Terminal antenna and electronic device

Abstract

Embodiments of the present application relate to the technical field of antennas, and disclose a terminal antenna and an electronic device. By means of targeted arrangement of metallic material on a secondary screen, the metallic material such as a metallic bezel on the secondary screen does not significantly affect normal operation of a primary screen antenna in a closed state. The solution comprises a first radiation part and a second radiation part. The first radiation part is disposed on a first part. The first radiation part has an operating frequency band comprising a first frequency band and a second frequency band. The second frequency band has a central frequency channel higher than that of the first frequency band. The second radiation part is disposed on a second part. The second radiation part comprises at least one of the following: at least one first radiation unit and at least one second radiation unit. A ground point is disposed 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 radiating element. The length of the second radiation unit is less than 1 / 2 wavelength of the second frequency band.

Description

Terminal antenna and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on August 30, 2023, with application number 202311104950.4 and invention name “A Terminal Antenna and Electronic Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of antenna technology, and in particular to a terminal antenna and electronic equipment. Background Art

[0003] Wireless communication is achieved through antennas installed in electronic devices. For example, in foldable electronic devices, a main screen antenna is located on one side of the main screen. When the device is closed, the secondary screen snaps onto the main screen. The proximity of metal materials on the secondary screen to the main screen antenna significantly affects the quality of wireless communication when the device is closed.

[0004] Summary of the Invention

[0005] The embodiments of the present application provide a terminal antenna and an electronic device. By 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 the closed state.

[0006] In order to achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0007] In a first aspect, a terminal antenna is provided. The terminal antenna is disposed in an electronic device. The electronic device includes a first portion and a second portion, the first portion and the second portion being connected by a folding axis. When the electronic device is closed, the first portion and the second portion interlock with each other. When the electronic device is unfolded, the first portion and the second portion lie in the same plane. The terminal antenna includes a first radiating portion and a second radiating portion. The first radiating portion is disposed on the first portion. The first radiating portion is provided with at least one feed point. The first radiating portion receives a feed signal through the at least one feed point and radiates. The operating frequency bands of the first radiating portion include a first frequency band and a second frequency band. The center frequency of the second frequency band is higher than that of the first frequency band. The second radiating portion is disposed on the second portion. When the electronic device is closed, the projection of the first radiating portion on the second portion at least partially overlaps with the second radiating portion. The second radiating portion includes at least one of the following: at least one first radiating element and at least one second radiating element. The first radiating element is provided with a grounding point. The length of the first radiating element is less than 1 / 4 wavelength of the second frequency band. The second radiating element is a suspended radiator. The length of the second radiation unit is less than 1 / 2 wavelength of the second frequency band.

[0008] In this way, by configuring the second radiating part on the secondary screen to include a first radiating unit and / or a second radiating unit, even in a closed state, no current opposite to that of 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 caused by the second radiating part being close to the first radiating part.

[0009] Optionally, the electronic device includes a foldable screen, which includes a main screen and a secondary screen. The main screen is correspondingly configured in the first portion, and the secondary screen is correspondingly configured in the second portion. This clarifies an application scenario of this solution. That is, the first radiating portion is configured on the main screen as the main screen antenna. The second radiating portion is configured on the secondary screen.

[0010] Optionally, the first radiating part includes: a first radiator and a second radiator. One end of the first radiator is coupled to the feed source, and the other end of the first radiator is coupled to the reference ground. The second radiator is suspended at one end close to the first radiator, and the end of the second radiator away from the first radiator is coupled to the 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, thereby covering the first frequency band by exciting the CM mode and covering the second frequency band 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, CM mode, parasitic mode and DM mode.

[0011] 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 for the first radiator and the second radiator.

[0012] Optionally, the electronic device is in a closed state. When the terminal antenna is operating, the direction of the current in the second radiating portion is the same as the direction of the current in the first radiating portion. This prevents the second radiating portion from affecting the normal radiation of the first radiating portion due to the occurrence of reverse current when the second radiating portion is close to the first radiating portion.

[0013] Optionally, the direction of the current in the second radiating portion is the same as the direction of the current in the first radiating portion, including: a common mode (CM) excited on the first radiating portion covers the first frequency band, the current direction corresponding to the CM mode is the first direction, and the current direction in the second radiating portion is the first direction.

[0014] Optionally, the direction of the current on the second radiating portion is the same as the direction of the current on the first radiating portion, including: a differential mode (DM) pattern excited on the first radiating portion covers the second frequency band. The current direction corresponding to the DM pattern is from both ends to the middle. The current direction on the second radiating portion is from both ends to the middle. Alternatively, the current direction corresponding to the DM pattern is from the middle to both ends. The current direction on the second radiating portion is from the middle to both ends.

[0015] Optionally, the electronic device is in a closed state. The second radiating portion includes at least one first radiating unit. When the electronic device is in operation, the first radiating unit excites a 1 / 4 wavelength mode to radiate, and the first radiating unit radiates a frequency band higher than the second frequency band.

[0016] Optionally, the electronic device is in a closed state. The second radiating portion includes at least one second radiating unit. When the electronic device is in operation, the first radiating unit excites a 1 / 2 wavelength mode to radiate, and the second radiating unit radiates a frequency band higher than the second frequency band.

[0017] In this way, by controlling the resonance of the secondary screen radiator to be above the second frequency band, no reverse current will appear on the secondary 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.

[0018] Optionally, when the second radiating portion includes two or more radiating elements, adjacent radiating elements are separated by a gap. In different implementations, one or more first radiating elements and / or one or more second radiating elements included in the second radiating portion may be separated by a gap.

[0019] In a second aspect, an electronic device is provided, wherein the electronic device is provided with the terminal antenna provided in the first aspect and any possible design thereof.

[0020] Optionally, the electronic device is a foldable device. The electronic device includes a first portion and a second portion, the first portion and the second portion being connected by a folding axis. When the electronic device is in a closed state, the first portion and the second portion are interlocked, and when the electronic device is in an unfolded state, the first portion and the second portion are in the same plane.

[0021] Optionally, when the electronic device is in the unfolded state, signals are transmitted or received through the first radiating portion of the terminal antenna. When the electronic device is in the closed state, signals are transmitted or received through the first radiating portion and the second radiating portion of the terminal antenna.

