module 50 in the PRX frequency band of the B28 frequency band, that is, the state of the frequency band switching module 50 can be multiplexed, and by using the same state of the frequency band switching module 50, two modes of resonance can be obtained, so as to further ensure that fewer elements are required for the antenna device 100 of this embodiment, so as to ensure that the cost of the antenna device 100 is relatively low.

Accordingly, when the antenna device 100 is in the 1/2 λ mode, the first inductor L1 and the second inductor L2 can be controlled to be connected in parallel to the loop through the second switch K2 and the fourth switch K4, and the second inductor L1 and the second inductor L2 are mixed with the 3/4 λ mode of the first conductive stub 16, so that a second radio frequency signal of a B41 frequency band (2496Hz to 2690MHz) is obtained, and the bandwidth of the second radio frequency signal is relatively wider and the efficiency of the second radio frequency signal is higher. At this time, it can be seen that the state of the frequency band switching module 50 in which the first inductor L1 and the second inductor L2 are connected in parallel to the loop is the same as the state of the frequency band switching module 50 in the DRX frequency band of the B8 frequency band, so that the switch state multiplexing in the frequency band switching module 50 is realized, and more Carrier Aggregation (CA) states can be provided. This is because the CA state requires the antenna to support two or more frequency bands at the same time, the line device 100 provided in the embodiment of the present application can enable the high frequencies in partial frequency bands to exist at the same time (e.g., B3 and B1 exist at the same time, B3 and B41 exist at the same time, etc.), and the switching state multiplexing can enable one frequency band to exist at the same time in each of the LB frequency band and the MHB frequency band, which supports more CA states without increasing the cost. Other working frequency bands can be obtained by debugging different capacitance and inductance access circuits, and the specification is not exhaustive one by one.

The antenna device is provided with the frequency band switching module for the first conductive branch, and at least one of the at least two frequency band selection branches is connected into the loop of the first conductive branch through the switch module, so that the first conductive branch can work in different frequency bands by means of different frequency band selection branches, the working frequency band of the first conductive branch is widened, the conductive branches are prevented from being newly added for increasing different frequency bands, and the cost of the antenna device is lower and the occupied space is smaller to a certain extent. The state of the frequency band switching module can be multiplexed, and the resonance of two modes can be obtained through the state of the same frequency band switching module, so that the antenna device of the embodiment further needs fewer elements, and the cost of the antenna device is relatively low.

Referring to fig. 6, in some embodiments, the antenna apparatus 100 may further include a voltage dividing circuit 60, where the voltage dividing circuit 60 is connected to the frequency band switching module 50, and is used for dividing a voltage of the circuit of the frequency band switching module 50 to improve a voltage resistance of the circuit and avoid a bad influence on the circuit caused by a low voltage resistance of the switch module 52. Further, a first end of the voltage divider circuit 60 is grounded, and a second end of the voltage divider circuit 60 is connected to the circuit of the frequency band switching module 50, for example, in some embodiments, the second end of the voltage divider circuit 60 may be connected to a common node between the switch module 52 and the first radiator 141, and the first end may be directly grounded; in other embodiments, the second end of the voltage divider circuit 60 may be connected to the common node of the switch module 52 and the first radiator 141, and the first end may be connected to the common node of the frequency band selecting branches 54 at the reference ground, and at this time, the voltage divider circuit 60 may be considered to be connected in parallel with the frequency band switching module 50 (as shown in fig. 6). It should be understood that in the embodiments of the present application, "common point" is understood to be a common point of a circuit, which is not limited to one physical node, but is further understood to be a point on the circuit where the electric potential is substantially the same.

In other embodiments (as shown in fig. 7), the second end of the voltage dividing circuit 60 may be connected to the common connection point of the switch module 52 and the first radiator 141, and the first end is grounded through the first inductor L1, that is, when the second switch K2 is turned off, the voltage dividing circuit 60 is connected in series with the first inductor L1 and then grounded, so that the area of the circuit board occupied by the voltage dividing circuit 60 is relatively small, which is beneficial to the wiring of the circuit board; of course, in some embodiments, the second end of the voltage divider circuit 60 may also be connected to the common node between the switch module 52 and the first radiator 141, and the first end is grounded through the second inductor L2, that is, when the fourth switch K4 is turned off, the voltage divider circuit 60 is connected in series with the second inductor L2 and then grounded.

