Full-band antenna and mobile terminal

Abstract

The utility model provides a full-band antenna and a mobile terminal. The full-band antenna comprises a first radiation assembly, a second radiation assembly and a tuning assembly. A breakpoint is arranged between the first radiation assembly and the second radiation assembly, the first radiation assembly comprises a first radiation arm, a first feeding point and a grounding point, the second radiation assembly comprises a second radiation arm and a second feeding point, the first feeding point and the grounding point are electrically connected with the first radiation arm, and the second feeding point is electrically connected with the second radiation arm. The second feeding point is electrically connected with the second radiation arm; the tuning assembly comprises a first tuning circuit and a second tuning circuit; the first tuning circuit is electrically connected with the first feeding point through a microstrip line, and the second tuning circuit is connected with the ground. According to the full-band antenna of the utility model, through the combination of the first tuning circuit and the second tuning circuit, the whole antenna can have nearly thousand groups of reconstruction states, and full coverage of the antenna frequency band can be realized.

Description

Technical Field

[0001] The utility model relates to the field of communication technologies, and particularly to a full-band antenna and a mobile terminal. Background Art

[0002] With the continuous development of 5G base station construction, the frequency bands supported by communication terminals are also continuously expanding. Nowadays, mobile phones are common mobile terminal products for people. With the continuous development of technology, mobile phones inevitably use 5G communication technology. This requires an increase in the number of antennas in mobile phones. However, the space of mobile phones is limited, and the bandwidth of antennas is also restricted by the space. Therefore, the frequency bands covered by antennas are limited, making it difficult to achieve the bandwidth radiation of antennas.

[0003] Wireless terminal devices are constantly innovating in appearance and performance. In order to improve the customer experience and pursue a high screen-to-body ratio, high-end models and most flagship mobile phones adopt a metal frame design. The conventional break-point method cannot meet the performance requirements of operators, and the reconfigurability of metal frame antennas with ground feet is also difficult to meet the low-frequency bands.

[0004] In view of this, it is indeed necessary for the utility model to provide a full-band antenna and a mobile terminal to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a full-band antenna. Through the combination of the first tuning circuit and the second tuning circuit, the overall antenna can have nearly a thousand reconstruction states, enabling full coverage of the antenna frequency bands.

[0006] To solve the above technical problems, the utility model provides a full-band antenna, which includes a first radiation component, a second radiation component, and a tuning component. There is a break point between the first radiation component and the second radiation component. The first radiation component includes a first radiation arm, a first feeding point, and a grounding point. The second radiation component includes a second radiation arm and a second feeding point. The first feeding point and the grounding point are electrically connected to the first radiation arm, and the second feeding point is electrically connected to the second radiation arm. The tuning component includes a first tuning circuit and a second tuning circuit. The first tuning circuit is electrically connected to the first feeding point through a microstrip line, and the second tuning circuit is grounded.

[0007] As a further improvement of the utility model, the first tuning circuit includes a variable capacitor and a switch component. The variable capacitor and the switch component are electrically connected, and the value range of the variable capacitor is 0.75 pF - 8.99 pF.

[0008] As a further improvement of the present utility model, the switch assembly includes a first switch, a second switch, a third switch, a fourth switch, a first inductor, a second inductor, a third inductor, and a fourth inductor; and the first switch is in parallel with the first inductor, the second switch is in parallel with the second inductor, the third switch is in parallel with the third inductor, and the fourth switch is in parallel with the fourth inductor; after the first switch is in parallel with the variable capacitor, it is in series with the second switch, the third switch, and the fourth switch.

[0009] As a further improvement of the present utility model, a matching circuit is connected to the input port of the first tuning circuit. The matching circuit operates and controls the second tuning circuit. At this time, the variable circuit switches to the 0-ohm state, and the resonant frequency band of the full-band antenna is 900 MHz - 1200 MHz and 1710 MHz - 2200 MHz.

[0010] As a further improvement of the present utility model, the first switch and the second switch are disconnected, the third switch and the fourth switch are closed, and the first inductor and the second inductor are connected in series and then in parallel with the variable capacitor to tune the impedance of the antenna at 600 MHz - 800 MHz.

[0011] As a further improvement of the present utility model, the third switch and the fourth switch are disconnected, the first switch and the second switch are closed, the third inductor and the fourth inductor are connected in series and then in parallel with the variable capacitor. The first switch is a small inductor, and the variable capacitor is a large capacitor to tune the impedance of the antenna at 800 MHz - 960 MHz.

