Electronic device

Abstract

The invention relates to the technical field of electronic products, in particular to electronic equipment. The electronic equipment provided by the invention comprises a metal radiator, a first conductive cavity and a second conductive cavity, the metal radiator is provided with a feeding point, the metal radiator comprises a first part and a second part, and the first part and the second part interact electric signals with the feeding point; the first part is arranged corresponding to the first conductive cavity, the first conductive cavity comprises a first window, the first window is opposite to the first part, and the first conductive cavity is used for receiving energy corresponding to an electric signal radiated to the first conductive cavity by the first part and emitting the energy from the first window; the volume of the second conductive cavity is different from that of the first conductive cavity, the second part corresponds to the second conductive cavity, the second conductive cavity comprises a second window, the second window is opposite to the second part, and the second conductive cavity is used for receiving energy corresponding to an electric signal radiated to the second conductive cavity by the second part and emitting the energy from the second window.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of electronic products, and in particular to an electronic device. BACKGROUND

[0002] With the update iteration of electronic devices, the current electronic device environment has higher and higher requirements for antennas, not only in terms of antenna performance, but also in terms of noise shielding. With the influence of narrow-screen and mechanism ornament space of electronic devices, the space left for the antenna is greatly limited. Traditional antennas mainly include PCB antennas, FPC antennas, LDS antennas and the like, but these antennas are greatly affected by the environment, require a large antenna clearance, will affect the appearance, and the antenna is close to the noise source, which requires a large number of noise solutions to solve the influence of noise. SUMMARY

[0003] The present disclosure provides an electronic device to at least solve the above technical problems existing in the prior art.

[0004] The present disclosure provides an electronic device, comprising: a metal radiator having a feed point, the metal radiator comprising a first part and a second part, the first part and the second part interacting electrical signals with the feed point; a first conductive cavity, the first part being correspondingly arranged with the first conductive cavity, the first conductive cavity comprising a first window, the first window being opposite to the first part, the first conductive cavity being used for receiving energy corresponding to electrical signals radiated by the first part to the first conductive cavity and emitting from the first window; a second conductive cavity, different in volume from the first conductive cavity, the second part being correspondingly arranged with the second conductive cavity, the second conductive cavity comprising a second window, the second window being opposite to the second part, the second conductive cavity being used for receiving energy corresponding to electrical signals radiated by the second part to the second conductive cavity and emitting from the second window.

[0005] Further, the volume of the first conductive cavity is greater than the volume of the second conductive cavity, and the length of the first part is greater than the length of the second part, wherein the first conductive cavity corresponds to low-frequency signals, and the second conductive cavity corresponds to high-frequency signals.

[0006] Further, the length of the first part is 1 / 4 of the wavelength of the low-frequency signal, and the length of the second part is 1 / 4 of the wavelength of the high-frequency signal.

[0007] Further, the first part radiates low-frequency signals into the first conductive cavity, and the low-frequency signals are radiated out through the first window after resonating in the first conductive cavity; The second part radiates a high frequency signal into the second conductive cavity, and the high frequency is radiated out through the second window after resonating in the second conductive cavity.

[0008] Further, the first part and the second part are respectively located on two sides of the feed point to respectively guide the energy of the electrical signals of the corresponding frequencies to the first conductive cavity and the second conductive cavity.

[0009] Further, the electronic device comprises a first shell and a second shell connected to each other, and a space is formed between the first shell and the second shell, and the metal radiator, the first conductive cavity and the second conductive cavity are all arranged in the space.

[0010] Further, the second shell is a metal piece, and the first conductive cavity, the second conductive cavity and the second shell are connected through conductive foam.

[0011] Further, the first shell is made of plastic, and the first window and the second window are arranged opposite to the first shell.

[0012] Further, the first shell is made of metal, and the first shell is provided with a gap, and the first window and the second window are arranged opposite to the gap.

[0013] Further, the width W of the gap satisfies: 2mm≤W≤3mm.

