CN109273854B

CN109273854B - Electronic device

Info

Publication number: CN109273854B
Application number: CN201811165586.1A
Authority: CN
Inventors: 王伟; 任健; 段志远; 伍双杰
Original assignee: Lenovo Beijing Ltd
Current assignee: Lenovo Beijing Ltd
Priority date: 2018-09-30
Filing date: 2018-09-30
Publication date: 2021-06-15
Anticipated expiration: 2038-09-30
Also published as: CN109273854A

Abstract

The present disclosure provides an electronic device. The electronic device includes at least one antenna, a communication system corresponding to at least two different frequency bands, and a matching network circuit. The at least one antenna comprises a first antenna, the working frequency band of the first antenna covers the at least two different frequency bands, and the first antenna is used for enabling the electronic equipment to support a fifth generation mobile communication network. The matching network circuit is used for performing impedance matching on initial impedance when the first antenna works in a first working frequency band enabling the electronic equipment to support a fifth generation mobile communication network, so that output impedance of the matching network circuit reaches standard impedance.

Description

Electronic device

Technical Field

The present disclosure relates to an electronic device.

Background

With the standard and commercialization process of the fifth generation mobile communication network 5G-nr (new radio) being accelerated, it is imperative to apply a working antenna supporting the fifth generation mobile communication network to the communication terminal for the fifth generation mobile communication network communication. Especially against the widely prevailing background of the current full-screen and full-metallic appearance design of mobile phones, the antenna headroom on communication terminals is reduced, which leads to more stringent requirements for the convergence design of 5G-NR and conventional 4G, 3G, and/or 2G antennas on communication terminals.

Disclosure of Invention

The present disclosure provides an electronic device. The electronic device includes: at least one antenna, wherein the at least one antenna comprises a first antenna, an operating frequency band of the first antenna covers at least two different frequency bands, and the first antenna is used for enabling the electronic device to support a fifth generation mobile communication network; a communication system corresponding to the at least two different frequency bands; and the matching network circuit is used for matching the impedance of the initial impedance of the first antenna when the first antenna works in a first working frequency band which enables the electronic equipment to support a fifth generation mobile communication network, so that the output impedance of the matching network circuit reaches a standard impedance.

According to the embodiment of the present disclosure, the first antenna is one of four antennas corresponding to the electronic device supporting a fifth-generation mobile communication network; or the at least one antenna is positioned on a metal shell of the electronic equipment, and the metal shell comprises a metal frame or a metal rear cover; or enabling four antennas corresponding to the electronic device supporting a fifth-generation mobile communication network to be located on a metal shell of the electronic device, wherein the metal shell is a metal frame or a metal rear cover, and the first antenna belongs to the four antennas.

According to an embodiment of the present disclosure, the operating frequency band of the first antenna further includes at least one second frequency band, wherein the first antenna supports both the first frequency band and the at least one second frequency band.

According to an embodiment of the present disclosure, the at least one second frequency band includes a frequency band in which at least one of a global positioning system GPS communication signal, a wireless local area network wifi2.4G communication signal, and a wireless local area network wifi 5.0G communication signal is located; and the matching network circuit is further used for performing impedance matching on the initial impedance of the first antenna when the first antenna works in the at least one second frequency band, so that the output impedance of the matching network circuit reaches the standard impedance.

According to the embodiment of the disclosure, the matching network circuit comprises at least two branches, each branch is connected with a resistance-pass sub-circuit in series and then connected with an impedance matching sub-circuit in series: the blocking sub-circuit is used for allowing or blocking communication signals corresponding to one frequency band or a part of frequency bands of the first frequency band and the at least one second frequency band to pass through; and (c) and (d). The impedance matching subcircuit is used for matching the output impedance of the branch circuit to a standard impedance together with the blocking subcircuit.

According to an embodiment of the present disclosure, the pass-blocking sub-circuit comprises a band-stop filter circuit comprising an LC resonant circuit connected in series on the branch.

According to an embodiment of the present disclosure, the at least two legs comprise a first leg and a second leg. The blocking sub-circuit in the first branch circuit comprises a GPS band elimination filter circuit and is used for blocking GPS communication signals from transmitting through the first branch circuit. The anti-pass sub-circuit in the second branch circuit comprises a wifi2.4G band-stop filter circuit and is used for blocking wifi2.4G transmission to pass through the second branch circuit.

