Composite antenna and mobile terminal equipment
By designing a composite antenna, the low-frequency bands for trunking and public network communication are integrated into an external antenna, solving the problems of large antenna space occupation and poor aesthetics in the case of limited space, and improving the wireless performance and aesthetics of mobile terminal devices.
Patent Information
- Application Number
- CN202520489857.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-03-19
AI Technical Summary
To meet the need for simultaneous coverage of trunking communication and public network communication within a limited space, traditional external antennas occupy the space of internal antennas, affecting overall wireless performance and being aesthetically unappealing.
Design a composite antenna with an external antenna structure consisting of a helical section and a stub section. Integrate low-frequency bands for trunking and public network communication. The helical section and stub section are located inside the housing, and stability is improved by injection molding.
This technology improves the overall performance and aesthetics of the antenna without increasing the size of the external antenna, expands the internal antenna space of the mobile terminal device, and enhances wireless performance.
Smart Images
Figure CN223884626U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to wireless communication technical field, concretely relates to a compound antenna and mobile terminal equipment. BACKGROUND
[0002] With the rapid development of various communication technologies, a terminal contains two communication modes of group communication and public network communication, and the frequency band range to be covered also increases accordingly, which is a rigid demand for some special users. How to make a high-performance antenna that can cover the two communication modes in limited space is a meaningful topic.
[0003] The traditional group antenna adopts an external antenna, and the public network antenna is generally an internal antenna. For portable devices with limited space, if the two communication modes are to be covered simultaneously, the antenna needs to occupy more structural space. In the case of limited space, the external antenna occupies part of the internal antenna space, making it difficult to debug the public network antenna and affecting the overall wireless performance. If the traditional external antenna wants to cover the entire low-frequency full band, it generally adopts a PCB antenna form, which occupies a large space and is not aesthetically pleasing.
[0004] The above information disclosed in the background is only used to increase the understanding of the background of the present application, and therefore, it can include prior art known to those skilled in the art. SUMMARY
[0005] In view of the problem of large volume and unattractive appearance of the group antenna and public network antenna of the group communication and public network communication compound device proposed in the background, the utility model provides a compound antenna and mobile terminal equipment, which realizes the sharing of group communication and public network communication antennas, reduces the occupied space, and improves the appearance and performance.
[0006] To achieve the above-mentioned utility model purposes, the utility model adopts the following technical solutions:
[0007] A compound antenna, which is an external antenna, includes a spiral part and a stub part.
[0008] The spiral part is a spiral conductor with a length in the axial direction.
[0009] The stub part is a straight conductor parallel to the axis of the spiral part, one end of which is flush with one end of the spiral part and electrically connected thereto.
[0010] In some specific embodiments, the spiral part is a cylindrical shape with equal spiral diameter and equal pitch; the spiral diameter ranges from 8 to 10 mm; the pitch ranges from 6 to 8 mm; and the length of the spiral part ranges from 80 to 90 mm.
[0011] In some specific embodiments, the length of the branch section ranges from 45 to 55 mm.
[0012] In some specific embodiments, the vertical distance from the branch section to the spiral section ranges from 1 to 3 mm.
[0013] In some specific embodiments, the shell is further included; the spiral section and the branch section are located in the shell together.
[0014] In some specific embodiments, the first SMA joint is further included, which is electrically connected to one end of the spiral section and the branch section.
[0015] In some specific embodiments, the shell is made of plastic material, and is integrally formed with the spiral section, the branch section and the first SMA joint by injection molding.
[0016] In some specific embodiments, the shell is a circular truncated cone, including a large end and a small end; one end of the spiral section and the branch section flush with each other is located in the large end; the other end of the spiral section is located in the small end.
[0017] In some specific embodiments, the spiral section and the branch section are rigid conductors.
[0018] A mobile terminal device includes a circuit board and the composite antenna.
[0019] The circuit board is connected with the composite antenna, and is used for feeding the composite antenna; the axis of the spiral section and the branch section are located on the plane where the circuit board is located.
[0020] The composite antenna integrates the most difficult low-frequency band to debug in the group antenna and the public network in an external antenna, does not increase the size of the external antenna, makes the antenna overall size small, light in weight, simple in structure, high in performance, easy to adjust, can be applied to various mobile communication devices, and expands the applicability. The low-frequency is placed on the external antenna, the efficiency is improved by about 2dB than the built-in antenna, the internal antenna space of the mobile terminal device is more spacious, the internal antenna space of the mobile terminal device is greatly improved, and the overall wireless performance of the device is greatly improved.
