Terminal antenna and electronic equipment

Abstract

The embodiment of the invention discloses a terminal antenna and electronic equipment, and relates to the technical field of antennas, and the antenna has better free space and hand model performance. Even if the antenna is arranged on the side edge of the electronic equipment, the antenna can also support the electronic equipment to carry out wireless communication with better quality in various scenes. According to the specific scheme, the terminal antenna is applied to the electronic equipment, the electronic equipment is provided with a metal frame, and the metal frame is provided with a first gap and a second gap. The metal frame between the first gap and the second gap forms a first radiator, and the first radiator is not connected with the metal frame outside the first gap and the second gap. The antenna comprises a first radiator. The first radiator is sequentially provided with a first electric connection point, a second electric connection point and a third electric connection point. The first electric connection point is coupled with the feed source through the first tuning part, the second electric connection point is coupled with the reference ground, and the third electric connection point is coupled with the reference ground through the second tuning part.

Description

Terminal antenna and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on November 4, 2022, with application number 202211380028.3 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] Electronic devices can implement wireless communication functions through antennas provided therein, and some antennas can be provided on the sides of the electronic devices for radiation.

[0004] Since electronic devices are used in scenarios such as free space and hand-held, in these scenarios, antennas installed on the side need to provide good radiation performance to support the wireless communication quality of the electronic devices.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a terminal antenna and electronic device, wherein the antenna has better free space and hand model performance. Even if it is set on the side of the electronic device, the antenna can support the electronic device to perform good quality wireless communication in various scenarios.

[0007] In order to achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0008] In a first aspect, a terminal antenna is provided, which is applied to an electronic device. The electronic device is provided with a metal frame, and a first slit and a second slit are provided on the metal frame. The metal frame between the first slit and the second slit constitutes a first radiator, and the first radiator is not connected to the metal frame outside the first slit and the second slit. The antenna includes: the first radiator. A first electrical connection point, a second electrical connection point, and a third electrical connection point are sequentially provided on the first radiator. The first electrical connection point is coupled to a feed source through a first tuning component, the second electrical connection point is coupled to a reference ground, and the third electrical connection point is coupled to a reference ground through a second tuning component.

[0009] Therefore, by sequentially arranging the feed source and the grounding point on the metal frame antenna, the excitation of the CM mode and the DM mode can be achieved simultaneously, thereby providing good radiation performance in both free space and hand modes.

[0010] Optionally, the first tuning component includes a first capacitor. In this way, by connecting the capacitor in series on the feed link, the effect of exciting the left-hand mode can be achieved.

[0011] Optionally, the second tuning component includes at least one of the following: a capacitor and an inductor.

[0012] Optionally, the second tuning component includes at least one second capacitor, and the capacitance of the second capacitor is determined according to the operating frequency band. When the operating frequency band of the antenna covers low frequencies, the capacitance of the second capacitor is within the range of 0 to 8 pF. When the operating frequency band of the antenna covers medium and high frequencies, the capacitance of the second capacitor is within the range of 0 to 5 pF.

[0013] Optionally, the second tuning component includes at least one first inductor, wherein the inductance of the first inductor is determined according to the operating frequency band. When the antenna's operating frequency band covers low frequencies, the inductance of the first inductor is within a range of 10 nH to 82 nH. When the antenna's operating frequency band covers mid- to high frequencies, the inductance of the first inductor is within a range of 5 nH to 27 nH.

[0014] This solution provides several examples of how to configure the second tuning component. For example, the second tuning component can be configured as a capacitor, inductor, or other component depending on the operating frequency band. This stimulates the DM mode, which in turn effectively stimulates the longitudinal eigenmode of the floor, thereby achieving better radiation performance.

[0015] Optionally, the second tuning component includes at least two paths, and when the antenna is working, at least one of the at least two paths is turned on by a switch. Each of the at least two paths is provided with a second capacitor or a first inductor. Thus, by setting the switch, the setting of multiple capacitors or inductors can be achieved. In this way, in different scenarios or operating frequency bands, the corresponding path is switched to, the corresponding second capacitor or first point inductor is connected, and the corresponding DM mode coverage of the free space is obtained.

[0016] Optionally, the antenna further includes a third tuning component, one end of which is connected to the first electrical connection point or near the first electrical connection point, and the other end of which is connected to a reference ground. The third tuning component includes at least two third capacitors, each corresponding to a path, and the capacitance of the third capacitors on different paths being different. When the antenna is in operation, at least one of the paths corresponding to the at least two third capacitors is selected to be conductive via a switch.

[0017] This example provides an implementation for switching paths using a switch component on a feeder link. For example, the third tuning component can be connected in parallel to the first electrical connection point. In another example, the third tuning component can be connected in parallel to a radiator near the first electrical connection point. By switching different paths of the third tuning component, capacitors of different capacitance values ​​can be connected to the feeder link or to a radiator near the feeder link. This allows switching of the CM mode coverage frequency band.

[0018] Optionally, the first radiator is equally divided into a first portion, a second portion, and a third portion, the second portion is located between the first portion and the third portion, the first electrical connection point is set at any position on the first portion, the second electrical connection point is set at any position on the second portion, and the third electrical connection point is set at any position on the third portion.

[0019] Optionally, the first electrical connection point is arranged on the first part away from the end of the second part, and the third electrical connection point is arranged on the third part away from the end of the second part.

[0020] Optionally, during operation, the antenna excites a first resonance and a second resonance, where the frequency of the first resonance is lower than the second resonance. The first resonance is excited via common-mode (CM) excitation, while the second resonance is excited via differential-mode (DM) excitation. Based on this solution, the DM mode is primarily used to cover the free-space operating frequency band, while the CM mode can be excited in the low-frequency direction of the DM mode. Consequently, in hand-model scenarios, even if the resonance shifts toward higher frequencies due to hand gripping, the CM mode remains within the operating frequency band, providing improved hand-model radiation performance.

[0021] Optionally, when the capacitance value of the third capacitor in the third tuning component of the antenna is switched to a smaller value, the first resonance shifts toward a higher frequency. Optionally, when the capacitance value of the second capacitor in the second tuning component is switched to a smaller value, the second resonance shifts toward a higher frequency. This provides a specific implementation for adjusting the DM mode and the CM mode. In different implementation scenarios of this solution, the third capacitor and the second capacitor can be flexibly set as needed to obtain better radiation in the current scenario.

