Tunable antenna system applicable to multiple frequency bands and corresponding electronic equipment

Abstract

The present invention relates to a tunable antenna system applicable to multiple frequency bands, which comprises an antenna module, a tuning switch module and a tuning circuit module. The antenna module is provided with multiple antennas, each of which is provided with a feeding end, a grounding end and at least one spring pin. The feeding end is connected to a mainboard to feed a current signal. The tuning circuit module is connected to the antenna module through a tuning switch module. The capacitance of the capacitor component and the inductance of the inductor module are both variable, and each antenna is correspondingly provided with a group of capacitors and inductors. The spring pin is electrically connected to the corresponding inductor component and capacitor component, and the capacitor component and the inductor component are arranged in parallel or in series so that the frequency received by the antenna module can be tuned to change the frequency, so that each antenna or a combination of multiple antennas can match a wider frequency, thereby improving the compatibility of the device, having a simple structure and low cost.

Description

Technical Field

[0001] The present invention relates to the field of antenna equipment, and in particular to a tunable antenna system applicable to multiple frequency bands and corresponding electronic equipment. Background Art

[0002] With the rapid development of wireless communication technology, mobile phone models have evolved from 2G to 3G and then to 4G. The number of antenna frequency bands has increased, and the requirements for multi-frequency antennas have become increasingly high. The demand for small-volume, multi-band antennas has also become increasingly strong. In order to expand the bandwidth of antennas and improve antenna performance, some solutions in the existing technology achieve adjustable antenna frequency by designing complex circuit structures, which is difficult to implement and has high costs.

[0003] Therefore, it is necessary to provide a tunable antenna system applicable to multiple frequency bands to solve the above problems. Summary of the invention

[0004] The present invention relates to a tunable antenna system applicable to multiple frequency bands. The tunable antenna system applicable to multiple frequency bands is configured by arranging multiple antennas, and a tuning circuit module is configured by connecting with an antenna module through a tuning switch module. The tuning circuit module includes a capacitor component and an inductor component. The capacitance of the capacitor component and the inductance of the inductor module are both variable, and each antenna is correspondingly configured with a group of capacitors and inductors. The elastic pin is electrically connected to the corresponding inductor component and capacitor component. The capacitor component and the inductor component are arranged in parallel or in series so that the frequency received by the antenna module can be tunable and the frequency can be changed, so that each antenna or a combination of multiple antennas can match a wider frequency, improve the compatibility of the device and realize the adjustable antenna communication frequency. The structure is simple and the cost is low, which solves the problem of difficulty and high cost in the prior art due to the design of a complex circuit structure to realize the adjustable antenna frequency.

[0005] To solve the above problems, the present invention provides a tunable antenna system suitable for multiple frequency bands, comprising:

[0006] An antenna module, the antenna module is used to be connected to the mainboard to feed a current signal; the antenna module is provided with a plurality of antennas, each of the antennas is provided with a feeding end, a grounding end and at least one elastic foot, and the feeding end is connected to the mainboard;

[0007] a tuning switch module, the tuning switch module being electrically connected to the ground terminal of the corresponding antenna; and

[0008] A tuning circuit module, wherein the tuning circuit module is connected to the antenna module through the tuning switch module; the tuning circuit module includes a capacitor component and an inductor component, and the capacitance of the capacitor component and the inductance of the inductor module are both variable; the elastic foot is electrically connected to the corresponding inductor component and the capacitor component, and the capacitor component and the inductor component are arranged in parallel or in series so that the frequency received by the antenna module can be tuned to change the frequency.

[0009] Furthermore, the antenna module includes a first antenna, the capacitor component includes a first capacitor, and the inductor component includes a first inductor. The first antenna is connected in series with the first capacitor and the first inductor, the first capacitor is set to 4.7pF±0.2pF, and the first inductor is set to 5.6±0.1nH. The operating frequency of the first antenna is 1900-2200Mhz, which can meet the use of China Unicom WCDMA Band1 and China Mobile Unicom LTE BAND1.