[0021] Other features and advantages of the present application will become more apparent after reading the specific embodiments of the present application in combination with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0023] Figure 1 Structure diagram according to the embodiment;
[0024] Figure 2 Internal structure and connection with the circuit board according to the embodiment;
[0025] Figure 3 Passive standing wave simulation diagram of the composite antenna according to the embodiment;
[0026] Figure 4a Cluster frequency pattern of the composite antenna according to the embodiment;
[0027] Figure 4b Public network N28 frequency pattern of the composite antenna according to the embodiment;
[0028] Figure 4c Public network B8 frequency pattern of the composite antenna according to the embodiment;
[0029] Figure 5a Cluster frequency current distribution diagram of the composite antenna according to the embodiment;
[0030] Figure 5b Public network N28 frequency current distribution diagram of the composite antenna according to the embodiment;
[0031] Figure 5c Public network B8 frequency current distribution diagram of the composite antenna according to the embodiment.
[0032] Reference signs,
[0033] 1, spiral part; 2, branch part; 3, shell; 31, large end; 32, small end; 4, first SMA joint; 5, circuit board. DETAILED DESCRIPTION
[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0035] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0036] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0039] The disclosure below provides many different embodiments or examples for implementing various implementations of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific examples of processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.
[0040] Referring to Figure 1 , Figure 2 The utility model discloses a composite antenna, it is external antenna, including spiral part 1, branch part 2.
[0041] Spiral part 1 is the conductor of spiral shape with the length of its axial direction, branch part 2 is the straight conductor arranged in parallel with the axis of spiral part 1, straight is the shape with linear length, such as cylinder shape or cuboid shape or rectangular plate structure etc., one end of branch part 2 is flush with one end of spiral part 1 and is electrically connected with it.
[0042] Spiral part 1 has the advantages of wide frequency band, high gain, circular polarization, omnidirectional coverage etc., adjusts its parameter setting its basic operating frequency and optimization performance, combines the parasitic effect of branch part 2 to increase the operating bandwidth of composite antenna, realizes the integration of trunking communication and public network communication low frequency N28 / LTE B5 / LTE B8 in one antenna.
[0043] That is, the self-resonance of spiral part 1 forms the standing wave of trunking part, meets the requirement of trunking antenna operating frequency 350MHz~425MHz, the 2 times frequency part of the standing wave formed by the self-resonance of spiral part 1 is located at about 800MHz, combines the parasitic effect of branch part 2 to meet the bandwidth requirement of public network low frequency required frequency band 700MHz-960MHz.
[0044] The utility model also discloses a mobile terminal equipment, including circuit board 5 and above-mentioned composite antenna, circuit board 5 is connected with composite antenna, is used for feeding composite antenna, and composite antenna is the wireless signal transmission and reception of circuit board 5. The axis of spiral part 1, branch part 2 is located on the plane of circuit board 5.
[0045] The utility model discloses a composite antenna integrates the most difficult low frequency band in debugging of trunking communication and public network communication in one external antenna, does not increase the size of external antenna, makes the antenna overall size small, light in weight, simple structure, high performance, easily adjust, can be applied to a variety of mobile communication class's equipment, expands its applicability. The low frequency is placed on the external composite antenna, and the efficiency is improved about 2dB than the built-in antenna, so that the internal antenna space of mobile terminal equipment is more spacious, greatly improves the internal antenna space of mobile terminal equipment, makes its overall wireless performance greatly improve.
[0046] The specific structure and principle of the composite antenna and the mobile terminal device of the utility model will be described in detail through specific embodiments.
[0047] In some specific embodiments, with reference to Figure 1 、 Figure 2 , the spiral part 1 of the composite antenna is cylindrical with equal spiral diameter and equal pitch; and the spiral diameter ranges from 8 to 10 mm; the pitch ranges from 6 to 8 mm; and the length of the spiral part 1 ranges from 80 to 90 mm.
[0048] The length of the composite antenna of the embodiment is within 100 mm, which has a smaller length.
[0049] The embodiment of the mobile terminal device includes the composite antenna of each of the above embodiments, which shortens the overall length of the mobile terminal device.
[0050] In some specific embodiments, with reference to Figure 1 、 Figure 2 , the length of the branch part 2 of the composite antenna ranges from 45 to 55 mm.
[0051] The embodiment of the mobile terminal device includes the composite antenna of each of the above embodiments.
[0052] In some specific embodiments, with reference to Figure 1 、 Figure 2 , the vertical distance from the branch part 2 to the spiral part 1 of the composite antenna ranges from 1 to 3 mm. That is, the vertical distance from the branch part 2 to the nearest spiral line is 1 to 3 mm.
[0053] The composite antenna of the embodiment has a smaller width.
[0054] The embodiment of the mobile terminal device includes the composite antenna of each of the above embodiments, which has a smaller overall width.
[0055] In a specific embodiment, with reference to Figure 1 、 Figure 2The spiral diameter of the spiral part 1 of the composite antenna is 9 mm, and the pitch is 7 mm; the rising height of the spiral part 1 is 88 mm, that is, the length of the spiral part 1 is 88 mm; the length of the branch part 2 is 50 mm; the vertical distance between the outer side line of the spiral part 1 and the branch part 2 is 2 mm.