[0014] Compared with the prior art, the technical scheme provided by the embodiments of the present disclosure has the following advantages: The electronic device provided by the embodiments of the present disclosure comprises a metal radiator, a first conductive cavity and a second conductive cavity; the metal radiator has a feeding point, and the metal radiator comprises a first part and a second part, and the first part and the second part interact with the electric signal of the feeding point; the first part is arranged correspondingly with the first conductive cavity, the first conductive cavity comprises a first window, the first window is opposite to the first part, and the first conductive cavity is used for receiving the energy corresponding to the electric signal radiated by the first part to the first conductive cavity and emitting from the first window; the second conductive cavity is different in volume from the first conductive cavity, the second part is arranged correspondingly with the second conductive cavity, the second conductive cavity comprises a second window, the second window is opposite to the second part, and the second conductive cavity is used for receiving the energy corresponding to the electric signal radiated by the second part to the second conductive cavity and emitting from the second window. The first part and the second part of the metal radiator interact with the electric signal of the feeding point, and direct the energy to the corresponding conductive cavities through the first part and the second part. The conductive cavity itself has a certain electromagnetic shielding effect, which can reduce the interference of the external environment on the radiator and the signal; at the same time, the conductive cavity concentrates the output energy through the first window and the second window, reduces the dispersion loss of the signal in the transmission process, and reduces the electromagnetic interference on other components inside the device. Compared with the traditional antenna which needs to add noise reduction schemes such as wave-absorbing material and metal shielding, the design can simplify the anti-interference structure and reduce the cost. The first part and the second part of the metal radiator are used to correspondingly cooperate with the first conductive cavity and the second conductive cavity which are different in volume, respectively, so that at least two frequency bands of signal processing can be supported at the same time.

[0015] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will be more apparent from the following detailed description read in conjunction with the accompanying drawings, in which: In the drawings, identical or corresponding reference numerals indicate identical or corresponding parts.

[0017] Figure 1 A partial structure schematic diagram of an electronic device provided by the embodiments of the present disclosure is shown; Figure 2 A structure schematic diagram of a cavity antenna in an electronic device provided by the embodiments of the present disclosure is shown; Figure 3 A partial cross-sectional structure schematic diagram of an electronic device provided by the embodiments of the present disclosure is shown; Figure 4Another partial structural schematic diagram of the electronic device provided by the embodiments of the present disclosure is shown.

[0018] Label explanation in the figure: 1, first conductive cavity; 11, first window; 2, second conductive cavity; 21, second window; 3, metal radiator; 31, first part; 32, second part; 33, feed point; 4, first shell; 41, gap; 5, second shell; 6, battery; 7, conductive foam. DETAILED DESCRIPTION

[0019] In order to make the purpose, features and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present disclosure.

[0020] In combination with Figure 1 , Figure 2 , Figure 3 and Figure 4 , the electronic device provided by the embodiments of the present disclosure includes a metal radiator 3, a first conductive cavity 1 and a second conductive cavity 2; the metal radiator 3 has a feed point 33, and the metal radiator 3 is used to receive an electrical signal transmitted by the feed point 33 and convert the electrical signal into an electromagnetic wave of a target frequency, or the metal radiator 3 is used to convert a received electromagnetic wave of a target frequency into an electrical signal and transmit the electrical signal to the feed point 33. The metal radiator 3 includes a first part 31 and a second part 32, and the first part 31 and the second part 32 interact with the feed point 33; the first part 31 is arranged corresponding to the first conductive cavity 1, and the first conductive cavity 1 includes a first window 11, and the first window 11 is opposite to the first part 31; the first conductive cavity 1 is used to receive energy corresponding to the electrical signal radiated by the first part 31 to the first conductive cavity 1 and emit from the first window 11; the first conductive cavity 1 can receive energy corresponding to the electrical signal of the first part 31, and emit all energy corresponding to the electrical signal from the first window 11 to form a radiated electric field, which can avoid energy loss, improve antenna efficiency and improve antenna performance.

[0021] The second conductive cavity 2 is different in volume from the first conductive cavity 1, the second part 32 is arranged in correspondence with the second conductive cavity 2, the second conductive cavity 2 comprises a second window 21, the second window 21 is opposite to the second part 32, and the second conductive cavity 2 is used for receiving energy corresponding to the electrical signal radiated by the second part 32 to the second conductive cavity 2 and emitting from the second window 21. The second conductive cavity 2 can receive the energy corresponding to the electrical signal of the second part 32, and emit the entire energy corresponding to the electrical signal from the second window 21 to form a radiated electric field, which can avoid energy loss, improve antenna efficiency, and improve antenna performance.