According to an embodiment of the present disclosure, the impedance matching sub-circuit in the first branch comprises a first low-pass filter circuit. The cut-off frequency of the first low-pass filter circuit is higher than the highest frequency of the working frequency band of the wifi2.4G communication signal and lower than the lowest frequency of the communication signal frequency band of the fifth generation mobile communication network.

According to the embodiment of the disclosure, the first low-pass filter circuit is a circuit in which an inductor is connected in series and then a load at the output end of the first branch circuit is connected in parallel with a capacitor.

According to the embodiment of the disclosure, the output end of the second branch is connected with the multi-pass antenna forwarding switch.

Drawings

For a more complete understanding of the present disclosure and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which:

FIG. 1 schematically shows a block diagram of an electronic device according to an embodiment of the disclosure;

fig. 2 schematically illustrates a structural diagram of a first antenna located at a metal bezel of an electronic device according to an embodiment of the present disclosure;

FIG. 3 schematically illustrates an example of an initial impedance plot for a first antenna operating at different frequency points on a Smith chart;

FIG. 4 schematically illustrates a circuit structure diagram of a matching network circuit according to an embodiment of the present disclosure;

fig. 5 schematically illustrates antenna return loss simulation results after a first antenna according to an embodiment of the disclosure is impedance matched by the matching network circuit of fig. 4; and

fig. 6 schematically shows antenna system efficiency simulation results after impedance matching of the first antenna by the matching network circuit of fig. 4 according to an embodiment of the disclosure.

Detailed Description

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood that the description is illustrative only and is not intended to limit the scope of the present disclosure. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The terms "comprises," "comprising," and the like, as used herein, specify the presence of stated features, steps, operations, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, or components.

All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It is noted that the terms used herein should be interpreted as having a meaning that is consistent with the context of this specification and should not be interpreted in an idealized or overly formal sense.

Where a convention analogous to "at least one of A, B and C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B and C" would include but not be limited to systems that have a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.). Where a convention analogous to "A, B or at least one of C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B or C" would include but not be limited to systems that have a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.).

The embodiment of the disclosure provides an electronic device. The electronic device includes at least one antenna, a communication system corresponding to at least two different frequency bands, and a matching network circuit. The at least one antenna comprises a first antenna, the working frequency band of the first antenna covers the at least two different frequency bands, and the first antenna is used for enabling the electronic equipment to support a fifth generation mobile communication network. The matching network circuit is used for performing impedance matching on initial impedance of the first antenna when the first antenna works in a first working frequency band enabling the electronic equipment to support a fifth generation mobile communication network, so that output impedance of the matching network circuit reaches standard impedance. An electronic device according to an embodiment of the present disclosure may support a fifth generation mobile communication network. Moreover, since the working frequency band of the first antenna covers the at least two different frequency bands, the first antenna can realize the multiplexing of multi-band communication signals, and further, the electronic device can support communication network signals such as 4G, 3G, and/or 2G besides the fifth generation mobile communication network.

Fig. 1 schematically shows a block diagram of an electronic device 100 according to an embodiment of the present disclosure.

As shown in fig. 1, the electronic device 100 includes at least one antenna 110, a matching network circuit 120, and a communication system 130. The at least one antenna 110 may include a first antenna 111 (see, e.g., the illustration of fig. 2). The operating frequency band of the first antenna 111 may cover at least two different frequency bands. The first antenna 111 is used to enable the electronic device 100 to support a fifth generation mobile communication network. The communication system 130 corresponds to at least two different frequency bands supported by the first antenna 111. The matching network circuit 120 is configured to perform impedance matching on an initial impedance of the first antenna 111 when the electronic device 100 supports a first operating frequency band of a fifth generation mobile communication network, so that an output impedance of the matching network circuit 120 reaches a standard impedance.

