Multi-band antenna of mobile equipment and mobile equipment

Abstract

The utility model provides a multi-band antenna of mobile equipment and the mobile equipment. The multi-band antenna comprises a dielectric substrate, and a feed end, a first radiator, a second radiator, a slot antenna and a grounding end which are arranged on the dielectric substrate, the first radiator is used for generating 2300-2500M high-frequency band resonance, one end of the first radiator is electrically connected with the feed end, and the other end of the first radiator extends in the direction away from the feed end; the second radiator is used for generating 880-960M low-frequency band resonance, one end of the second radiator is connected with the feed end, and the other end of the second radiator extends along the direction far away from the feed end, so that a certain gap is formed between the first radiator and the second radiator, the gap forms a slot antenna, and the slot antenna generates 1400-1500M resonance; the grounding end is electrically connected with the second radiator. According to the multi-band antenna of the mobile device, the size of the antenna is reduced in a small-clearance space, the working requirements of low, medium and high frequencies are met, and the antenna performance is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of communications, and in particular relates to a multi-band antenna for a mobile device and the mobile device. Background Art

[0002] In smartphones, antennas directly affect the communication capabilities of the phone, determine the transmission and reception performance of the phone, and whether high-speed data transmission can be achieved directly affects the user experience. Smartphones are usually equipped with main antennas, diversity antennas, WiFi antennas, and various mimo antennas. The main antenna and diversity antenna play a key role in improving signal quality, enhancing signal strength, and ensuring network stability. However, the full-screen and multi-camera design of smartphones has caused the antenna space to become smaller and smaller, the antenna clearance has become smaller, and the antenna frequency band needs to be increased. Therefore, it is urgent to solve how to improve antenna performance in a limited space. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings and deficiencies in the prior art, to provide a multi-band antenna for a mobile device, to reduce the size of the antenna in a space with small clearance, to meet the working requirements of low, medium and high frequencies, and to improve the antenna performance.

[0004] The utility model is realized by the following technical solutions:

[0005] A multi-band antenna for a mobile device comprises a dielectric substrate, and a feeding end, a first radiator, a second radiator, a slot antenna and a grounding end arranged on the dielectric substrate; the first radiator is used to generate a high-frequency band resonance of 2300-2500M, one end of the first radiator is electrically connected to the feeding end, and the other end extends in a direction away from the feeding end; the second radiator is used to generate a low-frequency band resonance of 880-960M, one end of the second radiator is connected to the feeding end, and the other end extends in a direction away from the feeding end, so that a certain gap is formed between the first radiator and the second radiator, the gap forms a slot antenna, and the slot antenna generates a resonance of 1400-1500M; the grounding end is electrically connected to the second radiator.

[0006] The utility model provides a multi-band antenna for a mobile device, wherein a first radiator and a second radiator respectively work in a high frequency band and a low frequency band, and a slot antenna is formed by utilizing the first radiator and the second radiator to generate a medium frequency band, thereby reducing the size of the antenna in a space with a small clearance and meeting the working requirements of low, medium and high frequencies, thereby improving the antenna performance.

[0007] Furthermore, the multi-band antenna of the mobile device also includes a tuning switch circuit for being electrically connected to the signal source output circuit, the tuning switch circuit being electrically connected to the ground terminal, and being used to generate a 1710-2170M intermediate frequency band resonance and a 2300-2500M high frequency band resonance. The antenna radiation frequency is adjusted by using the tuning switch circuit, and on the basis of satisfying the 2300-2500M high frequency band resonance, the 880-960M low frequency band resonance, and the 1400-1500M intermediate frequency band resonance, an additional 1710-2170M low frequency intermediate frequency band resonance and a 2300-2500M high frequency band resonance are generated, thereby reducing the antenna volume in a limited space while achieving coverage of multiple frequency bands.

[0008] Furthermore, the length of the slot antenna is 1 / 4-1 / 2 of the working wavelength.

[0009] Furthermore, the first radiator and the second radiator form a long strip-shaped gap, and the long strip-shaped gap forms a slot antenna.

[0010] Further, the first radiator includes a first bent branch and a first extending branch, one end of the first bent branch is connected to the feeding end, the other end of the first bent branch is connected to the first extending branch, and the first extending branch extends in a direction away from the feeding end; the second radiator includes a second connecting branch, a second bent branch and a second extending branch connected in sequence; one end of the second connecting branch is connected to the feeding end and the grounding end, the other end of the second connecting branch extends in a direction away from the feeding end, and its end is connected to the second bent branch; a certain angle is formed between the second bent branch and the second connecting branch; the second extending branch extends from the end of the second bent branch, and forms a first gap with the second connecting branch, and forms a second gap with the first extending branch, and the first gap and the second gap form the slot antenna.