[0022] It should be understood that the technical solutions provided in the above-mentioned second aspect and their technical features can 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

[0023] FIG1 is a schematic diagram of a foldable mobile phone in different folding states;

[0024] FIG2 is a schematic diagram of a foldable mobile phone with a metal frame structure;

[0025] FIG3 is a schematic diagram of the composition of a main screen antenna of a foldable electronic device;

[0026] FIG4 is a schematic diagram of a closed state of a foldable electronic device in which no metal material is configured on the secondary screen;

[0027] FIG5 is a schematic diagram of an S-parameter simulation of the antenna components shown in FIG4 ;

[0028] FIG6 is a schematic diagram of current simulation of the antenna structure shown in FIG4 ;

[0029] FIG7 is a logic diagram of configuring an antenna on an electronic device according to an embodiment of the present application;

[0030] FIG8 is a schematic diagram of the logical composition of a second radiating portion provided in an embodiment of the present application;

[0031] FIG9 is a schematic diagram of an antenna solution provided in an embodiment of the present application;

[0032] FIG10 is a schematic diagram of an antenna solution provided in an embodiment of the present application;

[0033] FIG11 is a schematic diagram of an S-parameter simulation provided in an embodiment of the present application;

[0034] FIG12 is a schematic diagram of an antenna solution provided in an embodiment of the present application;

[0035] FIG13 is a simulation diagram provided in an embodiment of the present application;

[0036] FIG14 is a schematic diagram of an antenna solution provided in an embodiment of the present application;

[0037] FIG15 is a schematic diagram of a simulation provided by an embodiment of the present application;

[0038] FIG16 is a schematic diagram of a simulation provided by an embodiment of the present application;

[0039] FIG17 is a schematic diagram of an antenna solution provided in an embodiment of the present application;

[0040] FIG18 is a schematic diagram of an S-parameter simulation provided in an embodiment of the present application;

[0041] FIG19 is a schematic diagram of an antenna solution provided in an embodiment of the present application;

[0042] FIG20 is a schematic diagram of a simulation provided in an embodiment of the present application;

[0043] FIG21 is a schematic diagram of an antenna solution provided in an embodiment of the present application;

[0044] FIG22 is a schematic diagram of an antenna solution provided in an embodiment of the present application;

[0045] FIG23 is a simulation diagram provided in an embodiment of the present application;

[0046] FIG24 is a schematic diagram of an antenna solution provided in an embodiment of the present application;

[0047] FIG25 is a schematic diagram of an antenna solution provided in an embodiment of the present application;

[0048] FIG26 is a schematic diagram of an S-parameter simulation provided in an embodiment of the present application;

[0049] FIG27 is a schematic diagram of an antenna solution provided in an embodiment of the present application;

[0050] FIG28 is a schematic diagram of an S-parameter simulation provided in an embodiment of the present application;

[0051] FIG29 is a schematic diagram of current simulation provided by an embodiment of the present application;

[0052] FIG30 is a schematic diagram of an antenna solution provided in an embodiment of the present application;

[0053] FIG31 is a schematic diagram of S-parameter simulation provided in an embodiment of the present application. DETAILED DESCRIPTION

[0054] An electronic device can be configured with one or more antennas to transmit and receive wireless signals. The electronic device may include a foldable device with a foldable screen.

[0055] The following first briefly describes the foldable device involved in the embodiments of the present application.

[0056] For example, referring to FIG1 , there are examples of a foldable device in different states. For example, the foldable device is a foldable mobile phone. The inside of the foldable device may be configured with a foldable screen, which may include screen A and screen B as shown in FIG1 . In different implementations, screen A and screen B may be different parts of the same screen, or screen A and screen B may be two independent screens. Correspondingly, the outside of the foldable device may also be configured with a display screen, such as screen C.

[0057] In the example of FIG. 1 , the C screen may be a screen disposed opposite to the A screen.

[0058] As shown in Figure 1, the states of the foldable device may include an unfolded state as shown in (a) in Figure 1, a closed state (or called a folded state) as shown in (c) in Figure 1, and a semi-closed state (or called a semi-folded state) between the unfolded state and the closed state as shown in (b) in Figure 1.

[0059] 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.

[0060] 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.

[0061] Correspondingly, when the foldable device is in a semi-closed state, the folding angle is between 0 degrees and 180 degrees.

[0062] One or more antennas may be configured in the foldable device to support the wireless communication function of the foldable device.

[0063] Taking a foldable device with a metal frame structure as an example, FIG2 shows a structural example of a foldable device.

[0064] As shown in Figure 2, a metal frame can be provided on the side of the foldable device, thereby giving the side of the foldable device 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 ensured.

[0065] In the example shown in Figure 2, one or more through-slits are configured on the metal frame. These through-slits can break the metal frame into multiple relatively independent metal strips. In this way, the metal strips on the metal frame can serve as antenna radiators, enabling the configuration of antennas in foldable devices.

[0066] A metal midframe can also be placed inside the metal frame. As shown in Figure 2, this metal midframe can cover a large area of ​​the foldable device, providing overall rigid support. In some embodiments, the metal midframe can also provide a zero-potential reference for various electrical components in the foldable device based on its large metal area.

[0067] For example, the metal middle frame can be coupled to the antenna radiator to achieve antenna grounding. In another example, the metal middle frame can provide a zero potential reference for the printed circuit board (PCB) configured in the electronic device and the various electronic components and circuits carried on the PCB.

[0068] In the example shown in Figure 2, the electronic device may be configured with a PCB 21. This PCB 21 can be used to carry chips, circuits, electronic components, and the like within the foldable device. For example, a baseband chip, a radio frequency module, and the like may be configured on the PCB 21. This allows the baseband chip and radio frequency module to work together to provide a feed signal to the antenna for outward signal transmission, or to receive wireless signals through the antenna, and the radio frequency module and baseband chip to process and obtain valid information carried in the wireless signals, thereby achieving signal reception.

[0069] It should be noted that the PCB 21 shown in FIG2 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 example shown in FIG2.