[0022] The first part 31 and the second part 32 of the metal radiator 3 interact with the electrical signal of the feed point 33, and energy is radiated to the corresponding conductive cavity through the first part 31 and the second part 32. The electrical signal interacting between the metal radiator 3 and the feed point 33 excites varying currents in the first part 31 and the second part 32 (since the electrical signal changes over time, the currents excited in the first part 31 and the second part 32 are also changing). According to Maxwell's electromagnetic theory, the varying currents will generate a varying magnetic field, and the varying magnetic field will generate a varying electric field. The electric field and the magnetic field continuously excite each other, thereby forming electromagnetic waves of the above-mentioned target frequency. In the embodiment, the first conductive cavity 1 cooperates with the first part 31 of the metal radiator 3 to guide electromagnetic waves of the first frequency to the first window 11, so that the electromagnetic waves of the first frequency can be radiated from the first window 11; the second conductive cavity 2 cooperates with the second part 32 of the metal radiator 3 to guide electromagnetic waves of the second frequency to the second window 21, so that the electromagnetic waves of the second frequency can be radiated from the second window 21. Compared with electronic devices without such a guiding structure, the electronic device of the embodiment can improve the radiation efficiency of the antenna and enhance the transmission capability of the antenna.

[0023] The conductive cavity itself has a certain electromagnetic shielding effect, which can reduce the interference of the external environment on the radiator and the signal; at the same time, the conductive cavity concentrates the output energy through the first window 11 and the second window 21, which can effectively receive and direct the signal energy, reduce the dispersion loss of the signal in the transmission process, and reduce the electromagnetic interference on other components inside the device. Compared with the traditional antenna which needs to add additional wave-absorbing material, metal shielding and other noise reduction schemes, this design can simplify the anti-interference structure and reduce the cost. The first part 31 and the second part 32 of the metal radiator 3 are used to correspondingly cooperate with the first conductive cavity 1 and the second conductive cavity 2 which are different in volume, respectively, so as to support signal processing of at least two frequency bands at the same time.

[0024] In addition, through the structure of the first portion 31 and the second portion 32 of different lengths of the metal radiator 3, one-time transmission and automatic frequency division can be realized, and the separation processing of high-frequency signals and low-frequency signals can be realized without adding a frequency division circuit, thereby ensuring that multiple frequency bands work independently and do not interfere with each other.

[0025] The first conductive cavity 1 and the second conductive cavity 2 can be cavities formed of a conductive material such as metal, or can be cavities formed of a non-conductive material such as plastic or resin, and a conductive radiator arranged on the surface of the non-conductive material, or a conductive radiator embedded in the non-conductive material.

[0026] When the electronic device transmits a signal, the feed source (not shown in the figure) is in a transmitting state, the feed source transmits an electrical signal to the feed point 33, the feed point 33 conducts the electrical signal to the metal radiator 3, and the metal radiator 3 converts the electrical signal into an electromagnetic wave of a target frequency according to the principle of electromagnetic induction, and radiates out from the first window 11 and the second window 21, thereby improving the directivity and efficiency of transmission.

[0027] When the electronic device receives a signal, the energy contained in the electromagnetic wave carrying information from the outside enters the first conductive cavity 1 and the second conductive cavity 2 through the first window 11 and the second window 21, and the energy is conducted along the surface of the conductive wall of the first conductive cavity 1 and the second conductive cavity 2, and finally penetrates into the space inside the first conductive cavity 1 and the second conductive cavity 2. The energy contained in the electromagnetic wave is transmitted to the feed source through the feed point 33, the feed source converts the energy contained in the electromagnetic wave into an electrical signal, and the electrical signal is transmitted along the predetermined signal path to complete the entire receiving task and provide raw data support for subsequent signal analysis and processing.

[0028] In some specific embodiments, the volume of the first conductive cavity 1 is greater than the volume of the second conductive cavity 2, and the length of the first portion 31 is greater than the length of the second portion 32. The lengths of the first portion 31 and the second portion 32 are different, and they resonate with different frequency signals input by the feed point 33 to radiate electrical signals of corresponding frequencies. Among them, the first conductive cavity 1 corresponds to low-frequency signals, and the second conductive cavity 2 corresponds to high-frequency signals. The first portion 31 is adapted to low-frequency signals with the larger first conductive cavity 1, and the second portion 32 is adapted to high-frequency signals with the smaller second conductive cavity 2, and multi-band coverage is realized through differential design of the structure, meeting the demand of electronic devices for wideband communication.

