Multi-frequency single-line shark fin antenna and antenna wire harness integration device thereof

Abstract

The utility model provides a multi-frequency single-line shark fin antenna and an antenna wire harness integration device thereof. The antenna circuit board of the multi-frequency single-line shark fin antenna is provided with a plurality of connection positions, and each connection position is provided with an antenna unit. The antenna unit comprises at least two of an LTE antenna plate, an AM / FM / DAB antenna plate and a GNSS ceramic antenna; an antenna circuit board opening is connected with a wire outlet fastener; the coaxial output cables are electrically connected with the antenna units one by one; a single coaxial output cable of the shark fin antenna passes through the wire outlet fastener and is input into the antenna wire harness integration device; and the antenna harness integration device divides the multi-frequency antenna signal into a plurality of paths of antenna signals and outputs the antenna signals to a client terminal. According to the utility model, the original multi-line output multi-path signal is changed into the multi-frequency single-line shark fin antenna which outputs the signal after being shunted by the wire harness integrator, so that the problem that a multi-frequency amplification circuit needs to use a larger space is solved; the problems that the number of used antenna coaxial cables and connectors is large, and the cost is high are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle antennas, in particular to a multi-frequency single-wire shark fin antenna and an antenna harness integration device thereof. Background Art

[0002] As a new type of vehicle-mounted antenna technology, shark fin antenna technology has gradually become an important part of the vehicle-mounted field. With the advancement of technology, shark fin antennas can not only receive AM (Amplitude Modulation), FM (Frequency Modulation), GNSS (Global Navigation Satellite Systems), GSM (Global System for Mobile Communication) and other signals, but also be compatible with more automotive electronic functions. This integrated design is usually implemented in the form of a multi-frequency and multi-line shark fin antenna. However, see Figure 1 and Figure 2 , the existing multi-frequency and multi-line shark fin antennas still have major drawbacks in the application of vehicle-mounted communication modules: First, in terms of volume, the traditional shark fin antenna circuit requires a large space to achieve coverage of multiple frequency bands, and the antenna circuit board occupies a relatively large space. Second, in terms of cost, the traditional shark fin antenna circuit is complicated, the electronic materials are more expensive, and multiple signal output lines and adapters are required to connect to the vehicle-mounted antenna module, which is costly. Third, there is mutual interference between cables; the wiring harness is thick, and the subsequent wiring and installation are relatively complicated and have low reliability.

[0003] Therefore, developing a multi-frequency single-wire shark fin antenna that saves space and is easy to install and maintain is a technical problem that needs to be solved urgently. Utility Model Content

[0004] Due to the above-mentioned defects in the prior art, the utility model provides a multi-frequency single-wire shark fin antenna and an antenna harness integration device thereof, which changes the original multi-wire output multi-channel signal into a multi-frequency single-wire shark fin antenna output signal after branching through a harness integrator, thereby optimizing the problem that the multi-frequency amplification circuit requires a large space; solving the problem of the large number of antenna coaxial cables and connectors and the high cost; and at the same time, solving the problem of the complicated and cumbersome installation process of multiple coaxial cables of the shark fin antenna.

[0005] To achieve the above object, in a first aspect, the present utility model provides a multi-frequency single-wire shark fin antenna, which includes a housing. The housing includes a base and a shark fin cover body connected to the edge of one side of the base. An antenna circuit board is arranged inside the housing. It is characterized in that a plurality of connection positions are arranged on the antenna circuit board, and one type of antenna unit is arranged on each connection position. The antenna unit includes at least two of an LTE antenna board, an AM / FM / DAB antenna board, and a GNSS ceramic antenna. The antenna circuit board is provided with an opening to connect to an outlet fastener. The coaxial output cable is electrically connected to the antenna unit one by one. The single coaxial output cable of the shark fin antenna is input into an antenna harness integration device through the outlet fastener. The antenna harness integration device divides the multi-frequency antenna signal into several paths of antenna signals and outputs them to a customer terminal.

[0006] Further, the antenna unit includes three antenna units: an LTE antenna board, an AM / FM / DAB antenna board, and a GNSS ceramic antenna. The LTE antenna board is arranged vertically with respect to the antenna circuit board in the longitudinal direction, the AM / FM / DAB antenna board is arranged vertically with respect to the antenna circuit board in the transverse direction, and the GNSS ceramic antenna is arranged parallel to the antenna circuit board in the transverse direction.

[0007] Further, the circuit design of the antenna circuit board is as follows: The GNSS input signal passes through a first matching circuit, a first amplification circuit, a second matching circuit, a filter, and a third matching circuit and then outputs after entering a combining network; the AM, FM, and DAB input signals enter the combining network through a second amplification circuit and then output; the LTE input signal enters the combining network through a fourth matching circuit and then outputs.