[0070] As shown in FIG2 , the foldable device may also be configured with a battery for powering the foldable device. For example, the number of the battery may be one or more. In the example shown in FIG2 , the battery may include battery 22 and battery 23, etc.

[0071] In the following description, a foldable device having the architecture shown in FIG2 is used as an example. It is understood that in other embodiments, the foldable device may also have other architectures. For example, the foldable device may be foldable up and down. In another example, the foldable device may have 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.

[0072] In combination with the above description of Figures 1 and 2, refer to Figure 3, taking the example of setting an antenna on the top of a foldable device. Figure 3 provides an example of the composition logic of an antenna ANT1. 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.

[0073] As shown in Figure 3, one or more slits can be provided in the metal frame at the top of the main screen. For example, in the example shown in Figure 3, antenna ANT1 can be isolated from the rest of the frame by slits 31 and 33. Slit 32 can also be provided in ANT1, allowing the radiator of ANT1 to include two separate radiators. For example, the two radiators can include radiator R1 and radiator R2.

[0074] The end of radiator R1 away from radiator R2 is grounded. The end of radiator R1 close to radiator R2 is connected to the feed source. The end of radiator R2 away from radiator R1 is grounded. In some implementations, a capacitor can be connected in series between radiator R1 and the feed source, so that radiator R1 can operate in left-handed mode for radiation. Correspondingly, radiator R2 can be coupled through gap 32 to obtain the effect of parasitic radiation. In some implementations, the width of gap 32 can be less than or equal to 5 mm. Furthermore, the width of gap 32 can be less than or equal to 2.5 mm.

[0075] When the antenna ANT1 shown in FIG3 is in operation, it can excite the left-hand mode, the common mode (CM) mode, the parasitic mode, and the differential mode (DM) mode, respectively, covering at least two frequency bands. In some implementations, the at least two frequency bands can include a first frequency band and a second frequency band, as well as 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.

[0076] It will be understood that the antenna ANT1 shown in FIG3 is merely 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 2.4GHz or 5GHz Wi-Fi bands in short-range communications, and / or GPS bands, etc. In addition, in other embodiments, the form of the antenna configured in the foldable device may also be different from the antenna ANT1 shown in FIG3. In other embodiments, the position of the antenna configured in the foldable device may also be different from the antenna ANT1 shown in FIG3, for example, it may be configured on the side, bottom, etc. of the foldable device. The embodiments of the present application are not limited to this.

[0077] 1 , the foldable device, when in use, includes at least an unfolded state and a closed state. In the example of FIG3 , in the unfolded state, the environment near the antenna ANT1 is relatively open, thus providing better radiation performance.

[0078] 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.

[0079] As an ideal comparison, in the closed state, the area projected by the antenna ANT1 onto the secondary screen can be configured with non-conductive material, thereby minimizing the impact of the metal material on the secondary screen on the antenna ANT1 in the closed state.

[0080] For example, referring to FIG4 , there is provided diagrams of different viewing angles in a closed state when the ANT1 shown in FIG3 is configured in a foldable device.

[0081] As shown in 401 in FIG. 4 , in the top view, the main screen is provided with an antenna ANT1 , while the corresponding area on the sub-screen does not include a radiator (ie, does not include metal material).

[0082] As shown in 402 in FIG. 4 , in the front view, antenna ANT1 on the main screen can be configured in a clearance area. The clearance area can be an area around the metal middle frame of a foldable device where no (or minimal) metal materials or components are provided. This clearance area allows antennas (such as antenna ANT1) to obtain better radiation space.

[0083] In the foldable device in the closed state with the configuration shown in FIG4 , when the antenna ANT1 is working, the corresponding simulation results are shown in FIG5 and FIG6 .

[0084] It should be noted that in the following examples of this application, all simulation examples are given based on the electronic device being in a closed state, and no further explanation will be given hereafter.

[0085] FIG5 shows an example of S-parameter simulation of the antenna configuration shown in FIG4 , where the length of the radiator R1 is 15 mm and the length of the radiator R2 is also 15 mm.

[0086] As shown in the single-port return loss (S11) curve in Figure 5, the antenna ANT1 can cover at least two operating frequency bands, namely the frequency band near 2.32 GHz and the frequency band near 2.8 GHz, when in operation. As shown in the system efficiency and radiation efficiency curves in Figure 5, when the antenna ANT1 is in operation, the radiation efficiency can reach above -2dB near 2.3 GHz. Correspondingly, under the current port matching state, the system efficiency can exceed -3dB near 2.3 GHz and approach -2dB. At the high frequency near 2.8 GHz, the radiation efficiency can exceed -6dB, and the system efficiency can be close to -6dB. Therefore, under this relatively ideal environment, the antenna ANT1 can provide good radiation performance in two operating frequency bands (such as the frequency band near 2.3 GHz and the frequency band near 2.8 GHz).

[0087] FIG6 shows an example of current simulation of the link at different frequencies for the antenna configuration shown in FIG4 .

[0088] As shown in Figure 6, at 2.15 GHz, the current is primarily distributed on the left radiator (e.g., radiator R1). The current is distributed in the same direction, from the feed source to the ground terminal. This distribution characteristic conforms to the left-handed mode current distribution. In other words, when antenna ANT1 is operating, the left-handed mode distributed on radiator R1 can cover the 2.15 GHz frequency range.

[0089] At 2.32 GHz, the current is primarily distributed on the left and right radiators (e.g., radiator R2). The current is distributed in the same direction on both radiators. This distribution characteristically radiates a CM mode current distribution. In other words, when antenna ANT1 is operating, the CM mode distributed on radiators R1 and R2 can cover 2.32 GHz.

[0090] Corresponding to the S11 curve shown in Figure 5, the left-hand mode and the CM mode can be used together to cover the frequency band around 2.32 GHz. Among them, the CM mode has a greater contribution to radiation, and the left-hand mode can be used to expand the low-frequency bandwidth.

[0091] Continuing with Figure 6, at 2.5 GHz, the current is primarily distributed on the left radiator and the right radiator (e.g., radiator R2). The current flows in the same direction on both radiators. This distribution is characteristic of the CM mode. Compared to the CM mode at 2.32 GHz, the current intensity on radiators R1 and R2 is reduced.