[0029] Low-frequency signals have a longer wavelength (such as a wavelength of about 12.5 cm in the 2.4 GHz frequency band), and a longer radiation path and a larger resonance space are needed to form effective resonance. Therefore, the longer first portion 31 (radiation branch) can match the 1 / 4 wavelength characteristics of low-frequency signals, and the larger first conductive cavity 1 can provide sufficient space for low-frequency electromagnetic waves to complete resonance cycles, ensuring efficient energy conversion and radiation.

[0030] The high-frequency signal has a shorter wavelength (e.g., 4.2-5.9 cm in the 5.1-7.1 GHz frequency band), and the corresponding radiation path and resonance space are smaller. The shorter second portion 32 and the smaller second conductive cavity 2 can precisely match the wavelength characteristics of the high-frequency signal, avoid energy loss caused by excessive size, and achieve efficient resonance and radiation.

[0031] The embodiment ensures that the high-frequency signal and the low-frequency signal can reach the best resonance state in the respective radiator and cavity system from the physical structure, and significantly improves the signal radiation efficiency of the full frequency band.

[0032] In some specific embodiments, the length of the first portion 31 is 1 / 4 of the wavelength of the low-frequency signal, and the length of the second portion 32 is 1 / 4 of the wavelength of the high-frequency signal. For the low-frequency signal (e.g., 2.4 GHz), the wavelength is relatively long (about 12.5 cm), and the length of the first portion 31 is designed to be 1 / 4 of the wavelength (about 3.1 cm), which can form stable resonance with the low-frequency signal, ensuring that the low-frequency energy input from the feed point 33 is maximally converted into radiation energy, and avoiding energy waste caused by mismatched length, such as avoiding energy reflection in the conductor, conversion into heat loss. For the high-frequency signal (e.g., 5.1-7.1 GHz), the wavelength is relatively short (about 4.2-5.9 cm), and the length of the second portion 32 is designed to be 1 / 4 of the wavelength (about 1.05-1.48 cm), which can also form precise resonance with the high-frequency signal, achieving efficient radiation of high-frequency energy. The embodiment matches the length of the first portion 31 with the wavelength of the low-frequency signal and matches the length of the second portion 32 with the wavelength of the high-frequency signal, ensuring that the energy conversion efficiency of the low-frequency signal and the high-frequency signal in the metal radiator 3 is maximized.

[0033] In some specific embodiments, the first portion 31 radiates the low-frequency signal into the first conductive cavity 1, and the low-frequency signal resonates in the first conductive cavity 1 and is radiated out through the first window 11; the second portion 32 radiates the high-frequency signal into the second conductive cavity 2, and the high-frequency resonates in the second conductive cavity 2 and is radiated out through the second window 21. After the low-frequency signal enters the first conductive cavity 1, it uses the matching relationship between the spatial size of the first conductive cavity 1 and the wavelength of the low-frequency signal (e.g., a larger cavity matches a longer wavelength) to form a stable standing wave in the cavity, and the energy is reflected and superimposed on the cavity wall, eventually forming stronger resonance energy, which is then radiated to space through the first window 11 with less energy loss and higher intensity. After the high-frequency signal enters the second conductive cavity 2, it uses the matching characteristics of the small cavity of the second conductive cavity 2 and the short wavelength of the high-frequency to complete the second resonance, and the energy is more concentrated when radiated through the second window 21, avoiding the problem of easy dispersion of the high-frequency signal due to its short wavelength. The embodiment can ensure that the signals of the two frequency bands can maintain stable transmission quality when working simultaneously.

[0034] In some specific embodiments, the first portion 31 and the second portion 32 are respectively located on two sides of the feeding point 33 to respectively guide the electrical signal energy of the corresponding frequency to the first conductive cavity 1 and the second conductive cavity 2. The feeding point 33 is the input center of the signal energy, and the structure of the first portion 31 and the second portion 32 extending on two sides can realize accurate distribution of the energy: the low-frequency signal energy is conducted to one side through the first portion 31 and naturally flows to the corresponding first conductive cavity 1; the high-frequency signal energy is conducted to the other side through the second portion 32 and naturally flows to the corresponding second conductive cavity 2.

[0035] In some specific embodiments, the electronic device comprises a first shell 4 and a second shell 5 connected to each other, and the first shell 4 and the second shell 5 have a space therebetween, and the metal radiator 3, the first conductive cavity 1 and the second conductive cavity 2 are all arranged in the space.

