An external rod antenna structure of a hand-held terminal device

Abstract

The utility model discloses a kind of external rod-like antenna structures of handheld terminal equipment, including connector, radiating spring, hollow metal ring column and radiating metal column;Connector is used to connect handheld terminal equipment, and radiating spring is connected in one end of connector;Hollow metal ring column is connected in one end of connector and is set around radiating spring, and the outside wall of hollow metal ring column is provided with two slits that communicate its inside wall;Radiating metal column is connected in the end of radiating spring away from connector;Radiating spring realizes narrowband communication function, generates specific mode electromagnetic radiation, satisfies narrowband communication requirement.Two slits on hollow metal ring column concentrate the mode generated by radiating spring in the required frequency band range, realize 4G low intermediate frequency communication function.Radiating metal column optimizes reflection coefficient and radiation efficiency in wide frequency passband, ensure that it has good communication effect in 4G low intermediate frequency communication frequency band, satisfy the application demand of handheld terminal equipment under multiple communication frequency bands.

Description

Technical Field

[0001] This utility model relates to the field of antenna technology, and in particular to an external rod-shaped antenna structure for a handheld terminal device. Background Technology

[0002] With the rapid development of modern wireless communication technology, the functional requirements of handheld terminal devices are becoming increasingly diverse, while their size continues to shrink. This has led to increasingly challenging design environments for built-in antennas, even making it difficult to place some functional antennas. Meanwhile, traditional external rod antennas for handheld terminals only support narrowband communication, which can no longer meet the diverse needs of modern communication. Therefore, there is an urgent need for an external rod antenna structure for handheld terminal devices that can maintain narrowband communication functionality while also enabling 4G low-IF communication. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an external rod antenna structure for a handheld terminal device that can maintain narrowband communication function and realize 4G low-intermediate frequency communication.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an external rod-shaped antenna structure for a handheld terminal device, comprising:

[0005] Connectors are used to connect handheld terminal devices;

[0006] A radial spring is connected to one end of the connector;

[0007] A hollow metal ring is connected to one end of the connector and surrounds the radial spring. The outer side wall of the hollow metal ring has two slits that connect to its inner side wall.

[0008] A radiating metal post is connected to the end of the radiating spring furthest from the connector.

[0009] Furthermore, the two slits are symmetrically arranged with respect to the central axis of the hollow metal ring.

[0010] Furthermore, the radiating spring is arranged around the outside of the radiating metal column.

[0011] Furthermore, it also includes a rod-shaped housing, which is connected to the connector, and the radial spring, the hollow metal ring, and the radial metal column are all located inside the rod-shaped housing.

[0012] Furthermore, the rod-shaped outer shell is made of plastic.

[0013] Furthermore, the outer wall of the rod-shaped outer shell is provided with an anti-corrosion coating.

[0014] Furthermore, the radial spring is a carbon steel spring.

[0015] Furthermore, the hollow metal ring is made of aluminum alloy or stainless steel.

[0016] Furthermore, the material of the radiating metal column is copper or aluminum.

[0017] Furthermore, the connector is an SMA connector.

[0018] The beneficial effects of this utility model are as follows: The external rod-shaped antenna structure for handheld terminal devices provided by this utility model, connected to the handheld terminal device via a connector, allows for flexible installation and removal of the antenna, adapting to the diverse needs of different handheld terminal devices. The radiating spring enables narrowband communication, providing support for the hollow metal ring column while generating specific modes of electromagnetic radiation to meet narrowband communication requirements. The two slits on the hollow metal ring column concentrate the modes generated by the radiating spring within the required frequency band, forming a wideband passband, optimizing the antenna's operating frequency band, and enabling 4G low-IF communication. The radiating metal column further optimizes the reflection coefficient and radiation efficiency within the wideband passband, improving antenna performance and ensuring good communication performance within the 4G low-IF communication band, meeting the application needs of handheld terminal devices in multiple communication frequency bands. Attached Figure Description

[0019] Figure 1 This is an assembly diagram of the external rod-shaped antenna structure of the handheld terminal device according to Embodiment 1 of this utility model;

[0020] Figure 2 This is a cross-sectional schematic diagram of the external rod-shaped antenna structure of the handheld terminal device according to Embodiment 1 of this utility model;

[0021] Figure 3 This is an exploded view of the external rod-shaped antenna structure of the handheld terminal device according to Embodiment 1 of this utility model;

[0022] Figure 4 A simulation diagram comparing the reflection coefficient of the external rod antenna structure of the handheld terminal device in Embodiment 1 of this utility model with that of a traditional antenna.

[0023] Figure 5 A simulation diagram showing the radiation efficiency of the external rod antenna structure of the handheld terminal device in Embodiment 1 of this utility model compared with that of a traditional antenna.