[0092] At 2.65 GHz, the current is mainly distributed on the right radiator (such as radiator R2). When the antenna ANT1 is working, the 1 / 4 wavelength parasitic mode distributed on the radiator R2 covers 2.65 GHz.

[0093] As the frequency increases further, DM mode current distribution appears on the radiator.

[0094] For example, at 2.8 GHz, current is distributed on both radiators R1 and R2. The current on radiator R1 is in opposite directions to the current on radiator R2. This distribution characteristic conforms to the DM mode current distribution. In other words, when antenna ANT1 is operating, the DM mode distributed on radiators R1 and R2 covers the 2.8 GHz frequency band.

[0095] Furthermore, at 2.95 GHz, current is distributed across both radiators R1 and R2. The current on radiator R1 is in opposite directions to the current on radiator R2. This distribution is consistent with the current distribution of the DM mode. Compared to the DM mode covering 2.8 GHz, the current intensity on radiators R1 and R2 is reduced.

[0096] Thus, through the current simulation at multiple frequencies shown in Figure 6, we can draw the following conclusion: In the antenna configuration shown in Figure 4, antenna ANT1 can simultaneously cover low-frequency bands (such as the band around 2.3 GHz) and high-frequency bands (such as the band around 2.8 GHz). The low-frequency band can be covered using the CM mode (or the CM mode and the left-hand mode), and the high-frequency band can be covered using the DM mode.

[0097] The above Figures 4 to 6 provide a detailed description of the ideal working conditions of antenna ANT1 when it is configured in a foldable device and the foldable device is in a closed state. It is understandable that in actual implementation, due to limitations such as the appearance ID, when an antenna (such as antenna ANT1) is configured on the main screen frame, the area projected onto the secondary screen by the antenna in the closed state often includes metal materials such as the secondary screen frame. In this way, compared to the ideal environment configuration shown in Figure 4, the radiation of the antenna (such as antenna ANT1) on the main screen frame will be significantly affected when the foldable device is in a closed state.

[0098] In order to solve the impact of metal materials such as the secondary screen frame on the main screen antenna (such as the main screen frame antenna) in a closed state, an embodiment of the present application provides an antenna solution. Through targeted configuration of the secondary screen frame, the main screen frame antenna can provide radiation performance close to the ideal environment configuration as shown in Figure 4 even in a closed state.

[0099] The antenna solution provided in the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0100] 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, an in-vehicle device, a smart home device, or a smart city device. The embodiment of the present application does not impose any particular restrictions on the specific type of the electronic device 100.

[0101] In some embodiments, the antenna solution provided in the embodiments of the present application can be applied to electronic devices equipped with a folding screen (such as the above-mentioned foldable device).

[0102] As an example, the electronic device may have a structure as shown in Figure 1 or Figure 2. In combination with the description in Figures 1 and 2, in this 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 dielectric, etc.

[0103] In some implementations, the antenna radiating branch can be configured by reusing a metal structure on the electronic device. For example, the antenna radiating branch can be configured by reusing a metal frame. In another example, the antenna radiating branch can be formed by hollowing out a portion of a metal floor structure.

[0104] In other implementations, the antenna radiating branches may also be configured on the electronic device through other means, such as flexible printed circuit (FPC), metal frame diecasting for anodic oxidation (MDA), laser direct structuring (LDS), etc.

[0105] In an embodiment of the present application, as shown in FIG7 , the radiating branch of the antenna (or called a radiator) may include a first radiating part and a second radiating part. The first radiating part may be configured in an area corresponding to the first screen (such as the first part of the electronic device), and the second radiating part 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 are buckled together when the electronic device is in a closed state. For example, the first screen may be screen A as described in FIG1 , and the second screen may be screen B as shown in FIG1 . For 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.

[0106] For example, if the first radiating portion is located in the main screen area (i.e., the first portion of the electronic device), the first radiating portion can also be referred to as the main screen radiator. Correspondingly, if the second radiating portion is located in the secondary screen area, the second radiating portion can also be referred to as the secondary screen radiator.

[0107] 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 can be included in the area where the secondary screen radiator is located. This allows for targeted configuration of the secondary screen radiator, 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 remaining part 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.

[0108] The following examples illustrate the main screen radiator (i.e., the first radiating part) and the secondary screen radiator (i.e., the second radiating part) in the solution provided in the embodiment of the present application.

[0109] 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 shrapnel. For example, the main screen radiator may be coupled to the RF link on the PCB through metal shrapnel at the location of the feeding point. This facilitates feeding 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 through electrical connection components such as metal shrapnel at the location of the grounding point.

[0110] The main screen radiator, feed source, and grounding point can logically constitute the main screen antenna together. In some implementations, the main screen antenna can have the composition of antenna ANT1 as shown in Figure 3. As a possible description, the main screen antenna can be described as: the main screen antenna can include a first radiator (corresponding to radiator R1) and a second radiator (corresponding to radiator R2). One end of the first radiator is separated from one end of the second radiator by a gap (corresponding to 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.

[0111] A feed source is provided on one end of the first radiator close to the second radiator. A grounding point is provided on one end of the first radiator away from the second radiator. The end of the second radiator close to the first radiator is open, and the end of the second radiator away from the first radiator is provided with a grounding point.

[0112] 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 series capacitor 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 for the corresponding mode.

[0113] 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).

[0114] As shown in FIG. 7 , in the embodiment of the present application, a second radiating portion may also be provided on the second screen of the electronic device.

[0115] Exemplarily, referring to FIG8 , 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.

[0116] The first radiating element group may include at least one first radiating element. A grounding point is provided on the first radiating element. The grounding point may be located anywhere on the first radiating element. The first radiating element may include at least one open end. When the secondary screen radiator includes multiple first radiating elements, the lengths of any two first radiating elements may be the same or different.

[0117] In the present application, the length of any first radiation unit is less than 1 / 4 wavelength corresponding to the second frequency band.

[0118] 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 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 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 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 comprehensive calculation based on the electrical parameters of the conductive material used to implement the first radiation unit and the 1 / 4 wavelength length of the center frequency (or endpoint frequency) of the second frequency band. In the following scheme examples, limiting the length of the radiation unit / radiator by wavelength follows this description and will not be repeated.