[0008] Further, the connection position includes a conductive contact, an insulating protection sleeve, and a connecting portion. The insulating protection sleeve is circular, the conductive contact is needle-shaped and is arranged along the central axis direction of the insulating protection sleeve, and the connecting portion includes a limiting strip and / or a limiting groove.

[0009] In a second aspect, the present utility model provides an antenna harness integration device, which is characterized in that it is adapted to the above multi-frequency single-wire shark fin antenna. The antenna harness integration device includes a multi-frequency signal input part, a coupling circuit, a plurality of filters, a low-noise amplifier, and a plurality of signal output connectors that are electrically connected in sequence. The multi-frequency signal input part is electrically connected to the coaxial output cable of the multi-frequency single-wire shark fin antenna through a male-female connector and a data cable. The antenna harness integration device is connected to a customer terminal through a plurality of the signal output connectors.

[0010] Further, the LTE signal is directly output, while the GNSS, AM / FM, and DAB signals are frequency-divided through a coupling circuit, and then output as four-way GNSS, AM, FM, and DAB signals after being filtered by a filter and compensated by a low-noise amplifier.

[0011] Further, the harness integration device is independently arranged between the multi-frequency single-wire shark fin antenna and the customer terminal.

[0012] Further, the harness integration device is integrated inside the customer terminal.

[0013] Compared with the prior art, the present utility model has the following advantages or beneficial effects:

[0014] (1) In the shark fin antenna of the present utility model, multiple antenna signals (such as GNSS antenna, LTE antenna, AM antenna, FM antenna, DAB antenna signals) are output through a single coaxial cable, reducing the number of harnesses and connectors, significantly reducing costs, improving manufacturing and assembly efficiency, and at the same time, the single-wire design also optimizes the use space of the shark fin antenna circuit.

[0015] (2) The harness integration device of the present utility model can divide the single-wire input signal of the shark fin into multiple signals for output. The required signals can be divided and output near the terminal, or can be arranged inside the terminal, with flexible installation.

[0016] (3) The present utility model outputs the combined signal through a single coaxial cable and then divides the required signals through the harness integration device to the customer terminal, reducing the risk of multi-harness interference during signal transmission. Description of the Drawings

[0017] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, the present utility model and its features, shape, and advantages will become more obvious. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, and the emphasis is on showing the gist of the present utility model.

[0018] Figure 1 It is a schematic diagram of a traditional multi-frequency multi-wire shark fin antenna and its working connection method;

[0019] Figure 2 It is a schematic diagram of the antenna circuit of a traditional multi-frequency multi-wire shark fin antenna;

[0020] Figure 3 It is a schematic diagram of a multi-frequency single-wire shark fin antenna and its working connection method in an embodiment of the present utility model;

[0021] Figure 4 It is an exploded schematic diagram of the internal structure of a multi-frequency single-wire shark fin antenna in an embodiment of the present utility model;

[0022] Figure 5 Schematic diagram of the antenna circuit of the multi - frequency single - wire shark fin antenna in an embodiment of the present utility model;

[0023] Figure 6 Circuit diagram of the antenna harness integration device in an embodiment of the present utility model;

[0024] Among them, 10. Multi - frequency multi - wire shark fin antenna; 100. Housing; 101. LTE antenna board; 102. AM / FM / DAB antenna board; 103. GNSS ceramic antenna; 104. Antenna circuit board; 105. Outlet fastener; 106. Coaxial output cable; 107. Male - female connector; 108. Data line; 11. Multi - frequency single - wire shark fin antenna; 110. First matching circuit; 111. First amplifier circuit; 112. Second matching circuit; 113. Filter; 114. Third matching circuit; 115. Combiner network; 116. Second amplifier circuit; 117. Fourth matching circuit; 20. Adapter cable; 21. Antenna harness integration device; 201. Coupling circuit; 3. Customer terminal; 210. Signal output connector. Detailed implementation manners

[0025] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. It should be understood that all these described exemplary embodiments are only partial embodiments and examples of the present utility model, rather than all. On the contrary, these exemplary embodiments are provided so that those skilled in the art can more thoroughly understand the present disclosure and can more completely convey the technical content of the present disclosure to those skilled in the art.

[0026] All kinds of antenna boards and the like involved in the following embodiments and examples are commercially available. In the following detailed description, many specific details are set forth to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that well - known electronic devices or circuit configurations (such as matching circuits, coupling circuits, filters, low - noise amplifiers, combiner networks, etc.) are not described in detail and shown to avoid obscuring the gist of the present invention.