[0056] The length of the composite antenna of the embodiment is not more than 100 mm, and the width is not more than 15 mm; passive standing wave simulation is performed to obtain a simulation diagram Figure 3 ; by Figure 3 It can be seen that the composite antenna can completely cover the frequency range in the working mode of the trunking communication and the public network low frequency, and the S11 in the range of 345 MHz-435 MHz and 690 MHz-1150 MHz can reach below-5 dB.
[0057] The antenna pattern and current distribution diagram of the trunking and public network part are referred to Figure 4a 、 Figure 4b 、 Figure 4c 、 5a , 5b, 5c; through the current distribution diagram, the working state of each part of the composite antenna at each frequency point can be well viewed; through the simulation result of the pattern diagram, it can be seen that in the working frequency range, the directivity and gain performance of the antenna are good.
[0058] The embodiment of the mobile terminal device includes the composite antenna of the above-mentioned embodiments.
[0059] In some specific embodiments, with reference to Figure 1 、 Figure 2 , the composite antenna further includes a shell 3; the spiral part 1 and the branch part 2 are located in the shell 3 together.
[0060] The embodiment of the mobile terminal device includes the composite antenna of each of the above-mentioned embodiments.
[0061] In some specific embodiments, with reference to Figure 1 、 Figure 2 , the composite antenna further includes a first SMA joint 4, which is electrically connected to one end of the spiral part 1 and the branch part 2.
[0062] The embodiment of the mobile terminal device includes the composite antenna, the circuit board 5 and the second SMA joint of each of the above-mentioned embodiments; the circuit board 5 is electrically connected to and fixedly connected to the second SMA joint; the circuit board 5 is connected to the composite antenna through the connection of the first SMA joint 4 and the second SMA joint.
[0063] In some specific embodiments, with reference to Figure 1 、 Figure 2 , the shell 3 is made of plastic material, and is integrally formed with the spiral part 1, the branch part 2 and the first SMA joint 4 by injection molding.
[0064] The composite antenna of the embodiment increases its strength, improves its stability and life by one-piece injection molding.
[0065] The embodiment of the mobile terminal device includes the composite antenna of each of the above embodiments, and improves the stability and life of the communication of the mobile terminal device by the higher strength of the composite antenna.
[0066] In some specific embodiments, with reference to Figure 1 , Figure 2 , the shell 3 of the composite antenna is in the shape of a circular truncated cone, including a large end 31 and a small end 32; the end of the spiral part 1 flush with the branch part 2 is located in the large end 31; the other end of the spiral part 1 is located in the small end 32.
[0067] The embodiment of the mobile terminal device includes the composite antenna of each of the above embodiments.
[0068] In some specific embodiments, with reference to Figure 1 , Figure 2 , the spiral part 1 and the branch part 2 of the composite antenna are rigid conductors; the end of the spiral part 1 flush with the branch part 2 is fixedly connected.
[0069] The embodiment of the mobile terminal device includes the composite antenna of each of the above embodiments.
[0070] In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.
[0071] The above is only a specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A composite antenna, characterized by, The external antenna comprises: a spiral part, which is a spiral conductor with a length in axial direction; a branch part, which is a straight conductor parallel to the axis of the spiral part, one end of which is flush with one end of the spiral part and electrically connected thereto.
2. The composite antenna according to claim 1, wherein The spiral part is a cylindrical shape with equal spiral diameter and equal pitch; the spiral diameter ranges from 8 to 10 mm; the pitch ranges from 6 to 8 mm; the length of the spiral part ranges from 80 to 90 mm.
3. The composite antenna according to claim 2, wherein, The length of the branch part ranges from 45 to 55 mm.
4. The composite antenna according to claim 3, wherein The vertical distance from the branch part to the spiral part ranges from 1 to 3 mm.
5. The composite antenna according to any one of claims 1 to 4, characterized in that, Further comprising a shell; the spiral part and the branch part are located in the shell together.
6. The composite antenna according to claim 5, wherein, Further comprising a first SMA joint, which is electrically connected to one end of the spiral part and the branch part.
7. The composite antenna according to claim 6, wherein The shell is made of plastic material, and is integrally formed with the spiral part, the branch part and the first SMA joint by injection molding.
8. The composite antenna according to claim 7, wherein, The shell is a circular truncated cone shape, comprising a large end and a small end; one end of the spiral part and the branch part flush with each other is located in the large end; the other end of the spiral part is located in the small end.
9. The composite antenna according to claim 5, wherein, The spiral part and the branch part are rigid conductors.
10. A mobile terminal device, characterized by The circuit board and the composite antenna according to any one of claims 1 to 9 are connected, and the circuit board is used to feed power to the composite antenna; the axis of the spiral part and the branch part are located on the plane where the circuit board is located. The circuit board and the composite antenna according to any one of claims 1 to 9 are connected, and the circuit board is used to feed power to the composite antenna; the axis of the spiral part and the branch part are located on the plane where the circuit board is located.