[0011] Furthermore, the first gap has the same width as the second gap. The widths of the first gap and the second gap are controlled to be the same, so that the power of the formed slot antenna is stable.

[0012] The utility model also provides a mobile device, comprising a shell, a middle frame, a mainboard and the above-mentioned multi-band antenna; the middle frame is fixed in the shell, and the mainboard is fixed to the middle frame; a signal source output circuit is arranged on the mainboard, and the tuning switch circuit is arranged on the mainboard and connected to the signal source output circuit; the dielectric substrate is arranged in the shell, and the feeding end, the first radiator, the second radiator, the slot antenna and the grounding end are arranged on the dielectric substrate; the feeding end is electrically connected to the signal source output circuit; the tuning switch circuit is arranged on the mainboard and connected to the signal source output circuit, and the grounding end is electrically connected to the tuning switch circuit.

[0013] Furthermore, an antenna bracket is arranged on the main board, and the dielectric substrate is arranged on the antenna bracket.

[0014] Further, the mainboard is arranged on one side of the middle frame, and the dielectric substrate is arranged on a side of the middle frame away from the mainboard; or, the mainboard is arranged on one side of the middle frame, and the dielectric substrate is arranged on a side surface of the middle frame.

[0015] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the multi-band antenna of the mobile device of Example 1.

[0017] Figure 2 It is an S11 parameter diagram of the multi-frequency antenna of the mobile device of Example 1.

[0018] Figure 3 3 is an antenna efficiency diagram of the multi-frequency antenna of the mobile device of Example 1. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the embodiments of the utility model in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the embodiments of the utility model, rather than to limit the embodiments of the utility model. It should also be noted that, for ease of description, only parts related to the embodiments of the utility model are shown in the accompanying drawings, rather than all structures.

[0020] In addition, the terms first, second, third, etc. in the specification and claims are only used for the purpose of describing the same technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, nor necessarily describing the order or time sequence. The terms are interchangeable where appropriate. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0021] Similarly, the terms "fixed" and "connected" used in the specification and claims should not be construed as limited to direct connection. Therefore, the expression "device A is connected to device B" should not be limited to a device or system in which device A is directly connected to device B, but means that there is a path between device A and device B, which may be a path including other devices or tools.

[0022] Example 1

[0023] This embodiment provides a multi-band antenna for a mobile device. Figure 1 This is a schematic diagram of the structure of a multi-band antenna for a mobile device. Figure 1 The multi-band antenna of the mobile device includes a dielectric substrate 1, and a feeding end 2, a first radiator 3, a second radiator 4, a slot antenna 55 and a grounding end 6 arranged on the dielectric substrate 1; the first radiator 3 is used to generate a high-frequency band resonance of 2300-2500M, one end of the first radiator 3 is electrically connected to the feeding end 2, and the other end extends in a direction away from the feeding end 2; the second radiator 4 is used to generate a low-frequency band resonance of 880-960M, one end of the second radiator 4 is connected to the feeding end 2, and the other end extends in a direction away from the feeding end 2, so that a certain gap is formed between the first radiator 3 and the second radiator 4, and the gap forms a slot antenna 55, and the slot antenna 55 generates a resonance of 1400-1500M; the grounding end 6 is electrically connected to the second radiator 4.

[0024] In the multi-band antenna of the mobile device provided in this embodiment, the first radiator 3 and the second radiator 4 work in the high frequency band and the low frequency band respectively. The first radiator 3 and the second radiator 4 are used to form a slot antenna 55 to generate a medium frequency band, thereby reducing the size of the antenna in a space with smaller clearance and meeting the working requirements of low, medium and high frequencies, thereby improving the antenna performance.

[0025] In this embodiment, the feeding terminal 2, the first radiator 3, the second radiator 4, the slot antenna 55 and the ground terminal 6 are arranged on the dielectric substrate 1 by LDS, PDS, spraying, LAP, etc. The dielectric substrate 1 can be an FPC board.

[0026] In this embodiment, the multi-band antenna of the mobile device further includes a tuning switch circuit for being electrically connected to the signal source output circuit, the tuning switch circuit being electrically connected to the ground terminal 6, and being used to generate a 700-890M intermediate frequency band resonance and a 2300-2500M high frequency band resonance. The antenna radiation frequency is adjusted by using the tuning switch circuit, and on the basis of satisfying the 2300-2500M high frequency band resonance, the 880-960M low frequency band resonance and the 1400-1500M intermediate frequency band resonance, an additional 1710-2170M intermediate frequency band resonance and a 2300-2500M high frequency band resonance are generated, thereby reducing the antenna volume in a limited space while achieving coverage of multiple frequency bands.