[0027] Comparative example

[0028] See Figure 1 , the traditional multi - frequency multi - wire shark fin antenna 10 outputs signals through four coaxial cables, and the antenna is connected to the customer terminal through four adapter cables 20. The overall harness and the number of connectors are large, the cost is high, it is difficult to install multiple harnesses in vehicle assembly, and there is interference between cables. See Figure 2, the AM, FM, and DAB (Digital Audio Broadcasting) input signals of the multi - frequency and multi - line shark fin antenna respectively pass through three filters, and the three - way signals then successively pass through an amplifier circuit, a filter, and a matching circuit, and the signals are output (DC power supply input). The GNSS input signal passes through another set of matching circuits, an amplifier circuit, an output matching circuit, a filter, and a matching circuit, and finally the signal is output (DC power supply input). The LTE input signal is output after passing through another matching circuit.

[0029] It can be seen that the traditional multi - frequency and multi - line shark fin antenna has the following problems:

[0030] 1. The antenna circuit is redundant, there are many electronic components, and the cost increases;

[0031] 2. There are many wire harnesses and connectors, and there is mutual interference between the cables.

[0032] 3. The wire harness is thick, and it is difficult to assemble and wire in the vehicle yard.

[0033] Embodiment

[0034] Referring to Figures 3 to 5 , this embodiment provides a multi - frequency and single - line shark fin antenna, which includes a housing 100. The housing 100 includes a base (not directly shown in the figure) and a shark fin cover body connected to the edge of the base on one side of the base. The base and the shark fin cover body are exemplarily connected by dispensing glue in the base card slot and using a thermal riveting process for the positioning posts on the shark fin cover body to connect the base and the shark fin cover body. An antenna circuit board 104 is arranged inside the housing 100. A number of connection positions are arranged on the antenna circuit board 104, and one type of antenna unit is arranged on each connection position.

[0035] The antenna unit includes at least two of an LTE antenna board 101, an AM / FM / DAB antenna board 102, and a GNSS ceramic antenna 103 to realize the acquisition of multi - band signals. As a specific example, the connection position includes a conductive contact, an insulating protection sleeve, and a connection part. The insulating protection sleeve is circular, the conductive contact is needle - shaped and is arranged along the central axis direction of the insulating protection sleeve, and the connection part includes a limiting strip and / or a limiting groove. The specific connection method between the antenna unit and the connection position is exemplified by arranging a card slot and a pad on the antenna circuit board 104, arranging corresponding pads on the antenna unit, and connecting the circuit board and the antenna unit by soldering the pads. The antenna circuit board 104 is opened with holes to connect to an outlet fastener 105; the coaxial output cable 106 is electrically connected to each antenna unit one by one; the single coaxial output cable 106 of the shark fin antenna passes through the outlet fastener 105 and is input to the antenna harness integration device 21; the antenna harness integration device 21 divides the multi - frequency antenna signals into several paths of antenna signals and outputs them to the customer terminal 3. A common customer terminal 3 is a vehicle - mounted antenna receiving module.

[0036] As a specific example, refer to Figure 4 , the antenna unit includes three antenna units: an LTE antenna board 101, an AM / FM / DAB antenna board 102, and a GNSS ceramic antenna 103; the LTE antenna board 101 is vertically arranged with respect to the antenna circuit board 104, the AM / FM / DAB antenna board 102 is horizontally arranged with respect to the antenna circuit board 104, and the GNSS ceramic antenna 103 is horizontally arranged parallel to the antenna circuit board 104.

[0037] The multi-band single-wire shark fin antenna 11 outputs the combined signal only through one coaxial output cable 106. The antenna output end is connected to the input end of the antenna harness integration device 21 through a male-female connector 107 and a data line 108. The antenna harness integration device 21 is connected to the customer terminal through four connectors, finally completing the transmission process of the signal from the antenna to the customer terminal.

[0038] Refer to Figure 5 , the circuit design of the antenna circuit board 104 is as follows: the GNSS input signal passes through the first matching circuit 110, the first amplifier circuit 111, the second matching circuit 112, the filter 113, and the third matching circuit 114 and then enters the combined network 115 for output; the AM, FM, DAB input signals enter the combined network 115 through the second amplifier circuit 116 for output; the LTE input signal enters the combined network 115 through the fourth matching circuit 117 for output.

[0039] This embodiment also provides an antenna harness integration device used in cooperation with the above multi-band single-wire shark fin antenna. Refer to Figure 3 and Figure 6 , the antenna harness integration device 21 includes a multi-band signal input part, a coupling circuit 201, several filters, a low-noise amplifier, and several signal output connectors 210 that are electrically connected in sequence; the multi-band signal input part is electrically connected to the coaxial output cable 106 of the multi-band single-wire shark fin antenna 11 through a male-female connector 107 and a data line 108; the antenna harness integration device 21 is connected to the customer terminal 3 through several signal output connectors 210.