In the embodiment of the present invention, the voltage dividing circuit 60 may include a resistor and/or an inductor, and in the embodiment, the voltage dividing circuit 60 includes an inductor L0, a first end of the inductor L0 is grounded, and a second end of the inductor L0 is connected to the circuit of the frequency band switching module 50, and an inductance of the circuit is greater than or equal to 30nH, so as to improve a voltage resistance of the frequency band switching module 50. Of course, in other embodiments, the specific inductance of the inductor L0 may be adapted according to the inductance of the first inductor L1 or the second inductor L2 connected in series with the inductor L0, which is not exhaustive in this specification.

It should be understood that, in the antenna apparatus 100 provided in the embodiment of the present application, the number of the band switching modules 50 is not limited. For example, in the above embodiment, there is one band switching module 50, and the one band switching module 50 is connected to the first conductive branch 14 to increase the operating band of the first conductive branch 14. Referring to fig. 5, in some other embodiments, there may be two frequency band switching modules 50, and the two frequency band switching modules 50 may be connected to the first conductive branch 14 and the second conductive branch 16 respectively, so as to increase the operating frequency bands of the first conductive branch 14 and the second conductive branch 16 respectively. Any one of the two frequency band switching modules 50 may have the features provided in the above embodiments, and the description of this embodiment is omitted. For example, one of the two frequency band switching modules 50 is connected to the first conductive branch 14, and the other is connected to the second conductive branch 16; the band switching module 50 connected to the second conductive branch 16 is configured to switch at least one of the at least two band selection branches 54 into the loop of the second conductive branch 16 via the switch module 52, so that the second conductive branch 16 can operate in different frequency bands. Further, the connection node between the frequency band switching module 50 and the second conductive branch 16 is located between the second feeding point 163 and the gap 12, so as to ensure that the reliability of the frequency band switching module 50 is high during tuning.

In other embodiments, when the antenna body 10 is provided with N slots 12, the N slots 12 divide the antenna body 10 into N +1 conductive branches, and for each conductive branch, a corresponding frequency band switching module 50 may be provided, where the frequency band switching module 50 is configured to connect at least one of the at least two frequency band selection branches 54 to a loop of the corresponding conductive branch through the switch module 52, so that the corresponding conductive branch can operate in different frequency bands.

Referring to fig. 8, in some embodiments, the first feeding circuit 32 includes a first feeding source 321, and the first feeding source 321 is connected to the first feeding point 143 to feed a first current signal to the first conductive branch 14. Further, the first feeding circuit 32 may further include a first matching sub-circuit 323 for adjusting the first radio frequency signal, the first matching sub-circuit 323 is connected between the first feed 321 and the first feed point 143, and the first matching sub-circuit 323 may be configured to adjust an input impedance of the first radiator 141, so as to improve transmission performance of the first radiator 141. The first matching sub-circuit 323 may comprise a combination of capacitance and/or inductance, etc. In the embodiment of the present application, the specific form of the first matching sub-circuit 323 is not further limited. In the present embodiment, the first feeding point 143 is disposed at an end of the first conductive branch 14 away from the slot 12, it should be understood that in other embodiments, a parameter of the first matching sub-circuit 323 may affect a location of the first feeding point 143, for example, the first feeding point 143 may be disposed at an end of the first conductive branch 14 close to the slot 12, and a specific location of the first feeding point 143 is associated with the first matching circuit 241, that is, the specific location of the first feeding point 143 may be disposed according to the first matching circuit 241.