[0027] In this embodiment, the length of the slot antenna 55 is 1 / 4-1 / 2 of the working wavelength.

[0028] In this embodiment, the total length of the first radiator 3 is 1 / 4-1 / 2 of the working wavelength; the total length of the second radiator 4 is 1 / 4-1 / 2 of the working wavelength.

[0029] In this embodiment, the first radiator 3 and the second radiator 4 form a long strip-shaped gap, and the long strip-shaped gap forms a slot antenna 55 .

[0030] In this embodiment, the first radiator 3 includes a first bent branch 31 and a first extending branch 32, one end of the first bent branch 31 is connected to the feeding end, the other end of the first bent branch 31 is connected to the first extending branch 32, and the first extending branch 32 extends in a direction away from the feeding end; the second radiator 4 includes a second connecting branch 41, a second bent branch 42, and a second extending branch 43 connected in sequence; one end of the second connecting branch 41 is connected to the feeding end and the grounding end, the other end of the second connecting branch 41 extends in a direction away from the feeding end, and its end is connected to the second bent branch 42; a certain angle is formed between the second bent branch 42 and the second connecting branch 41; the second extending branch 43 extends from the end of the second bent branch 42, and forms a first gap 51 with the second connecting branch 41, and forms a second gap 52 with the first extending branch 32, and the first gap 51 and the second gap 52 form a slot antenna 55. Utilizing the first radiator 3 and the second radiator 4 to form a slot antenna 55 is beneficial for achieving multi-band resonance while saving the number of antennas; at the same time, the first radiator 3 and the second radiator 4 form an inverted F-shaped antenna, and the bending structure of the first radiator 3 and the second radiator 4 is beneficial for reducing the volume of the entire multi-band antenna and improving space utilization.

[0031] The slot antenna 55 formed by the first gap 51 and the second gap 52 may be linear or bent or curved. In one embodiment, in order to reduce the volume of the first radiator and the second radiator, the first extension branch 32 is bent or curved, and the second extension branch 43 is bent or curved, thereby forming a bent or curved slot antenna 55.

[0032] In this embodiment, the width of the first gap 51 is the same as that of the second gap 52. The width of the first gap 51 and the second gap 52 is controlled to be the same, so that the power of the slot antenna 55 formed is stable.

[0033] Figure 2 is the S11 parameter diagram of the multi-band antenna for mobile devices, please refer to Figure 2 The return loss of the 880M-960M low frequency band generated by the second radiator is (-4.0)dB~(-4.9)dB, the return loss of the 1400M-1500M intermediate frequency band generated by the slot antenna is (-6)dB~(-3)dB, the antenna efficiency of the 1710M-2170M intermediate frequency band adjusted by the tuning switch circuit is (-3)dB~(-5)dB, the return loss of the 2300M-2500M high frequency band adjusted by the tuning switch circuit is (-4.5)dB~(-4.9)dB, and the return loss of the 2500-2700M high frequency band generated by the first radiator is (-8)dB~(-9)dB.

[0034] Figure 3 is a graph of antenna efficiency for multi-band antennas in mobile devices, see Figure 3 The antenna efficiency of the 880M-960M low frequency band generated by the second radiator is -9.8dB, the antenna efficiency of the 1400M-1500M intermediate frequency band generated by the slot antenna is -9.2dB, the antenna efficiency of the 1710M-2170M intermediate frequency band generated by the tuning switch circuit is -8dB, the antenna efficiency of the 2300M-2500M high frequency band generated by the tuning switch circuit is -7.5dB, and the antenna efficiency of the 2500M-2700M high frequency band generated by the first radiator is -6dB.

[0035] Example 2

[0036] This embodiment provides a mobile device, including a housing, a middle frame, a mainboard and the multi-band antenna of Embodiment 1; the middle frame is fixed in the housing, and the mainboard is fixed to the middle frame; a signal source output circuit is provided on the mainboard;

[0037] The dielectric substrate 1 is arranged in the shell, and the feeding end 2, the first radiator 3, the second radiator 4, the slot antenna 55 and the grounding end 6 are arranged on the dielectric substrate 1; the feeding end 2 is electrically connected to the signal source output circuit; the tuning switch circuit is arranged on the main board and connected to the signal source output circuit, and the grounding end 6 is electrically connected to the tuning switch circuit.