[0010] Further, the antenna module includes a second antenna, the capacitor component includes a second capacitor, and the inductor component includes a second inductor. The second antenna is connected in series with the second capacitor and the second inductor, the second capacitor is set to 2.2pF±0.2pF, and the second inductor is set to 15±1nH. The operating frequency of the second antenna is 2300Mhz-2700Mhz. It can meet the use of mobile LTE BAND40 and BAND41 bands.

[0011] Further, the tuning switch module includes a copper wire, and the first antenna, the first capacitor, the first inductor, the second antenna, the second capacitor, and the second inductor are connected in series through the copper wire. The working frequency of the first antenna and the second antenna used in combination is 880Mhz-960Mhz, which can meet the use of China Unicom Mobile GSM900, China Unicom WCDMA BAND8, and China Mobile LTE BAND8 frequency bands. Alternatively, the tuning switch module includes a power supply and a control pin. The power supply is electrically connected to the control pin, and the control pin is used to receive tuning information and generate a switch control signal according to the tuning information to control the first antenna, the first capacitor, the first inductor, the second antenna, the second capacitor, and the second inductor to be connected in series. The working frequency of the first antenna and the second antenna used in combination is 700Mhz-890Mhz, which can meet the use of mobile broadcasting NR and N28 frequency bands, the base station coverage is small, the application scenarios are currently small, and the full use of telecom 2G, 3G, and 4G.

[0012] Furthermore, an automatic control component is preset in the tuning switch module, and the automatic control component controls the on or off of the path between the first antenna and the second antenna based on the logic set in the Modem code and the tuning information, thereby improving work efficiency and being more convenient to use.

[0013] Furthermore, the antenna module also includes a third antenna, the capacitor component also includes a third capacitor, and the inductor component also includes a third inductor. The third antenna is connected in parallel with the third capacitor and the third inductor. The third capacitor is set to 2pF±0.2pF, and the third inductor is set to 3.9±0.1nH. The operating frequency of the third antenna is 3300Mhz-4200Mhz, which can meet the use of China Unicom Telecom NR and N78 frequency bands. Alternatively, the capacitor component also includes a fourth capacitor, and the inductor component also includes a fourth inductor. The third antenna is connected in series with the second antenna through the fourth capacitor and the fourth inductor. The operating frequency of the second antenna and the third antenna used in conjunction is 1800Mhz-1900Mhz, which can meet the reception use of China Unicom Mobile GSM+80 frequency band and China Unicom Mobile Telecom LTE BAND3 frequency band.

[0014] Further, the antenna module also includes a fourth antenna, the capacitor component also includes a fifth capacitor, and the inductor component also includes a fifth inductor. The fourth antenna is connected in parallel with the fifth capacitor and the fifth inductor; the fifth capacitor is set to 2.7pF±0.2pF, and the fifth inductor is set to 3.9±0.1nH. The operating frequency of the fourth antenna is 4500Mhz-5000Mhz, which can meet the use of mobile NR and N79 frequency bands, and the main operation covers the use of large stadium concerts, such as the Bird's Nest and other places. Alternatively, the capacitor component also includes a sixth capacitor, and the inductor component also includes a sixth inductor. The fourth antenna, the sixth capacitor, the sixth inductor, and the first antenna are connected in series. The sixth capacitor is set to 2pF±0.2pF, and the sixth inductor is set to 3.9±0.1nH. The operating frequency of the first antenna used in conjunction with the fourth antenna is 1700Mhz-1800Mhz, which can meet the use of China Unicom Mobile GSM1800 transmission and China Unicom Mobile Telecom LTEBAND3 transmission.

[0015] Furthermore, the tuning circuit module also includes a bandpass filter or a bandstop filter, and the bandpass filter or the bandstop filter is electrically connected to the capacitor component and the inductor component, which can achieve the effects of filtering and frequency band selection.

[0016] Furthermore, when the capacitor component and the inductor component are arranged in series, the bandpass filter is electrically connected to the capacitor component and the inductor component, thereby realizing an ultra-low frequency, and can also filter the adjacent low frequency. This band can meet the recent frequency band requirements of some countries in Central and North America and the requirements of the domestic mobile certification N28 band. When the capacitor component and the inductor component are arranged in parallel, the bandstop filter is electrically connected to the capacitor component and the inductor component, which can block high-frequency signals and pass medium and low-frequency signals, achieving the effect of filtering and frequency band selection.