In the present embodiment, the second feeding circuit 34 includes a second feeding source 341, and the second feeding source 341 is connected to the second feeding point 163 to feed the second current signal to the second conductive branch 16. Further, the second feeding circuit 34 may further include a second matching sub-circuit 343, which is used to adjust the second radio frequency signal, the second matching sub-circuit 343 is connected between the second feed 341 and the second feed point 163, and the second matching sub-circuit 343 may be used to adjust the input impedance of the second radiator 161, so as to improve the transmission performance of the second radiator 161. The second matching subcircuit 343 may comprise a combination of capacitors and/or inductors, etc. In the embodiment of the present application, the specific composition of the second matching sub-circuit 343 is not further limited. In the present embodiment, the second feeding point 163 is disposed at an end of the second conductive branch 16 away from the slot 12, and it should be understood that in other embodiments, the parameter of the second matching sub-circuit 343 may affect the disposing position of the second feeding point 163, for example, the second feeding point 163 may be disposed at an end of the second conductive branch 16 close to the slot 12, and the specific position of the second feeding point 163 is associated with the second matching circuit 241, that is, the specific position of the second feeding point 163 may be disposed according to the second matching circuit 241.

Referring to fig. 9, in some embodiments, the first feeding circuit 32 may further include a first filter sub-circuit 325, and the first filter sub-circuit 325 is connected between the first matching sub-circuit 323 and the first feeding point 143. The first filter sub-circuit 325 is configured to filter out rf signals other than frequencies corresponding to the first rf signal, so that the first rf signal is turned on when flowing through the first filter sub-circuit 325. In some embodiments, the first filtering sub-circuit 325 is a low pass filtering sub-circuit. The low-pass filter sub-circuit can be understood as a state that the first rf signal passes through the first filter sub-circuit 325, and blocks the non-first rf signal having a frequency higher than the corresponding frequency of the first rf signal from passing through the first filter sub-circuit 325. Specifically, the first filter sub-circuit 325 may include a third capacitor C3 and a third inductor L3, wherein a first end of the third capacitor C3 is connected to a first end of the third inductor L3 and the first feed point 143, respectively, and another end of the third capacitor C3 is connected to the first matching sub-circuit 323; the second terminal of the third inductor L3 is connected to ground.

In some embodiments, the second feeding circuit 34 may further include a second filtering sub-circuit 345, and the second filtering sub-circuit 345 is connected between the second matching sub-circuit 343 and the second feeding point 163. The second filter sub-circuit 345 is configured to filter the rf signals outside the frequency corresponding to the second rf signal, so that the second rf signal is turned on when flowing through the second filter sub-circuit 345. In some embodiments, the second filtering sub-circuit 213 is a high-pass filtering sub-circuit. The high-pass filtering sub-circuit can be understood as a state that the second rf signal passes through the second filtering sub-circuit 213, and blocks the non-second rf signal having a frequency lower than the corresponding frequency of the second rf signal from passing through the second filtering sub-circuit 213. Specifically, the second filter sub-circuit 213 includes a fourth capacitor C4 and a fourth inductor L4, wherein a first end of the fourth capacitor C4 is connected to a first end of the fourth inductor L4 and the second feed point 163, respectively, and another end of the fourth capacitor C4 is connected to the second matching sub-circuit 343; the second terminal of the fourth inductor L4 is connected to ground.

Referring to fig. 10, in some embodiments, the antenna apparatus 100 may further include a matching circuit module 70, where one end of the matching circuit module 70 is grounded and the other end is connected to the first conductive branch 14. Further, the matching circuit module 70 is connected to the first radiator 141, and a connection node between the matching circuit module 70 and the first radiator 141 is located between the connection node between the frequency band switching module 50 and the first radiator 141 and the first feed-in point 143, so that the matching circuit module 70 can be used not only for performing fine tuning correction on the frequency band of the first radio frequency signal, but also for adjusting the loop impedance of the first conductive branch 14, so as to improve the transmission performance of the first radiator 141, and make the operating frequency band of the first radiator 141 wider and the adjustment more reliable. In this embodiment, the matching circuit module 70 may include a combination of a capacitor and/or an inductor, and parameters of the capacitor and/or the inductor do not change with the operating frequency band of the antenna device 100 after the antenna device 100 is debugged, so as to ensure that the matching circuit module 70 can reliably improve the impedance matching performance of the first radiator 141, thereby improving the signal transmission performance of the antenna device 100.