[0119] 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.

[0120] In the present application, the length of any second radiation unit is less than 1 / 2 wavelength corresponding to the second frequency band.

[0121] 9 , two examples of the composition of an antenna (or terminal antenna) composed of the first radiation portion and the second radiation portion are shown.

[0122] As shown in 91 of Figure 9 , 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, at the top edge of the first screen. In this example, the first radiating portion has the same structural features as the aforementioned antenna ANT1 and is used as a main screen antenna to cover the first and second frequency bands.

[0123] The second radiation portion is located on the second screen. When the electronic device is in a closed state, the projection of the first radiation portion onto the second screen at least partially overlaps with the second radiation portion.

[0124] In the example of 91, the second radiation portion 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.

[0125] As shown in 92 of FIG9 , taking the example of the second radiation portion including one second radiation unit, the one 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.

[0126] It can be understood that when the second radiating portion, as a parasitic branch, obtains energy from the first radiating portion through coupling and radiates, taking the antenna scheme 92 in Figure 9 as an example, for the second radiating element (such as radiator 903) in any second radiating portion, since both ends are open, it can excite the 1 / 2 wavelength mode to operate. Taking the length of the second radiating element (such as radiator 903) as length L1 as an example. Then, when the second radiating element is operating, the corresponding wavelength of the resonant frequency of the fundamental mode generated should correspond to 2*L1. Combined with the above description of the second radiating element, since the length (L1) of the second radiating element (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 element is located higher in the frequency domain than the second frequency band. Therefore, when operating 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 element will not generate a current opposite to that of the first radiating portion. Therefore, within the frequency range lower than the second frequency band, the current generated on the second radiating element has the same direction as the current generated on the first radiating element. 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).

[0127] For similar reasons, when the second radiating part includes the first radiating unit, taking the antenna scheme 91 in Figure 9 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 this 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).

[0128] The following, combined with simulation comparison, illustrates the impact of different radiator lengths in the second radiating portion on the overall radiation of the antenna when the second radiating portion is configured with the first radiating unit or the second radiating unit, thereby supporting the above explanation.

[0129] For example, the second radiating portion includes the first radiating unit.

[0130] Figure 10 provides two antenna solutions, namely antenna solution 101 and antenna solution 102. The main screen antenna settings in the two antenna solutions are the same.

[0131] In antenna solution 101, the configuration of the second radiating portion is the same as that of antenna solution 91. That is, in antenna solution 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.

[0132] In the antenna solution 102, the second radiating portion 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.

[0133] FIG11 shows a simulation comparison of S parameters corresponding to the two antenna schemes shown in FIG10 .

[0134] As shown in S11 in Figure 11, both antenna solution 101 and antenna solution 102 can resonate in a frequency band around 2.3 GHz (corresponding to the first frequency band) and resonate in a frequency band around 2.8 GHz (corresponding to the second frequency band).

[0135] In antenna solution 102, because radiators 1001 and 1002 are longer, both the high-frequency and low-frequency resonances are somewhat low. Notably, a parasitic resonance occurs between the high-frequency and low-frequency resonances due to parasitic effects in the second radiating portion. This parasitic resonance negatively impacts radiation performance within the operating frequency band.

[0136] Referring to the radiation efficiency comparison in Figure 11, antenna solution 102 exhibits a significant efficiency dip near 2.6 GHz, where the parasitic resonance resides. Conversely, antenna solution 101 exhibits no significant in-band radiation efficiency dip, as its first radiating element is smaller than a quarter wavelength in the second frequency band (i.e., the band corresponding to the high-frequency resonance).

[0137] 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 the closed state.

[0138] In some other embodiments, the second radiating portion includes a second radiating unit as an example. In conjunction with the example in the antenna solution 92 of FIG9 , refer to FIG12 .

[0139] Figure 12 provides two antenna solutions, namely antenna solution 121 and antenna solution 122. The main screen antenna settings in the two antenna solutions are the same.

[0140] In antenna solution 121, the configuration of the second radiating portion is the same as that of antenna solution 92. That is, in antenna solution 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.

[0141] In the antenna solution 122, the second radiating portion may include a radiator 1201. The length of the radiation 903 is greater than 1 / 2 wavelength of the second frequency band.

[0142] FIG13 shows a simulation comparison of S parameters corresponding to the two antenna schemes shown in FIG12 .

[0143] As shown in Figure 13, the S11 comparison example. Antenna solution 121 can excite the first frequency band near 2.3 GHz and the second frequency band near 2.8 GHz for operation. Antenna solution 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).

[0144] Figure 13 shows a comparison of radiation efficiency. Antenna solution 122 exhibits a significant efficiency dip 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 exhibits a significant efficiency dip near 2.4 GHz compared to antenna solution 121.

[0145] FIG13 also provides an example of current simulation at various frequencies when the antenna solution 122 is operating.

[0146] As can be seen, at 2.14 GHz, the current directions in the first and second radiating parts are the same, both operating in the CM mode. At 2.4 GHz, significant reverse currents appear in the parasitic radiators (such as radiator R2) in the first radiating part and in the second part. This is one of the reasons why antenna solution 122 exhibits a dip in efficiency around 2.4 GHz. At 2.57 GHz, reverse currents appear in the first and second radiating parts, resulting in an abnormal decrease in the radiation performance of antenna solution 122 in this 2.57 GHz frequency band. At 2.79 GHz, reverse currents appear in the first and second radiating parts, both operating in the DM mode. The overall current distribution in the first radiating part corresponds to the overall current distribution in the second radiating part (i.e., the current directions in the two corresponding areas before and after the projection of the first part onto the second part are the same). Therefore, the radiation from the second radiating part does not negatively impact the radiation differential of the first radiating part. Therefore, at 2.79 GHz, antenna solution 122 can provide similarly good radiation performance as antenna solution 122.

[0147] Based on the comparative examples shown in Figures 12 and 13 , in this application, the second radiating element is specifically configured to be smaller than half the wavelength of the second frequency band. This effectively prevents the second radiating element from affecting the normal operation of the first radiating element when it is in a closed state and close to the first radiating element. For example, the radiation effect shown in antenna solution 121 is obtained.