Specifically, when the electronic device 100 communicates through the fifth generation mobile communication network, for example, when receiving signals through the fifth generation mobile communication network, the at least one antenna 110 may receive electromagnetic waves transmitted through the fifth generation mobile communication network, then convert the electromagnetic waves into electrical signals, transmit the electrical signals through the matching network circuit 120, and then output the electrical signals to the communication system 130 operating in the frequency band corresponding to the communication signal of the fifth generation mobile communication network.

The electronic device 100 according to the embodiment of the present disclosure may support a fifth generation mobile communication network. Moreover, since the operating frequency band of the first antenna 111 can cover the at least two different frequency bands, the first antenna 111 can implement multiplexing of multi-band communication signals, and further, the electronic device 100 can support communication network signals such as 4G, 3G, and/or 2G in addition to the fifth generation mobile communication network.

According to an embodiment of the present disclosure, the electronic device 100 may be a notebook computer, an Ipad, a smart phone, a smart watch, or a smart appliance, etc. The present disclosure is not limited thereto.

According to the embodiment of the present disclosure, the first antenna 111 may be one of four antennas corresponding to the electronic device 100 supporting a fifth generation mobile communication network. Alternatively, according to an embodiment of the present disclosure, the at least one antenna 110 is located on a metal housing of the electronic device 100, which includes a metal bezel or a metal back cover. Or, according to the embodiment of the present disclosure, four antennas corresponding to the electronic device 100 supporting the fifth-generation mobile communication network are located on a metal casing of the electronic device 100, and the metal casing is a metal bezel or a metal rear cover, where the first antenna 111 belongs to the four antennas.

Fig. 2 schematically illustrates a structural diagram of the first antenna 111 located in a metal bezel of the electronic device 100 according to an embodiment of the disclosure.

Fig. 2 illustrates a view of the back surface of the electronic device 100, specifically, a partial assembly structure diagram of the electronic device with the back cover detached. In the structure illustrated in fig. 2, the first antenna 111 is located on a metal frame of the electronic device 100, and is connected to a main board of the electronic device 100 through a spring, so as to transmit a communication signal between the antenna and the main board. The matching network circuit 120 as well as the communication system 130 (not visible in fig. 2 due to the view direction) may be arranged on the motherboard.

It is understood that the first antenna 111 illustrated in fig. 2 is located on the metal bezel of the electronic device 100 only one of the various embodiments of the present disclosure.

In other embodiments, all four antennas (including the first antenna 111) corresponding to the electronic device 100 supporting the fifth-generation mobile communication network may be located in different areas of the metal bezel of the electronic device 100 in a manner similar to that illustrated in fig. 2. For example, a metal frame of the electronic device 100 may be divided into a plurality of metal segments, and each metal segment may be provided with an antenna.

In other embodiments, some of the four antennas corresponding to the electronic device 100 supporting the fifth-generation mobile communication network may be located on a metal frame of the electronic device 100 in a manner similar to that illustrated in fig. 2, and other portions of the antennas may be located on a metal rear cover of the electronic device 100.

According to embodiments of the present disclosure, at least one antenna may be implemented on a metal housing (e.g., a metal bezel) of the electronic device 100. For example, if the electronic device 100 is a full-screen device, the front surface of the electronic device 100 has no metal or no opening, and if the antenna is installed on the motherboard, the antenna clearance is not sufficient, and the antenna function required by the communication of the electronic device 100 is implemented on the metal frame, so that the problem of insufficient antenna clearance of the full-screen device can be effectively alleviated.

According to an embodiment of the present disclosure, the operating frequency band of the first antenna 111 further includes at least one second frequency band, wherein the first antenna 111 supports both the first frequency band and the at least one second frequency band.

Specifically, the first antenna 111 may also cover at least one frequency band other than the frequency band where the communication signal of the fifth generation mobile communication network is located, so that multi-frequency multiplexing of the antenna (or a metal frame) may be achieved, and the number of antennas and the occupied space may be effectively reduced. For the multi-frequency multiplexing antenna, a matching network circuit for multiplexing a plurality of working frequency bands can be designed, and the space occupied by the matching network can be effectively reduced.