[0036] When the electronic device is a notebook computer, the first shell 4 can be the C part of the notebook computer, that is, the keyboard surface, and the second shell 5 can be the D part of the notebook computer, that is, the bottom surface. There is usually a gap between the C part and the D part due to structural assembly and component avoidance, such as the reserved space of the battery 6 and the shell and the sandwiched space of the edge of the shell. If these spaces are not utilized, it will cause waste. Integrating the metal radiator 3, the first conductive cavity 1 and the second conductive cavity 2 in the space eliminates the need to separately open up additional space for the antenna (such as the large-size clearance area that needs to be opened up on the shell or the occupation of the core area around the mainboard in the conventional antenna), which can significantly reduce the occupation of the valuable layout resources inside the device, and reserve more space for other key components (such as the battery 6 and the heat dissipation module), which is especially suitable for the design of light and thin electronic devices.

[0037] In some specific embodiments, the second shell 5 is a metal part, and the first conductive cavity 1 and the second conductive cavity 2 are connected to the second shell 5 through conductive foam 7. The second shell 5 (such as the D part of the device) made of metal can serve as the "ground reference surface" of the electronic device, and the conductive foam 7 has conductivity and compressibility, which can form an electrical connection between the first conductive cavity 1, the second conductive cavity 2 and the second shell 5, and realize reliable grounding of the cavities. After grounding, the first conductive cavity 1 and the second conductive cavity 2 can quickly conduct away the internal interference charges (such as static electricity and high-frequency noise) through the metal second shell 5, avoiding the accumulation of charges to interfere with the resonance signals in the first conductive cavity 1 and the second conductive cavity 2; the grounded first conductive cavity 1 and the second conductive cavity 2 form an "equipotential body", which can effectively shield the invasion of external electromagnetic noise (such as interference signals generated by the internal mainboard and power module of the device) into the first conductive cavity 1 and the second conductive cavity 2, and ensure the stability of the high-frequency and low-frequency signal resonance in the first conductive cavity 1 and the second conductive cavity 2.

[0038] In some specific embodiments, the first shell 4 is made of plastic material, and the first window 11 and the second window 21 are arranged opposite to the first shell 4.

[0039] Traditional antennas (such as FPC antennas and PCB antennas) often need to have a large window or a clearance area on the shell to ensure that the signal radiation is not shielded by the metal shell, which will damage the integrity of the appearance of the device, such as the visual abruptness caused by the window of the D part. The electronic device provided in the embodiments embeds the metal radiator 3, the first conductive cavity 1, and the second conductive cavity 2 in the space between the two shells, and can use the structural gap of the shell itself to realize signal radiation, such as transmitting signals through the shell gap 41 or the non-metal area, reducing the modification to the appearance of the shell. For example, if the first shell 4 is made of plastic material, the signal can be directly transmitted through the first shell 4 itself. If it is made of metal material, only a narrow gap 41 needs to be provided, which has less impact on the appearance of the device than the large window design of the traditional antenna, and improves the industrial design aesthetics of the product.

[0040] In some specific embodiments, the first shell 4 is made of metal material, and the first shell 4 is provided with a gap 41, and the first window 11 and the second window 21 are arranged opposite to the gap 41. By providing the gap 41 on the metal first shell 4 and arranging the first window 11 and the second window 21 of the cavity opposite to the gap 41, a signal radiation channel can be formed, which breaks the shielding and obstruction of the signal by the metal shell and ensures that the high-frequency and low-frequency signals can be effectively radiated to the outside of the device.

[0041] In some specific embodiments, the width W of the gap 41 satisfies 2mm≤W≤3mm. mm is millimeter. The first shell 4 is made of metal material, and only a narrow gap 41 needs to be provided, and the width of the gap 41 is only 2-3mm, which can minimize the impact on the structural strength of the first shell 4 while ensuring signal radiation. Compared with the large window design of the traditional antenna, it has less impact on the appearance of the device, and improves the industrial design aesthetics of the product.

[0042] In some specific embodiments, the first conductive cavity 1 and the second conductive cavity 2 are a stepped integrated structure, the depth of the first conductive cavity 1 is greater than the depth of the second conductive cavity 2, and the area of the first window 11 is greater than the area of the second window 21. The stepped design can fit the irregular space inside the electronic device (such as the slope area between the notebook computer battery 6 and the shell), and through the high-low staggered layout of the deep cavity and the shallow cavity, the three-dimensional space can be fully utilized to avoid waste.