[0148] The above descriptions of FIG. 10 to FIG. 13 briefly illustrate the configuration mechanism of the first radiating unit and the second radiating unit in the second radiating part in the solution example shown in FIG. 9 .

[0149] 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 portion. In the case where the second radiation portion includes multiple units, the multiple units can be separated by gaps.

[0150] For example, taking the second radiating portion including the second radiating unit as an example, FIG14 shows a schematic diagram of the components of two antenna solutions. In the example shown in FIG14 , antenna solution 141 and antenna solution 142 may be included.

[0151] Among them, the antenna composition of antenna solution 141 can correspond to the example of antenna solution 92 in the aforementioned Figure 9.

[0152] In antenna solution 142, the second radiating portion may include two second radiating elements. For example, radiator 1401 and radiator 1402. The lengths of radiators 1401 and 1402 are both less than half the wavelength of the second frequency band. As shown in Figure 14, the long sides of radiators 1401 and 1402 may be aligned, with the two radiators separated by a gap.

[0153] Figure 15 provides a simulation comparison of antenna solution 141 and the ideal parasitic-free solution shown in Figure 4, while Figure 16 provides a simulation comparison of antenna solution 142 and the parasitic-free solution. It can be seen that in both implementations of Figure 14, when the second radiating portion includes one or more second radiating elements, the antenna can achieve radiation performance that is substantially the same as or similar to that of the parasitic-free solution.

[0154] The following explains them separately.

[0155] 15 , there is provided an S-parameter simulation comparison of the antenna solution 141 and the parasitic-free solution, as well as an example of current simulation.

[0156] As shown in S11 in Figure 15, the addition of a second radiating element to antenna solution 141 significantly improves both resonance depths and optimizes bandwidth. From the perspective of radiation efficiency, antenna solution 141 with the second radiating element achieves radiation efficiency comparable to that of a parasitic-free solution across the entire frequency band. From a system efficiency perspective, the peak efficiency and efficiency bandwidth of antenna solution 141 are essentially the same as those of a parasitic-free solution.

[0157] 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).

[0158] FIG15 also provides a current simulation example corresponding to each frequency point when the antenna solution 141 is working.

[0159] At 2.24 GHz, the two radiations of the first radiating section directly carry currents in the same direction, representing the CM mode. Furthermore, the current in the second radiating section follows the same direction as the first radiating section. Therefore, at this 2.24 GHz, the configuration of the second radiating section does not negatively impact the normal radiation of the first radiating section.

[0160] At 2.77 GHz, the two radiations of the first radiating section directly distribute currents in opposite directions, indicating a DM mode. The direction of the local current in the second radiating section is the same as the current direction at the corresponding location on the first radiating section (e.g., both are from right to left). There is no significant current distribution in the remaining portion of the second radiating section. Therefore, at this 2.77 GHz, the configuration of the second radiating section does not negatively impact the normal radiation of the first radiating section.

[0161] 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 2.9GHz is already higher than the second frequency band (such as around 2.8GHz), the parasitic mode corresponding to the current at 2.9GHz appears outside the operating 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.

[0162] In addition, as shown in FIG15 , at a higher frequency of 2.95 GHz, the second radiation portion can also stimulate an obvious 1 / 2 wavelength mode to operate.

[0163] Based on the simulations of antenna solution 141, it can be seen that within the operating frequency band (e.g., the frequency band covered by the CM and DM modes), the currents in the first and second radiating portions are both corresponding currents in the same direction. Therefore, in terms of S parameters, antenna solution 141 can be shown to have good radiation performance.

[0164] 16 , which shows a simulation comparison example of antenna solution 142 and a parasitic-free solution, compared to antenna solution 141 , the second radiating portion of antenna solution 142 may include two second radiating elements.

[0165] As shown in S11 in Figure 16, antenna solution 142 achieves a significant improvement in both resonance depths and bandwidth. From the perspective of radiation efficiency, antenna solution 142, with the addition of a second radiating element, achieves radiation efficiency across the entire frequency band comparable to that of a solution without parasitic elements. From the perspective of system efficiency, antenna solution 142 achieves peak efficiency and bandwidth that are essentially the same as those of a solution without parasitic elements.

[0166] 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).

[0167] FIG16 also provides a current simulation example corresponding to each frequency point when the antenna solution 142 is working.

[0168] At 2.2 GHz, the two radiations of the first radiating part directly distribute current in the same direction, which is the CM mode. In addition, there is no significant current distribution on the second radiating part, which will not affect the radiation of the first radiating part at this frequency.

[0169] At 2.3 GHz, the two radiation elements of the first radiating section directly distribute current in the same direction, indicating CM mode. The two secondary radiating elements of the second radiating section also distribute current in the same direction as the first radiating section. Therefore, at this 2.3 GHz, the configuration of the second radiating section does not negatively impact the normal radiation of the first radiating section.

[0170] 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.

[0171] At 2.7 GHz, the two radiations of the first radiation part directly distribute opposite 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.

[0172] At 2.7 GHz, the two radiation elements of the first radiating section directly distribute currents in opposite directions, indicating a DM mode. The two secondary radiating elements of the second radiating section also distribute currents in the same DM mode as the first radiating section. Therefore, at 2.3 GHz, the configuration of the second radiating section does not negatively impact the normal radiation of the first radiating section.

[0173] Based on the simulations for antenna solution 142, we can see that, similar to antenna solution 141 in Figure 15 , when antenna solution 142 operates, the currents in the first radiating portion and the second radiating portion are both corresponding, unidirectional currents within the operating frequency band (e.g., the frequency band covered by the CM and DM modes). Therefore, in terms of S parameters, antenna solution 141 exhibits good radiation performance.

[0174] In combination with the descriptions of Figures 14 to 16 above, when the second radiating part includes second radiating units, the number of second radiating units and the specific size difference of each second radiating unit (as long as it is less than 1 / 2 wavelength of the second frequency band) will not have a significant impact on the actual operation of the antenna.

[0175] In other embodiments, the second radiation part may further include more second radiation units.

[0176] For example, refer to Figure 17. In the antenna solution 171 provided in Figure 17, the second radiating portion may include four second radiating elements separated by three slots. The length of each second radiating element is less than 1 / 2 wavelength of the second frequency band.