According to an embodiment of the present disclosure, the at least one second frequency band includes a frequency band in which at least one of a global positioning system GPS communication signal, a wireless local area network wifi2.4G communication signal, and a wireless local area network wifi 5.0G communication signal is located. The matching network circuit 120 is further configured to perform impedance matching on the initial impedance of the first antenna 111 operating in the at least one second frequency band, so that the output impedance of the matching network circuit 120 reaches the standard impedance.

Fig. 3 schematically shows an example of an initial impedance diagram when the first antenna 111 operates at different frequency points on the Smith chart.

As shown in fig. 3, the curves in the Smith chart illustrate an example (by way of example only) of initial impedance information for the antenna at different frequency points for the first antenna 111, where the impedance includes resistance and reactance. Where, the antenna impedance is resistance + j reactance, j being an imaginary unit.

The four

points

1, 2, 3, and 4 marked by the inverted triangle symbol on the curve correspond to the initial impedances of the first antenna 111 when operating in four different operating frequency bands. The coordinate values in the figure are impedance values divided by 50. The x-axis represents the resistance, for example, the resistance value at a point on the x-axis with coordinate 1 is 50 Ω, and the resistance at a point 0.15 is 7.5 Ω. The y-axis is a circular arc, and is divided into positive and negative by the x-axis, and the y-axis coordinate represents reactance (such as inductance or capacitance reactance) divided into an equal resistance circle and an equal reactance circle in a Smith chart.

As shown in fig. 3, according to one embodiment of the present disclosure, the first antenna 111 has a resistance of 4.276968 Ω and a reactance of-54.161882 Ω at a frequency point 1.547868GHz of a GPS communication signal. When the frequency point of the wifi2.4G communication signal is 2.44GHz, the resistance of the first antenna 111 is 4.124283 omega, and the reactance of the first antenna is-16.923914 omega. When the frequency point of the fifth generation mobile communication network communication signal is 3.3GHz, the resistance of the first antenna 111 is 7.7..479 Ω, and the reactance of the first antenna is 11.709389 Ω. When the first antenna 111 is at the frequency point 5GHz of the wifi 5.0G communication signal, the resistance is 94.25802 Ω, and the reactance is 36.561574 Ω.

The matching network circuit 120 matches the initial impedance of the first antenna 111, so that when the first antenna 111 operates at the corresponding frequency point, the output resistance of the matching network circuit 120 reaches the standard impedance (e.g., 50 Ω, i.e., the resistance reaches 50 Ω, and the reactance is 0). According to the embodiment of the present disclosure, when the first antenna 111 can cover multiple operating frequency bands, the matching network circuit 120 may be configured to match initial impedances of the first antenna 111 operating in different operating frequency bands, so that an output impedance of the matching network circuit 120 reaches a standard impedance.

The impedance matching can be carried out according to the Smith chart, and the basic principle is that a reactance element (an inductor or a capacitor) is connected on a complex load, the impedance point on the Smith chart moves along an equal resistance circle by being connected in series, and the corresponding admittance point on the Smith chart moves along an equal conductance circle by being connected in parallel.

According to some embodiments of the present disclosure, the working frequency bands of the first antenna 111 may include four frequency bands, specifically, the four frequency bands are three second working frequency bands of the frequency bands in which the electronic device 100 supports the fifth generation mobile communication network and the GPS communication signal, the wifi2.4G communication signal, and the wifi 5.0G communication signal. The matching network circuit 120 is not only used for performing impedance matching on the initial impedance of the first antenna 111 when the first antenna 111 works in the first working frequency band enabling the electronic device 100 to support a fifth generation mobile communication network, but also used for performing impedance matching on the initial impedance of the frequency band where the first antenna 111 works in a Global Positioning System (GPS) communication signal, the frequency band where a wireless local area network wifi2.4G communication signal is located, and the frequency band where the wireless local area network wifi 5.0G communication signal is located.

According to an embodiment of the present disclosure, the matching network circuit 120 may include at least two branches, each of which is connected in series with a resistance-pass sub-circuit and then an impedance matching sub-circuit. The blocking sub-circuit is used for allowing or blocking communication signals corresponding to one frequency band or a part of frequency bands of the first frequency band and the at least one second frequency band to pass through. The impedance matching subcircuit is used for matching the output impedance of the branch circuit to a standard impedance together with the blocking subcircuit. In this manner, the matching network circuit 120 functions as both impedance matching and communication signal frequency division. Moreover, according to the embodiment of the present disclosure, for the communication signals of the multiple operating frequency bands multiplexed on the first antenna 111, impedance matching on each branch can be more easily achieved by separating the communication signals into at least two branches after blocking the communication signals and then performing matching.