Referring to fig. 11, in some embodiments, the matching circuit module 70 may include a capacitor C5, an inductor L5, and an inductor L6, a first end of the inductor L6 is connected to the first radiator 141, and a second end of the inductor L6 is connected to ground, and the capacitor C5 and the inductor L5 are connected in series and then connected in parallel to two ends of the inductor L6, that is, a first end of the inductor L5 is connected to a first end of the inductor L6, a second end of the inductor L3526 is connected to a first end of the capacitor C5, and a second end of the capacitor C5 is connected to a second end of the inductor L6. The capacitance range of the capacitor C5 can be 0.5-2.7 pF, the inductance range of the inductor L5 can be 1 nH-5.1 nH, and the inductance range of the inductor L6 can be 5.6 nH-20 nH. By disposing the matching circuit module 70 on the first radiator 141, the connection node between the matching circuit module 70 and the first radiator 141 is located between the first feeding point 143 and the second feeding point 163, so that the isolation between the two feeding points can be improved, and the signal transmission performance of the antenna device 100 is better.

Referring to fig. 12, in some embodiments, the first conductive branch 14 may include a first feeding portion 147, the first feeding portion 147 is connected between the first radiator 141 and the first feeding circuit 32, and the first feeding point 143 may be disposed on the first feeding portion 147, for example, on an end of the first feeding portion 147 away from the first radiator 141, or on a coupling point between the first feeding portion 147 and the first radiator 141. The first feeding portion 147 may be a conductive elastic piece or a screw coupler, and specifically, the first feeding point 143 may be connected to the first feeding circuit 32 through the conductive elastic piece or the screw. The first feeding circuit 32 can feed a first current signal to the first conductive branch 14 through the first feeding point 143 by a feeding manner of a spring or a screw, so as to generate radiation, that is, to radiate a first radio frequency signal having a plurality of different operating frequency bands. The first conductive branch 14 may further include a first grounding portion 149 connected to the first radiator 141, and the first grounding point 145 is disposed on the first grounding portion 149. The first ground point 145 can be connected to the reference ground through the first ground portion 149 to achieve conduction with the ground. The first grounding portion 149 may be a conductive body such as a spring plate or a screw, or a flexible circuit board, and the first grounding portion 149 may also be a connecting arm made of the same material as the first conductive branch 14. For example, the first ground portion 149 and the first conductive branch 14 may be integrally formed to simplify the structure of the antenna device 100.

In this embodiment, the second conductive branch 16 may include a second feeding portion 167, the second feeding portion 167 is connected between the second radiator 161 and the second feeding circuit 32, and the second feeding point 163 may be disposed at the second feeding portion 167, for example, at an end of the second feeding portion 167 far from the second radiator 161, or at a coupling point between the second feeding portion 167 and the second radiator 161. The second feeding portion 167 may be a conductive elastic piece or a screw coupler, and specifically, the second feeding point 163 may be connected to the second feeding circuit 32 through the conductive elastic piece or the screw. The second feeding circuit 32 can feed a second current signal into the second conductive branch 16 through the second feeding point 163 by a feeding manner of a spring or a screw, so as to generate radiation, i.e., radiate a second rf signal having a plurality of different operating frequency bands. The second conductive branch 16 may further include a second ground portion 169 connected to the second radiator 161, and the second ground point 165 may be disposed on the second ground portion 169. The second ground point 165 may be connected to a reference ground via a second ground portion 169 to allow conduction to ground. The second grounding portion 169 may be a conductive body such as a spring plate or a screw, or a flexible circuit board, and the second grounding portion 169 may also be a connecting arm made of the same material as the second conductive branch 16. For example, the second ground portion 169 and the second conductive branch 16 may be integrally formed to simplify the structure of the antenna device 100.

The antenna device is provided with the frequency band switching module for the first conductive branch, at least one of the at least two frequency band selection branches is connected into the loop of the first conductive branch through the switch module, the first conductive branch can work in different frequency bands by means of different frequency band selection branches, the working frequency band of the first conductive branch is widened, the conductive branches are prevented from being newly added for increasing different frequency bands, and the antenna device is low in cost and small in occupied space to a certain extent.

Referring to fig. 13, 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, a Mobile phone, a tablet computer, a notebook computer, a palm computer, a Mobile Internet Device (MID), a wearable Device (e.g., a smart watch, a smart bracelet, a pedometer, etc.), or other communication devices that can be provided with an antenna Device. The electronic device 400 of the present embodiment is described by taking a mobile phone as an example.