[0177] As shown in the antenna solution 172 provided in Figure 17 , the second radiating portion may include eight second radiating elements separated by seven slots, and the length of each second radiating element is less than 1 / 2 wavelength of the second frequency band.

[0178] Figure 18 provides a comparative example of S11 for the two antenna solutions shown in Figure 17. Figure 18 also shows S11 for antenna solution 92 shown in Figure 9 in the aforementioned example for comparison. As can be seen, when the second radiating portion includes 1, 4, or 7 second radiating elements, S11 is essentially the same, and the radiation effects of these three antenna solutions are essentially the same. In other words, the number of second radiating elements does not directly affect the overall radiation effect of the antenna.

[0179] In the aforementioned examples, the boundaries of the second radiating element or the first radiating element in the second radiating portion do not extend beyond the first radiating portion. For example, in any of the aforementioned antenna solutions provided in this application, when the electronic device is in a closed state, the projection of the first radiating portion onto the secondary screen is substantially the same size as the area where the second radiating portion is located.

[0180] In some other embodiments of the present application, the second radiation portion may also be configured to have a projection area larger than the first radiation portion.

[0181] Exemplarily, referring to FIG. 19 , in the antenna scheme 191 , the second radiation portion may include a plurality of second radiation units, and the projection area of ​​the second radiation portion exceeds that of the first radiation portion.

[0182] Refer to FIG20 , which shows an example of S-parameters and current simulation corresponding to the antenna solution 191 .

[0183] As shown in S11 in Figure 20, antenna solution 191 basically overlaps with S11 of antenna solution 92. That is to say, the second radiating part is set beyond the first radiating part, and the effect is basically the same as the second radiating part is set corresponding to the first radiating part. As shown in the current simulation of Figure 20, when antenna solution 191 is working, it can work in CM mode at 2.3GHz and DM mode at 2.8GHz. At 2.3GHz and 2.8GHz, there is basically no significant current distribution on the branches of the second radiating part that exceed the first radiating part. Therefore, even if the second radiating part is set beyond the projection area of ​​the first radiating part, it will not have a negative impact on the normal radiation of the first radiating part.

[0184] It is understood that Figures 14 to 20 above illustrate various variations of the second radiating portion including the second radiating unit. Based on similar principles, the second portion including the first radiating unit can also be modified to achieve similar radiation effects.

[0185] 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.

[0186] For example, refer to FIG21 . The antenna solution provided in FIG21 may be referred to as antenna solution 211 .

[0187] In antenna solution 211, the first radiating portion is still configured in the area corresponding to the first screen. The second radiating portion is configured in the area corresponding to the second screen. When the electronic device is closed, the second radiating portion is included in the area projected by the first radiating portion onto the second screen.

[0188] In the example of FIG21 , the second radiation portion may include three first radiation units and three second radiation units, wherein the first radiation units and the second radiation units may be alternately arranged in sequence.

[0189] It is understandable that, since the length of the first radiating element is less than 1 / 4 wavelength of the second frequency band, and the length of the second radiating element is less than 1 / 2 wavelength of the second frequency band, when the antenna solution 211 shown in FIG21 is in operation, the configuration of the second radiating portion will not negatively affect the normal radiation of the first radiating portion.

[0190] In some other embodiments of the present application, the configuration of the first radiation unit and the second radiation unit in the second radiation portion may also be different from the example of the antenna scheme 211.

[0191] Exemplarily, referring to FIG. 22 , an example of yet another antenna scheme 221 is provided.

[0192] As shown in FIG. 22 , in this example, the second radiation portion may include first radiation units disposed at both ends, and three second radiation units disposed between the two first radiation units.

[0193] FIG23 provides a simulation example of this antenna scheme 221.

[0194] Figure 23 shows the S-parameter simulation results. From the perspective of S11, the S11 of antenna solution 211 is essentially the same as that of a solution without parasitics. From the perspective of radiation efficiency, the radiation efficiency of antenna solution 211 is essentially the same as that of a solution without parasitics. From the perspective of system efficiency, the system efficiency of antenna solution 211 is essentially the same as that of a solution without parasitics.

[0195] 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.

[0196] FIG23 also provides the current distribution at each frequency point when the antenna solution 221 is operating.

[0197] At 2.2 GHz, the first radiating portion operates in CM mode, and there is no significant current distribution in the second radiating portion.

[0198] At 2.32 GHz, the first radiating portion operates in CM mode, and a current in the same direction as that of the first radiating portion is distributed on the second radiating portion.

[0199] At 2.6 GHz, the parasitic stub on the first radiating portion radiates through a parasitic mode (also called a main screen parasitic mode), and there is no significant current distribution on the second radiating portion.

[0200] At 2.8 GHz, the first radiation portion operates in DM mode, and a current in the same direction as that of the first radiation portion is distributed on the second radiation portion.

[0201] It can be seen that within the operating frequency band of 2.2 GHz to 2.8 GHz, the second radiating portion either has no significant current distribution or has current distribution in the same direction as the first radiating portion. Therefore, in antenna solution 221, even if the second radiating portion includes both the first radiating element and the second radiating element, it can avoid the situation where the second radiating portion is close to the first radiating portion and affects the normal operation of the first radiating portion.

[0202] In conjunction with the above description of various examples of the second radiating portion including both the first radiating unit and the second radiating unit, in different implementations of the embodiments of the present application, there is no limitation on the number of first radiating units, the number of second radiating units, and the relative positions of the first radiating units and the second radiating units in the second radiating portion.

[0203] As an example, refer to Figure 24. In antenna solution 241 shown in Figure 24, the second radiating portion may include one first radiating element and three second radiating elements. The first radiating element may be positioned within the second radiating portion, corresponding to the projection of the ground point on the first radiating portion. The second radiating elements are sequentially distributed on the same side of the first radiating element. The second radiating portion is included in the projection area of ​​the first radiating portion onto the second screen.

[0204] It can be understood that, in the antenna scheme 241 provided in Figure 24, 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 18.75 mm, and the length of the parasitic branch in the first radiation part is configured to be 18 mm. In the second radiation part, the length of the first radiation unit is configured to be 3 mm, and the three second radiation units are configured to be 8 mm, 11 mm and 7 mm 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 the parasitic-free scheme can be obtained.