[0043] In some specific embodiments, the feeding point 33 is connected to the network card of the device through a cable line, and the mixed frequency signal output by the network card is transmitted to the feeding point 33 through the cable line, and then the low frequency signal and the high frequency signal are screened out by the first part 31 and the second part 32, respectively. The signal output by the network card is usually a mixed frequency signal containing low frequency (such as 2.4GHz) and high frequency (such as 5.1-7.1GHz), and if it is directly transmitted to a single radiation structure, it is easy to cause mutual interference due to frequency superposition. The embodiment can realize one-time transmission and automatic frequency division, and does not need to add an additional frequency division circuit, so as to realize the separation processing of high and low frequency signals, and ensure that the multiple frequency bands work independently and do not interfere with each other.

[0044] In some specific embodiments, the total length L1 of the stepped integrated structure is 66.8mm, the maximum height L2 is 6.8mm, and the maximum width L3 is 23.40mm. Among them, the length L1 of the first conductive cavity 1 is 41.8mm; the length L5 of the second conductive cavity 2 is 25mm, and the width L6 is 15.9mm.

[0045] It should be understood that the various forms of flow shown above can be reordered, added, or deleted steps. For example, each step described in the present disclosure can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions of the present disclosure can be achieved, and the present disclosure is not limited herein.

[0046] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0047] The above is only a specific embodiment of the present disclosure, but the protection scope of the present patent disclosure is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. An electronic device, characterized in that, include: A metal radiator (3) having a feed point (33) and comprising a first part (31) and a second part (32), wherein the first part (31) and the second part (32) exchange electrical signals with the feed point (33); The first conductive cavity (1) is provided with the first part (31) corresponding to the first conductive cavity (1). The first conductive cavity (1) includes a first window (11) which is opposite to the first part (31). The first conductive cavity (1) is used to receive the energy corresponding to the electrical signal radiated from the first part (31) to the first conductive cavity (1) and emit it from the first window (11). The second conductive cavity (2) has a different volume from the first conductive cavity (1). The second part (32) is correspondingly arranged with the second conductive cavity (2). The second conductive cavity (2) includes a second window (21) which is opposite to the second part (32). The second conductive cavity (2) is used to receive the energy corresponding to the electrical signal radiated from the second part (32) to the second conductive cavity (2) and emit it from the second window (21).

2. The electronic device according to claim 1, characterized in that, The volume of the first conductive cavity (1) is greater than the volume of the second conductive cavity (2), and the length of the first part (31) is greater than the length of the second part (32). The first conductive cavity (1) corresponds to a low-frequency signal, and the second conductive cavity (2) corresponds to a high-frequency signal.

3. The electronic device according to claim 1, characterized in that, The length of the first part (31) is 1 / 4 of the wavelength of the low-frequency signal, and the length of the second part (32) is 1 / 4 of the wavelength of the high-frequency signal.

4. The electronic device according to claim 1, characterized in that, The first part (31) radiates a low-frequency signal into the first conductive cavity (1), and the low-frequency signal resonates in the first conductive cavity (1) and is then radiated out through the first window (11); The second part (32) radiates a high-frequency signal into the second conductive cavity (2), and the high frequency resonates in the second conductive cavity (2) and is then radiated out through the second window (21).

5. The electronic device according to claim 1, characterized in that, The first part (31) and the second part (32) are located on both sides of the feed point (33) respectively, so as to guide the electrical signal energy of the corresponding frequency to the first conductive cavity (1) and the second conductive cavity (2).

6. The electronic device according to claim 1, characterized in that, The electronic device includes a first housing (4) and a second housing (5) connected to each other, with a space between the first housing (4) and the second housing (5), and the metal radiator (3), the first conductive cavity (1) and the second conductive cavity (2) are all disposed in the space.

7. The electronic device according to claim 6, characterized in that, The second housing (5) is a metal part, and the first conductive cavity (1), the second conductive cavity (2) and the second housing (5) are connected by conductive foam (7).

8. The electronic device according to claim 6, characterized in that, The first housing (4) is made of plastic, and the first window (11) and the second window (21) are both arranged opposite to the first housing (4).

9. The electronic device according to claim 6, characterized in that, The first housing (4) is made of metal and has a slit (41). The first window (11) and the second window (21) are both positioned opposite to the slit (41).

10. The electronic device according to claim 9, characterized in that, The width W of the gap (41) satisfies: 2mm≤W≤3mm.

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