[0022] Optionally, the terminal antenna is arranged on a long side of the electronic device.

[0023] Optionally, the length of the first radiator is greater than 1 / 4 wavelength of the working frequency band and less than 1 / 2 wavelength of the working frequency band.

[0024] In 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 design thereof. When the electronic device transmits or receives a signal, the signal is transmitted or received via the terminal antenna.

[0025] It should be understood that the technical solutions provided in the above-mentioned second aspect and their technical features can correspond to the technical solutions 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

[0026] FIG1 is a schematic diagram of the location of an antenna in a mobile phone;

[0027] FIG2 is a schematic diagram of a left-hand antenna disposed on the side;

[0028] FIG3 is a schematic diagram of a left-hand antenna disposed on the side;

[0029] FIG4 is a schematic diagram of a current loop antenna disposed on a side;

[0030] FIG5 is a schematic diagram of a hand model scene;

[0031] FIG6 is a schematic diagram of an S-parameter simulation when the side antenna is a left-handed solution;

[0032] FIG7 is a schematic diagram of an S-parameter simulation when the side antenna is a current loop solution;

[0033] FIG8 is a schematic diagram of finger caulking in a hand model;

[0034] FIG9 is a schematic diagram of a simulation of finger sealing in a left-handed antenna solution;

[0035] FIG10 is a schematic diagram of a simulation of finger sealing in a current loop antenna solution;

[0036] FIG11 is a logic diagram of an antenna solution provided in an embodiment of the present application;

[0037] FIG12 is a logic diagram of an antenna solution provided in an embodiment of the present application;

[0038] FIG13 is a logic diagram of an antenna solution provided in an embodiment of the present application;

[0039] FIG14 is a logic diagram of an antenna solution provided in an embodiment of the present application;

[0040] FIG15A is a logic diagram of an antenna solution provided in an embodiment of the present application;

[0041] FIG15B is a logic diagram of an antenna solution provided in an embodiment of the present application;

[0042] FIG16 is a schematic diagram of an S-parameter simulation of an antenna solution provided in an embodiment of the present application;

[0043] FIG17 is a schematic diagram of current simulation of an antenna solution provided in an embodiment of the present application;

[0044] FIG18 is a schematic diagram of current simulation of an antenna solution provided in an embodiment of the present application;

[0045] FIG19 is a schematic diagram of an electric field simulation of an antenna solution provided in an embodiment of the present application;

[0046] FIG20 is a schematic diagram of an electric field simulation of an antenna solution provided in an embodiment of the present application;

[0047] FIG21 is a schematic diagram of an S-parameter simulation of an antenna solution provided in an embodiment of the present application;

[0048] FIG22 is a schematic diagram of an S-parameter simulation of an antenna solution provided in an embodiment of the present application;

[0049] FIG23 is a logic diagram of an antenna solution provided in an embodiment of the present application;

[0050] FIG24 is a logic diagram of an antenna solution provided in an embodiment of the present application;

[0051] FIG25 is a logic diagram of an antenna solution provided in an embodiment of the present application;

[0052] FIG26 is a schematic diagram of an S-parameter simulation of an antenna solution provided in an embodiment of the present application. DETAILED DESCRIPTION

[0053] Electronic devices can be equipped with antennas to implement wireless communication. Referring to Figure 1 , taking a mobile phone as an example, conventional antennas can be installed on the top and / or bottom of the electronic device. Corresponding to Figure 1 , the top antenna can be installed in the upper antenna area shown in Figure 1 . Correspondingly, the bottom antenna can be installed in the lower antenna area shown in Figure 1 .

[0054] As electronic devices develop, screen-to-body ratios are increasing, and the number of antennas is increasing. As a result, the space in the upper and lower antenna areas often cannot meet the requirements for antenna placement. Therefore, in some implementations, antennas can be placed on the side of the electronic device (such as the mobile phone shown in Figure 1).

[0055] In the example shown in Figure 1, a mobile phone with a metal frame structure is used as an example. Then the antenna set on the side can reuse the metal frame as a radiator, thereby saving the cost of setting up an additional antenna radiator in a small space. As shown in Figure 1, based on the required length of the antenna radiator (such as the length of the radiator 11), a gap running through the inside and outside of the metal frame is reasonably set, thereby obtaining an independent metal frame as the radiator 11. As shown in the example of Figure 1, a schematic diagram of the electrical connection of an antenna set on the side (referred to as a side antenna for short) is also provided.

[0056] In this example, the antenna radiator can be radiator 11. One end of radiator 11 can be coupled to a feed source (i.e., directly or indirectly), and the other end of radiator 11 can be coupled to ground. The antenna architecture shown in Figure 1 can be used to cover low frequencies (e.g., 700MHz-960MHz), medium frequencies (e.g., 1710MHz-2170MHz), high frequencies (e.g., 2300MHz-2700MHz), and at least part of other wireless communication frequency bands. In the following examples, the side antenna is used to cover low frequencies.

[0057] As a possible implementation, FIG2 shows a specific antenna solution implementation with the antenna architecture shown in FIG1. ​​In this example, the side antenna can achieve at least one frequency band coverage in the low frequency (such as B28, B5 and / or B8) through the left-hand antenna.

[0058] In the solution shown in Figure 2, a gap 22 can be provided on the metal frame that runs through the inside and outside. The metal frame can be coupled to the feed source on one side of the gap 22. For example, one end of the metal frame can be coupled to the feed source via a capacitor 21. The portion of the metal frame away from the gap 22 can be grounded. The length of the metal frame between the grounding point and the gap 22 can be determined based on the operating frequency band to be covered.

[0059] In this example, capacitor 21 can also be called a left-hand capacitor. Based on the setting of the left-hand capacitor, it is possible to stimulate the formation of a current in the same direction on the radiator 11 (i.e., the metal frame between the gap 22 and the ground terminal). This stimulates the left-hand mode to radiate. The left-hand mode can achieve a radiation effect based on a smaller radiator, covering the low-frequency band. It can be understood that the antenna scheme based on the left-hand mode can also be called a left-hand antenna (The composite left hand antenna, CRLH), and the specific implementation method can also be referred to CN201380008276.8 and CN201410109571.9, which will not be repeated here.

