Terminal antenna and electronic equipment

Abstract

The embodiment of the invention discloses a terminal antenna and electronic equipment, relates to the technical field of antennae, and aims at enabling metal materials such as a metal frame on an auxiliary screen not to generate obvious influence on normal work of a main screen antenna in a closed state through targeted setting of the metal materials on the auxiliary screen. The antenna comprises a first radiation part and a second radiation part. The first radiating portion is disposed on the first portion. The working frequency band of the first radiation part comprises a first frequency band and a second frequency band. The center frequency point of the second frequency band is higher than the first frequency band. The second radiating portion is disposed on the second portion. The second radiation part comprises at least one of at least one first radiation unit and at least one second radiation unit. The first radiation unit is provided with a grounding point. The length of the first radiation unit is smaller than 1 / 4 wavelength of the second frequency band. The second radiation unit is a suspended radiation body. The length of the second radiation unit is smaller than 1 / 2 wavelength of the second frequency band.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to a terminal antenna and an electronic device. Background Art

[0002] The wireless communication function is realized by the antenna configured in the electronic device. For foldable electronic devices, take the main screen antenna set on one side of the main screen as an example. In the closed state, the secondary screen is buckled with the main screen. The metal material on the secondary screen is close to the main screen antenna, which will significantly affect the wireless communication quality of the electronic device in the closed state. Summary of the invention

[0003] The embodiments of the present application provide a terminal antenna and an electronic device. Through the targeted setting of the metal material on the secondary screen, the metal material such as the metal frame on the secondary screen will not have a significant impact on the normal operation of the main screen antenna in a closed state.

[0004] In order to achieve the above purpose, the embodiment of the present application adopts the following technical solution:

[0005] In a first aspect, a terminal antenna is provided, which is arranged in an electronic device, and the electronic device includes a first part and a second part, and the first part and the second part are connected by a folding axis. When the electronic device is in a closed state, the first part and the second part are interlocked with each other, and when the electronic device is in an unfolded state, the first part and the second part are in the same plane. The terminal antenna includes: a first radiating part and a second radiating part. The first radiating part is arranged on the first part. At least one feeding point is arranged on the first radiating part, and the first radiating part receives a feeding signal through the at least one feeding point for radiation, and the working frequency band of the first radiating part includes a first frequency band and a second frequency band. The center frequency of the second frequency band is higher than the first frequency band. The second radiating part is arranged on the second part. When the electronic device is in a closed state, the projection of the first radiating part on the second part includes at least partial overlap with the second radiating part. The second radiating part includes at least one of the following: at least one first radiating unit and at least one second radiating unit. Wherein, a grounding point is arranged on the first radiating unit. The length of the first radiating unit is less than 1 / 4 wavelength of the second frequency band. The second radiating unit is a suspended radiator. The length of the second radiation unit is less than 1 / 2 wavelength of the second frequency band.

[0006] In this way, by configuring the second radiating part on the secondary screen to include the first radiating unit and / or the second radiating unit, even in a closed state, no current opposite to that on the first radiating part will be generated on the second radiating part, thereby avoiding the degradation of the radiation performance of the main screen antenna due to the second radiating part being close to the first radiating part.

[0007] Optionally, the electronic device includes a folding screen, the folding screen includes a main screen and a sub-screen, the main screen is correspondingly configured in the first part, and the sub-screen is correspondingly configured in the second part. Thus, an application scenario of the solution is clarified. That is, the first radiating part is configured on the main screen as the main screen antenna. The second radiating part is configured on the sub-screen.

[0008] Optionally, the first radiating part includes: a first radiator and a second radiator. One end of the first radiator is coupled to a feed source, and the other end of the first radiator is coupled to a reference ground. The end of the second radiator close to the first radiator is suspended, and the end of the second radiator away from the first radiator is coupled to a reference ground. In this way, a schematic diagram of the composition of the first radiating part corresponding to the main screen antenna is provided. Based on this composition, the first radiating part can constitute a left-hand plus parasitic structure, so that the first frequency band is covered by exciting the CM mode, and the second frequency band is covered by exciting the DM mode. It should be pointed out that in the specific implementation process of the present application, the antenna can also obtain a broadband coverage effect through left-hand mode and parasitic mode coverage. For example, the broadband part between the first frequency band and the second frequency band is jointly covered by the left-hand mode, the CM mode, the parasitic mode and the DM mode.

[0009] Optionally, the length of the first radiator corresponds to 1 / 4 wavelength of the first frequency band, and the length of the second radiator corresponds to 1 / 4 wavelength of the second frequency band. This provides a specific length definition of the first radiator and the second radiator.

[0010] Optionally, the electronic device is in a closed state. When the terminal antenna is working, the direction of the current on the second radiating part is the same as the direction of the current on the first radiating part. In this way, it is possible to avoid the occurrence of reverse current on the second radiating part, which may affect the normal radiation of the first radiating part when it approaches the first radiating part.

[0011] Optionally, the current direction on the second radiation part is the same as the current direction on the first radiation part, including: the common mode CM mode excited on the first radiation part covers the first frequency band. The current direction corresponding to the CM mode is the first direction. The current direction on the second radiation part is the first direction.

[0012] Optionally, the current direction on the second radiating part is the same as the current direction on the first radiating part, including: the differential mode DM mode excited on the first radiating part covers the second frequency band. The current direction corresponding to the DM mode is from both ends to the middle. The current direction on the second radiating part is from both ends to the middle. Alternatively, the current direction corresponding to the DM mode is from the middle to both ends. The current direction on the second radiating part is from the middle to both ends.

[0013] Optionally, the electronic device is in a closed state. The second radiation part includes at least one first radiation unit. When the electronic device is working, the first radiation unit excites a 1 / 4 wavelength mode to radiate, and the first radiation unit radiates a frequency band higher than the second frequency band.

[0014] Optionally, the electronic device is in a closed state. The second radiation part includes at least one second radiation unit. When the electronic device is working, the first radiation unit excites the 1 / 2 wavelength mode to radiate, and the second radiation unit radiates a corresponding frequency band higher than the second frequency band.

[0015] In this way, by controlling the resonance of the auxiliary screen radiator to be above the second frequency band, no reverse current will appear on the auxiliary screen radiator, thereby ensuring that when the second radiating part is close to the first radiating part, it will not affect the normal operation of the first radiating part.

[0016] Optionally, when the second radiating portion includes two or more radiating units, adjacent radiating units are separated by gaps. In different implementations, one or more first radiating units included in the second radiating portion, and / or one or more second radiating units, may be separated by gaps.

[0017] According to a second aspect, an electronic device is provided, wherein the electronic device is provided with a terminal antenna as provided in the first aspect and any possible designs thereof.

[0018] Optionally, the electronic device is a foldable device. The electronic device includes a first part and a second part, and the first part and the second part are connected by a folding axis. When the electronic device is in a closed state, the first part and the second part are interlocked with each other, and when the electronic device is in an unfolded state, the first part and the second part are in the same plane.

[0019] Optionally, when the electronic device is in an unfolded state, a signal is transmitted or received through the first radiating portion in the terminal antenna. When the electronic device is in a closed state, a signal is transmitted or received through the first radiating portion and the second radiating portion in the terminal antenna.