[0017] Furthermore, the antenna device is also provided with electronic components, which are used to connect to an external mobile terminal, thereby effectively reducing the influence of the electronic components on the antenna, improving the performance of the antenna, and also facilitating the improvement of the performance of the electronic components themselves.

[0018] The present invention also provides an electronic device using any one of the above multi-band tunable antenna systems.

[0019] Since the present invention adopts the above-mentioned tunable antenna system applicable to multiple frequency bands, compared with the prior art, its beneficial effects are as follows: The present invention relates to a tunable antenna system applicable to multiple frequency bands, and the tunable antenna system applicable to multiple frequency bands includes an antenna module, a tuning switch module and a tuning circuit module. The antenna module is used to connect to the mainboard to feed the current signal. The antenna module is provided with multiple antennas, each antenna is provided with a feeding end, a grounding end and at least one spring foot, and the feeding end is connected to the mainboard. The tuning switch module is electrically connected to the grounding end of the corresponding antenna. The tuning circuit module is connected to the antenna module through the tuning switch module. The tuning circuit module includes a capacitor component and an inductor component, and the capacitance of the capacitor component and the inductance of the inductor module can be variably set, and each antenna is correspondingly provided with a group of capacitors and inductors. The spring pin is electrically connected to the corresponding inductor component and capacitor component. The capacitor component and the inductor component are arranged in parallel or in series to make the frequency received by the antenna module adjustable and change the frequency, so that each antenna or multiple antenna combinations can match a wider frequency, thereby improving the compatibility of the equipment and realizing the adjustable antenna communication frequency. The structure is simple and the cost is low, which solves the problem of difficulty and high cost in the prior art due to the design of complex circuit structure to achieve the adjustable antenna frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the present invention.

[0021] Figure 1It is a structural schematic diagram of an embodiment of a tunable antenna system applicable to multiple frequency bands of the present invention.

[0022] In the figure: 10, a tunable antenna system suitable for multiple frequency bands; 21, a first antenna; 22, a second antenna; 23, a third antenna; 24, a fourth antenna; 25, a feeding terminal; 26, a ground terminal; 27, a spring foot; 31, a first capacitor; 32, a second capacitor; 33, a third capacitor; 34, a fourth capacitor; 35, a fifth capacitor; 36, a sixth capacitor; 41, a first inductor; 42, a second inductor; 43, a third inductor; 44, a fourth inductor; 45, a fifth inductor; 46, a sixth inductor; 51, a copper wire; 52, an SP2T switch; 53, a band-pass filter; 54, a band-stop filter. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0024] The directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left",

[0025] The words such as “right”, “inside”, “outside”, “side”, “top” and “bottom” are only used for reference to the directions of the drawings. The directional terms used are used to illustrate and understand the present invention rather than to limit the present invention.

[0026] In the figures, structurally similar elements are denoted by the same reference numerals.

[0027] Please refer to Figure 1 In this embodiment, the tunable antenna system 10 applicable to multiple frequency bands includes an antenna module, a tuning switch module and a tuning circuit module. The antenna module is used to connect to the mainboard to feed the current signal. The tuning switch module is electrically connected to the ground terminal 26 of the corresponding antenna. The tuning circuit module is connected to the antenna module through the tuning switch module.

[0028] The antenna module is provided with multiple antennas, each antenna is provided with a feed terminal 25, a ground terminal 26 and at least one spring foot 27, and the feed terminal 25 is connected to the mainboard. The tuning circuit module includes a capacitor component and an inductor component. The capacitance of the capacitor component and the inductance of the inductor module are both variable. The spring foot 27 is electrically connected to the corresponding inductor component and capacitor component, and the capacitor component and the inductor component are arranged in parallel or in series so that the frequency received by the antenna module can be tuned to change the frequency.