The electronic apparatus 400 includes a housing 1001, and a display screen 1003 and an antenna device 1004 provided on the housing 1001. 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 1003 generally includes a display panel, and may also include a circuit and the like for performing a touch operation on the display panel in response. 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 1001 includes a rear shell 1010 and a middle frame 1011, and the rear shell 1010 and the display screen 1003 are respectively disposed on two opposite sides of the middle frame 1011.

Referring to fig. 14, the middle frame 1011 can be an integrally formed structure, which can be structurally divided into a carrying portion 1012 and a frame 1013 surrounding the carrying portion 1012. It should be understood that the designations of "carrying portion" and "frame" are merely provided for convenience of description, and the filled diagonal lines in the drawings are merely used for distinguishing and not for representing the actual structures of the two, and there may be no obvious boundary between the two, or two or more components may be assembled together, and the designations of "carrying portion" and "frame" should not limit the structure of the middle frame 1011. The supporting portion 1012 is used for supporting a part of the display 1003, and may also be used for supporting or mounting electronic components of the electronic device 200, such as the main board 1005, the battery 1006, and the sensor module 1007, and the frame 1013 is connected to a periphery of the supporting portion 1012. Further, the frame 1013 is disposed around the periphery of the carrying part 1012 and protrudes with respect to the surface of the carrying part 1012, so that the two together form a space for accommodating the electronic component. In this embodiment, the display 1013 is disposed on the frame 1013, and the frame 1013, the rear case 1010 and the display 1003 together form an external appearance of the electronic device 400.

In this embodiment, the antenna device 1004 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 reference may be made to the foregoing embodiments for related features, which are not described in detail in this embodiment. The antenna device 1004 is integrated in the housing 1001, for example, the antenna device 1004 may be disposed on the middle frame 1011 or disposed on the rear housing 1010, which is not limited in this specification. The antenna device 1004 of the present embodiment may include an antenna body 10, a feeding module 30 and a band switching module 50 connected to the antenna body 10, and the antenna body 10 may include a first conductive branch 14 and a second conductive branch, which are substantially the same as the antenna device 100 described above. The antenna body 10 is disposed on the middle frame 1011, the feeding module 30 can be connected to the main board 1005, and the first ground point 145 and the second ground point 165 can be connected to at least one of the main board 1005, the carrying portion 1012, and the rear case 1010.

Further, in the embodiment shown in fig. 14, the frame 1013 is made of metal, for example, the material of the frame 1013 may include aluminum alloy, magnesium alloy, and the like. The antenna device 1004 is integrated with the frame 1013. In the present embodiment, the frame 1013 has a slot 1014, the slot 1014 communicates with the outside and divides the frame 1013 into two parts, and the antenna device 1004 is integrated into one part of the frame 1013, and the slot 1014 is the slot 12 in the above-mentioned embodiment. In this way, the metal frame 1013 is used as a part of the radiator of the antenna device 1004, which is beneficial to saving space in the electronic device 400, and also provides a larger clearance area for the antenna device 1004, which is beneficial to ensuring higher radiation efficiency.

In this embodiment, a gap is formed between the frame 1013 as the part of the antenna body 10 and the carrier 1013, and the gap is communicated with the slot 1014, so that the first ground point 16 of the radiator 12 is spaced from the carrier 1012 to prevent the carrier 1012 from affecting the resonant frequency of the radiator 12. Further, a non-shielding body (not shown) made of non-metal (such as resin, etc.) having a characteristic of passing electromagnetic wave signals may be disposed in the slot 1014 to allow the antenna device 1004 to perform signal transmission. The outer surface of the non-shield is flush with the outer surface of the rim 1013 to ensure the integrity of the appearance of the electronic device 400.

In other embodiments, the frame 1013 may be made of non-metal, and the antenna device 100 may be integrated with the frame 1013. For example, the frame 1013 may be made of plastic, resin, or other materials, and the antenna body 10 of the antenna device 100 may be integrated with the frame 1013 by insert molding (e.g., the antenna body 10 is integrally embedded inside the frame 1013), or may be integrated with the frame 1013 by attaching (e.g., the antenna body 10 is attached to the surface of the frame 1013).