[0205] Figures 8 to 24 above illustrate the working conditions of the antenna under various compositions of the second radiating part in the embodiment of the present application. It will be understood that this solution is not limited to the first radiating part having the composition of ANT1 as shown in Figure 3. 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 the 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 (i.e., 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.

[0206] As a comparison, FIG25 provides another implementation scheme of setting metal branches on the secondary screen. The antenna scheme provided in FIG25 can be referred to as antenna scheme 251.

[0207] As shown in Figure 25, unlike the technical solution of setting the second radiating part on the second screen (i.e., the secondary screen) in this 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).

[0208] The technology of grounding the metal branches near the antenna is commonly used in the treatment of metal materials in the space near the antenna to prevent the metal branches from coupling the energy radiated by the antenna and having a negative impact on the normal radiation of the antenna.

[0209] FIG26 provides a simulation example of the scheme shown in FIG25 .

[0210] As shown in Figure 26, from the perspective of S11, the low-frequency resonance of antenna solution 251 shifts to high frequency compared to the solution without sub-screen branches (i.e., the above-mentioned parasitic-free solution). 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 by the following: 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 deteriorating the radiation performance.

[0211] In some implementations, based on antenna scheme 251, tuning components such as inductors, capacitors and / or resistors can 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 working frequency band.

[0212] For example, referring to antenna solution 271 provided in Figure 27 , tuning components are placed on the two radiators in the secondary screen branch, at their adjacent ends, before being grounded. This tuning component optimizes the radiation performance of the electronic device when closed.

[0213] FIG28 provides an example of an S-parameter simulation of the antenna shown in FIG27 while in operation.

[0214] As shown in Figure 28, adjustments to the tuning components allow the S11 to cover the 2.2GHz to 2.3GHz and near-2.8GHz bands. A parasitic resonance also appears near 2.45GHz on the S11. From a radiation efficiency and system efficiency perspective, significant efficiency gaps exist between the parasitic resonance and low-frequency resonance, and between the parasitic resonance and high-frequency resonance.

[0215] FIG29 provides an example of current simulation at various frequencies when the antenna solution shown in FIG27 is operating.

[0216] At 2.26 GHz, both the secondary and primary antenna branches radiate in CM mode. The current flows in the same direction on the secondary and primary antenna branches. At this point, the secondary antenna branch has no significant effect on the radiation of the primary antenna.

[0217] At 2.42GHz, both the secondary and primary antenna branches radiate in CM mode. The currents in the secondary and primary antenna branches flow in opposite directions. At this point, the secondary antenna branches significantly affect the radiation of the primary antenna.

[0218] At 2.6 GHz, the current is mainly distributed on the parasitic branches of the main screen branches for radiation.

[0219] At 2.78 GHz, both the secondary and primary antenna branches radiate via the DM mode. The current flows in the same direction on the secondary and primary antenna branches. At this point, the secondary antenna branch has no significant effect on the radiation of the primary antenna.

[0220] At 2.87 GHz, the current is mainly distributed on the main screen branches and radiates through the DM mode.

[0221] 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.

[0222] To more clearly illustrate the beneficial effects of the antenna solutions provided in the embodiments of this application, the following compares the implementation effects of the various antenna solutions provided in the aforementioned embodiments. It is clear that the antenna solutions provided in the embodiments of this application can achieve radiation performance similar to that of a parasitic-free solution by providing metal material (such as the second radiating portion) in the corresponding area of ​​the secondary screen (second screen).

[0223] Referring to FIG30 , several different antenna solutions are implemented when the area on the secondary screen corresponding to the main screen antenna is configured with metal material (such as a metal frame).

[0224] 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 radiating portion may include two second radiating units.

[0225] The parasitic-free solution involves configuring the antenna radiator only on the primary screen, leaving the corresponding area on the secondary screen clear. This achieves the best radiation performance. The performance of other antenna solutions should be as close as possible to this parasitic-free solution.

[0226] Antenna solution 251 is also known as a parasitic grounding solution. Referring to the description in FIG25 , the secondary screen branch in this solution may include two grounded branches. This grounding process prevents the secondary screen branch from affecting the primary screen antenna.

[0227] Antenna solution 271 is also known as a dual parasitic tuning solution. Based on antenna solution 251, it adds a tuning component to tune the parasitic resonance generated by the secondary screen branches to between the first and second frequency bands, thus preventing the parasitic resonance from affecting the normal radiation of the first and second frequency bands.

[0228] FIG30 also provides an example of a single parasitic tuning solution. This solution, based on antenna solution 271, reduces the configuration of one tuning component and reduces the cost of implementing the antenna solution.

[0229] FIG31 provides a comparison of the efficiency simulations of the various antenna schemes shown in FIG30 .

[0230] As shown in Figure 31, in terms of radiation efficiency, in both the single parasitic tuning scheme and the dual parasitic tuning scheme, although the parasitic resonance is tuned between the first and second frequency bands, the radiation efficiency in the first frequency band is improved. However, the radiation efficiency in the second frequency band is significantly deteriorated compared to the parasitic-free scheme. The parasitic grounding scheme shows significant deterioration compared to the parasitic-free scheme in both the first and second frequency bands. However, the suspended parasitic scheme, one of the solutions provided in the embodiments of the present application, can achieve the closest effect in radiation efficiency to the parasitic-free scheme in the first and second frequency bands.

[0231] 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 solution implementations.

[0232] It is understandable that, in combination with the aforementioned description of the variations of the various antenna solutions provided in the embodiments of the present application, the various antenna solutions provided in the embodiments of the present application that conform to the above-mentioned second radiating portion configuration can achieve radiation effects similar to those of the suspended parasitic solution. Compared to other solutions (such as parasitic grounding, etc.), it can provide better radiation performance. At the same time, no additional tuning components are required, thereby saving the corresponding hardware overhead and the overhead of the layout area on the PCB.

[0233] It should be understood that although the present application has been described with reference to 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 illustrative 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 changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, the present application is intended to include such changes and modifications if they fall within the scope of the claims of the present application and their equivalents.

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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