[0020] It should be understood that the technical solutions provided in the above-mentioned second aspect and their technical features can all correspond to the terminal antenna provided in the first aspect and its possible designs, so the beneficial effects that can be achieved are similar and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of different folding states of a foldable mobile phone;

[0022] Figure 2 A schematic diagram of a foldable mobile phone with a metal frame structure;

[0023] Figure 3 A schematic diagram of the composition of a main screen antenna of a foldable electronic device;

[0024] Figure 4 A schematic diagram of a closed state of a secondary screen of a foldable electronic device without metal material configuration;

[0025] Figure 5 for Figure 4 Schematic diagram of S-parameter simulation of the antenna composition shown;

[0026] Figure 6 for Figure 4 Schematic diagram of current simulation of the antenna composition shown;

[0027] Figure 7 A logical schematic diagram of configuring an antenna on an electronic device provided in an embodiment of the present application;

[0028] Figure 8 A schematic diagram of the logical composition of a second radiation part provided in an embodiment of the present application;

[0029] Fig. 9 A schematic diagram of an antenna solution provided in an embodiment of the present application;

[0030] Fig.10 A schematic diagram of an antenna solution provided in an embodiment of the present application;

[0031] Fig.11 A schematic diagram of S-parameter simulation provided in an embodiment of the present application;

[0032] Fig.12 A schematic diagram of an antenna solution provided in an embodiment of the present application;

[0033] Fig.13 A simulation schematic diagram provided for an embodiment of the present application;

[0034] Fig.14 A schematic diagram of an antenna solution provided in an embodiment of the present application;

[0035] Fig.15 A simulation schematic diagram provided for an embodiment of the present application;

[0036] Fig.16 A simulation schematic diagram provided for an embodiment of the present application;

[0037] Fig.17 A schematic diagram of an antenna solution provided in an embodiment of the present application;

[0038] Fig.18 A schematic diagram of S-parameter simulation provided in an embodiment of the present application;

[0039] Fig.19A schematic diagram of an antenna solution provided in an embodiment of the present application;

[0040] Fig. 20 A simulation schematic diagram provided for an embodiment of the present application;

[0041] Fig.21 A schematic diagram of an antenna solution provided in an embodiment of the present application;

[0042] Fig. 22 A schematic diagram of an antenna solution provided in an embodiment of the present application;

[0043] Fig.23 A simulation schematic diagram provided for an embodiment of the present application;

[0044] Fig.24 A schematic diagram of an antenna solution provided in an embodiment of the present application;

[0045] Fig.25 A schematic diagram of an antenna solution provided in an embodiment of the present application;

[0046] Fig.26 A schematic diagram of S-parameter simulation provided in an embodiment of the present application;

[0047] Fig. 27 A schematic diagram of an antenna solution provided in an embodiment of the present application;

[0048] Fig.28 A schematic diagram of S-parameter simulation provided in an embodiment of the present application;

[0049] Fig.29 A schematic diagram of current simulation provided in an embodiment of the present application;

[0050] Fig.30 A schematic diagram of an antenna solution provided in an embodiment of the present application;

[0051] Fig.31 A schematic diagram of S-parameter simulation provided in an embodiment of the present application. DETAILED DESCRIPTION

[0052] The electronic device may be configured with one or more antennas to achieve the transmission and reception of wireless signals. The electronic device may include a foldable device configured with a foldable screen.

[0053] The following first briefly describes the foldable device involved in the embodiments of the present application.

[0054] Exemplary, reference Figure 1 , is an example of a foldable device in different states. Here, the foldable device is a foldable mobile phone as an example. The foldable device may be configured with a foldable screen inside, and the foldable screen may include Figure 1The A screen and the B screen are shown. In different implementations, the A screen and the B screen can be different parts of the same screen, or the A screen and the B screen can also be two independent screens. Correspondingly, the outer side of the foldable device can also be configured with a display screen, such as the C screen.

[0055] In such Figure 1 In the example, screen C may be a screen arranged opposite to screen A.

[0056] like Figure 1 As shown, the state of the foldable device may include: Figure 1 The expanded state shown in (a) is as follows: Figure 1 The closed state (or folded state) shown in (c) and Figure 1 The semi-closed state (or semi-folded state) shown in (b) is between the unfolded state and the closed state.

[0057] Among them, when the foldable device is in the unfolded state, the folding angle is 180 degrees, and screen A and screen B are in the same plane.

[0058] When the foldable device is in a closed state, the folding angle is 0 degrees, screen A and screen B are interlocked with each other, and screen C is located on the appearance surface of the foldable device.

[0059] Correspondingly, when the foldable device is in a semi-closed state, the folding angle is between 0 degrees and 180 degrees.

[0060] One or more antennas may be configured in the foldable device to support the wireless communication function of the foldable device.

[0061] Take the metal frame structure of foldable devices as an example. Figure 2 A structural example of a foldable device is shown.

[0062] like Figure 2 As shown, a metal frame can be provided on the side of the foldable device, so that the side of the foldable device can have a metallic texture. In addition, since the strength of metal materials is significantly greater than that of plastic, the structural strength and stability of the foldable device are guaranteed.

[0063] In such Figure 2 In the example of FIG. 1 , one or more through slits are configured on the metal frame. The through slits can break the metal frame into multiple relatively independent metal strips. In this way, the metal strips on the metal frame can be used as the radiator of the antenna to realize the configuration of the antenna in the foldable device.

[0064] A metal middle frame may also be provided inside the metal frame. Figure 2As shown, the metal middle frame can cover most of the area of ​​the foldable device to provide overall rigid support. In some embodiments, the metal middle frame can also provide a 0 potential reference for various electrical components in the foldable device based on a larger metal area.

[0065] For example, the metal middle frame can be coupled to the antenna radiator to achieve antenna grounding. For another example, the metal middle frame can provide a zero potential reference for a printed circuit board (PCB) configured in an electronic device and various electronic devices and circuits carried on the PCB.

[0066] In such Figure 2 In the example, the electronic device may be configured with PCB21. The PCB21 may be used to carry chips, circuits, electronic devices, etc. in the foldable device. For example, a baseband chip, a radio frequency module, etc. may be configured on the PCB21. In order to facilitate the cooperation of the baseband chip and the radio frequency module, a feed signal is provided to the antenna to transmit the signal outward, or a wireless signal is received through the antenna, and the radio frequency module and the baseband chip are used to process and obtain the effective information carried in the wireless signal to achieve signal reception.

[0067] It should be pointed out that if Figure 2 The PCB 21 shown is only an example. In other implementations, the number and position of the PCBs configured in the foldable device may also be different from the PCB 21 shown in FIG. Figure 2 .

[0068] like Figure 2 As shown, a battery may also be configured in the foldable device to realize power supply for the foldable device. For example, the number of the battery may be one or more. Figure 2 In the example of FIG. 1 , the battery may include battery 22 and battery 23 , etc.

[0069] In the following description, a foldable device is assumed to have Figure 2 The architecture shown is used as an example for explanation. It is understandable that in other embodiments, the foldable device may also have other architectures. For example, the foldable device may be foldable up and down. For another example, the foldable device may be a partial metal frame architecture, or a non-metal frame architecture. The embodiments of the present application do not limit the specific implementation of the foldable device.

[0070] Combining the above Figure 1 and Figure 2 For instructions, refer to Figure 3 , taking the example of setting up an antenna on the top of a foldable device. Figure 3An example of the composition logic of an antenna ANT1 is provided. In this example, the antenna can be configured in the metal frame area at the top of the main screen. That is, the radiator of the antenna can reuse part of the metal frame at the top of the main screen. Among them, the main screen can correspond to screen A in the aforementioned example. Correspondingly, the secondary screen is screen B in the aforementioned example. In other implementations, the main screen may also correspond to screen B in the aforementioned example, and the corresponding secondary screen is screen A in the aforementioned example.

[0071] like Figure 3 As shown in FIG. 1 , one or more gaps may be provided on the metal frame at the top of the main screen. Figure 3 In the example, the antenna ANT1 can be isolated from other frames by the slots 31 and 33. A slot 32 can also be provided on the ANT1, so that the radiator of ANT1 can include two separate radiators. For example, the two radiators can include a radiator R1 and a radiator R2.

[0072] Among them, the end of the radiator R1 away from the radiator R2 is grounded. The end of the radiator R1 close to the radiator R2 is connected to the feed source. The end of the radiator R2 away from the radiator R1 is grounded. In some implementations, a capacitor in series can be set between the radiator R1 and the feed source, so that the radiator R1 can work in the left-handed mode for radiation. Correspondingly, the radiator R2 can be coupled through the gap 32 to obtain the effect of parasitic radiation. In some implementations, the width of the gap 32 can be less than or equal to 5mm. Further, the width of the gap 32 can be less than or equal to 2.5mm.

[0073] In this Figure 3 When the antenna ANT1 shown is working, the left-hand mode, the common mode (CM) mode, the parasitic mode and the differential mode (DM) mode can be excited respectively, covering at least two frequency bands. In some implementations, the at least two frequency bands may include a first frequency band and a second frequency band, and a portion between the first frequency band and the second frequency band. In other words, the antenna ANT1 can cover the frequency band between the first frequency band and the second frequency band through the left-hand mode, the CM mode, the parasitic mode and the DM mode.