[0024] Figure 6 This is a simulation diagram showing the maximum gain of the external rod antenna structure of the handheld terminal device in Embodiment 1 of this utility model compared with that of a traditional antenna.

[0025] Label Explanation:

[0026] 1. Connector; 2. Hollow metal ring; 21. Slit; 3. Radiating spring; 4. Radiating metal post; 5. Rod-shaped shell. Detailed Implementation

[0027] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0028] Please refer to Figures 1 to 6 An external rod-shaped antenna structure for a handheld terminal device, comprising:

[0029] Connector 1 is used to connect to a handheld terminal device;

[0030] A radial spring 3 is connected to one end of the connector 1;

[0031] A hollow metal ring 2 is connected to one end of the connector 1 and surrounds the radial spring 3. The outer side wall of the hollow metal ring 2 has two slits 21 that connect to its inner side wall.

[0032] A radiating metal post 4 is connected to the end of the radiating spring 3 that is furthest from the connector 1.

[0033] As described above, the beneficial effects of this utility model are as follows: The external rod-shaped antenna structure, connected to the handheld terminal device via connector 1, allows for flexible installation and removal of the antenna, adapting to the diverse needs of different handheld terminal devices. The radiating spring 3 enables narrowband communication, providing support for the hollow metal ring 2 while generating specific modes of electromagnetic radiation to meet narrowband communication requirements. The two slits 21 on the hollow metal ring 2 concentrate the modes generated by the radiating spring 3 within the required frequency band, forming a wideband passband, optimizing the antenna's operating frequency band, and enabling 4G low-IF communication. The radiating metal column 4 further optimizes the reflection coefficient and radiation efficiency within the wideband passband, improving antenna performance and ensuring good communication performance within the 4G low-IF communication band, meeting the application needs of handheld terminal devices in multiple communication frequency bands.

[0034] Furthermore, the two slits 21 are symmetrically arranged with respect to the central axis of the hollow metal ring column 2.

[0035] As described above, the symmetrical arrangement of the two slits 21 ensures a uniform electromagnetic field distribution. The symmetrical slit design 21 makes the antenna's radiation performance more balanced in different directions, reducing radiation blind spots and improving the antenna's directional stability. Figure 1 Consistency, enhancing communication quality.

[0036] Furthermore, the radiating spring 3 is arranged around the outside of the radiating metal column 4.

[0037] As described above, the radiating spring 3 surrounds the outside of the radiating metal column 4, making reasonable use of space, shortening the overall length of the external rod-shaped antenna structure, enhancing the stability of the antenna structure, optimizing radiation performance, improving radiation efficiency, enabling the antenna to have better radiation effect in the operating frequency band, and improving communication quality.

[0038] Furthermore, it also includes a rod-shaped outer shell 5, which is connected to the connector 1. The radial spring 3, the hollow metal ring 2, and the radial metal column 4 are all located inside the rod-shaped outer shell 5.

[0039] As described above, the rod-shaped outer shell 5 connects to the connector 1, and incorporates components such as the radiation spring 3, the hollow metal ring 2, and the radiation metal column 4, which serve to protect the internal components from damage or external interference. At the same time, it makes the antenna structure compact, easy to install and maintain, and has a neat and beautiful appearance.

[0040] Furthermore, the rod-shaped outer shell 5 is made of plastic.

[0041] As described above, the plastic rod-shaped outer shell 5 is lightweight, making it easy for handheld terminal devices to carry. It has good insulation and corrosion resistance, effectively protecting the internal metal components, preventing oxidation and rust, extending the antenna's service life, reducing production costs, and improving economic efficiency.

[0042] Furthermore, the outer wall of the rod-shaped outer shell 5 is provided with an anti-corrosion coating.

[0043] As described above, the anti-corrosion coating can effectively prevent the rod-shaped outer shell 5 from being corroded by the external environment, such as moisture, salt spray, acid rain, etc., thus extending the service life of the outer shell. At the same time, it maintains the clean appearance and structural integrity of the outer shell, ensuring that its protective function for internal components is not affected.

[0044] Furthermore, the radial spring 3 is a carbon steel spring.

[0045] As described above, the carbon steel radiation spring 3 has high strength, can withstand large tensile and compressive forces, is not easily deformed, and ensures the stability of the antenna structure. It also has good elasticity, quickly returning to its original shape, ensuring normal operation in complex environments and meeting the antenna's mechanical performance requirements. Furthermore, it possesses good conductivity and electromagnetic radiation performance, providing reliable assurance for narrowband communication functions.

[0046] Furthermore, the hollow metal ring 2 is made of aluminum alloy or stainless steel.

[0047] As described above, the hollow metal ring 2, made of aluminum alloy or stainless steel, has good electrical conductivity, effectively achieving electromagnetic shielding, preventing external electromagnetic interference from entering the antenna, and ensuring signal transmission quality. It also has high strength, supporting the radiation spring 3 and other components, maintaining the stability of the antenna structure, while possessing corrosion resistance to adapt to different environmental conditions and extend the antenna's service life.