[0060] In the implementation of the left-handed antenna shown in FIG2 , the ground terminal may not have a slot extending therethrough. In other left-handed antenna implementations, as shown in FIG3 , a slot 23 extending therethrough may also be provided near the ground terminal of the left-handed antenna. The corresponding radiator 11 of the left-handed antenna may be a metal frame between slots 22 and 23.

[0061] The above-mentioned FIG2 and FIG3 show the specific implementation of using the left-hand antenna as the side antenna. In other implementations, other antenna types can also be used to implement the configuration of the side antenna.

[0062] For example, in conjunction with Figure 4, a schematic diagram of another side antenna configuration is shown. In this example, the side antenna can be implemented using a current loop antenna. For the specific configuration of the current loop antenna, reference can be made to CN202110961752.4, CN202110962491.8, CN202110963510.9, 202110961755.8, and other current loop antenna-related patents.

[0063] As an example, as shown in FIG4 , in this example, the antenna radiator 11 may include a slit 22 running through the frame inside and outside and a metal frame between the slits 23. The end of the metal frame close to the slit 22 may be connected to the feed source. The end of the metal frame close to the slit 23 may be grounded through a capacitor 31. In other implementations, the capacitor 31 may also be set in series at other locations on the radiator 11. In this example, based on the setting of the capacitor 31 between the feed source and the ground, a magnetic field distribution with a small amplitude difference may be distributed between the radiator 11 and the reference ground, thereby obtaining better free-space radiation performance.

[0064] It is understood that electronic devices are used in a variety of scenarios during actual use. For example, the free-space scenario shown in Figures 1-4 is described. In this free-space scenario, there is little or no medium in the space near the electronic device that could affect the antenna radiator, resulting in better antenna radiation performance.

[0065] For example, as shown in Figure 5, in a hand model scenario where a user holds an electronic device, the electronic device (i.e., the antenna) is close to the human hand. However, the human hand has a certain dielectric loss for electromagnetic radiation, so compared to free space, the radiation performance of the antenna is generally affected to varying degrees. In particular, when the user holds the electronic device in the left hand and the right hand, the relative position of the human hand (i.e., the hand model) to the antenna is different, so the working state of the antenna in the left and right hand models may be different.

[0066] As an example, Figure 6 shows S-parameter simulations of the left-handed antenna shown in Figure 2 in free space and in both left-handed and right-handed modes. This example uses the left-handed antenna shown in Figure 2 operating in the B8 frequency band (i.e., 880 MHz to 960 MHz). For ease of illustration, the efficiency simulation shown in Figure 6 only shows the efficiency of the low-frequency portion (i.e., 700 MHz to 1 GHz).

[0067] As shown in the return loss (S11) in Figure 6, the left-hand antenna's free-space optimum is -6dB around 900MHz. There is no significant frequency deviation between the left-hand mode and the right-hand mode compared to free space. Corresponding to system efficiency, it can be seen that the system efficiency of the left-hand antenna in free space, left-hand mode, and right-hand mode is relatively similar, with the system efficiency at 900MHz ranging from -6dB to -8dB. In other words, the drop in the left-hand mode of the left-hand antenna compared to free space is very small. This is also the advantage of the left-hand antenna as a side antenna. However, when the left-hand antenna is placed on the side, the system efficiency and bandwidth in free space are both low.

[0068] In other examples, Figure 7 shows an S-parameter simulation of the current loop antenna shown in Figure 4, in conjunction with the structural diagram of Figure 4. This example also uses the current loop antenna operating in the B8 frequency band as an example. Similar to the diagram in Figure 6, for ease of illustration, the efficiency simulation in Figure 7 only shows the efficiency of the low-frequency portion (i.e., 700 MHz to 1 GHz).

[0069] As shown in S11 in Figure 7, the free-space optimum of the current loop antenna is close to -12dB near 900MHz. In contrast, the left-hand mode has a more obvious tendency to shift to low frequencies. The right-hand mode does not cause significant frequency deviation. Corresponding to the system efficiency, the free-space efficiency peak of the current loop antenna has exceeded -4dB, which is significantly better than the free-space efficiency of the left-hand antenna shown in Figure 6. It also has a better bandwidth. However, as shown in the system efficiency simulation of the left-hand mode and the right-hand mode in Figure 7, the antenna system efficiency is significantly reduced in the hand mode scenario. For example, the peak efficiency of the left-hand mode is less than -8dB, and the peak efficiency of the right-hand mode is less than -10dB. In other words, when used as a side antenna, the current loop antenna has good free-space performance, but the radiation performance in the hand mode scenario is poor.

[0070] In conjunction with the descriptions in Figures 2-4, a gap can be provided between the antenna radiator and the rest of the metal frame. In the examples in Figures 6 and 7 above, the handprint does not cover the gap. In other scenarios, if the handprint covers the gap, the impact of the corresponding handprint will be further increased.

[0071] For example, referring to FIG8 , a finger in the hand model covers the gap 23 near the ground end.

[0072] In some embodiments, referring to Figure 9, a simulation of system efficiency corresponding to a finger covering gap 23 in a hand model is shown, using the left-hand antenna structure shown in Figure 3 as an example. The efficiency in free space is also shown for comparison. Similar to Figures 6 and 7 above, this example also shows the efficiency in the low-frequency B8 band for illustration.

[0073] As shown in Figure 9, after a finger covers gap 23, the hand-mode efficiency shows only a limited decrease compared to the free-space efficiency. Because the radiator 11 near gap 23 in the antenna scheme shown in Figure 3 is directly connected to the ground, even if a finger covers gap 23, the hand-mode efficiency of the antenna is not significantly affected.

[0074] In other embodiments, please refer to Figure 10, which illustrates a simulation of system efficiency corresponding to a finger covering gap 23 in a hand model, using the current loop antenna having the configuration shown in Figure 4 as an example. The efficiency in free space is also shown for comparison. Similar to Figures 6 and 7 above, this example also shows the efficiency at low frequencies for illustration.