[0040] More specifically, when the antenna unit includes three antenna units: an LTE antenna board 101, an AM / FM / DAB antenna board 102, and a GNSS ceramic antenna 103, the LTE signal in the multi-band signal is directly output, and the GNSS, AM / FM, DAB signals are frequency-divided through the coupling circuit, and then output four-way GNSS, AM, FM, DAB signals after being filtered by the filter and compensated by the low-noise amplifier.

[0041] The installation position of the wire harness integration device is flexible and can be independently set between the multi-frequency single-wire shark fin antenna 11 and the customer terminal 3. Optionally, the wire harness integration device can also be integrated inside the customer terminal 3.

[0042] In the shark fin antenna of this embodiment, multiple antenna signals (such as GNSS antenna, LTE antenna, AM antenna, FM antenna, DAB antenna signals) are output by a single coaxial cable, reducing the number of wire harnesses and connectors, significantly reducing costs, improving manufacturing and assembly efficiency, and at the same time, the single-wire design also optimizes the use space of the shark fin antenna circuit.

[0043] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and the equipment and structures not described in detail should be understood to be implemented in a common manner in the art; any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes, without departing from the scope of the technical solution of the present invention, which does not affect the essence of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of the protection of the technical solution of the present invention.

Claims

1. A multi-frequency single-wire shark fin antenna, comprising a housing (100), the housing (100) comprising a base and a shark fin cover connected to an edge of the base by one side of the base; an antenna circuit board (104) is arranged inside the housing (100); characterized in that: The antenna circuit board (104) is provided with a plurality of connection positions, each of which is provided with an antenna unit; the antenna unit comprises at least two of an LTE antenna board (101), an AM / FM / DAB antenna board (102), and a GNSS ceramic antenna (103); the antenna circuit board (104) has a hole connected to a wire outlet fastener (105); a coaxial output cable (106) is electrically connected to the antenna units one by one; a single coaxial output cable (106) of the shark fin antenna passes through the wire outlet fastener (105) and is input into an antenna harness integrated device (21); the antenna harness integrated device (21) divides a multi-frequency antenna signal into a plurality of antenna signals and outputs them to a client terminal (3).

2. The multi-frequency single-wire shark fin antenna according to claim 1, characterized in that: The antenna unit comprises three antenna units, namely an LTE antenna board (101), an AM / FM / DAB antenna board (102), and a GNSS ceramic antenna (103); the LTE antenna board (101) is arranged vertically and perpendicularly to the antenna circuit board (104); the AM / FM / DAB antenna board (102) is arranged horizontally and perpendicularly to the antenna circuit board (104); and the GNSS ceramic antenna (103) is arranged horizontally and parallel to the antenna circuit board (104).

3. The multi-frequency single-wire shark fin antenna according to claim 2, characterized in that: The circuit design of the antenna circuit board (104) is as follows: the GNSS input signal passes through the first matching circuit, the first amplifying circuit, the second matching circuit, the filter, and the third matching circuit and enters the combining network before being output; The AM, FM, and DAB input signals enter the combining network through the second amplifying circuit and are then output; the LTE input signal enters the combining network through the fourth matching circuit and is then output.

4. The multi-frequency single-wire shark fin antenna according to claim 1, characterized in that: The connection position includes a conductive contact, an insulating protection sleeve and a connecting portion, the insulating protection sleeve is circular, the conductive contact is needle-shaped and is arranged along the central axis of the insulating protection sleeve, and the connecting portion includes a limiting strip and / or a limiting groove.

5. An antenna harness integrated device, characterized in that: Adapted to the multi-frequency single-wire shark fin antenna as described in any one of claims 1 to 4; the antenna harness integrated device comprises a multi-frequency signal input part, a coupling circuit, a plurality of filters, a low noise amplifier and a plurality of signal output connectors which are electrically connected in sequence; the multi-frequency signal input part is electrically connected to the coaxial output cable (106) of the multi-frequency single-wire shark fin antenna via a male and female connector (107) and a data cable (108); the antenna harness integrated device is connected to a customer terminal (3) via a plurality of the signal output connectors.

6. The antenna harness integrated device according to claim 5, characterized in that: The LTE signal is directly output, and the GNSS, AM\FM, and DAB signals are frequency-divided through a coupling circuit, and then filtered and compensated by a low-noise amplifier to output four-channel GNSS, AM, FM, and DAB signal outputs.

7. An antenna harness integrated device according to claim 5 or 6, characterized in that: The wiring harness integration device is independently arranged between the multi-frequency single-wire shark fin antenna (11) and the customer terminal (3).

8. An antenna harness integrated device according to claim 5 or 6, characterized in that: The wiring harness integration device is integrated inside the customer terminal (3).

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