External antenna

Abstract

The utility model provides an external antenna which comprises a spring antenna, an antenna sleeve, a first heat shrink tube, a radio frequency line feeder, a radio frequency line ground wire and a radio frequency signal line, and the spring antenna, the radio frequency line feeder and the radio frequency line ground wire are all accommodated in the first heat shrink tube. The antenna sleeve is connected to one end of the first heat shrink tube in a sleeving mode and matched with the first heat shrink tube to wrap the spring antenna, the radio frequency line feeder is electrically connected with the spring antenna, the radio frequency line ground wire is electrically connected with the radio frequency line feeder, the radio frequency signal line extends into the first heat shrink tube and is electrically connected with the radio frequency line ground wire, and the radio frequency signal line is electrically connected with the radio frequency line ground wire. The radio frequency signal line is used for being electrically connected with a communication terminal; after the first heat shrink tube is heated and processed, the spring antenna, the radio frequency line feeder and the radio frequency line ground wire are tightly wrapped, internal devices are not prone to loosening and deformation after falling and collision, the service life of the external antenna is prolonged, and the external antenna is applied to LoRa, is high in interference resistance and long in radiation distance and serves as an antenna researched and developed by a smoke alarm.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, and particularly to an external antenna. Background Art

[0002] At present, an antenna is a component used to transmit or receive electromagnetic waves in a radio device. It converts the guided wave propagating on the transmission line into an electromagnetic wave propagating in an unbounded medium (usually free space), or performs the reverse conversion. Antennas are widely used in engineering systems such as radio communication, broadcasting, television, radar, navigation, electronic countermeasure, remote sensing, and radio astronomy. For the antennas on communication terminal devices, they are divided into internal antennas and external antennas. Among them, the internal antennas are small in size but poor in signal strength, while the external antennas are large in size but good in signal strength. Generally, an external antenna consists of a protective housing and a radio wave receiving device housed in the protective housing. However, the existing protective housing has the following defects: when the antenna is assembled on the terminal device, there is likely to be a gap between the internal components and the housing during assembly, resulting in the internal components of the external antenna being prone to looseness and deformation after being dropped or bumped, thereby affecting the service life of the external antenna.

[0003] In view of this, it is necessary to provide a new type of external antenna to overcome the above defects. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an external antenna. After the first heat shrinkable tube is completed by heating and processing, it tightly wraps the spring antenna, the RF line feeder, and the RF line ground wire, making the internal components of the external antenna not easily loosen and deform after being dropped or bumped, and improving the service life of the external antenna.

[0005] To achieve the above purpose, the utility model provides an external antenna, which includes a spring antenna, an antenna sleeve, a first heat shrinkable tube, an RF line feeder, an RF line ground wire, and an RF signal line. The spring antenna, the RF line feeder, and the RF line ground wire are all installed in the first heat shrinkable tube. The antenna sleeve is sleeved at one end of the first heat shrinkable tube and cooperates with the first heat shrinkable tube to wrap the spring antenna.

[0006] The RF line feeder is electrically connected to the spring antenna, the RF line ground wire is electrically connected to the RF line feeder, the RF signal line extends into the first heat shrinkable tube and is electrically connected to the RF line ground wire, and the RF signal line is used for electrically connecting to a communication terminal.

[0007] Preferably, one end of the RF signal line extends into the first heat shrinkable tube, and the other end of the RF signal line is connected with a connector.

[0008] Preferably, the connector is an SMA connector.

[0009] Preferably, a nut is formed on the outer ring of the joint, and the nut is a hexagonal nut.

[0010] Preferably, a second heat shrinkable tube is sleeved on the outer part of one end of the RF signal line connected to the joint.

[0011] Preferably, the spring antenna, the antenna sleeve, the first heat shrinkable tube, the RF feeder line, the RF ground line, the RF signal line, the joint and the second heat shrinkable tube are coaxially arranged.

[0012] Compared with the prior art, the beneficial effects are as follows: 1) After the first heat shrinkable tube is completed by heating and processing, the spring antenna, the RF feeder line and the RF ground line are tightly wrapped, so that the internal components of the external antenna are not easily loosened and deformed after being dropped or collided, and the service life of the external antenna is improved.

[0013] 2) The external antenna is designed according to the frequency of 470 - 510 MHz and is applied to LoRa, with strong anti-interference ability and long radiation distance. It is an antenna developed for smoke alarms.

[0014] Other features and advantages of the present utility model will be described in the following description, and some will be obvious from the description, or can be understood through the implementation of the present utility model. The features and advantages of the present utility model can be realized and obtained through the elements and combinations specifically pointed out in the appended claims. These and other features of the present utility model will become more clear and understandable according to the following description and the appended claims, or can be understood through the implementation of the embodiments described in the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a cross-sectional view of the external antenna provided by the present utility model.

[0017] Figure 2 is Figure 1 a schematic structural diagram of the joint of the external antenna shown.

[0018] Reference numerals: 1, spring antenna; 2, antenna sleeve; 3, first heat shrinkable tube; 4, RF feeder line; 5, RF ground line; 6, RF signal line; 7, second heat shrinkable tube; 8, joint. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the objectives, technical solutions and beneficial technical effects of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described in this specification are only for explaining the present utility model and not for limiting the present utility model.