[0075] As shown in Figure 10, compared with the simulation results in Figure 7, the hand mode efficiency drops significantly after the finger covers slot 23. For example, at around 900 MHz, the efficiency of the left-hand mode deteriorates from nearly -8 dB when slot 23 is uncovered to -10 dB. This means that when the finger covers the distal slot (e.g., slot 23 away from the feed source), the hand mode performance of the current loop antenna deteriorates further.

[0076] The above implementations of side antennas are described using the reuse of the side metal frame as the antenna radiator. It is understood that similar issues arise when left-handed antennas or current loop antennas are implemented using other methods (such as FPC antennas, LDS antennas, etc.).

[0077] In summary, among the current solutions for implementing side antennas, some have a small hand mode drop but poor free space performance (such as the left-hand antenna shown in Figures 2 and 3); others have better free space but a large hand mode drop (especially the hand mode scenario when the finger covers the gap), such as the current loop antenna shown in Figure 4.

[0078] Based on this, embodiments of the present application provide an antenna solution that can simultaneously provide good free-space performance and minimal hand-mode degradation, that is, it also has good hand-mode radiation performance. When this antenna solution is installed as a side antenna in an electronic device, the electronic device can have good wireless communication capabilities in both free-space and hand-mode scenarios.

[0079] The antenna scheme provided in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0080] It should be noted that the antenna solution provided in the embodiments of the present application can be applied to electronic devices, such as terminal electronic devices. Correspondingly, the antenna solution involved in the present application can also be referred to as a terminal antenna.

[0081] In various implementations, the electronic device 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 embodiments of the present application do not impose any particular restrictions on the specific type of the electronic device.

[0082] As a possible implementation, the electronic device involved in the embodiment of the present application may include a processor, an external memory interface, an internal memory, a universal serial bus (USB) connector, a charging management module, a power management module, a battery, an antenna 1, an antenna 2, a mobile communication module, a wireless communication module, an audio module, a speaker, a receiver, a microphone, an earphone interface, a sensor module, a button, a motor, an indicator, a camera module, a display, and a subscriber identification module (SIM) card interface, etc. The sensor module may include a pressure sensor, a gyroscope sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, a bone conduction sensor, etc.

[0083] Taking the electronic device as a mobile phone as an example, the terminal antenna provided in the embodiment of the present application can be set on the long side of the mobile phone, corresponding to the side antenna in the aforementioned example, thereby providing better free space and radiation performance under the hand model.

[0084] In different implementations, the specific implementation of the terminal antenna may be different. In some embodiments, the radiator of the terminal antenna may fully or partially reuse the metal frame of the electronic device. In other embodiments, the radiator of the terminal antenna may also be implemented in the form of a flexible printed circuit (FPC), an anodized die-casting process (MDA), etc. The embodiments of the present application do not limit the specific implementation form of the terminal antenna radiator.

[0085] The following example uses the metal frame as an example for the antenna radiator.

[0086] For example, please refer to Figure 11, which is a schematic diagram of an electronic device provided in an embodiment of the present application. In this example, the electronic device can be a mobile phone.

[0087] As shown in Figure 11, the interior of the electronic device can be provided with a printed wiring board (PWB), a battery (BAT) and another PWB from top to bottom. Among them, the PWB provided above the battery can be called the main PWB, and the PWB below the battery can be called the sub-PWB. The main PWB and the sub-PWB can be used as carriers of other electrical components in the electronic device, and interconnection between the various components can be achieved through electrical connection lines. In addition, the main PWB and the sub-PWB can also form a reference ground for other electronic components in the electronic device together with the metal middle frame of the electronic device (if any).

[0088] In this example, the electronic device has a metal frame structure. One or more slits extending through the metal frame are provided, thereby breaking the metal frame into multiple separate metal segments. In some implementations, the side of the electronic device can be separated by two through-slits to obtain a metal frame having a length less than 1 / 2 wavelength and greater than 1 / 4 wavelength of the antenna operating frequency band. This metal frame can correspond to the radiator 51 shown in Figure 11, which is used as the radiator in the antenna solution provided in the embodiment of the present application. As shown in Figure 11, the projection of the radiator 51 in this example toward the center of the electronic device may include at least a portion falling on the battery. It is understood that, generally speaking, due to the significant impact of the battery on the antenna, the antenna is not placed near the battery (such as the position of the radiator 51 described above). However, the antenna solution provided in the embodiment of the present application can achieve good free-space and hand model radiation performance even when placed close to the battery. In some implementations, the two end slits used to separate the radiator 51 from the metal frame can be a first slit and a second slit, respectively.

[0089] It should be noted that in the above example, the length of radiator 51 is limited to: less than 1 / 2 wavelength of the antenna operating frequency band and greater than 1 / 4 wavelength of the antenna operating frequency band. The length of the radiator is not necessarily the physical length of the radiator. In some implementations, this length can be a length converted from electrical loss parameters such as the dielectric constant and loss tangent of the material constituting the metal frame, or it can be an electrical length; similarly, the following are examples.

[0090] As shown in Figure 11, at least three electrical connection points can be set on the radiator 51. Such as electrical connection point 61, electrical connection point 62, and electrical connection point 63. The electrical connection point 61, electrical connection point 62, and electrical connection point 63 can be used for coupling feed source, grounding setting, etc. respectively. As a result, when the antenna is working, the radiator 51 can be fed with a feed signal for excitation. In addition, based on reasonable grounding and the setting of other components, the excitation of the required mode is achieved. For example, the common mode (CM) mode and the differential mode (DM) mode are excited. In some implementations, the electrical connection point 61 can correspond to the first electrical connection point. The electrical connection point 62 can correspond to the second electrical connection point. The electrical connection point 63 can correspond to the third electrical connection point.

[0091] As a specific example, Figure 12 is a logic diagram of an antenna provided in an embodiment of the present application, which provides a specific example of the functional settings of each electrical connection point.

[0092] As shown in Figure 12, the electrical connection point 61 can be coupled to the feed source for receiving the feed signal. In some embodiments, a first tuning component can be provided between the electrical connection point 61 and the feed source, and the first tuning component can be a first capacitor.

[0093] In this example, the electrical connection point 62 can be grounded. In other embodiments, the electrical connection point 62 can be provided with a tuning component such as an inductor (not shown) before being grounded to tune the electrical length of the current on the radiator flowing back from the electrical connection point 62 to the ground.