[0012] As a further improvement of the present utility model, the first switch, the second switch, the third switch, and the fourth switch are all disconnected. The second tuning circuit serves as a small inductor. The first inductor is connected in series with the second inductor, the third inductor, and the fourth inductor and is in parallel with the variable capacitor to adjust the impedance of the antenna at 1710 MHz - 2200 MHz.

[0013] As a further improvement of the present utility model, the first radiation component further includes a first slot, and the second radiation component further includes a second slot. The first slot and the second slot are connected.

[0014] As a further improvement of the present utility model, both the first radiation arm and the second radiation arm are configured as IFA antennas; the distance range from the end of the first slot to the first feeding point is 45 mm - 55 mm; the distance range from the end of the second slot to the second feeding point is 25 mm - 38 mm.

[0015] The purpose of the present utility model also lies in providing a mobile terminal to better apply the above full-band antenna.

[0016] To solve the above technical problems, the present utility model provides a mobile terminal, and the mobile terminal includes the aforementioned full-band antenna.

[0017] The present utility model provides a full-band antenna and a mobile terminal. The full-band antenna includes a first radiation component, a second radiation component, and a tuning component. There is a break point between the first radiation component and the second radiation component. The first radiation component includes a first radiation arm, a first feeding point, and a grounding point. The second radiation component includes a second radiation arm and a second feeding point. The first feeding point and the grounding point are electrically connected to the first radiation arm, and the second feeding point is electrically connected to the second radiation arm. The tuning component includes a first tuning circuit and a second tuning circuit. The first tuning circuit is electrically connected to the first feeding point through a microstrip line, and the second tuning circuit is grounded. Through the combination of the first tuning circuit and the second tuning circuit, the full-band antenna of the present utility model can have nearly a thousand reconstruction states, enabling full coverage of the antenna frequency band. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the full-band antenna of the present utility model.

[0019] Figure 2 It is a schematic structural diagram of the first tuning circuit in the present utility model.

[0020] Among them, the descriptions of the respective reference numerals are as follows:

[0021] First radiation component 10, first radiation arm A, first feeding point D, grounding point E, first slot g,

[0022] Second radiation component 20, second radiation arm B, second feeding point F, second slot h,

[0023] Tuning component 30, first tuning circuit 31, second tuning circuit 32, end point 40. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following further elaborates on the full-band antenna and the mobile terminal proposed by the present utility model in conjunction with the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, only for conveniently and clearly assisting in explaining the purpose of the embodiments of the present utility model. In addition, the structures shown in the accompanying drawings are often part of the actual structures. In particular, the accompanying drawings need to show different focuses and sometimes use different scales.

[0025] With the development of technology, wireless terminal devices are constantly innovating in appearance and performance. In order to improve the customer experience, mobile phone terminals pursue high frequency and high screen-to-body ratio, and most high-end models adopt metal frame designs. The conventional break point 40 method cannot meet the performance requirements of operators, and it is also difficult for the metal frame antenna with a ground connection to meet the low frequency band of 600 - 960 MHz. The all-band antenna of the present utility model can greatly improve the overall performance of the antenna.

[0026] The present utility model provides an all-band antenna, which can be applied to mobile terminals, such as commonly used mobile phone terminals, tablets, computers, and laptops.

[0027] Specifically, the all-band antenna includes a first radiation component 10, a second radiation component 20, and a tuning component 30; a break point 40 is provided between the first radiation component 10 and the second radiation component 20. The first radiation component 10 includes a first radiation arm A, a first feeding point D, and a grounding point E. The second radiation component includes a second radiation arm B and a second feeding point F. The first feeding point D and the grounding point E are electrically connected to the first radiation arm A, and the second feeding point F is electrically connected to the second radiation arm B. The tuning component 30 includes a first tuning circuit 31 and a second tuning circuit 32. The first tuning circuit 31 is electrically connected to the first feeding point D through a microstrip line, and the second tuning circuit 32 is grounded.

[0028] With such a setting, the all-band antenna of the present utility model can achieve nearly a thousand sets of reconfiguration states through the combination of the first tuning circuit 31 and the second tuning circuit 32, enabling full coverage of the antenna frequency band. In addition, setting the first tuning circuit 31 can make the first radiation component 10 form an inverted F antenna by controlling its working state, and can also greatly improve the single-hand performance of the antenna by avoiding the break point 40 position held by the hand.