[0020] It should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0021] It should also be noted that unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", "setting", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be determined according to specific circumstances.

[0022] In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third" may explicitly or implicitly include one or more of such features. In addition, the meanings of "multiple" and "several" refer to two or more, unless otherwise clearly and specifically defined.

[0023] Please refer to Figures 1 to 2 , the present utility model provides an external antenna, which includes a spring antenna 1, an antenna sleeve 2, a first heat shrinkable tube 3, a radio frequency line feeder 4, a radio frequency line ground wire 5, and a radio frequency signal line 6. The spring antenna 1, the radio frequency line feeder 4, and the radio frequency line ground wire 5 are all installed in the first heat shrinkable tube 3. The antenna sleeve 2 is sleeved at one end of the first heat shrinkable tube 3 and cooperates with the first heat shrinkable tube 3 to wrap the spring antenna 1.

[0024] The radio frequency line feeder 4 is electrically connected to the spring antenna 1. The radio frequency line ground wire 5 is electrically connected to the radio frequency line feeder 4. The radio frequency signal line 6 extends into the first heat shrinkable tube 3 and is electrically connected to the radio frequency line ground wire 5. The radio frequency signal line 6 is used for electrically connecting to a communication terminal.

[0025] It should be noted that in this embodiment, the communication terminal is the user's intelligent handheld device, and the radio signals received by the external antenna can be WIFI, LTE B1 / 3 / 38 / 39 / 40 / 41, WCDMA 2100, etc. according to the user's needs.

[0026] In this way, after the first heat shrinkable tube 3 is completed by heating and processing, it tightly wraps the spring antenna 1, the RF line feeder 4, and the RF line ground wire 5. The spring antenna 1 receives radio signals and transmits the radio signals to the RF module of the communication terminal through the RF signal line 6. When feeding power, a high-frequency current is generated between the RF line feeder 4 and the RF line ground wire 5, and this high-frequency current will generate a radiation field (electric field, magnetic field) to form electromagnetic waves. In addition, this external antenna is designed according to the frequency of 470 - 510 MHz, which is applied to LoRa, has strong anti-interference ability and a long radiation distance, and is an antenna developed for smoke alarms.

[0027] In a preferred embodiment, one end of the RF signal line 6 extends into the first heat shrinkable tube 3, and the other end of the RF signal line 6 is connected with a connector 8, which is connected to the interface on the communication terminal through the connector 8. It should be noted that in this embodiment, the connector 8 is an SMA (Sub-Miniature-A) connector 8.

[0028] In a preferred embodiment, a nut is formed on the outer ring of the connector 8. The connector 8 is integrally formed, and the nut is a hexagonal nut, which is convenient for screwing the connector 8 through the nut.

[0029] In a preferred embodiment, a second heat shrinkable tube 7 is sleeved outside the end of the RF signal line 6 connected to the connector 8. After the connector 8 and the RF signal line 6 are assembled, the second heat shrinkable tube 7 tightly wraps the connection part of the RF signal line 6 and the connector 8 after heating and processing.

[0030] In a preferred embodiment, the spring antenna 1, the antenna sleeve 2, the first heat shrinkable tube 3, the RF line feeder 4, the RF line ground wire 5, the RF signal line 6, the connector 8, and the second heat shrinkable tube 7 are coaxially arranged, making its overall volume smaller and convenient to carry.

[0031] The present utility model is not limited only to what is described in the specification and the embodiments. Therefore, for those skilled in the art, additional advantages and modifications can be easily achieved. Thus, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present utility model is not limited to specific details, representative devices, and the illustrated examples shown and described herein.

Claims

1. An external antenna, characterized in that: The invention comprises a spring antenna (1), an antenna sleeve (2), a first heat shrink tube (3), a radio frequency line feeder (4), a radio frequency line ground wire (5) and a radio frequency signal line (6), wherein the spring antenna (1), the radio frequency line feeder (4) and the radio frequency line ground wire (5) are all received in the first heat shrink tube (3), and the antenna sleeve (2) is sleeved on one end of the first heat shrink tube (3) and cooperates with the first heat shrink tube (3) to wrap the spring antenna (1). The RF line feeder (4) is electrically connected to the spring antenna (1), the RF line ground wire (5) is electrically connected to the RF line feeder (4), the RF signal line (6) extends into the first heat shrink tube (3) and is electrically connected to the RF line ground wire (5), and the RF signal line (6) is used to be electrically connected to a communication terminal.

2. The external antenna according to claim 1, characterized in that: One end of the radio frequency signal line (6) extends into the interior of the first heat shrink tube (3), and the other end of the radio frequency signal line (6) is connected to a connector (8).

3. The external antenna according to claim 2, characterized in that: The connector (8) is an SMA connector (8).

4. The external antenna according to claim 2, characterized in that: The outer ring of the joint (8) is formed with a nut, and the nut is a hexagonal nut.

5. The external antenna according to claim 2, characterized in that: A second heat shrink tube (7) is externally sleeved on one end of the radio frequency signal line (6) connected to the connector (8).

6. The external antenna according to claim 2, characterized in that: The spring antenna (1), the antenna sleeve (2), the first heat shrink tube (3), the radio frequency line feeder (4), the radio frequency line ground wire (5), the radio frequency signal line (6), the connector (8) and the second heat shrink tube (7) are coaxially arranged.

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