[0094] The electrical connection point 63 can be connected to the ground via a second tuning component, and the second tuning component can be used to tune the electrical parameters of the current on the radiator returning from the electrical connection point 63 to the ground.

[0095] In the examples shown in Figures 11 and 12, electrical connection points 61 to 63 are sequentially arranged on the radiator 51. In some embodiments, as shown in Figure 13, the three electrical connection points can be located on three parts of the radiator 51. As shown in Figure 13, the radiator 51 can be divided into three equal parts: a first part, a second part, and a third part, in the direction from the feed source to the ground, with the second part located between the first and third parts. The first, second, and third parts have the same length. Electrical connection point 61 can be located on the first part of the radiator 51. Electrical connection point 62 can be located on the second part of the radiator 51. Electrical connection point 63 can be located on the third part of the radiator 51.

[0096] In different embodiments, the position of each electrical connection point on the corresponding portion of the radiator 51 can be flexibly adjusted.

[0097] In some embodiments, as shown in the example of Figure 12 , the three electrical connection points can be located separately from each other. For example, electrical connection point 61 can be located on the first portion of radiator 51, at an end of the first portion away from the second portion. Electrical connection point 62 can be located anywhere on the second portion (e.g., in the middle, at either end of the second portion, etc.). Preferably, electrical connection point 62 is located in the middle of the second portion; electrical connection point 63 can be located on the third portion, at an end away from the second portion.

[0098] In other embodiments, as shown in FIG12 , any two of the three electrical connection points may be located adjacent to each other. Referring to FIG13 , electrical connection point 61 may be located on the first portion of radiator 51, near the end of the second portion. Electrical connection point 62 may be located on the second portion, near the end of the first portion. Electrical connection point 63 may be located anywhere on the third portion, such as away from the end of the second portion.

[0099] It is understood that Figures 12 and 13 are merely examples of the locations of two electrical connection points on the radiator. In other embodiments, each electrical connection point may also be located at other locations on a portion of the radiator corresponding to each radiator 51. The specific locations of each electrical connection point are not limited in the embodiments of the present application.

[0100] Under different electrical connection point locations, the implementation of coupling the feed source and grounding at the electrical connection points can refer to the example in Figure 12. That is, electrical connection point 61 is coupled to the feed source, electrical connection point 62 is coupled to the ground, and electrical connection point 63 is coupled to the ground.

[0101] For example, the electrical connection point arrangement shown in Figure 13 is used as an example. Referring to Figure 14 , electrical connection point 61 on the first portion is positioned adjacent to electrical connection point 62 on the second portion. This allows the feed source to be positioned adjacent to the ground point corresponding to electrical connection point 62. Furthermore, another grounding device coupled to electrical connection point 63 may be provided at the end of radiator 51, distal from the feed source.

[0102] In the following examples, the electrical connection point arrangement shown in FIG12 (i.e., electrical connection points 61 and 63 are arranged at both ends of radiator 51, and electrical connection point 62 is arranged at any position on the second portion) is used as an example. In different implementations, the specific implementation of the first tuning component and the second tuning component may vary.

[0103] Referring to Figure 15A , in this example, the first tuning component and the second tuning component can each be implemented using capacitors. For example, as shown in Figure 15A , the first tuning component can include capacitor 41, and the second tuning component can include capacitor 42. In some implementations, capacitor 41 can correspond to the first capacitor, and capacitor 42 can correspond to the second capacitor. Preferably, capacitors 41 and 42 are lumped capacitors with fixed capacitance.

[0104] In some embodiments, the capacitor 41 may be configured to correspond to a left-handed capacitor, for example, the capacitor 41 may be configured to be less than 5 pF, thereby stimulating at least a portion of the radiator 51 to radiate in a left-handed mode.

[0105] The size of capacitor 42 can be selected based on the operating frequency band. For example, when the antenna operates at a low frequency, the capacitance of capacitor 42 can be within the range of 0 to 8 pF. When the antenna operates at a medium frequency and / or high frequency, the capacitance of capacitor 42 can be within the range of 0 to 5 pF.

[0106] It is understood that the second tuning component function implemented by capacitor 42 as shown in FIG15A is only an example. By grounding capacitor 42 at the end of radiator 51, a differential mode DM can be excited on radiator 51.

[0107] In other embodiments, as shown in FIG15B , the function of the second tuning component can also be implemented by an inductor. In some implementations, the inductor in the second tuning component can also be referred to as a first inductor. When the antenna operates at a low frequency, the inductance of the first inductor can be within a range of 10 nH to 82 nH. When the antenna operates at a medium frequency and / or high frequency, the inductance of the first inductor can be within a range of 5 nH to 27 pF.

[0108] Taking the antenna implementation shown in FIG. 15A as an example, the radiation performance that can be obtained by the antenna is described below in combination with simulation.

[0109] For example, the antenna solution shown in Figure 15A is used as a side antenna on a mobile phone. As shown in Figure 16, the three electrical connection points provided on the side antenna from top to bottom are: electrical connection point 61, electrical connection point 62, and electrical connection point 63. The connection between each electrical connection point and the feed / ground is shown in Figure 15A.

[0110] The simulation is performed by taking the overall size of 152×75×5 (mm), the antenna clearance of 1 mm, and the antenna radiator (ie, radiator 51) of 77.5 mm in length, 3.5 mm in width, and 5 mm in height as an example.

[0111] Figure 16 shows the S-parameter simulation results of this antenna model in free space. From the perspective of return loss, the antenna can simultaneously excite two resonances: the CM resonance on the low-frequency side and the DM resonance on the high-frequency side. The DM resonance can primarily cover the antenna's operating frequency band in free space. For example, in this example, the antenna's operating frequency band can include the low-frequency B8 band. It can be understood that the CM resonance is primarily located in the low-frequency direction of the B8 band, but the combined effects of the CM and DM resonances significantly lower the low-frequency portion of the B8 band in free space. Therefore, the CM resonance also contributes to low-frequency free-space radiation.

[0112] From an efficiency perspective, Figure 16 shows both the optimal efficiency (i.e., radiation efficiency) achievable with perfect matching at all frequencies, and the efficiency (i.e., system efficiency) achieved with current port matching. In the B8 band, near 900 MHz, the radiation efficiency exceeds -6 dB, and the system efficiency reaches -6 dB. Therefore, the antenna solution shown in Figure 15A achieves excellent free-space radiation performance.