According to an embodiment of the present disclosure, the anti-pass sub-circuit comprises a band-stop filter circuit comprising an LC resonant circuit connected in series on the branch. In this way, the four-in-one antenna which simultaneously covers the GPS communication signal, the wireless local area network wifi2.4G communication signal, the wireless local area network wifi 5.0G communication signal and the fifth generation mobile communication network communication signal can be realized through only a few capacitance inductors without increasing the volume and the number of the antenna. One structure of the matching network circuit 120 can be seen in the schematic of fig. 4.

Fig. 4 schematically shows a circuit configuration diagram of the matching network circuit 401 according to an embodiment of the present disclosure. Wherein the matching network circuit 120 comprises the matching network circuit 401.

Reference numerals

111, 112, 113 and 114 in fig. 4 are interfaces of four antennas corresponding to the fifth generation mobile communication network 5G-NR and corresponding matching network circuits, wherein 111 corresponds to an interface of the first antenna 111. A fifth generation mobile communication network requires four antennas, for example, a first antenna 111, and

other antennas

112, 113, and 114. The four antennas are all capable of covering the operating frequency band of a fifth generation mobile communication network, but the other frequency bands multiplexed by each of the four antennas may be different. Each of the four

antennas

111, 112, 113 and 114 needs to be connected to a corresponding matching network circuit according to its operating frequency band. The matching network circuit 401 of the first antenna 111 is illustrated in fig. 4. The matching network circuit (not shown) corresponding to each of the

other antennas

112, 113, and 114 may be the same as or different from the matching network circuit 401, and is specifically determined according to the working frequency band covered by each of the

antennas

112, 113, and 114.

As shown in fig. 4, the matching network circuit 401 includes a first branch and a second branch. The first branch comprises a blocking sub-circuit 411 and an impedance matching sub-circuit 412 in series. The second branch comprises a blocking sub-circuit 421 and an impedance matching sub-circuit 422 in series.

According to the embodiment of the present disclosure, the blocking sub-circuit 411 may specifically be a GPS band-stop filter circuit 411, which is used to block GPS communication signals from transmitting through the first branch. The pass-blocking sub-circuit 421 in the second branch may specifically be a wifi2.4G band-stop filter circuit 421, which is used to block transmission of wifi2.4G communication signals through the second branch. Thus, the GPS signal can not pass through the first branch circuit, and the wifi2.4G communication signal can not be transmitted through the second branch circuit. In this way, the first-layer frequency division of the communication signal multiplexed by the first antenna 111 can be realized, so that the impedance matching and the communication signal processing for each branch are simpler, and the circuit is simplified conveniently.

Specifically, for example, in the wifi2.4G band-stop filter circuit 421, the center frequency point blocked by the filter circuit is

Wherein, f is₂Corresponding to the center frequency of the wifi2.4G communication signal. This wifi2.4G band elimination filter circuit 421 connects in series in the second branch road for this branch road is equivalent to be open circuit to wifi2.4G communication signal, thereby realizes that the second branch road realizes the separation to wifi2.4G communication signal.

Inductor L_2nAnd a capacitor C_2pProduct of L_2n·C_2pThe central frequency point blocked by the wifi2.4G band-stop filter circuit 421 is determined. It will be appreciated that in circuit design, different combinations of inductance L and capacitance C determine different blocking bandwidths, for example, L ═ 3nH, C ═ 6pF, L ═ 3nH, and C ═ 2pF, and the center frequency points of the two combinations forming the band-stop filter circuit are equal, but the blocking bandwidths are different. This need is adjusted according to specific design goals. Therefore, the inductance L_2nAnd a capacitor C_2pThe specific value of (a) is also determined specifically according to the bandwidth required to be blocked by design in practical application.