[0029] According to the antenna radiation principle, changing the capacitance between the antenna trace and the antenna reference ground can affect the antenna's resonant frequency. The capacitance and inductance corresponding to different antennas can be set variable, which can improve the antenna's compatibility, so that the antenna can match the communication requirements of a wider frequency band.

[0030] Specifically, in the first working state, the antenna module includes a first antenna 21, the capacitor component includes a first capacitor 31, and the inductor component includes a first inductor 41. The first antenna 21 is connected in series with the first capacitor 31 and the first inductor 41, the first capacitor 31 is set to 4.7pF±0.2pF, and the first inductor 41 is set to 5.6±0.1nH. Among them, the value of the first capacitor 31 is 4.7pF, and its error range is limited to ±0.2pF. The first inductor 41 is set to 5.6nH, and its error range is limited to ±0.1nH.

[0031] Due to the limitation of the quarter-wavelength law, the environmental size of the first antenna 21 area is designed to be 310mm*230mm, and the first antenna 21 itself has a height requirement (maintaining a certain distance from the main body of the machine motherboard to achieve the effect of clear air radiation, because the passive hardware unit such as the first antenna 21 requires a better amplification environment), so the design height is 4mm, and the operating frequency of the first antenna 21 is 1900-2200Mhz. The single antenna mode of the first antenna 21 can only meet the use of the domestic Unicom WCDMA Band 1 frequency band and the China Mobile Unicom LTE BAND 1 frequency band.

[0032] In the second working state, the antenna module includes a second antenna 22, the capacitor component includes a second capacitor 32, and the inductor component includes a second inductor 42. The second antenna 22 is connected in series with the second capacitor 32 and the second inductor 42, the second capacitor 32 is set to 2.2pF±0.2pF, and the second inductor 42 is set to 15±1nH, so that the operating frequency of the second antenna 22 is 2300Mhz-2700Mhz. Among them, the value of the second capacitor 32 is 2.2pF, and its error range is limited to ±0.2pF. The second inductor 42 is set to 15nH, and its error range is limited to ±1nH.

[0033] The frequency band of the second antenna 22 corresponding to the location of the mainboard is a conventional 4G high-frequency band, so the area occupied by the second antenna 22 is relatively small, and the required size is approximately 210mm*130m, but due to the requirements of the environment of the second antenna 22, the height of the required antenna environment is still set to 4mm. The single antenna mode of the second antenna 22 can meet the use of the mobile LTE BAND40 and BAND41 frequency bands.

[0034] Of course, the first antenna 21 and the second antenna 22 can work in combination to achieve an operating frequency of 880Mhz-960Mhz. The principle is that the first antenna 21 is connected to the corresponding matching pad through the spring pin 27 through the matching and other tuning motherboards. For example, the low frequency is a combination of series inductance (5.6NH) + series capacitance (4.7PF), which can make the antenna resonant state relatively good. This is the key frequency band involved in domestic GSM calls and LTE mobile Unicom. Moreover, after the two antennas are connected, the size of the antennas is added together, and the corresponding wavelength becomes longer, realizing the resonance of the medium frequency antenna.

[0035] The combination of the first antenna 21 and the second antenna 22 can be set in the following two ways, each of which corresponds to a working state.

[0036] In the third working state, the tuning switch module includes a copper wire 51, and the first antenna 21, the first capacitor 31, the first inductor 41, the second antenna 22, the second capacitor 32, and the second inductor 42 are connected in series through the copper wire 51. Among them, the length of the copper wire 51 can be set to 5cm, and the aperture of the copper wire 51 can be set to 0.15mm. The working frequency of the first antenna 21 and the second antenna 22 is 880Mhz-960Mhz, which can meet the use of China Unicom Mobile GSM900, China Unicom WCDMA BAND8, and China Mobile LTE BAND8 frequency bands.