[0038] In the mobile device provided in this embodiment, the resonance of high frequency, medium frequency and low frequency bands is achieved through the first radiator 3, the second radiator 4 and the slot antenna 55, and the radiation frequency band is increased by using a tuning switch circuit, so that the multi-band antenna can realize the reception of the mobile device on multiple frequency bands within the limited clearance of the mobile device.

[0039] In this embodiment, the mainboard is arranged on one side of the middle frame, and the dielectric substrate 1 is arranged on the side of the middle frame away from the mainboard; or, the mainboard is arranged on one side of the middle frame, and the dielectric substrate 1 is arranged on the side of the middle frame. In the limited clearance of the mobile device, the multi-band antenna of embodiment 1 is arranged on the side of the middle frame away from the mainboard or on the side of the middle frame, so that resonance of each frequency band can be achieved.

[0040] In another embodiment, an antenna bracket is disposed on the mainboard, and the dielectric substrate 1 is disposed on the antenna bracket.

[0041] The present invention is not limited to the above-mentioned embodiments. If various changes or modifications to the present invention do not depart from the spirit and scope of the present invention, and if these changes and modifications fall within the claims of the present invention and the scope of equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A multi-band antenna for a mobile device, characterized in that: It comprises a dielectric substrate, and a feeding end, a first radiator, a second radiator, a slot antenna and a ground end which are arranged on the dielectric substrate; The first radiator is used to generate resonance in the high frequency band of 2300-2500M, one end of the first radiator is electrically connected to the feeding end, and the other end extends in a direction away from the feeding end; The second radiator is used to generate a low-frequency band resonance of 880-960M, one end of the second radiator is connected to the feeding end, and the other end extends in a direction away from the feeding end, so that a certain gap is formed between the first radiator and the second radiator, and the gap forms a slot antenna, and the slot antenna generates a resonance of 1400-1500M; The ground end is electrically connected to the second radiator.

2. The multi-band antenna for mobile device according to claim 1, characterized in that: It also includes a tuning switch circuit electrically connected to the signal source output circuit, the tuning switch circuit is electrically connected to the ground terminal, and is used to generate a medium frequency band resonance of 1710-2170M and a high frequency band resonance of 2300-2500M.

3. The multi-band antenna for a mobile device according to claim 1, characterized in that: The length of the slot antenna is 1 / 4-1 / 2 of the working wavelength.

4. The multi-band antenna for mobile device according to claim 3, characterized in that: The first radiator and the second radiator form a long strip-shaped gap, and the long strip-shaped gap forms a slot antenna.

5. The multi-band antenna for mobile device according to claim 4, characterized in that: The first radiator comprises a first bent branch and a first extending branch, one end of the first bent branch is connected to the feeding end, the other end of the first bent branch is connected to the first extending branch, and the first extending branch extends in a direction away from the feeding end; The second radiator comprises a second connecting branch, a second bending branch and a second extending branch which are connected in sequence; One end of the second connecting branch is connected to the feeding end and the grounding end, the other end of the second connecting branch extends in a direction away from the feeding end, and its end is connected to the second bent branch; a certain angle is formed between the second bent branch and the second connecting branch; the second extending branch extends from the end of the second bent branch, and forms a first gap with the second connecting branch, and forms a second gap with the first extending branch, and the first gap and the second gap form the slot antenna.

6. The multi-band antenna for mobile device according to claim 5, characterized in that: The first gap has the same width as the second gap.

7. A mobile device, characterized in that: The invention comprises a shell, a middle frame, a main board and the multi-band antenna according to any one of claims 2 to 6; the middle frame is fixed in the shell, and the main board is fixed in the middle frame; a signal source output circuit is arranged on the main board; the dielectric substrate is arranged in the shell, and the feed end, the first radiator, the second radiator, the slot antenna and the ground end are arranged on the dielectric substrate; The feeding end is electrically connected to the signal source output circuit; the tuning switch circuit is arranged on the main board and connected to the signal source output circuit, and the grounding end is electrically connected to the tuning switch circuit.

8. The mobile device according to claim 7, characterized in that: An antenna bracket is arranged on the main board, and the dielectric substrate is arranged on the antenna bracket.

9. The mobile device according to claim 7, characterized in that: The mainboard is arranged on one side of the middle frame, and the dielectric substrate is arranged on one side of the middle frame away from the mainboard; Alternatively, the mainboard is arranged on one side of the middle frame, and the dielectric substrate is arranged on a side surface of the middle frame.

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