[0074] It is understandable that Figure 3 The antenna ANT1 shown is only an example. The antenna ANT1 can be used to cover at least two frequency bands in 2G, 3G, 4G, 5G and / or 6G cellular communications. The antenna ANT1 can also be used to cover the 2.4 GHz or 5 GHz Wi-Fi frequency band in short-range communications, and / or the GPS frequency band, etc. In addition, in other embodiments, the antenna form configured in the foldable device can also be different from the above. Figure 3 In other embodiments, the antenna position configured in the foldable device may also be different from the antenna ANT1 shown in FIG. Figure 3 The antenna ANT1 shown is, for example, arranged on the side edge, bottom edge, etc. of the foldable device. The embodiment of the present application does not limit this.

[0075] Combination Figure 1 In the description of , when a foldable device is used, it includes at least an unfolded state and a closed state. Figure 3 In the example, in the unfolded state, the environment near the antenna ANT1 is relatively open, so it can provide better radiation performance.

[0076] In the closed state, the proximity of metal materials such as the metal frame on the secondary screen and the metal middle frame close to the top frame will have a significant impact on the operation of the antenna ANT1.

[0077] As a comparison under an ideal state, in the closed state, the area where the antenna ANT1 is projected onto the secondary screen can be configured as a non-conductive material, thereby minimizing the influence of the metal material on the secondary screen on the antenna ANT1 in the closed state.

[0078] Exemplary, reference Figure 4 , providing Figure 3 The ANT1 shown is configured in a foldable device, with illustrations of different viewing angles in a closed state.

[0079] like Figure 4 As shown in 401, in the top view, the main screen is provided with an antenna ANT1, and the corresponding area on the sub-screen does not include a radiator (ie, does not include metal material).

[0080] like Figure 4 As shown in 402, in the front view, the antenna ANT1 on the main screen can be configured in the clearance area. The clearance area can be an area outside the metal middle frame of the foldable device where no (or less) metal materials or devices are set. The reservation of the clearance area can enable the antenna (such as the antenna ANT1) to obtain better radiation space.

[0081] This has Figure 4 The foldable device in the closed state with the configuration shown in the figure has the corresponding simulation results when the antenna ANT1 is working. Figure 5 and Figure 6 shown.

[0082] It should be noted that in the following examples of the present application, all simulation examples are given based on the electronic device being in a closed state, which will not be specifically explained hereafter.

[0083] Figure 5 It shows that Figure 4 An example of S-parameter simulation of the antenna configuration shown, where the length of radiator R1 is 15 mm and the length of radiator R2 is also 15 mm.

[0084] like Figure 5 As shown in the single-port return loss (S11) curve in FIG, the antenna ANT1 can cover at least two operating frequency bands near 2.32 GHz and near 2.8 GHz. Figure 5 As shown in the system efficiency and radiation efficiency curves, when the antenna ANT1 is working, the radiation efficiency can reach more than -2dB near 2.3GHz. Correspondingly, under the current port matching state, the system efficiency can exceed -3dB near 2.3GHz and is close to -2dB. At the high frequency near 2.8GHz, the radiation efficiency can exceed -6dB and the system efficiency can be close to -6dB. Therefore, in this relatively ideal environment, the antenna ANT1 can provide better radiation performance in two working frequency bands (such as the frequency band near 2.3GHz and the frequency band near 2.8GHz).

[0085] Figure 6 Shows how the link should be Figure 4 Example of current simulation at different frequencies for the antenna configuration shown.

[0086] like Figure 6 As shown, at 2.15GHz, the current is mainly distributed on the left radiator (such as radiator R1). The current is distributed in the same direction from the feed source to the ground terminal. This distribution feature conforms to the current distribution of the left-hand mode. In other words, when the antenna ANT1 is working, the left-hand mode distributed on the radiator R1 can cover 2.15GHz.

[0087] At 2.32 GHz, the current is mainly distributed on the left radiator and the right radiator (such as radiator R2). The current is distributed in the same direction on the two radiators. This distribution characteristic radiates the current distribution of the CM mode. That is to say, when the antenna ANT1 is working, the CM mode distributed on the radiator R1 and the radiator R2 can cover 2.32 GHz.

[0088] Corresponding to Figure 5 As shown in the S11 curve, the left-hand mode and the CM mode can be used together to cover the frequency band near 2.32 GHz. Among them, the CM mode radiation contribution is greater, and the left-hand mode can be used to expand the low-frequency bandwidth.

[0089] Continue to combine Figure 6 At 2.5GHz, the current is mainly distributed on the left radiator and the right radiator (such as radiator R2). The current is distributed in the same direction on the two radiators. This distribution characteristic radiates the current distribution of the CM mode. Compared with the CM mode covering 2.32GHz, the current intensity on radiators R1 and R2 is reduced.

[0090] At 2.65 GHz, the current is mainly distributed on the right radiator (such as the radiator R2). When the antenna ANT1 is working, the parasitic mode of 1 / 4 wavelength distributed on the radiator R2 covers 2.65 GHz.

[0091] As the frequency increases further, DM mode current distribution appears on the radiator.

[0092] For example, at 2.8 GHz, the current is distributed on the radiator R1 and the radiator R2 at the same time. The current on the radiator R1 is opposite to the current on the radiator R2. This distribution feature conforms to the current distribution of the DM mode. That is, when the antenna ANT1 is working, 2.8 GHz is covered by the DM mode distributed on the radiator R1 and the radiator R2.

[0093] Furthermore, at 2.95 GHz, the current is distributed on both radiator R1 and radiator R2. The current on radiator R1 is opposite to the current on radiator R2. This distribution feature conforms to the current distribution of the DM mode. Compared with the DM mode covering 2.8 GHz, the current intensity on radiator R1 and radiator R2 is reduced.

[0094] Thus, by Figure 6 The current simulation of multiple frequency points provided can draw the following conclusions: Figure 4 In the antenna configuration shown, the antenna ANT1 can cover both the low frequency band (such as the band near 2.3 GHz) and the high frequency band (such as the band near 2.8 GHz) when working. The low frequency band can be covered by the CM mode (or the CM mode and the left-hand mode). The high frequency band can be covered by the DM mode.

[0095] The above-mentioned Figures 4 to 6 , the working condition of the antenna ANT1 in the ideal state when the foldable device is in the closed state is described in detail. It is understandable that in the actual implementation process, due to limitations such as the appearance ID, when the main screen frame is equipped with an antenna (such as the antenna ANT1), the area projected to the secondary screen by the antenna in the closed state often includes metal materials such as the secondary screen frame. In this way, compared with Figure 4 The ideal environment configuration shown will significantly affect the radiation of the antenna (such as antenna ANT1) on the main screen frame when the foldable device is in a closed state.

[0096] In order to solve the influence of metal materials such as the secondary screen frame on the main screen antenna (such as the main screen frame antenna) in the closed state, the embodiment of the present application provides an antenna solution, through the targeted configuration of the secondary screen frame, so that even in the closed state, the main screen frame antenna can also provide close to Figure 4Radiated performance for ideal environmental configuration shown.

[0097] The antenna scheme provided in the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0098] It should be noted that the electronic device in the embodiment of the present application may include at least one of a mobile phone, a foldable electronic device, a tablet computer, a desktop computer, a laptop computer, a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a cellular phone, a personal digital assistant (PDA), an augmented reality (AR) device, a virtual reality (VR) device, an artificial intelligence (AI) device, a wearable device, a vehicle-mounted device, a smart home device, or a smart city device. The embodiment of the present application does not impose any special restrictions on the specific type of the electronic device 100.

[0099] In some embodiments, the antenna solution provided in the embodiments of the present application can be applied to electronic devices configured with a folding screen (such as the above-mentioned foldable device).

[0100] As an example, an electronic device may have Figure 1 or Figure 2 Composition shown. Figure 1 and Figure 2 As described in, in the present application, the electronic device may include a metal floor structure (such as the above-mentioned metal middle frame), a PCB (such as the above-mentioned PCB21), a battery (such as the above-mentioned battery 22 and battery 23), an antenna radiation branch, a medium, etc.

[0101] In some implementations, the antenna radiation branch can be configured by reusing a metal structure on an electronic device. For example, the antenna radiation branch can be configured by reusing a metal frame. For another example, the antenna radiation branch can be formed by hollowing out a portion of a metal floor structure.

[0102] In other implementations, the antenna radiation branch can also be configured on the electronic device in other forms, for example, by a flexible printed circuit (FPC), a metal frame diecasting for anodized (MDA), a laser direct structuring (LDS), etc.