[0048] Furthermore, the material of the radiating metal column 4 is copper or aluminum.

[0049] As described above, the copper or aluminum radiating metal pillar 4 possesses excellent conductivity, effectively guiding and optimizing the direction of electromagnetic radiation, improving radiation efficiency, enhancing antenna radiation performance, and improving communication quality. Simultaneously, its lightweight nature facilitates processing and installation, enabling miniaturization and lightweight antenna design, thus meeting the size and weight requirements of handheld terminal devices.

[0050] Furthermore, the connector 1 is an SMA connector.

[0051] As described above, the SMA connector is a standardized RF coaxial connector with excellent electrical and mechanical properties, reliable connection, and the ability to ensure stable signal transmission between the antenna and the handheld terminal device. Its versatility facilitates compatibility and interchangeability with other devices and components, improving equipment compatibility and reducing operating costs and maintenance complexity.

[0052] Please refer to Figures 1 to 6 The first embodiment of this utility model is: an external rod-shaped antenna structure for a handheld terminal device, including a connector 1, a radiating spring 3, a hollow metal ring post 2, and a radiating metal post 4; the connector 1 is used to connect the handheld terminal device. Specifically, the connector 1 is an SMA connector, which is a standardized radio frequency coaxial connector 1 with good electrical and mechanical properties, reliable connection, and can ensure stable signal transmission between the antenna and the handheld terminal device. Its versatility is strong, making it easy to match and connect with other devices and components, improving equipment compatibility and interchangeability, and reducing equipment usage costs and maintenance difficulty; the radiation spring 3 is connected to one end of the connector 1; the hollow metal ring 2 is connected to one end of the connector 1 and surrounds the radiation spring 3, and the outer side wall of the hollow metal ring 2 has two slits 21 connecting its inner side wall; the radiation metal column 4 is connected to the end of the radiation spring 3 away from the connector 1. Specifically, the two slits 21 are symmetrically arranged with respect to the central axis of the hollow metal ring 2. The symmetrical arrangement of the two slits 21 ensures uniform electromagnetic field distribution. The symmetrical slit design makes the antenna's radiation performance more balanced in different directions, reduces radiation blind spots, and improves the antenna's directional performance. Figure 1 Consistency, enhancing communication quality.

[0053] Preferably, the radiation spring 3 is arranged around the outside of the radiation metal column 4. In this way, space is made more efficient, the overall length of the external rod antenna structure is shortened, the stability of the antenna structure is enhanced, the radiation performance is optimized, the radiation efficiency is improved, and the antenna has a better radiation effect in the operating frequency band, thereby improving the communication quality.

[0054] In this embodiment, the external rod-shaped antenna structure of the handheld terminal device further includes a rod-shaped outer shell 5. The rod-shaped outer shell 5 is connected to the connector 1. The radiating spring 3, the hollow metal ring 2, and the radiating metal post 4 are all located inside the rod-shaped outer shell 5. Incorporating components such as the radiating spring 3, the hollow metal ring 2, and the radiating metal post 4 within the shell provides protection, preventing damage to internal components or external interference. It also makes the antenna structure compact, easy to install and maintain, and aesthetically pleasing. Specifically, the rod-shaped outer shell 5 is made of plastic. Plastic rod-shaped outer shell 5 is lightweight, easy to carry with the handheld terminal device, and has good insulation and corrosion resistance, effectively protecting internal metal components, preventing oxidation and rust, extending the antenna's lifespan, reducing production costs, and improving economic efficiency. More specifically, the outer wall of the rod-shaped outer shell 5 is provided with an anti-corrosion coating. This coating effectively prevents the rod-shaped outer shell 5 from being corroded by the external environment, such as moisture, salt spray, and acid rain, extending the shell's lifespan while maintaining its clean appearance and structural integrity, ensuring that its protective function for internal components is not affected.

[0055] In some embodiments, the radiation spring 3 is a carbon steel spring. Carbon steel radiation springs 3 have high strength, can withstand large tensile and compressive forces, are not easily deformed, and ensure the stability of the antenna structure. They also have good elasticity, quickly returning to their original shape, ensuring normal operation in complex environments and meeting the mechanical performance requirements of the antenna. Furthermore, they possess good conductivity and electromagnetic radiation performance, providing reliable protection for narrowband communication functions. Further, the hollow metal ring 2 is made of aluminum alloy or stainless steel. It is understood that hollow metal ring 2 made of aluminum alloy or stainless steel has good conductivity, effectively achieving electromagnetic shielding, preventing external electromagnetic interference from entering the antenna interior, and ensuring signal transmission quality. It has high strength, supporting the radiation spring 3 and other components, maintaining the stability of the antenna structure, and also possesses corrosion resistance, adapting to different environmental conditions and extending the antenna's service life. Further, the radiation metal pillar 4 is made of copper or aluminum. It is understood that copper or aluminum radiation metal pillar 4 has excellent conductivity, effectively guiding and optimizing the direction of electromagnetic radiation, improving radiation efficiency, enhancing the antenna's radiation performance, and improving communication quality. Meanwhile, the material is lightweight, easy to process and install, which helps to achieve miniaturization and lightweight design of the antenna, meeting the requirements of handheld terminal devices for antenna size and weight.