For another example, for the GPS band-stop filter circuit 411, the center frequency point blocked by it is

Wherein f is₁Corresponding to the center frequency of the GPS communication signal. The GPS band-stop filter circuit 411 is connected in series in the first branch circuit, so that the first branch circuitThe path corresponding to the GPS communication signal is equivalent to an open circuit, so that the blockage of the GPS communication signal can be realized.

According to an embodiment of the present disclosure, the impedance matching sub-circuit 412 in the first branch comprises a first low pass filter circuit 412. The cut-off frequency of the first low-pass filter circuit 412 is higher than the highest frequency of the working frequency band of the wifi2.4g communication signal and lower than the lowest frequency of the communication signal frequency band of the fifth generation mobile communication network.

Specifically, the first branch is connected with the GPS band rejection filter circuit 411 in series, and then connected with the first low pass filter circuit 412 in series. For the communication signals of four frequency bands covered by the first antenna 111, the communication signals of the GPS are blocked by the GPS band-stop filter circuit 411 on the first branch, and then the fifth generation mobile communication network signal of the remaining three working frequency band communication signals and the wifi 5.0G communication signal with a higher working frequency band are blocked by the first low-pass filter circuit 412, so that only the remaining wifi2.4G reaches the interface (c) connected with the communication system 130 through the first branch.

According to the embodiment of the present disclosure, the first low-pass filter circuit 412 is a circuit that first connects an inductor in series and then connects a load at the output end of the first branch in parallel with a capacitor. Specifically, the first low-pass filter circuit 412 needs to pass through the series inductor L first_4nThen the capacitor C can be connected in parallel_3pThis includes two reasons: first, parallel connection C_3pThen connected in series with L_4nLow-pass filters can also be implemented, but for high-frequency signals, via a parallel C_3pThe signal is directly led to the ground, and the signal fails, so the first series connection L is adopted_4nBlocking and then connecting C in parallel_3pIsolating the port again to reduce the influence on high-frequency signals; secondly, on the Simith chart, the impedance position of the first antenna 111 at the frequency point corresponding to wifi2.4G (refer to fig. 3) determines that the impedance matching can only be performed by connecting L in series_4nParallel C_3pOr parallel L_4nSeries C_3pIn both ways, the scheme shown as the first low-pass filter circuit 412 in fig. 4 has a low-pass filter performance.

For the second branch circuit, since the wifi2.4G band-stop filter circuit 421 has blocked the wifi2.4G communication signal, the impedance matching sub-circuit 422 is mainly used for matching the impedance of the first antenna 111 when working in the working frequency band corresponding to GPS, 5G-NR and wifi 5.0G, and matches the output impedance of the second branch circuit to the standard impedance in combination with the wifi2.4G band-stop filter circuit 421.

The second branch in fig. 4 may transmit three communication signals, i.e., GPS, 5G-NR and wifi 5.0G, and the subsequent communication signal separation needs to be divided according to specific requirements. For example, according to an embodiment of the present disclosure, output end (r) of the second branch may be connected to a three-way antenna forwarding switch. Or, for example, the output end of the second branch (r) may also be connected to a diplexer, and then connected to a switch to switch the operating state after being divided into two branches, and so on.

The isolation between the GPS band-stop filter circuit 411 and the wifi2.4G band-stop filter circuit 421 in the matching network circuit 401 is very high. The band-stop filter circuit consisting of the capacitance and the inductance can achieve the isolation degree of more than 30dB in practice, namely the energy isolation of one thousandth. However, the band-stop filter circuit has obvious defects and insufficient isolation bandwidth. Conversely, the band group filter circuit has little influence on the out-of-band signals, namely the equivalent capacitance or the equivalent inductance is small, which is beneficial to the independent design of the network. In the example, the bandwidths of the GPS and the wifi2.4G are only 30MHz and 80MHz respectively, and the relative bandwidths are only 2% and 3%, so that the band-stop filter circuit is very suitable for the band-stop filter circuit.

According to the embodiment of the disclosure, the first antenna 111 may be connected to the matching network circuit 401 shown in fig. 4 through a spring plate, frequency-divided by two LC band-stop filters and impedance-matched to obtain one WiFi2.4G and one

GPS WiFi

5G and 5G-NR communication signals, and then correspondingly connected to the communication system 130, so that the electronic device 100 may simultaneously support communication in four frequency bands of WiFi2.4G,

GPS WiFi

5G and 5G-NR.