[0103] In the embodiments of the present application, Figure 7 As shown, the radiating branch (or radiator) of the antenna may include a first radiating portion and a second radiating portion. The first radiating portion may be configured in an area corresponding to the first screen (such as the first part of the electronic device), and the second radiating portion may be configured in an area corresponding to the second screen (such as the second part of the electronic device). The first screen and the second screen may be two screens that fit together when the electronic device is in a closed state. For example, the first screen may be Figure 1 The A screen, the second screen can be Figure 1 As another example, the first screen may be the main screen in the above example, and the second screen may be the secondary screen in the above example.

[0104] Taking the case where the first radiation part is arranged in the main screen area (ie the first part of the electronic device) as an example, the first radiation part can also be called the main screen radiator. Correspondingly, if the second radiation part is arranged in the auxiliary screen area, the second radiation part can also be called the auxiliary screen radiator.

[0105] When the electronic device is in a closed state, the projection of the main screen radiator onto the secondary screen at least partially overlaps with the area where the secondary screen radiator is located. In some embodiments, the projection area of ​​the main screen radiator onto the secondary screen may be included in the area where the secondary screen radiator is located. As a result, the secondary screen radiator is configured in a targeted manner so that when the electronic device is in a closed state, the radiation of the main screen radiator will not be significantly deteriorated due to the metal material on the secondary screen. In other embodiments, the projection area of ​​the main screen radiator onto the secondary screen may also be smaller than the area where the secondary screen radiator is located. In this example, the secondary screen radiator may be included in the projection area of ​​the main screen radiator onto the secondary screen. The rest can be configured as a clear area. This avoids the situation where other metal materials other than the secondary screen radiator are configured in the area close to the main screen radiator on the secondary screen when the electronic device is in a closed state, resulting in a decrease in the performance of the main screen antenna.

[0106] The following is an illustration of the main screen radiator (ie, the first radiating part) and the auxiliary screen radiator (ie, the second radiating part) in the solution provided in the embodiment of the present application.

[0107] In some embodiments, at least one feeding point may be configured on the main screen radiator. The main screen radiator may be coupled to the feed source at the location of the feeding point through electrical connection components such as metal springs. For example, the main screen radiator may be coupled to the RF link on the PCB through metal springs at the location of the feeding point. This facilitates feeding of the main screen radiator through the feed source. In other embodiments, at least one grounding point may be configured on the main screen radiator. The main screen radiator may be coupled to the reference ground on the PCB at the location of the grounding point through electrical connection components such as metal springs.

[0108] The main screen radiator, feed source, and ground point can logically constitute the main screen antenna together. In some implementations, the main screen antenna can have the following features: Figure 3 The composition of the antenna ANT1 shown. As a possible description, the main screen antenna can be described as: the main screen antenna may include a first radiator (corresponding to the radiator R1) and a second radiator (corresponding to the radiator R2). One end of the first radiator is separated from one end of the second radiator by a gap (corresponding to the gap 32). The length of the first radiator is determined according to 1 / 4 wavelength of the first frequency band, and the length of the second radiator is determined according to 1 / 4 wavelength of the second frequency band. Among them, the first frequency band and the second frequency band are the working frequency bands covered when the main screen antenna is working. The first frequency band is lower than the second frequency band in the frequency domain.

[0109] A feed source is arranged on one end of the first radiator close to the second radiator. A grounding point is arranged on one end of the first radiator away from the second radiator. An end of the second radiator close to the first radiator is an open end, and an end of the second radiator away from the first radiator is arranged with a grounding point.

[0110] In some embodiments, a matching circuit may be configured between the first radiator and the feed source. For example, the matching circuit may include a capacitor connected in series to excite the left-handed mode on the first radiator. In other embodiments, a matching circuit may also be configured between the ground point of the first radiator and / or the second radiator and the reference ground to achieve frequency domain tuning and / or port impedance tuning of the corresponding mode.

[0111] Combination Figures 3 to 6 In this example, the main screen antenna can cover the first frequency band by exciting the CM mode (or the CM mode and the left-hand mode) and cover the second frequency band by the DM mode (or the DM mode and the parasitic mode).

[0112] like Figure 7 As shown, in the embodiment of the present application, a second radiation part may also be provided on the second screen of the electronic device.

[0113] Exemplary, reference Figure 8 In an embodiment of the present application, the second radiation part (ie, the secondary screen radiator) may include a first radiation unit group and / or a second radiation unit group.

[0114] The first radiation unit group may include at least one first radiation unit. A grounding point is provided on the first radiation unit. The grounding point may be located at any position on the first radiation unit. The first radiation unit includes at least one open end. When the secondary screen radiator includes a plurality of first radiation units, the lengths of any two first radiation units may be the same or different.

[0115] In the present application, the length of any first radiation unit is less than 1 / 4 wavelength corresponding to the second frequency band.

[0116] It should be pointed out that in the description of the embodiments of the present application, the length of the radiation unit / radiator can be limitedly described by the wavelength of a certain frequency band. For example, "the length of the first radiation unit is less than 1 / 4 of the wavelength corresponding to the second frequency band" can be understood as: the length of the first radiation unit is less than the corresponding length of 1 / 4 of the wavelength corresponding to the second frequency band. It can be understood that when the first radiation unit is implemented using conductive materials with different electrical parameters such as different dielectric constants and loss tangents, the corresponding lengths of 1 / 4 of the wavelength corresponding to the corresponding second frequency band may be different. In the specific implementation process, the specific size corresponding to the 1 / 4 wavelength corresponding to the second frequency band can be determined by comprehensively calculating the electrical parameters of the conductive material used to implement the first radiation unit, combined with the 1 / 4 wavelength length of the center frequency (or endpoint frequency) of the second frequency band. In the following scheme examples, the length of the radiation unit / radiator limited by wavelength follows this description and will not be repeated.

[0117] The second radiation unit group may include at least one second radiation unit. Both ends of the second radiation unit are suspended, that is, both ends of the second radiation unit group are open ends.

[0118] In the present application, the length of any second radiation unit is less than 1 / 2 wavelength corresponding to the second frequency band.

[0119] refer to Fig. 9 , two composition examples of antennas (or terminal antennas) composed of the above-mentioned first radiation part and the second radiation part are shown.

[0120] like Fig. 9 As shown in 91, the antenna may include a first radiating portion and a second radiating portion. The first radiating portion is located on the first screen, for example, the first radiating portion is located on the top edge of the first screen. In this example, the first radiating portion has the composition characteristics of the above-mentioned antenna ANT1, and is used as a main screen antenna to cover the first frequency band and the second frequency band.

[0121] The second radiation part is located on the second screen. When the electronic device is in a closed state, the projection of the first radiation part onto the second screen at least partially overlaps with the second radiation part.

[0122] In the example of 91, the second radiation part includes two first radiation units. The two first radiation units may include a radiator 901 and a radiator 902. The length of the radiator 901 or the radiator 902 is less than 1 / 4 wavelength of the second frequency band.

[0123] like Fig. 9As shown in 92, taking the second radiation part including a second radiation unit as an example, the second radiation unit may include a radiator 903. The length of the radiator 903 is less than 1 / 2 wavelength of the second frequency band.

[0124] It can be understood that when the second radiation part, as a parasitic branch, obtains energy from the first radiation part through coupling to radiate, Fig. 9 Taking the antenna scheme 92 in the example, for the second radiating unit (such as radiator 903) in any second radiating part, since both ends are open ends, the 1 / 2 wavelength mode can be excited to work. Take the length of the second radiating unit (such as radiator 903) as length L1 as an example. Then when the second radiating unit is working, the corresponding wavelength of the resonance frequency of the fundamental mode generated should correspond to 2*L1. Combined with the above description of the second radiating unit, since the length (L1) of the second radiating unit (such as radiator 903) in this application is less than the 1 / 2 wavelength of the second frequency band, the parasitic resonance generated on the second radiating unit is higher than the second frequency band in the frequency domain. In this way, when working at a frequency lower than the second frequency band (such as the frequency band between the second frequency band and the first frequency band) in the frequency domain, the second radiating unit will not generate a current opposite to that on the first radiating part. In this way, in the frequency range lower than the second frequency band, the current generated on the second radiating unit is in the same direction as the current generated on the first radiating unit. Therefore, when the electronic device is in a closed state, even if the second radiating part is close to the first radiating part, it will not have a negative impact on the radiation of the first radiating unit (ie, the main screen antenna).