[0113] Figures 17 and 18 provide current simulation and directional diagrams for CM and DM resonance, respectively. Darker colors indicate stronger currents and gains.

[0114] Figure 17 shows the current simulation and directional pattern of CM resonance. As shown in Figure 17, in the CM resonance mode, the current converges from both ends to the middle of the antenna radiator, showing the characteristics of current reversal on the radiator, which corresponds to the typical current distribution of CM. In the distribution of floor current, this CM resonance mode can excite currents that are significantly diagonally upward and diagonally downward on the floor. In this way, based on orthogonal decomposition, the longitudinal currents cancel each other out, and the transverse currents superimpose each other. Therefore, this CM resonance mode can effectively excite transverse currents on the floor. Corresponding to the directional pattern, as shown in Figure 17, the directional pattern shows an upward diagonal direction.

[0115] Figure 18 shows the current simulation and directional pattern of DM resonance. As shown in Figure 18, in the DM resonance mode, current flows from one end of the antenna radiator to the other without reversing directions, corresponding to the typical DM current distribution. In the floor current distribution, this DM resonance mode can excite significant longitudinal currents in the floor. Corresponding to the directional pattern, the lateral gain distribution is significantly stronger than the longitudinal gain distribution.

[0116] It is understandable that low-frequency radiation is generally radiated mainly through the floor. In this example, the DM mode can excite significant longitudinal floor currents when working, such as effectively exciting the longitudinal characteristic mode of the floor. Taking the electronic device as a mobile phone as an example, the longitudinal dimension of the mobile phone (i.e., the length of the long side) is close to 150mm, which is close to 1 / 2 wavelength of the low frequency. Therefore, by stimulating the longitudinal characteristic mode of the floor, the low-frequency radiation performance can be significantly improved. Based on this, the antenna scheme provided in this application can excite the longitudinal characteristic mode of the floor through DM resonance, thereby obtaining better free-space radiation performance.

[0117] Figures 19 and 20 provide schematic diagrams of the electric field simulations for CM resonance and DM resonance, respectively. The darker the color, the stronger the electric field.

[0118] Figure 19 shows the electric field distribution in the CM resonance mode. At both 0° and 90° phases, radiator 51 can radiate a normal electric field perpendicular to the radiator into the external space. As is well known to those skilled in the art, the human body absorbs tangential electric fields significantly, but not significantly normal electric fields. In other words, the CM mode excited in this application does not significantly degrade performance due to the proximity of the hand model. Therefore, this CM resonance mode can be used to improve the radiation performance of the hand model in this application.

[0119] Figure 20 shows the electric field distribution in the DM resonance mode. At both 0° and 90° phases, radiator 51 can radiate a tangential electric field perpendicular to the radiator into the external space. As is well known to those skilled in the art, the human body significantly absorbs tangential electric fields. However, the present invention, through design, enables the excited DM mode to generate a longitudinal floor eigenmode. By stimulating this longitudinal floor eigenmode, low-frequency radiation performance can be significantly enhanced, thereby improving the DM mode radiation performance and achieving better radiation performance. Furthermore, compared to the DM mode in free space, the hand model significantly absorbs this DM mode.

[0120] Combined with the description of Figures 19 and 20, the antenna solution shown in Figure 15A can provide good radiation capability through the DM mode when operating in free space. In the hand model scenario, the CM mode can effectively reduce hand model absorption and improve the antenna's radiation capability in the hand model scenario.

[0121] Figure 16 above provides an efficiency simulation diagram in free space, which corresponds to the electric field / current distribution shown in Figures 17 to 20. Figure 21 below provides an S-parameter simulation diagram of the antenna solution shown in Figure 15A under a hand model to further illustrate the above.

[0122] As shown in Figure 21, the return loss for the CM mode near low frequencies shows no significant change. However, the corresponding DM mode resonances undergo significant changes in both the left-hand and right-hand modes. It's understandable that the deeper the resonance of the DM mode, corresponding to the greater absorption of the hand mode, the greater impact of the hand mode on the DM mode is evident.

[0123] From the perspective of system efficiency, in this example, since the CM mode is insensitive to the hand mode, the hand mode efficiency in the operating frequency band (B8) is guaranteed. The free-space efficiency of B8 is covered by the DM mode. As shown in Figure 21, in free-space, the average B8 efficiency of this solution reaches -4.6dB, with the left-hand mode efficiency at -7.8dB and the right-hand mode efficiency at -7.9dB. The efficiency of both hands is well balanced, with a drop of only 3.3dB.

[0124] Combined with the description of Figures 8-10 above, in current antenna solutions, if a finger blocks the gap at the end of the antenna (such as gap 23) in a hand model scenario, it will cause a more significant drop in the hand model amplitude. However, the technical solutions provided in the embodiments of this application (such as any of the antenna solutions in Figures 11-15B) can effectively overcome this problem.

[0125] For example, Figure 22 shows a simulation of left and right hand efficiency with a hand-sealed gap. Compared to the normal hand-sealed gap shown in Figure 21, the left and right hand system efficiency remains unchanged with this gap-sealed gap. However, with existing antenna solutions (such as current loop antennas), as illustrated in Figures 7 and 10, system efficiency significantly deteriorates again after the gap is sealed.

[0126] Based on the above description of FIG15A , it can be seen that the antenna solution shown in FIG15A can provide better free-space radiation performance through the DM mode, and can improve the hand model efficiency through the coverage of the CM mode.

[0127] Specifically, in conjunction with Figures 15A-22, Table 1 below shows a comparison of the high, medium, and low channel efficiencies for various antenna solutions implemented in the B8 operating frequency band. The B8 low channel corresponds to 880 MHz, the B8 medium channel corresponds to 920 MHz, and the B8 high channel corresponds to 960 MHz.