According to an embodiment of the present disclosure, the first antenna 111 may be Monopole. In one embodiment, the first antenna 111 is approximately 19mm in length (by way of example only). In particular, the length of the first antenna 111 depends on the specific environment surrounding the antenna, and needs to satisfy the relative position in the initial impedance of the antenna illustrated in fig. 2.

Fig. 5 schematically shows an antenna return loss simulation result after the first antenna 111 according to an embodiment of the present disclosure is impedance-matched by the matching network circuit 401 of fig. 4. And, fig. 6 schematically shows an antenna system efficiency simulation result after the first antenna 111 according to an embodiment of the present disclosure is impedance-matched by the matching network circuit 401 of fig. 4.

As can be seen from the return loss simulation result of fig. 5, the antenna return loss of the first branch (through wifi2.4G communication signal) drops rapidly at the frequency point 2.44 Ghz; the return loss of the antenna of the second branch (through communication signals of three frequency bands of GPS, 5G-NR and wifi 5.0G) is less than-8 at the frequency point of GPS, is close to-3 at the frequency point of 5G-NR and is less than-6 at the frequency point of wifi 5.0G.

From the antenna system efficiency of fig. 6, the system efficiency of the first antenna 111 at four different operating frequencies through the matching network circuit 401 of fig. 4 is more than-6 dB.

Therefore, from the simulation result, the return loss and the system efficiency index of the first antenna 111 passing through the matching network circuit 401 can both meet the system design requirement.

According to the embodiment of the present disclosure, the matching network circuit 401 may be formed by a simple combination of capacitors and inductors, may be more flexibly disposed in a main board of the electronic device 100, and may simultaneously implement dual functions of signal frequency division and impedance matching.

It is understood that the matching network circuit 401 illustrated in fig. 4 is only one of many embodiments of the matching network circuit 120 of the present disclosure. When the matching network circuit 401 is designed, the functions corresponding to each part of the matching network circuit need to be satisfied, and the design priority is that the number of the branches is determined first, then the resistance-conduction sub-circuit structure of each branch is used, and the impedance matching sub-circuit part of each branch can be adjusted properly. For example, in some embodiments, different capacitance-inductance combinations may be used to pass only GPS communication signals through one branch and the other three frequency bands.

In addition, the matching network circuit 401 in fig. 4 supports the first antenna 111 to operate in four frequency bands, such as a frequency band in which the electronic device 100 supports a fifth generation mobile communication network, and a frequency band in which a GPS communication signal, a wifi2.4G communication signal, and a wifi 5.0G communication signal are located, is merely an example. In practice, the operating frequency band of the first antenna 111 may be more or less, as required, and the operating frequency band of the first antenna 111 may include any combination of the frequency band of the fifth generation mobile communication network and the frequency band of other communication signals. Accordingly, the design of the matching network circuit 401 is adjusted accordingly with the multiplexed frequency band of the first antenna 111.

The embodiment of the present disclosure provides an electronic device 100 capable of supporting a fifth generation communication network, and a first antenna 111 of at least one antenna 110 in the electronic device 100 of the embodiment of the present disclosure, which is used for enabling the electronic device 100 to support the fifth generation mobile communication network, may cover at least two different frequency bands, so that multi-frequency multiplexing of the first antenna 111 may be achieved. Further, according to the embodiment of the present disclosure, the matching network circuit for impedance matching with the first antenna 111 can be used for matching the impedance of the first antenna 111 when operating in the at least two different frequency bands. Aiming at the high requirement of the fusion design of the current 5G-NR and 4/3/2G antennas, the electronic device 100 of the embodiment of the disclosure designs a GPS + wifi 2.4G/5G +5G-NR four-in-one antenna through the idea of the first antenna 111 and the

matching network circuit

120 or 401. In this way, the four-in-one antenna of the 5G-NR antenna and the GPS wifi 2.4G/5G can be realized by only adding a few capacitance inductors without increasing the volume and the number of the antennas.