[0125] Based on similar reasons, when the second radiating portion includes the first radiating element, Fig. 9 Taking antenna scheme 91 in as an example, since one end of the first radiating unit (such as radiator 901 or radiator 902) is grounded, a 1 / 4 wavelength mode can be excited on the first radiating unit through parasitic action. Thus, in the present application, by configuring the length of the first radiating unit (such as radiator 901 and radiator 902) to be less than 1 / 4 wavelength of the second frequency, the parasitic resonance generated by the first radiating unit is higher than the second frequency band. This will also make the current distribution on the second radiating part consistent with that of the first radiating part in the frequency domain between the first frequency band and the second frequency band. Therefore, when the electronic device is in a closed state, even if the second radiating part is close to the first radiating part, it will have a negative impact on the radiation of the first radiating unit (i.e., the main screen antenna).

[0126] The following is combined with simulation comparison to explain the influence of different lengths of the radiators in the second radiating part on the overall radiation of the antenna when the second radiating part is configured with the first radiating unit or the second radiating unit, thereby supporting the above description.

[0127] For example, the second radiation part includes the first radiation unit. Fig. 9 The example of antenna scheme 91 is shown in FIG. Fig.10 .

[0128] exist Fig.10 Two antenna solutions are provided, namely antenna solution 101 and antenna solution 102. The main screen antennas in the two antenna solutions are configured the same.

[0129] In antenna scheme 101, the configuration of the second radiating portion is the same as that of antenna scheme 91. That is, in antenna scheme 101, the second radiating portion may include radiator 901 and radiator 902, and the lengths of radiator 901 and radiator 902 are both less than 1 / 4 wavelength of the second frequency band.

[0130] In the antenna solution 102, the second radiation part may include a radiator 1001 and a radiator 1002. The lengths of the radiator 1001 and the radiator 1002 are both greater than 1 / 4 wavelength of the second frequency band.

[0131] Fig.11 It shows that Fig.10 The S-parameter simulation comparison of the two antenna schemes shown.

[0132] like Fig.11 As shown in S11 in FIG. 1 , antenna solution 101 and antenna solution 102 can both resonate in a frequency band near 2.3 GHz (corresponding to the first frequency band) and resonate in a frequency band near 2.8 GHz (corresponding to the second frequency band).

[0133] In antenna solution 102, since radiators 1001 and 1002 are longer, both high-frequency resonance and low-frequency resonance are lower. It is worth noting that a parasitic resonance caused by parasitic effects of the second radiating part appears between the high-frequency resonance and the low-frequency resonance. This parasitic resonance will have a negative impact on the radiation performance within the working frequency band.

[0134] refer to Fig.11 Compared with the radiation efficiency of antenna scheme 102, antenna scheme 102 has a significant efficiency pit near 2.6 GHz where the parasitic resonance is located. Correspondingly, antenna scheme 101 does not have a significant pit in the in-band radiation efficiency because the first radiation unit is smaller than 1 / 4 wavelength of the second frequency band (i.e., the frequency band corresponding to the high-frequency resonance).

[0135] Thus, in the present application, the first radiation unit is specifically configured to be smaller than 1 / 4 wavelength of the second frequency band, so that the parasitic resonance generated by the first radiation unit can be higher than the second frequency band, thereby avoiding the influence of the second radiation part on the normal operation of the first radiation part when it is close to the first radiation part in a closed state.

[0136] In some other embodiments, the second radiation part includes a second radiation unit. Fig. 9 The example of antenna scheme 92 is shown in FIG. Fig.12 .

[0137] exist Fig.12 Two antenna solutions are provided, namely antenna solution 121 and antenna solution 122. The main screen antenna settings in the two antenna solutions are the same.

[0138] In the antenna scheme 121, the configuration of the second radiating portion is the same as that of the antenna scheme 92. That is, in the antenna scheme 121, the second radiating portion may include a radiator 903, and the length of the radiator 903 is less than 1 / 2 wavelength of the second frequency band.

[0139] In the antenna solution 122, the second radiation part may include a radiator 1201. The length of the radiation 903 is greater than 1 / 2 wavelength of the second frequency band.

[0140] Fig.13 It shows that Fig.12 The S-parameter simulation comparison of the two antenna schemes shown.

[0141] like Fig.13 S11 comparison example is shown. Antenna scheme 121 can excite the first frequency band near 2.3 GHz and the second frequency band near 2.8 GHz for operation. Antenna scheme 122 excites three resonances. The lowest resonance is covered by the CM mode of the main screen antenna. The highest resonance is covered by the DM mode of the main screen antenna. It can be understood that since the length of the radiator 1201 is greater than 1 / 2 wavelength of the second frequency band (i.e., the highest resonance mentioned above), the secondary screen parasitic mode generated by the radiator 1201 will fall between the second frequency band and the first frequency band. For example, near 2.55 GHz, there is also a secondary screen parasitic resonance generated by the secondary screen radiator (i.e., radiator 1201).

[0142] like Fig.13 An example of radiation efficiency comparison is shown. Antenna solution 122 produces a significant efficiency pit between 2.4 GHz and 2.6 GHz compared to antenna solution 121. A clear difference can also be seen in system efficiency: antenna solution 122 produces a significant efficiency pit near 2.4 GHz compared to antenna solution 121.

[0143] Fig.13 Also provided are current simulation examples at various frequencies when the antenna scheme 122 is operating.

[0144] It can be seen that at 2.14GHz, the current directions on the first radiation part and the second radiation part are the same, both of which are CM mode. At 2.4GHz, obvious reverse currents appear on the parasitic radiator (such as radiator R2) in the first radiation part and the second part. This is also one of the reasons why the efficiency of antenna scheme 122 appears to be concave near 2.4GHz. At 2.57GHz, reverse currents are distributed on the first radiation part and the second radiation part, so the radiation performance of antenna scheme 122 is also abnormally reduced in this 2.57GHz frequency band. At 2.79GHz, reverse currents are distributed on the first radiation part and the second radiation part, both of which are DM mode, and the overall current distribution on the first radiation part corresponds to the overall current distribution on the second radiation part (that is, the current direction is the same in the two corresponding areas before and after the projection of the first part to the second part), so the radiation of the second radiation part will not have a negative impact on the radiation difference of the first radiation part. Therefore, at 2.79GHz, the antenna scheme 122 can provide similar and better radiation performance as the antenna scheme 122.

[0145] Based on Fig.12 as well as Fig.13 In the present application, the second radiation unit is specifically configured to be smaller than 1 / 2 wavelength of the second frequency band, which can effectively avoid the influence of the second radiation part approaching the first radiation part on the normal operation of the first radiation part in the closed state. For example, the radiation effect shown in antenna scheme 121 is obtained.

[0146] The above-mentioned Figure 10 to Figure 13 For example, Fig. 9 In the illustrated solution example, the configuration mechanism of the first radiation unit and the second radiation unit in the second radiation part is briefly described.

[0147] It should be noted that the embodiment of the present application does not limit the number of the first radiation unit and / or the second radiation unit in the second radiation part. In the case where the second radiation part includes multiple units, the multiple units may be separated by gaps.

[0148] For example, the second radiation part includes a second radiation unit. Fig.14 , provides a schematic diagram of the composition of two antenna schemes. Fig.14 In the example, antenna scheme 141 and antenna scheme 142 may be included.

[0149] The antenna composition of the antenna scheme 141 may correspond to the aforementioned Fig. 9 An example of antenna scheme 92 in FIG.

[0150] In antenna solution 142, the second radiation part may include two second radiation units. For example, radiator 1401 and radiator 1402. The lengths of radiator 1401 and radiator 1402 are both less than 1 / 2 wavelength of the second frequency band. Fig.14 As shown, the long sides of the radiator 1401 and the radiator 1402 can be arranged on a straight line, and the two radiators are separated by a gap.

[0151] Fig.15 Provides an antenna scheme 141 and Figure 4 The simulation comparison of the ideal parasitic-free solution is shown in Fig.16 A simulation comparison of the antenna solution 142 and the non-parasitic solution is provided. Fig.14 In the two implementation schemes, when the second radiation part includes one or more second radiation units, the antenna can obtain radiation performance that is basically the same as or similar to that of the parasitic-free solution.

[0152] The following explains them respectively.

[0153] refer to Fig.15 , an S-parameter simulation comparison of the antenna scheme 141 and the parasitic-free scheme as well as a current simulation example are provided.