[0128] Table 1

[0129] In the example of Table 1, the antenna solution provided by this application may be the simulation result of the antenna solution shown in Figure 15A. The current loop antenna solution may be the antenna solution shown in Figure 4. The left-hand antenna solution may be the antenna solution shown in Figure 2 or Figure 3. It can be seen from Table 1 that, taking the antenna scheme provided in this application as an example, in the free space scenario, the antenna efficiency obtained in the B8 low channel band is -4.7dB, the antenna efficiency obtained in the B8 medium channel band is -3.9dB, and the antenna efficiency obtained in the B8 high channel band is -5.1dB. Therefore, the average antenna efficiency obtained in the B8 band is -4.6dB; it will change when the hand is held. Taking the left hand as an example, in the left-hand mode scenario, the antenna efficiency obtained in the B8 low channel band is -7.6dB, the antenna efficiency obtained in the B8 medium channel band is -7.6dB, and the antenna efficiency obtained in the B8 high channel band is -8.1dB. Therefore, the average antenna efficiency of the left-hand mode obtained in the B8 band is -7.8dB; thus, it can be obtained that the average reduction in antenna efficiency of the left-hand mode relative to free space is -3.2dB, that is, -7.8dB-(-4.6dB). Similarly, when the user covers the gap with their left hand, that is, in the left-hand mode (sealing gap) scenario, the average reduction in antenna efficiency relative to free space is -3.6dB. In the prior art, the antenna efficiency obtained in the left-hand mode scenario using the current loop solution has an average reduction of -3.8dB relative to the antenna efficiency in free space. Compared with the -3.2dB of the present invention, the reduction in hand mode is not significant. The antenna efficiency obtained in the left-hand mode (sealing gap) scenario using the current loop solution has an average reduction of -5.6dB relative to the antenna efficiency in free space. This is a 2dB reduction in antenna efficiency relative to the technical solution of the present invention. Similarly, the average antenna efficiency in the free space scenario using the left-hand solution is -7.7dB. Compared with the average antenna efficiency of -4.6dB obtained by the present invention in free space in the B8 frequency band, the antenna efficiency in free space using the left-hand solution is reduced by 3.1dB. Therefore, in both the left-hand mode scenario and the left-hand mode (sealing gap) scenario, the reduction in hand mode using the left-hand solution is not significant. As can be seen, the free-space efficiency of the antenna solution provided by this application is superior to that of a left-handed antenna in free space, and the hand-mode efficiency of the antenna solution provided by this application is superior to that of a current loop antenna. Therefore, the antenna solution provided by the embodiment of this application, as shown in Figure 15A, can provide good radiation performance in various scenarios.

[0130] It should be understood that the above simulation examples all use the antenna scheme shown in Figure 15A as an example. It should be understood that the antenna schemes provided in any of Figures 11-14 operate similarly to the antenna scheme shown in Figure 15A, both of which can improve hand mode efficiency through the CM mode and provide good free space efficiency through the DM mode. Therefore, other implementations can also achieve the aforementioned effect of providing good radiation efficiency in various scenarios.

[0131] It should be noted that in FIG15A , capacitor 41 functions as a first tuning component, and capacitor 42 functions as a second tuning component. In conjunction with the foregoing description, the first tuning component can also implement its tuning function using other components. For example, as shown in FIG15B , the second tuning component can be an inductor, etc. In this way, coverage of a single operating frequency band can be achieved using inductors or capacitors of fixed size.

[0132] In other embodiments, the functions of the first tuning component and / or the second tuning component can also be achieved through a switch including at least two switching paths. When the switch is switched to different paths, the antenna can be tuned to cover at least one operating frequency band via the inductive / capacitive components in the corresponding paths. In other words, when the antenna needs to operate in a different wireless communication frequency band, the electronic device can control the switch to connect the corresponding paths, thereby switching the antenna's operating frequency band to the corresponding wireless communication frequency band.

[0133] As an example, as shown in Figure 23, the first tuning component may include SW0. For example, the SW0 may include the capacitor 41 in the aforementioned example. The second tuning component may include SW1. A third tuning component may also be provided on the antenna; the third tuning component is connected at the position of the electrical connection point 61 or near the electrical connection point 61. For example, the third tuning component may include SW2. One end of the SW2 may be connected to the radiator 51, or to the path between SW0 and the radiator 51. The other end of the SW2 may be connected to the ground. This allows the SW2 to be connected in parallel to the feed link. It should be noted that in other logical divisions, the SW2 may also be included in the first tuning component. In the following example, one end of SW2 is connected to the electrical connection point 61 and the other end is connected to the ground.

[0134] In the example shown in FIG23 , SW1 and SW2 may each include at least two switching paths, with different sensing / capacitive components disposed on different switching paths.

[0135] For example, SW2 includes two switching paths, and capacitors of different capacitance values ​​are set on each path. As shown in Figure 24, SW2 may include a switch 71, a capacitor 81, and a capacitor 82. The input end included in the switch 71 is connected to the electrical connection point 61 on the radiator 51. The first output end included in the switch 71 is connected to one end of the capacitor 81, and the other end of the capacitor 81 is connected to the ground. The second output end included in the switch 71 is connected to one end of the capacitor 82, and the other end of the capacitor 82 is connected to the ground. The capacitance values ​​of the capacitor 81 and the capacitor 82 may be different. In different working scenarios, the capacitor 81 or the capacitor 82 is connected to the feeding path by switching the switch 71, so that the coverage frequency band of the CM mode excited on the antenna is adjusted.

[0136] In some implementations, the capacitor provided in SW2 may also be referred to as a third capacitor. For example, the capacitor 81 and the capacitor 82 may both be referred to as the third capacitor.

[0137] Take, for example, SW1, which includes two switching paths, each with a capacitor of a different capacitance. As shown in Figure 25, SW1 may include a switch 72, a capacitor 91, and a capacitor 92. The first input terminal of switch 72 is connected to the electrical connection point 63 on the radiator 51. The first output terminal of switch 72 is connected to one end of capacitor 91, with the other end of capacitor 91 connected to ground. The second output terminal of switch 72 is connected to one end of capacitor 92, with the other end of capacitor 92 connected to ground. The capacitances of capacitors 91 and 92 may differ. In some embodiments, the capacitances of capacitors 91 and 92 may be selected based on the relationship between the operating frequency band and the capacitance of capacitor 42 in the aforementioned example. In different operating scenarios, capacitors 91 or 92 are connected to the ground path by switching switch 72, so that the frequency band covered by the DM mode excited on the antenna can be adjusted. It should be understood that in other embodiments, SW1 may also include at least one switching path for inductance, so that when the path is turned on, the magnetic flux loop mode is excited on the radiator for operation. In the following examples, SW1 including the components shown in FIG25 is taken as an example.