Those skilled in the art will appreciate that various combinations and/or combinations of features recited in the various embodiments and/or claims of the present disclosure can be made, even if such combinations or combinations are not expressly recited in the present disclosure. In particular, various combinations and/or combinations of the features recited in the various embodiments and/or claims of the present disclosure may be made without departing from the spirit or teaching of the present disclosure. All such combinations and/or associations are within the scope of the present disclosure.

While the disclosure has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Accordingly, the scope of the present disclosure should not be limited to the above-described embodiments, but should be defined not only by the appended claims, but also by equivalents thereof.

Claims

1. An electronic device, comprising:

at least one antenna, wherein the at least one antenna comprises a first antenna, an operating frequency band of the first antenna covers at least two different frequency bands, and the first antenna is used for enabling the electronic device to support a fifth generation mobile communication network;

a communication system corresponding to the at least two different frequency bands;

a matching network circuit, configured to perform impedance matching on an initial impedance of the first antenna when the first antenna operates in a first operating frequency band in which the electronic device supports a fifth-generation mobile communication network, so that an output impedance of the matching network circuit reaches a standard impedance, where the operating frequency band of the first antenna further includes at least one second frequency band, and the first antenna supports both the first frequency band and the at least one second frequency band;

wherein the matching network circuit comprises at least two branches, the at least two branches comprising a first branch and a second branch:

the second branch comprises a band elimination filter circuit, and the band elimination filter circuit is used for preventing a communication signal corresponding to one frequency band of the at least one second frequency band from passing through the second branch, so that the second branch allows the communication signals corresponding to the first frequency band and the rest second frequency bands of the at least one second frequency band to transmit.

2. The electronic device of claim 1, wherein:

the first antenna is one of four antennas corresponding to the electronic equipment supporting a fifth-generation mobile communication network; or

The at least one antenna is positioned on a metal shell of the electronic equipment, and the metal shell comprises a metal frame or a metal rear cover; or

Four antennas corresponding to the electronic equipment supporting a fifth-generation mobile communication network are located on a metal shell of the electronic equipment, the metal shell is a metal frame or a metal rear cover, and the first antenna belongs to the four antennas.

3. The electronic device of claim 1, the at least one second frequency band comprising a frequency band in which at least one of a Global Positioning System (GPS) communication signal, a wireless local area network (wifi) 2.4G communication signal, and a wireless local area network (wifi) 5.0G communication signal is located; and

the matching network circuit is further configured to perform impedance matching on an initial impedance of the first antenna when the first antenna operates in the at least one second frequency band, so that an output impedance of the matching network circuit reaches a standard impedance.

4. The electronic device of claim 3, wherein each of the branches of the matching network circuit is connected in series with a resistance-pass sub-circuit and then an impedance matching sub-circuit:

the blocking sub-circuit is used for allowing or blocking communication signals corresponding to one frequency band or a part of frequency bands of the first frequency band and the at least one second frequency band to pass through;

the impedance matching subcircuit is used for matching the output impedance of the branch circuit to a standard impedance together with the blocking subcircuit.

5. The electronic device of claim 4, wherein the pass-blocking subcircuit comprises the band-stop filter circuit comprising an LC resonant circuit connected in series on the branch.

6. The electronic device of claim 5, wherein:

the blocking sub-circuit in the first branch circuit comprises a GPS band elimination filter circuit and is used for blocking GPS communication signals from being transmitted through the first branch circuit; and

the anti-pass sub-circuit in the second branch circuit comprises a wifi2.4G band-stop filter circuit and is used for blocking wifi2.4G transmission to pass through the second branch circuit.

7. The electronic device of claim 6, wherein the impedance matching subcircuit in the first branch comprises:

and the cutoff frequency of the first low-pass filter circuit is higher than the highest frequency of the working frequency band of the wifi2.4G communication signal and lower than the lowest frequency of the communication signal frequency band of the fifth generation mobile communication network.

8. The electronic device of claim 7, wherein the first low pass filter circuit is a circuit that first serially connects an inductor and then connects a load at the output of the first branch in parallel with a capacitor.

9. The electronic device of claim 8, wherein an output of the second branch is connected to a multipass antenna repeating switch.