[0154] like Fig.15 As shown in S11 in FIG. 1 , after the second radiating part is added to the antenna solution 141, both resonance depths are improved to a certain extent, and the bandwidth is also optimized to a certain extent. From the perspective of radiation efficiency, in the antenna solution 141 with the second radiating part added, the radiation efficiency in the entire frequency band is not lower than that of the parasitic-free solution. From the perspective of system efficiency, the efficiency peak and efficiency bandwidth of the antenna solution 141 are basically the same as those of the parasitic-free solution.

[0155] Therefore, when the antenna solution 141 is working, it can provide radiation performance similar to that of the case where no metal material is set (such as the parasitic-free solution) while realizing the setting of metal material on the secondary screen (such as the second radiation part).

[0156] Fig.15 Also provided are current simulation examples corresponding to various frequency points when the antenna scheme 141 is working.

[0157] At 2.24 GHz, the two radiations of the first radiation part are directly distributed with currents in the same direction, which is a CM mode. In addition, the current direction on the second radiation part is the same as the current direction on the first radiation part. Therefore, at 2.24 GHz, the setting of the second radiation part will not have a negative impact on the normal radiation of the first radiation part.

[0158] At 2.77 GHz, the two radiations of the first radiation part are directly distributed with reverse currents, which is a DM mode. The local current direction on the second radiation part is the same as the current direction of the corresponding position on the first radiation part (such as both from right to left). There is no significant current distribution in the other part of the second radiation part. Therefore, at this 2.77 GHz, the setting of the second radiation part will not have a negative impact on the normal radiation of the first radiation part.

[0159] At 2.9GHz, a branch (such as a parasitic branch) of the first radiating part is distributed with a current from left to right, and a corresponding current is distributed from right to left on the second radiating part. The currents on the two radiating parts are reversed. However, since the 2.9GHz is already higher than the second frequency band (such as around 2.8GHz), the parasitic mode corresponding to the current 2.9GHz is displayed outside the working frequency band on S11. In this way, even if the performance of the parasitic mode is degraded due to the reverse current, it will not have a substantial impact on the normal operation of the antenna 141.

[0160] In addition, if Fig.15 As shown, at a higher 2.95 GHz, the second radiation part can also stimulate an obvious 1 / 2 wavelength mode to operate.

[0161] Based on the above simulation description of the antenna solution 141, it can be seen that in the working frequency band (such as the frequency band covered by the CM mode and the DM mode), the currents on the first radiating part and the second radiating part are both corresponding unidirectional currents. Therefore, in terms of S parameters, the antenna solution 141 can be shown to have good radiation performance.

[0162] refer to Fig.16 , which is a simulation comparison example of antenna solution 142 and a parasitic-free solution. Compared with antenna solution 141, the second radiation part of antenna solution 142 may include two second radiation units.

[0163] like Fig.16 As shown in S11 in FIG. 1 , in antenna solution 142, both resonance depths are improved to a certain extent, and the bandwidth is also optimized to a certain extent. From the perspective of radiation efficiency, in antenna solution 142 with a second radiation part, the radiation efficiency in the entire frequency band is not lower than that of the parasitic-free solution. From the perspective of system efficiency, the efficiency peak and efficiency bandwidth of antenna solution 142 are basically the same as those of the parasitic-free solution.

[0164] Therefore, when the antenna scheme 142 is working, it can provide radiation performance similar to that of the case where no metal material is set (such as a parasitic-free scheme) while realizing the setting of metal material on the secondary screen (such as a second radiation part including two second radiation units).

[0165] Fig.16Also provided are current simulation examples corresponding to various frequency points when the antenna scheme 142 is working.

[0166] At 2.2 GHz, the two radiations of the first radiation part directly distribute the current in the same direction, which is the CM mode. In addition, there is no significant current distribution on the second radiation part, which will not affect the radiation of the first radiation part at this frequency.

[0167] At 2.3 GHz, the two radiations of the first radiation part are directly distributed with currents in the same direction, which is a CM mode. The two second radiation units on the second radiation part are also distributed with currents in the same direction as the first radiation part. Therefore, at 2.3 GHz, the setting of the second radiation part will not have a negative impact on the normal radiation of the first radiation part.

[0168] At 2.6 GHz, a branch (such as a parasitic branch) of the first radiation part has a current distributed from right to left, and there is no significant current distribution on the second radiation part, which will not affect the radiation of the first radiation part at this frequency.

[0169] At 2.7 GHz, the two radiations of the first radiation part directly distribute reverse currents, which is a DM mode. There is no significant current distribution on the second radiation part, which will not affect the radiation of the first radiation part at this frequency.

[0170] At 2.7 GHz, the two radiations of the first radiation part are directly distributed with reverse currents, which is a DM mode. The two second radiation units on the second radiation part are also distributed with DM mode currents in the same direction as the first radiation part. Therefore, at 2.3 GHz, the setting of the second radiation part will not have a negative impact on the normal radiation of the first radiation part.

[0171] Based on the above simulation description of antenna scheme 142, it can be seen that Fig.15 Similar to the antenna solution 141, when the antenna solution 142 is working, in the working frequency band (such as the frequency band covered by the CM mode and the DM mode), the currents on the first radiation part and the second radiation part are both corresponding unidirectional currents. Therefore, in terms of S parameters, the antenna solution 141 can be shown to have good radiation performance.

[0172] Combined with the above Figure 14 to Figure 16 It is explained that, when the second radiation part includes second radiation units, the number of second radiation units and the specific size difference of each second radiation unit (as long as it is smaller than 1 / 2 wavelength of the second frequency band) will not have a significant impact on the actual operation of the antenna.

[0173] In some other embodiments, the second radiation part may further include more second radiation units.

[0174] Exemplary, reference Fig.17 .like Fig.17 In the provided antenna solution 171, the second radiation part may include four second radiation units separated by three gaps. The length of each second radiation unit is less than 1 / 2 wavelength of the second frequency band.

[0175] like Fig.17 In the provided antenna solution 172, the second radiation part may include eight second radiation units separated by seven slots. The length of each second radiation unit is less than 1 / 2 wavelength of the second frequency band.

[0176] Fig.18 Provides such as Fig.17 An example of S11 comparison of the two antenna solutions shown. Fig.18 It is also shown in the above example that Fig. 9 S11 of the antenna solution 92 is shown as a comparison. It can be seen that when the number of second radiating units included in the second radiating part is 1, 4 or 7, S11 is basically the same, and the radiation effects of the three antenna solutions are basically the same. In other words, the number of second radiating units does not have a direct impact on the overall radiation effect of the antenna.

[0177] In the above examples, the boundary of the second radiation unit or the first radiation unit in the second radiation part does not exceed the first radiation part. For example, in any of the above antenna solutions provided in the present application, when the electronic device is in a closed state, the projection of the first radiation part to the secondary screen is substantially the same size as the area where the second radiation part is located.

[0178] In some other embodiments of the present application, the second radiation portion may also be configured to have a projection area larger than that of the first radiation portion.

[0179] Exemplary, reference Fig.19 In the antenna scheme 191, the second radiation part may include a plurality of second radiation units, and the projection area of ​​the second radiation part exceeds the first radiation part.

[0180] refer to Fig. 20 , which is an S parameter and current simulation example corresponding to the antenna scheme 191.

[0181] like Fig. 20 As shown in S11 in FIG. 1 , antenna solution 191 and antenna solution 92 substantially overlap in S11. In other words, the second radiating portion is arranged beyond the first radiating portion, and the effect of the second radiating portion being arranged corresponding to the first radiating portion is substantially the same. Fig. 20As shown in the current simulation, when the antenna scheme 191 is working, it can work in the CM mode at 2.3GHz and in the DM mode at 2.8GHz. At 2.3GHz and 2.8GHz, there is basically no significant current distribution on the branches of the second radiation part that exceed the first radiation part. Therefore, even if the second radiation part is set beyond the projection area of ​​the first radiation part, it will not have a negative impact on the normal radiation of the first radiation part.

[0182] It is understandable that the above Figures 14 to 20 In the embodiment, various deformation solutions of the case where the second radiation part includes the second radiation unit are described. Based on similar principles, when the second part includes the first radiation unit, the deformation can also be performed accordingly to obtain a similar radiation effect.

[0183] In some other embodiments of the present application, the second radiation part may also include one or more first radiation units and one or more second radiation units at the same time.