[0138] In some implementations, the capacitor provided in SW1 may also be referred to as the second capacitor. For example, capacitor 91 and capacitor 92 may both be referred to as the third capacitor. In other implementations, when SW1 includes an inductor, the inductor in each path may be referred to as the first inductor.

[0139] In some embodiments, when adjusting the low frequency band covered by the antenna, increasing the capacitance of SW2 causes the corresponding CM mode to shift toward low frequencies, while increasing the capacitance of SW1 causes the corresponding DM mode to shift toward low frequencies.

[0140] As a specific implementation, as shown in Figure 26, by simultaneously switching different paths of SW2 and SW1, the coverage adjustment of the low-frequency working band can be achieved. In this example, the electronic device controls the switch 71 in SW2 to turn on the capacitor 81, and controls the switch 72 in SW1 to turn on the capacitor 91, which corresponds to state 1 shown in the figure. In this state 1, the DM mode can cover the B8 frequency band, and the resonant frequency of the CM mode can be located in the low-frequency direction of the B8 frequency band to improve the hand model efficiency of B8. When the antenna needs to switch to work in B28, the electronic device can control the switch 71 in SW2 to turn on the capacitor 82, and control the switch 72 in SW1 to turn on the capacitor 92, which corresponds to state 2 shown in the figure. The capacitor 82 can be greater than the capacitor 81, and the capacitor 92 can be greater than the capacitor 91. In this state 2, the DM mode can be used to cover B28, and the resonant frequency of the CM mode can be located in the low-frequency direction of the B28 frequency band to improve the hand model efficiency of B28.

[0141] This achieves the low-frequency switching effect of this antenna solution. Under different low-frequency operating conditions, both CM and DM modes can be excited on the radiator, effectively ensuring both free-space and hand-mode efficiencies.

[0142] It should be understood that in other embodiments, in order to achieve wider frequency band coverage, more switching paths may be provided in SW2 and / or SW1 so as to switch to corresponding paths for operation in different scenarios.

[0143] Although the present application has been described with reference to specific features and embodiments thereof, it is apparent 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 cover 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, the present application is intended to include such modifications and variations as 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 applied to an electronic device, wherein the electronic device is provided with a metal frame, and a first slot and a second slot are formed on the metal frame; the metal frame between the first slot and the second slot constitutes a first radiator, and the first radiator is not connected to the metal frame outside the first slot and the second slot; The antenna comprises: the first radiator; the first radiator is sequentially provided with a first electrical connection point, a second electrical connection point and a third electrical connection point; The first electrical connection point is coupled to a feed source through a first tuning component, the second electrical connection point is coupled to a reference ground, and the third electrical connection point is coupled to a reference ground through a second tuning component.

2. The antenna according to claim 1, wherein The first tuning component includes a first capacitor.

3. The antenna according to claim 2, wherein: The second tuning component includes at least one of the following: a capacitor and an inductor.

4. The antenna according to claim 3, wherein: The second tuning component includes at least one second capacitor, and the capacitance of the second capacitor is determined according to the operating frequency band; When the operating frequency band of the antenna covers low frequency, the capacitance of the second capacitor is within the range of 0 to 8 pF; When the working frequency band of the antenna covers medium and high frequencies, the capacitance of the second capacitor is within the range of 0 to 5 pF.

5. The antenna according to claim 3, wherein: The second tuning component includes at least one first inductor, and the inductance of the first inductor is determined according to the operating frequency band; When the operating frequency band of the antenna covers a low frequency, the inductance value of the first inductor is within a range of 10 nH to 82 nH; When the working frequency band of the antenna covers medium and high frequencies, the inductance value of the first inductor is within the range of 5 nH to 27 nH.

6. The antenna according to claim 5, characterized in that The second tuning component includes at least two paths, and when the antenna is working, at least one of the at least two paths is selected to be conductive by a switch; Each of the at least two paths is provided with one second capacitor or one first inductor.

7. The antenna according to claim 6, characterized in that The antenna further comprises a third tuning component, one end of the third tuning component is connected to the first electrical connection point or near the first electrical connection point, and the other end of the third tuning component is connected to a reference ground; The third tuning component includes at least two third capacitors, each of which corresponds to a path, and the capacitance values ​​of the third capacitors on different paths are different; When the antenna is working, at least one of the paths corresponding to the at least two third capacitors is selected to be turned on through the switch.

8. The antenna according to any one of claims 1 to 7, characterized in that The first radiator is equally divided into a first part, a second part and a third part, and the second part is located between the first part and the third part; The first electrical connection point is set at any position on the first part, the second electrical connection point is set at any position on the second part, and the third electrical connection point is set at any position on the third part.

9. The antenna according to claim 8, characterized in that The first electrical connection point is provided on an end of the first portion away from the second portion, and the third electrical connection point is provided on an end of the third portion away from the second portion.

10. The antenna according to any one of claims 1 to 7 and 9, characterized in that: When the antenna is in operation, a first resonance and a second resonance are excited. The frequency of the first resonance is lower than that of the second resonance. The first resonance is excited by a common mode CM, and the second resonance is excited by a differential mode DM.

11. The antenna according to claim 10, wherein: When the capacitance of the third capacitor in the third tuning component of the antenna is switched to be smaller, the first resonance shifts to a higher frequency.

12. The antenna according to claim 11, wherein: When the capacitance value of the second capacitor in the second tuning component is switched to be smaller, the second resonance shifts to a higher frequency.

13. The antenna according to any one of claims 1-7, 9, 11-12, characterized in that: The terminal antenna is arranged on a long side of the electronic device.

14. The antenna according to any one of claims 1-7, 9, 11-12, characterized in that: The length of the first radiator is greater than 1 / 4 wavelength of the working frequency band and less than 1 / 2 wavelength of the working frequency band.

15. An electronic device, characterized in that: The electronic device is provided with a terminal antenna as described in any one of claims 1 to 14; when the electronic device transmits or receives a signal, the signal is transmitted or received through the terminal antenna.

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