[0037] In the fourth working state, the tuning switch module includes a power supply and a control pin. The power supply is electrically connected to the control pin, and the control pin is used to receive tuning information and generate a switch control signal according to the tuning information to control the first antenna 21, the first capacitor 31, the first inductor 41, the second antenna 22, the second capacitor 32, and the second inductor 42 to be connected in series. The working frequency of the first antenna 21 and the second antenna 22 is 700Mhz-890Mhz, which can meet the use of mobile broadcasting NR and N28 frequency bands, with few base station coverage, few application scenarios, and the comprehensive use of telecom 2G, 3G, and 4G.

[0038] An automatic control component may be preset in the tuning switch module, and the automatic control component controls the on or off of the path between the first antenna 21 and the second antenna 22 based on the logic and tuning information set in the Modem code, thereby improving work efficiency and making it more convenient to use.

[0039] Specifically, the first antenna 21 is connected to the second antenna 22 corresponding to another set of tunable matching pads through the SP2T switch 52. The switch operation is controlled by the power supply and the control pin. The logic is configured in the modem code, and then it actually operates according to the corresponding required frequency band. Like the 700Mhz-890Mhz band required by the user, the signal line is connected in series with a specific intermediate frequency bandpass device to block the high-frequency signal and pass the medium and low frequency signals, which has the effect of filtering and frequency band selection. A series inductor (15NH) + a series capacitor (2.2PF) can be used to achieve ultra-low frequency, because this combination can also form a filtering effect on the adjacent low frequency. This band can meet the recent frequency band requirements of some countries in Central and North America and the requirements of the domestic mobile certification N28 band.

[0040] In the fifth working state, the antenna module also includes a third antenna 23, and the area corresponding to the third antenna 23 is 120mm*85mm and the height is 4mm. The capacitor component also includes a third capacitor 33, and the inductor component also includes a third inductor 43. The third antenna 23 is connected in parallel with the third capacitor 33 and the third inductor 43 to change the frequency of the third antenna 23. The third capacitor 33 is set to 2pF±0.2pF, and the third inductor 43 is set to 3.9±0.1nH. Among them, the value of the third capacitor 33 is 2pF, and its error range is limited to ±0.2pF. The third inductor 43 is set to 3.9nH, and its error range is limited to ±0.1nH. The operating frequency of the third antenna 23 is 3300Mhz-4200Mhz, which can meet the use of China Unicom Telecom NR and N78 frequency bands.

[0041] In the sixth working state, the third antenna 23 and the second antenna 22 can work in combination. The capacitor component also includes a fourth capacitor 34, and the inductor component also includes a fourth inductor 44. The third antenna 23 and the second antenna 22 are connected in series through the fourth capacitor 34 and the fourth inductor 44. The fourth capacitor 34 is set to 2pF±0.2pF, and the fourth inductor 44 is set to 3.9±0.1nH. Among them, the value of the fourth capacitor 34 is 2pF, and its error range is limited to ±0.2pF. The fourth inductor 44 is set to 3.9nH, and its error range is limited to ±0.1nH. The working frequency of the second antenna 22 and the third antenna 23 used in combination is 1800Mhz-1900Mhz, which can meet the reception of China Unicom Mobile GSM+80 band and China Unicom Mobile Telecom LTE BAND3 band.

[0042] In the seventh working state, the antenna module also includes a fourth antenna 24, and the corresponding size of the fourth antenna 24 is 4mm*2mm and 4mm high. The capacitor component also includes a fifth capacitor 35, and the inductor component also includes a fifth inductor 45. The fourth antenna 24 is connected in parallel with the fifth capacitor 35 and the fifth inductor 45. The fifth capacitor 35 is set to 2.7pF±0.2pF, and the fifth inductor 45 is set to 3.9±0.1nH. Among them, the value of the fifth capacitor 35 is 2.7pF, and its error range is limited to ±0.2pF. The fifth inductor 45 is set to 3.9nH, and its error range is limited to ±0.1nH. The operating frequency of the fourth antenna 24 is 4500Mhz-5000Mhz, which can meet the use of mobile NR and N79 frequency bands, as well as the main operation coverage of large stadium concerts, such as the Bird's Nest and other places.