[0184] Exemplary, reference Fig.21 .Should Fig.21 The provided antenna scheme may be referred to as antenna scheme 211 .

[0185] In antenna solution 211, the first radiating part is still configured in the area corresponding to the first screen. The second radiating part is configured in the area corresponding to the second screen. After the electronic device is closed, the second radiating part is included in the projection area of ​​the first radiating part onto the second screen.

[0186] In this Fig.21 In the example of, the second radiation part may include three first radiation units and three second radiation units. The first radiation units and the second radiation units may be arranged alternately in sequence.

[0187] It can be understood that, since the length of the first radiation unit is less than 1 / 4 wavelength of the second frequency band, the length of the second radiation unit is less than 1 / 2 wavelength of the second frequency band. Fig.21 When the antenna solution 211 shown is working, the setting of the second radiating part will not have a negative impact on the normal radiation of the first radiating part.

[0188] In some other embodiments of the present application, the configuration of the first radiation unit and the second radiation unit in the second radiation part may also be different from the example of the antenna scheme 211.

[0189] Exemplary, reference Fig. 22 , yet another example of an antenna scheme 221 is provided.

[0190] like Fig. 22As shown, in this example, the second radiation part may include first radiation units arranged at both ends, and three second radiation units arranged between the two first radiation units.

[0191] Fig.23 A simulation example of this antenna scheme 221 is provided.

[0192] like Fig.23 S parameter simulation results. From the perspective of S11, the S11 of the antenna solution 211 is basically the same as that of the non-parasitic solution. From the perspective of radiation efficiency, the radiation efficiency of the antenna solution 211 is basically the same as that of the non-parasitic solution. From the perspective of system efficiency, the system efficiency of the antenna solution 211 is basically the same as that of the non-parasitic solution.

[0193] That is to say, in the antenna scheme 221, when the second radiation part includes multiple first radiation units and second radiation units, it can also provide a radiation effect similar to that of the parasitic-free scheme.

[0194] exist Fig.23 The current distribution at each frequency point when the antenna scheme 221 is working is also provided.

[0195] At 2.2 GHz, the first radiating portion operates in CM mode, and there is no significant current distribution in the second radiating portion.

[0196] At 2.32 GHz, the first radiating portion operates in CM mode, and the second radiating portion is distributed with a current in the same direction as that of the first radiating portion.

[0197] At 2.6 GHz, the parasitic branches on the first radiation part radiate through the parasitic mode (also called the main screen parasitic mode). There is no significant current distribution on the second radiation part.

[0198] At 2.8 GHz, the first radiating portion operates in DM mode, and the second radiating portion is distributed with a current in the same direction as that of the first radiating portion.

[0199] It can be seen that within the operating frequency band of 2.2 GHz to 2.8 GHz, there is either no significant current distribution on the second radiating part, or there is current distributed in the same direction as that on the first radiating part. Therefore, in the antenna scheme 221, even if the second radiating part includes both the first radiating unit and the second radiating unit, it is possible to avoid the situation where the second radiating part is close to the first radiating part and affects the normal operation of the first radiating part.

[0200] In combination with the above description of various examples of the second radiation part including both the first radiation unit and the second radiation unit, in different implementations of the embodiments of the present application, the number of the first radiation unit, the number of the second radiation unit, and the relative positions of the first radiation unit and the second radiation unit in the second radiation part are not limited.

[0201] As an example, refer to Fig.24 In this Fig.24 In the provided antenna solution 241, the second radiating portion may include a first radiating unit and three second radiating units. The first radiating unit may be arranged in the second radiating portion at a position corresponding to the projection of the ground point on the first radiating portion. The second radiating units are sequentially distributed on the same side of the first radiating unit. The second radiating portion is included in the projection area of ​​the first radiating portion onto the second screen.

[0202] It is understandable that Fig.24 In the provided antenna scheme 241, the length of the first radiation unit is less than 1 / 4 wavelength of the second frequency band, and the length of the second radiation unit is less than 1 / 2 wavelength of the second frequency band. Therefore, a similar radiation effect provided by any of the aforementioned embodiments can be obtained. As a specific example, in the first radiation part, the length of the radiation branch coupled to the feed source is configured to be 18.75mm, and the length of the parasitic branch in the first radiation part is configured to be 18mm. In the second radiation part, the length of the first radiation unit is configured to be 3mm, and the three second radiation units are configured to be 8mm, 11mm and 7mm respectively. Based on this specific size configuration, it can correspond to the length of the first radiation unit being less than 1 / 4 wavelength of the second frequency band, and the length of the second radiation unit being less than 1 / 2 wavelength of the second frequency band, so a radiation effect similar to that of a parasitic-free scheme can be obtained.

[0203] Above Figures 8 to 24 The antenna operation is described for various configurations of the second radiating portion in the embodiments of the present application. It is understood that the solution is not limited to the first radiating portion having Figure 3 The composition of ANT1 shown. In other implementations, the first radiating part may also have any other antenna structure. Correspondingly, the second frequency band in the above example can be a frequency band with the highest center frequency in one or more working frequency bands when the first part is radiating. In this way, no matter what antenna form the first radiating part is configured as, when the corresponding area of ​​the second screen (that is, the secondary screen area) is configured with metal material (such as the second radiating part), the parasitic resonance of the second radiating part can be controlled to be higher than the second frequency, thereby obtaining radiation performance similar to that of the parasitic-free solution. That is to minimize the radiation effect of the metal material set in the secondary screen area on the main screen antenna.

[0204] As a comparison, Fig.25Another solution for setting metal branches on the secondary screen is provided. Fig.25 The provided antenna scheme may be referred to as antenna scheme 251 .

[0205] like Fig.25 As shown, unlike the technical solution of setting the second radiating part on the second screen (i.e., the secondary screen) in the present application, in the antenna solution 251, two metal branches with both ends grounded are set in the area corresponding to the main screen antenna (i.e., the projection area of ​​the main screen antenna to the secondary screen when the electronic device is in the closed state).

[0206] The technical implementation of grounding the metal branches near the antenna is commonly seen in the processing of metal materials in the space near the antenna, so as to avoid the metal branches coupling the energy radiated by the antenna and having a negative impact on the normal radiation of the antenna.

[0207] Fig.26 Provides such as Fig.25 Simulation example of the illustrated scheme.

[0208] like Fig.26 As shown, from the perspective of S11, the low-frequency resonance of antenna solution 251 shifts toward high frequency compared to the solution without sub-screen branches (i.e., the above-mentioned solution without parasitics). From the perspective of radiation efficiency, antenna solution 251 has at least 1dB deterioration compared to the solution without sub-screen branches. From the perspective of system efficiency, antenna solution 251 has deteriorated in both efficiency peak and efficiency bandwidth compared to the solution without sub-screen branches. This can be explained as follows: in the closed state, since the grounded sub-screen metal branches are close to the antenna radiator, part of the antenna radiation directly flows back to the reference ground, thereby causing the radiation performance to deteriorate.

[0209] In some implementations, based on antenna scheme 251, tuning components such as inductors, capacitors and / or resistors may also be configured at the grounding position of the secondary screen branch to move the invalid resonance generated by the secondary screen branch out of the operating frequency band.

[0210] Exemplary, reference Fig. 27 The antenna scheme 271 is provided. On the two radiators in the auxiliary screen branch, the ends close to each other are respectively provided with tuning components before being grounded. Thus, by adjusting the tuning components, the radiation performance of the electronic device in the closed state is optimized.

[0211] Fig.28 Provides such as Fig. 27 Example of S-parameter simulation of the antenna shown in operation.

[0212] like Fig.28As shown in the figure, by adjusting the tuning components, S11 can cover the frequency bands from 2.2GHz to 2.3GHz, and around 2.8GHz. On S11, parasitic resonance also appears around 2.45GHz. From the perspective of radiation efficiency and system efficiency, there are significant efficiency pits between parasitic resonance and low-frequency resonance, and between parasitic resonance and high-frequency resonance.

[0213] Fig.29 Provides such as Fig. 27 An example of current simulation at various frequencies when the antenna solution shown is operating.

[0214] At 2.26GHz, both the auxiliary screen branch and the main screen branch radiate through the CM mode. The current direction of the auxiliary screen branch and the main screen branch is the same. At this time, the auxiliary screen branch has no significant effect on the radiation of the main screen antenna.