[0029] Furthermore, the first tuning circuit 31 includes a variable capacitor and a switch component, the variable capacitor and the switch component are electrically connected, and the numerical range of the variable capacitor is 0.75 pF - 8.99 pF. The first tuning circuit 31 in the present utility model is configured as a Tuner circuit, and the second tuning circuit 32 is configured as a four-RF switch conversion circuit. The combination of the first tuning circuit 31 and the second tuning circuit 32 enables the entire antenna to have reconfigurability to meet the requirements of each frequency band.

[0030] The switch assembly includes a first switch, a second switch, a third switch, a fourth switch, a first inductor, a second inductor, a third inductor, and a fourth inductor; the first switch is connected in parallel with the first inductor, the second switch is connected in parallel with the second inductor, the third switch is connected in parallel with the third inductor, and the fourth switch is connected in parallel with the fourth inductor; after the first switch is connected in parallel with the variable capacitor, it is connected in series with the second switch, the third switch, and the fourth switch.

[0031] In one embodiment, a matching circuit is connected to the input port of the first tuning circuit 31. The matching circuit operates and controls the second tuning circuit 32. At this time, the variable circuit switches to the 0-ohm state, and the resonant frequency band of the full-band antenna is 900 MHz - 1200 MHz and 1710 MHz - 2200 MHz. That is to say, when the four switches in the first tuning circuit 31 are closed, the variable capacitor and the connected small inductor can be used in combination to cooperate with the second tuning circuit 32 to achieve full-frequency coverage and flexibly optimize the antenna performance of each transceiver channel.

[0032] In one embodiment, the first switch and the second switch are disconnected, the third switch and the fourth switch are closed, and the first inductor and the second inductor are connected in series and then connected in parallel with the variable capacitor to tune the impedance of the antenna at 600 MHz - 800 MHz. By connecting an inductor in parallel and a capacitor in series, an additional low-frequency resonance is pulled out to form a low-frequency W waveform. At this time, the second tuning circuit 32 does not work; the value range of the variable capacitor is 1 - 2.5 pF, and the value range of the first inductor and the second inductor connected in series is 10 - 39 nH.

[0033] In one embodiment, the third switch and the fourth switch are disconnected, the first switch and the second switch are closed, the third inductor and the fourth inductor are connected in series and then connected in parallel with the variable capacitor, the first switch is a small inductor, and the variable capacitor is a large capacitor to tune the impedance of the antenna at 800 MHz - 960 MHz. At this time, the second tuning circuit 32 does not work, and the value range of the variable capacitor is 3 - 8 pF.

[0034] In one embodiment, the first switch, the second switch, the third switch, and the fourth switch are all disconnected. The second tuning circuit 32 serves as a small inductor. The first inductor is connected in series with the second inductor, the third inductor, and the fourth inductor and then connected in parallel with the variable capacitor to adjust the impedance of the antenna at 1710 MHz - 2200 MHz. In the previous embodiment, during the low-frequency resonance debugging process, if an ideal intermediate-frequency resonance is not found, the method of connecting an inductor in parallel, a capacitor in series, and an inductor in parallel can be tried to see if there is a suitable intermediate-frequency resonance or cooperate with the inductor or capacitor in the second tuning circuit 32 to optimize the intermediate-frequency performance.

[0035] Further, the first radiation component 10 further includes a first slot g, and the second radiation component 20 further includes a second slot h, and the first slot g and the second slot h are in communication. Both the first radiation arm A and the second radiation arm B are configured as IFA antennas; the distance range from the end of the first slot g to the first feeding point D is 45 mm - 55 mm; the distance range from the end of the second slot h to the second feeding point F is 25 mm - 38 mm. That is to say, there are no other redundant antenna branches in the overall antenna. The antenna forms a loop from the feeding point to the grounding point E. By matching and optimizing, that is, parallel capacitance in series with inductance or series inductance in parallel with capacitance, and adjusting the depths of the first slot g and the second slot h to meet the performance requirements of 2300 MHz - 2700 MHz and 3300 MHz - 4200 MHz.