In some embodiments, the frame 1013 may be a rounded rectangular frame, wherein the frame 1013 may include a first frame and a third frame that are disposed opposite to each other, and a second frame and a fourth frame that are disposed opposite to each other, wherein the second frame is connected to the first frame and the third frame, respectively. Wherein the first border can be understood as a top border of the electronic device 400, the third border can be understood as a bottom border of the electronic device 400, and the second border and the fourth border can be understood as side borders of the electronic device 400. The antenna assembly 1004 can be formed partially or entirely from a portion of the frame 1013. For example, the antenna body 10 of the antenna device 1013 may be partially or integrally formed on at least one of a top frame, a bottom frame and a side frame of the electronic device 400.

It should be 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, comprising:

the antenna comprises an antenna body and a first antenna body, wherein the antenna body comprises a first conductive branch knot and a second conductive branch knot, and a gap is formed between the first conductive branch knot and the second conductive branch knot;

a first feed-in point is arranged on the first conductive branch, and a second feed-in point is arranged on the second conductive branch;

a feeding module including a first feeding circuit and a second feeding circuit; the first feed circuit is connected to the first feed point and configured to feed a first current signal to the first conductive branch via the first feed point, so that a first radio frequency signal is radiated from the first conductive branch; the second feed circuit is connected to the second feed point and configured to feed a second current signal to the second conductive branch via the second feed point, so that the second conductive branch radiates a second radio frequency signal; and

a frequency band switching module; one end of the frequency band switching module is connected to the first conductive branch knot, and the other end of the frequency band switching module is grounded; the frequency band switching module and a connection node of the first conductive branch are positioned between the first feed-in point and the gap; the frequency band switching module comprises a switch module and at least two frequency band selection branches, and the at least two frequency band selection branches are connected in parallel; the frequency band switching module is configured to selectively connect at least one of at least two frequency band selection branches into the loop of the first conductive branch through the switch module, so that the first conductive branch can switchably radiate the first radio-frequency signals of different frequency bands based on the first current signal.

2. The antenna apparatus of claim 1, wherein the at least two band selection branches comprise a first branch and a second branch, the first branch comprising a first capacitor, the second branch comprising a first inductor, the first capacitor being connected in parallel with the first inductor.

3. The antenna apparatus of claim 2, wherein the at least two band selection branches further comprise a third branch and a fourth branch, the third branch comprises a second capacitor, the fourth branch comprises a second inductor, and the first capacitor, the first inductor, the second capacitor, and the second inductor are connected in parallel.

4. The antenna device of claim 3, wherein a capacitance value of the first capacitor and a capacitance value of the second capacitor are different; the inductance of the first inductor is different from the inductance of the second inductor.

5. The antenna device of claim 1, wherein the switch module comprises at least two switches, and the at least two switches are disposed in one-to-one correspondence with the at least two frequency band selection branches; each switch is connected with one corresponding frequency band selection branch circuit so as to control the on-off of the corresponding frequency band selection branch circuit.

6. The antenna assembly of claim 1 further comprising a matching circuit module for conditioning the first radio frequency signal, the matching circuit module having one end connected to ground and another end connected to the first conductive stub.

7. The antenna apparatus of claim 6, wherein a connection node of the matching circuit module and the first conductive stub is located between the connection node of the frequency band switching module and the first conductive stub and the first feed point.

8. The antenna device according to any one of claims 1 to 7, wherein there are two frequency band switching modules, one of the two frequency band switching modules is connected to the first conductive branch, and the other is connected to the second conductive branch; the frequency band switching module connected to the second conductive branch is configured to connect at least one of the at least two frequency band selection branches to the loop of the second conductive branch through the switch module, so that the second conductive branch can work in different frequency bands.

9. The antenna device of claim 8, wherein a connection node between the band switching module and the second conductive branch is located between the second feeding point and the slot.

10. An electronic device comprising a housing and an antenna device according to any one of claims 1 to 9, the antenna device being integrated in the housing.

11. The electronic device of claim 10, wherein the housing comprises a carrying portion and a frame connected to an edge of the carrying portion, the slot is disposed on the frame, and the antenna device is integrated with the frame.