[0215] At 2.42GHz, both the auxiliary screen branch and the main screen branch radiate through the CM mode. The current directions on the auxiliary screen branch and the main screen branch are opposite. At this time, the auxiliary screen branch has a significant impact on the radiation of the main screen antenna.

[0216] At 2.6GHz, the current is mainly distributed on the parasitic branches of the main screen branches for radiation.

[0217] At 2.78GHz, both the auxiliary screen branch and the main screen branch radiate through the DM mode. The current direction of the auxiliary screen branch and the main screen branch is the same. At this time, the auxiliary screen branch has no significant effect on the radiation of the main screen antenna.

[0218] At 2.87 GHz, the current is mainly distributed on the main screen branches and radiates through the DM mode.

[0219] It can be seen that in the frequency band covered by the CM mode, a reverse current relative to the main screen branch will be generated on the auxiliary screen branch, resulting in deterioration of the performance of the low-frequency part in the working frequency band.

[0220] In order to more clearly illustrate the beneficial effects that can be obtained by the antenna solution provided in the embodiment of the present application, the implementation effects of the various antenna solutions provided in the aforementioned embodiments are compared below. It is clear that, through the antenna solution provided in the embodiment of the present application, when a metal material (such as the second radiation part) is set in the corresponding area of ​​the secondary screen (second screen), a radiation performance similar to that of the parasitic-free solution can be obtained.

[0221] refer to Fig.30 When the area on the secondary screen corresponding to the main screen antenna is configured with metal material (such as a metal frame), several different antenna solutions are implemented.

[0222] In this example, the suspended parasitic solution provided in the embodiment of the present application is provided in antenna solution 142. That is, the second radiation part may include two second radiation units.

[0223] The parasitic-free solution is to configure the antenna radiator only on the main screen, and leave the corresponding area on the secondary screen empty, so as to obtain the best radiation performance. The performance of other antenna solutions needs to be as close to the parasitic-free solution as possible.

[0224] Antenna solution 251 is also a parasitic grounding solution. Fig.25 As described in the description, in this solution, the secondary screen branch may include two grounded branches. So as to avoid the influence of the secondary screen branch on the main screen antenna through grounding.

[0225] Antenna solution 271 is also a dual parasitic tuning solution. Based on antenna solution 251, a tuning component is added to tune the parasitic resonance generated by the secondary screen branches to between the first frequency band and the second frequency band, thereby avoiding the influence of the parasitic resonance on the normal radiation of the first frequency band and the second frequency band.

[0226] Should Fig.30 An example of a single parasitic tuning solution is also provided. Based on antenna solution 271, this solution reduces the configuration of one tuning component and reduces the cost of implementing the antenna solution.

[0227] Fig.31 Provides the Fig.30 Efficiency simulation comparison of various antenna solutions shown.

[0228] like Fig.31 As shown, in terms of radiation efficiency, in the single parasitic tuning scheme and the double parasitic tuning scheme, although the parasitic resonance is tuned to between the first frequency band and the second frequency band, the radiation efficiency of the first frequency band is improved. However, the radiation efficiency of the second frequency band is greatly deteriorated compared with the non-parasitic scheme. The parasitic grounding scheme is significantly deteriorated compared with the non-parasitic scheme in both the first and second frequency bands. The suspended parasitic scheme, which is one of the schemes provided in the embodiment of the present application, can obtain the effect closest to the non-parasitic scheme in the first and second frequency bands in terms of radiation efficiency.

[0229] In terms of system efficiency, similar to radiation efficiency, the suspended parasitic solution is the closest to the parasitic-free solution in all parts of the operating frequency band among all the solution implementations.

[0230] It can be understood that, in combination with the above description of the deformation of various antenna solutions provided in the embodiments of the present application, various antenna solutions provided in the embodiments of the present application that meet the above-mentioned second radiation part configuration can obtain radiation effects similar to the suspended parasitic solution. Compared with other solutions (such as parasitic grounding, etc.), it can provide better radiation performance. At the same time, there is no need to add tuning components, so the corresponding hardware overhead and the overhead of the layout area on the PCB can be saved.

[0231] It should be understood that although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A terminal antenna, characterized in that: The terminal antenna is arranged in an electronic device, the electronic device comprises a first part and a second part, the first part and the second part are connected via a folding axis; when the electronic device is in a closed state, the first part and the second part are buckled with each other, and when the electronic device is in an unfolded state, the first part and the second part are in the same plane; The terminal antenna comprises: a first radiating part and a second radiating part; The first radiating part is arranged on the first part; at least one feeding point is arranged on the first radiating part, the first radiating part receives a feeding signal through the at least one feeding point for radiation, the working frequency band of the first radiating part includes a first frequency band and a second frequency band; the center frequency point of the second frequency band is higher than the first frequency band; The second radiating portion is arranged on the second portion; when the electronic device is in a closed state, the projection of the first radiating portion on the second portion at least partially overlaps with the second radiating portion; The second radiation portion includes at least one of the following: at least one first radiation unit, at least one second radiation unit; Wherein, a grounding point is provided on the first radiation unit; the length of the first radiation unit is less than 1 / 4 wavelength of the second frequency band; The second radiation unit is a suspended radiator; the length of the second radiation unit is less than 1 / 2 wavelength of the second frequency band.

2. The terminal antenna according to claim 1, characterized in that: The electronic device includes a folding screen, and the folding screen includes a main screen and a sub-screen. The main screen is correspondingly configured in the first part, and the sub-screen is correspondingly configured in the second part.

3. The terminal antenna according to claim 1 or 2, characterized in that: The first radiating part includes: a first radiator and a second radiator; One end of the first radiator is coupled to a feed source, and the other end of the first radiator is coupled to a reference ground; One end of the second radiator close to the first radiator is suspended, and one end of the second radiator away from the first radiator is coupled to a reference ground.

4. The terminal antenna according to claim 3, characterized in that: The length of the first radiator corresponds to 1 / 4 of the wavelength of the first frequency band, and the length of the second radiator corresponds to 1 / 4 of the wavelength of the second frequency band.

5. The terminal antenna according to any one of claims 1 to 4, characterized in that: The electronic device is in a closed state; When the terminal antenna is working, the direction of the current on the second radiating part is the same as the direction of the current on the first radiating part.

6. The terminal antenna according to claim 5, characterized in that: The direction of the current on the second radiation part is the same as the direction of the current on the first radiation part, including: The excited common mode CM mode on the first radiation part covers the first frequency band; the current direction corresponding to the CM mode is the first direction; The direction of the current on the second radiation part is the first direction.

7. The terminal antenna according to claim 5, characterized in that: The direction of the current on the second radiation part is the same as the direction of the current on the first radiation part, including: The differential mode DM mode excited on the first radiation part covers the second frequency band; The current direction corresponding to the DM mode is from both ends to the middle; the current direction on the second radiation part is from both ends to the middle; or, The current direction corresponding to the DM mode is from the middle to both ends; the current direction on the second radiation part is from the middle to both ends.

8. The terminal antenna according to any one of claims 1 to 7, characterized in that: The electronic device is in a closed state; The second radiation part includes at least one first radiation unit; When the electronic device is working, the first radiation unit excites a 1 / 4 wavelength mode to radiate, and the frequency band corresponding to the radiation of the first radiation unit is higher than the second frequency band.

9. The terminal antenna according to any one of claims 1 to 8, characterized in that: The electronic device is in a closed state; The second radiation part includes at least one second radiation unit; When the electronic device is working, the first radiation unit excites the 1 / 2 wavelength mode to radiate, and the second radiation unit radiates a corresponding frequency band higher than the second frequency band.

10. The terminal antenna according to any one of claims 1 to 9, characterized in that: When the second radiation part includes two or more radiation units, adjacent radiation units are separated by gaps.

11. An electronic device, characterized in that: The electronic device is provided with a terminal antenna as described in any one of claims 1-10.

12. The electronic device according to claim 11, characterized in that: The electronic device is a foldable device; The electronic device comprises a first part and a second part, wherein the first part and the second part are connected via a folding axis; when the electronic device is in a closed state, the first part and the second part are interlocked with each other, and when the electronic device is in an unfolded state, the first part and the second part are in the same plane.

13. The electronic device according to claim 12, characterized in that: When the electronic device is in an unfolded state, signals are transmitted or received through the first radiating part in the terminal antenna; when the electronic device is in a closed state, signals are transmitted or received through the first radiating part and the second radiating part in the terminal antenna.

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