[0043] In the eighth working state, the capacitor component also includes a sixth capacitor 36, and the inductor component also includes a sixth inductor 46. The fourth antenna 24, the sixth capacitor 36, the sixth inductor 46, and the first antenna 21 are connected in series. The sixth capacitor 36 is set to 2pF±0.2pF, and the sixth inductor 46 is set to 3.9±0.1nH. Among them, the value of the sixth capacitor 36 is 2pF, and its error range is limited to ±0.2pF. The sixth inductor 46 is set to 3.9nH, and its error range is limited to ±0.1nH. The working frequency of the first antenna 21 and the fourth antenna 24 is 1700Mhz-1800Mhz, which can meet the transmission use of China Unicom Mobile GSM1800 and China Unicom Mobile Telecom LTEBAND3.

[0044] In this embodiment, the tuning circuit module further includes a bandpass filter 53 or a bandstop filter 54. The bandpass filter 53 or the bandstop filter 54 is electrically connected to the capacitor component and the inductor component, and can achieve filtering and frequency band selection effects.

[0045] Specifically, when the capacitor component and the inductor component are arranged in series, the bandpass filter 53 is electrically connected to the capacitor component and the inductor component, so as to achieve ultra-low frequency, and can also filter the adjacent low frequency. This band can meet the recent frequency band requirements of some countries in North America and Central America and the requirements of the domestic mobile certification N28 band. When the capacitor component and the inductor component are arranged in parallel, the bandstop filter 54 is electrically connected to the capacitor component and the inductor component, which can block high-frequency signals and pass medium and low-frequency signals, achieving the effect of filtering and frequency band selection.

[0046] In this embodiment, the antenna device is also provided with electronic components, which are used to connect to an external mobile terminal, thereby effectively reducing the impact of the electronic components on the antenna, improving the antenna performance, and also facilitating the improvement of the performance of the electronic components themselves.

[0047] The present invention also provides an electronic device using the above-mentioned tunable antenna system applicable to multiple frequency bands. The specific working principle of the electronic device is the same as or similar to the working principle of the above-mentioned tunable antenna system applicable to multiple frequency bands. For details, please refer to the relevant description in the specific embodiment of the above-mentioned tunable antenna system applicable to multiple frequency bands.

[0048] In this embodiment, the present invention relates to a tunable antenna system suitable for multiple frequency bands, and the tunable antenna system suitable for multiple frequency bands includes an antenna module, a tuning switch module and a tuning circuit module. The antenna module is used to connect to the mainboard to feed the current signal. The antenna module is provided with multiple antennas, each antenna is provided with a feeding end, a grounding end and at least one spring foot, and the feeding end is connected to the mainboard. The tuning switch module is electrically connected to the grounding end of the corresponding antenna. The tuning circuit module is connected to the antenna module through the tuning switch module. The tuning circuit module includes a capacitor component and an inductor component, and the capacitance of the capacitor component and the inductance of the inductor module can be variably set, and each antenna is correspondingly provided with a group of capacitors and inductors. The spring pin is electrically connected to the corresponding inductor component and capacitor component. The capacitor component and the inductor component are arranged in parallel or in series to make the frequency received by the antenna module adjustable and change the frequency, so that each antenna or multiple antenna combinations can match a wider frequency, thereby improving the compatibility of the equipment and realizing the adjustable antenna communication frequency. The structure is simple and the cost is low, which solves the problem of difficulty and high cost in the prior art due to the design of complex circuit structure to achieve the adjustable antenna frequency.