[0056] Please combine Figure 4 , Figure 4 The simulation diagram shows the reflection coefficient of the external rod antenna structure compared to a traditional antenna. When only the metal ring pillar with double slits is added, the modes generated by the radiation spring 3 are concentrated into two broadband bands, covering the narrowband and the mid-to-low frequency bands of 4G, but the reflection coefficient is very poor. When the metal pillar is added again, not only is a notch point introduced in the first broadband band to reduce interference to narrowband communication and 4G low-frequency communication, but the reflection coefficient in the passband is also optimized. Figure 4 It can be seen that the passband with a reflection coefficient of less than -5dB includes three frequency bands: 0.392-0.47GHz, 0.592-0.983GHz, and 1.688-2.156GHz, which can meet the needs of narrowband communication and low-frequency communication in the 4GHz range.

[0057] Figure 5 and Figure 6 These are the simulation results for the overall radiation efficiency and maximum gain. As shown in these two figures, adding the ring pillar with double slits concentrates the modes generated by the radiation spring 3. Adding the metal pillar not only introduces a notch filter to reduce clutter interference on narrowband and 4G low-frequency communications, but also optimizes the antenna performance within the passband. In the 0.392-0.47 GHz passband, the average radiation efficiency of the multi-functional antenna is 82.8%, and the average maximum gain is 1.19 dB; in the 0.592-0.983 GHz passband, the average radiation efficiency is 83.4%, and the average maximum gain is 2.64 dB; in the 1.688-2.156 GHz passband, the average radiation efficiency is 78.5%, and the average maximum gain is 2.17 dB.

[0058] In summary, the external rod-shaped antenna structure for handheld terminal devices provided by this utility model, connected to the handheld terminal device via a connector, allows for flexible installation and removal of the antenna, adapting to the diverse needs of different handheld terminal devices. The radiating spring enables narrowband communication, providing support for the hollow metal ring column while simultaneously generating specific modes of electromagnetic radiation to meet narrowband communication requirements. Two slits on the hollow metal ring column concentrate the mode generated by the radiating spring within the desired frequency band, forming a wideband passband, optimizing the antenna's operating frequency band, and enabling 4G low-IF communication. The radiating metal column further optimizes the reflection coefficient and radiation efficiency within the wideband passband, improving antenna performance and ensuring good communication performance within the 4G low-IF communication band, meeting the application needs of handheld terminal devices in multiple communication frequency bands.

[0059] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An external rod-shaped antenna structure for a handheld terminal device, characterized in that, include: Connectors are used to connect handheld terminal devices; A radial spring is connected to one end of the connector; A hollow metal ring is connected to one end of the connector and surrounds the radial spring. The outer side wall of the hollow metal ring has two slits that connect to its inner side wall. A radiating metal post is connected to the end of the radiating spring furthest from the connector.

2. The external rod-shaped antenna structure of the handheld terminal device according to claim 1, characterized in that, The two slits are symmetrically arranged with respect to the central axis of the hollow metal ring.

3. The external rod-shaped antenna structure of the handheld terminal device according to claim 1, characterized in that, The radial spring is arranged around the outside of the radial metal column.

4. The external rod-shaped antenna structure of the handheld terminal device according to claim 1, characterized in that, It also includes a rod-shaped housing, which is connected to the connector, and the radial spring, the hollow metal ring, and the radial metal column are all located inside the rod-shaped housing.

5. The external rod-shaped antenna structure of the handheld terminal device according to claim 4, characterized in that, The rod-shaped outer shell is made of plastic.

6. The external rod-shaped antenna structure of the handheld terminal device according to claim 4, characterized in that, The outer wall of the rod-shaped outer shell is provided with an anti-corrosion coating.

7. The external rod-shaped antenna structure of the handheld terminal device according to claim 1, characterized in that, The radial spring is a carbon steel spring.

8. The external rod-shaped antenna structure of the handheld terminal device according to claim 1, characterized in that, The hollow metal ring is made of aluminum alloy or stainless steel.

9. The external rod-shaped antenna structure of the handheld terminal device according to claim 1, characterized in that, The material of the radiating metal column is copper or aluminum.

10. The external rod-shaped antenna structure of the handheld terminal device according to claim 1, characterized in that, The connector is an SMA connector.

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