[0036] In summary, the present invention provides a full-band antenna and a mobile terminal. The full-band antenna includes a first radiation component 10, a second radiation component 20, and a tuning component 30; there is a break point 40 between the first radiation component 10 and the second radiation component 20. The first radiation component 10 includes a first radiation arm A, a first feeding point D, and a grounding point E. The second radiation component includes a second radiation arm B and a second feeding point F. The first feeding point D and the grounding point E are electrically connected to the first radiation arm A, and the second feeding point F is electrically connected to the second radiation arm B; the tuning component 30 includes a first tuning circuit 31 and a second tuning circuit 32; the first tuning circuit 31 is electrically connected to the first feeding point D through a microstrip line, and the second tuning circuit 32 is grounded. The full-band antenna of the present invention can enable the overall antenna to have nearly a thousand reconstruction states through the combination of the first tuning circuit 31 and the second tuning circuit 32, so as to achieve full coverage of the antenna frequency band.

[0037] It should be noted that the various embodiments in this specification are described in a progressive manner. The key point of each embodiment is to describe the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. In addition, the different parts among the various embodiments can also be combined and used with each other. The present invention does not limit this.

[0038] The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the art of the present invention according to the above disclosure are within the protection scope of the claims.

Claims

1. A full-band antenna, characterized in that: The full-band antenna comprises a first radiation component, a second radiation component and a tuning component; a breakpoint is provided between the first radiation component and the second radiation component, the first radiation component comprises a first radiation arm, a first feeding point and a grounding point, the second radiation component comprises a second radiation arm and a second feeding point, the first feeding point and the grounding point are electrically connected to the first radiation arm, and the second feeding point is electrically connected to the second radiation arm; the tuning component comprises a first tuning circuit and a second tuning circuit; The first tuning circuit is electrically connected to the first feeding point through a microstrip line, and the second tuning circuit is grounded.

2. The full-band antenna according to claim 1, characterized in that: The first tuning circuit includes a variable capacitor and a switch component, the variable capacitor and the switch component are electrically connected, and the value range of the variable capacitor is 0.75pF-8.99pF.

3. The full-band antenna according to claim 2, characterized in that: The switch component includes a first switch, a second switch, a third switch and a fourth switch, a first inductor, a second inductor, a third inductor and a fourth inductor; and the first switch is connected in parallel with the first inductor, the second switch is connected in parallel with the second inductor, the third switch is connected in parallel with the third inductor, and the fourth switch is connected in parallel with the fourth inductor; the first switch is connected in parallel with the variable capacitor and then connected in series with the second switch, the third switch and the fourth switch.

4. The full-band antenna according to claim 3, characterized in that: A matching circuit is connected to the input port of the first tuning circuit, and the matching circuit works and controls the second tuning circuit. At this time, the variable capacitor is switched to a 0 ohm state, and the resonant frequency band of the full-band antenna is 900MHz-1200MHz and 1710MHz-2200MHz.

5. The full-band antenna according to claim 4, characterized in that: The first switch and the second switch are opened, the third switch and the fourth switch are closed, the first inductor and the second inductor are connected in series and then in parallel with the variable capacitor to tune the antenna impedance at 600MHz-800MHz.

6. The full-band antenna according to claim 4, characterized in that: The third switch and the fourth switch are opened, the first switch and the second switch are closed, the third inductor and the fourth inductor are connected in series and then in parallel with the variable capacitor, the first switch is a small inductor, and the variable capacitor is a large capacitor, so as to tune the antenna impedance at 800MHz-960MHz.

7. The full-band antenna according to claim 4, characterized in that: The first switch, the second switch, the third switch and the fourth switch are all disconnected, the second tuning circuit acts as a small inductor, the first inductor is connected in series with the second inductor, the third inductor and the fourth inductor and in parallel with the variable capacitor to adjust the antenna impedance at 1710MHz-2200MHz.

8. The full-band antenna according to claim 2, characterized in that: The first radiation component further includes a first gap, and the second radiation component further includes a second gap, and the first gap is connected to the second gap.

9. The full-band antenna according to claim 8, characterized in that: The first radiating arm and the second radiating arm are both configured as IFA antennas; the distance range from the end of the first slot to the first feeding point is 45mm-55mm; the distance range from the end of the second slot to the second feeding point is 25mm-38mm.

10. A mobile terminal, characterized in that: The mobile terminal comprises the full-band antenna according to any one of claims 1-9.

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