[0049] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A tunable antenna system suitable for multiple frequency bands, characterized in that: include: An antenna module, the antenna module is used to be connected to the mainboard to feed a current signal; The antenna module is provided with a plurality of antennas, each of which is provided with a feeding end, a grounding end and at least one elastic foot, and the feeding end is connected to the mainboard; a tuning switch module, the tuning switch module being electrically connected to the ground terminal of the corresponding antenna; and A tuning circuit module, wherein the tuning circuit module is connected to the antenna module through the tuning switch module; the tuning circuit module includes a capacitor component and an inductor component, and the capacitance of the capacitor component and the inductance of the inductor component are both variable; the elastic foot is electrically connected to the corresponding inductor component and the capacitor component, and the capacitor component and the inductor component are connected in parallel or in series so that the frequency received by the antenna module can be tuned to change the frequency; The antenna module includes a first antenna, the capacitor component includes a first capacitor, and the inductor component includes a first inductor; the first antenna is connected in series with the first capacitor and the first inductor; The antenna module includes a second antenna, the capacitor component includes a second capacitor, and the inductor component includes a second inductor; the second antenna is connected in series with the second capacitor and the second inductor; When the antenna system is in a first working state, the first antenna operates at an operating frequency of 1900Mhz-2200Mhz; When the antenna system is in the second working state, the second antenna operates at an operating frequency of 2300Mhz-2700Mhz; When the antenna system is in a third working state, the first antenna, the first capacitor, the first inductor, the second antenna, the second capacitor, and the second inductor are connected in series through a copper wire, and the first antenna and the second antenna are used in conjunction at an operating frequency of 880Mhz-960Mhz; wherein the tuning switch module includes the copper wire; When the antenna system is in a fourth working state, the first antenna, the first capacitor, the first inductor, the second antenna, the second capacitor, and the second inductor are directly connected in series, and the first antenna and the second antenna are used together at an operating frequency of 700Mhz-890Mhz; wherein the tuning switch module includes a power supply and a control pin, the power supply is electrically connected to the control pin, the control pin is used to receive tuning information, and generate a switch control signal according to the tuning information to control the first antenna, the first capacitor, the first inductor, the second antenna, the second capacitor, and the second inductor to be connected in series; wherein an automatic control component is preset in the tuning switch module, and the automatic control component controls the conduction or disconnection of the path between the first antenna and the second antenna based on the set logic in the Modem code and the tuning information; The length of the copper wire is 5cm, the aperture is 0.15mm, the environmental size of the first antenna is designed to be 310mm*230mm, the first capacitor is set to 4.7 pF ± 0.2 pF, and the first inductor is set to 5.6 nH±0.1nH. The environmental size of the second antenna is set to 210mm*130m, the second capacitor is set to 2.2 pF ± 0.2 pF, and the second inductor is set to 15 nH±1nH.

2. The tunable antenna system applicable to multiple frequency bands according to claim 1, characterized in that: The antenna module further includes a third antenna, the capacitor component further includes a third capacitor, and the inductor component further includes a third inductor; the third antenna is connected in parallel with the third capacitor and the third inductor; the third capacitor is set to 2 pF ± 0.2 pF, and the third inductor is set to 3.9 ± 0.1 nH; Alternatively, the capacitor component further includes a fourth capacitor, and the inductor component further includes a fourth inductor; the third antenna and the second antenna are connected in series via the fourth capacitor and the fourth inductor.

3. The tunable antenna system applicable to multiple frequency bands according to claim 1, characterized in that: The antenna module further includes a fourth antenna, the capacitor component further includes a fifth capacitor, and the inductor component further includes a fifth inductor; the fourth antenna is connected in parallel with the fifth capacitor and the fifth inductor; the fifth capacitor is set to 2.7pF±0.2pF, and the fifth inductor is set to 3.9±0.1nH; Alternatively, the capacitor component also includes a sixth capacitor, and the inductor component also includes a sixth inductor; the fourth antenna, the sixth capacitor, the sixth inductor, and the first antenna are connected in series; the sixth capacitor is set to 2 pF ± 0.2pF, and the sixth inductor is set to 3.9±0.1nH.

4. The tunable antenna system applicable to multiple frequency bands according to claim 1, characterized in that: The tuning circuit module further includes a bandpass filter or a bandstop filter, and the bandpass filter or the bandstop filter is electrically connected to the capacitor component and the inductor component.

5. The tunable antenna system applicable to multiple frequency bands according to claim 4, characterized in that: When the capacitor component and the inductor component are arranged in series, the bandpass filter is electrically connected to the capacitor component and the inductor component; when the capacitor component and the inductor component are arranged in parallel, the bandstop filter is electrically connected to the capacitor component and the inductor component.

6. An electronic device using the tunable antenna system applicable to multiple frequency bands according to any one of claims 1 to 5.

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