Omnidirectional antenna

Abstract

The utility model discloses an omnidirectional antenna, and relates to the technical field of omnidirectional antennas. Comprising a connector, a radome fixedly connected to the connector, a copper bush, a polytetrafluoroethylene sheet and a copper pipe which are located in the radome and fixedly connected in sequence from top to bottom, and a spring which is located in the radome, can sequentially penetrate through the copper bush, the polytetrafluoroethylene sheet and the copper pipe and is fixedly connected with an inner conductor of the connector. The antenna housing can be detached; the copper pipe is fixedly connected with the connector; the spring is fixedly connected with the copper bush, and the connector inner conductor can extend into the connector. The omnidirectional antenna provided by the utility model can avoid unstable performance caused by loosening and contraction of the conductor in the connector.

Description

Technical Field

[0001] The utility model relates to the technical field of omnidirectional antennas, in particular to an omnidirectional antenna. Background Art

[0002] An antenna is a converter that converts the guided waves propagating on the transmission line into electromagnetic waves propagating in an unbounded medium or vice versa. In radio equipment, antennas are components used to transmit or receive electromagnetic waves. In engineering systems such as telecommunications, broadcasting, television, radar, navigation, electronic countermeasures, remote sensing, and radio astronomy, all systems that use electromagnetic waves to transmit information rely on antennas to work. When inspecting or repairing an omnidirectional antenna, the antenna must be removed from the communication equipment. After multiple connections and disassemblies, the conductors in the connectors are easily loosened and contracted, resulting in unstable performance and affecting the normal use of the omnidirectional antenna. Utility Model Content

[0003] The utility model aims to provide an omnidirectional antenna to solve the problems existing in the above-mentioned prior art and to avoid unstable performance caused by looseness and contraction of the conductor in the connector.

[0004] To achieve the above purpose, the utility model provides the following solutions:

[0005] The utility model provides an omnidirectional antenna, comprising a connector, an antenna cover fixedly connected to the connector, a copper bushing, a polytetrafluoroethylene sheet and a copper tube located inside the antenna cover and fixedly connected in sequence from top to bottom, and a spring located inside the antenna cover and capable of passing through the copper bushing, the polytetrafluoroethylene sheet and the copper tube in sequence and fixedly connected to an inner conductor of the connector; the antenna cover can be disassembled; the copper tube is fixedly connected to the connector; the spring is fixedly connected to the copper bushing, and the inner conductor of the connector can extend into the connector.

[0006] Preferably, the spring is wound from a copper wire with a diameter of 1 mm.

[0007] Preferably, the spring has 16 turns with a turn pitch of 3 mm, and the spring is 73 mm long and 10 mm in diameter.

[0008] Preferably, the copper bushing, the polytetrafluoroethylene sheet and the copper tube are fixedly connected by riveting, and the copper tube and the connector are fixedly connected by welding.

[0009] Preferably, the copper tube is 18 mm in length and 10 mm in diameter.

[0010] Preferably, the spring is fixedly connected to the inner conductor of the connector by welding, and the spring is fixedly connected to the copper bushing by welding.

[0011] Preferably, the antenna cover is threadedly connected to the connector.

[0012] Compared with the prior art, the utility model has achieved the following technical effects:

[0013] The omnidirectional antenna provided by the utility model can reliably connect the spring to the connector by fixing a copper bushing, a polytetrafluoroethylene sheet and a copper tube in sequence, fixing a spring on the copper bushing, and fixing an inner conductor of the connector on the spring, so as to ensure that the antenna will not be repeatedly connected and disassembled with the communication equipment during later applications, resulting in loosening and shrinkage of the inner conductor of the connector and unstable performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 A cross-sectional view of the omnidirectional antenna provided by the utility model;

[0016] Figure 2 A schematic diagram of the structure of the spring provided by the utility model;

[0017] Figure 3 A schematic diagram of the internal structure of the omnidirectional antenna provided by the utility model;

[0018] Figure 4 The standing wave curve diagram of the omnidirectional antenna provided by the utility model;

[0019] Figure 5 A radiation efficiency curve diagram of the omnidirectional antenna provided by the utility model;

[0020] Figure 6 A gain curve diagram of the omnidirectional antenna provided by the utility model;

[0021] In the figure: 1-connector; 2-radome; 3-copper bushing; 4-PTFE sheet; 5-copper tube; 6-spring; 7-connector inner conductor; 8-welding position one; 9-welding position two; 10-welding position three. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model aims to provide an omnidirectional antenna to solve the problems existing in the prior art and to avoid unstable performance caused by looseness or contraction of the conductor in the connector.

[0024] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] The utility model provides an omnidirectional antenna, such as Figures 1 to 3 As shown, in this embodiment, it includes a connector 1, an antenna cover 2 fixedly connected to the connector 1, a copper bushing 3, a polytetrafluoroethylene sheet 4 and a copper tube 5 located inside the antenna cover 2 and fixedly connected in sequence from top to bottom, and a spring 6 located inside the antenna cover 2 and capable of passing through the copper bushing 3, the polytetrafluoroethylene sheet 4 and the copper tube 5 in sequence and fixedly connected to the conductor 7 inside the connector; the antenna cover 2 can be disassembled; the copper tube 5 is fixedly connected to the connector 1; the spring 6 is fixedly connected to the copper bushing 3, and the conductor 7 inside the connector can extend into the connector 1.

[0026] The omnidirectional antenna provided by the utility model has a frequency of 490MHz-510MHz, and on the premise of achieving miniaturization and high performance, it also has the characteristics of simple structure, reliable electrical performance, low cost, and good consistency in batch production.

[0027] The spring 6 is wound from a copper wire with a diameter of 1 mm.

[0028] The spring 6 has 16 turns, the turn pitch is 3mm, the spring 6 is 73mm long and 10mm in diameter. The radiation unit spring 6 provided by the utility model is shorter than the traditional 1 / 4 wavelength monopole in height to 0.12 wavelengths. While actively achieving the purpose of miniaturization, it still maintains low standing wave ratio, high efficiency and high gain, the standing wave is less than 1.5, the efficiency is greater than 96%, and the gain is greater than 1.74dBi. Figure 4 , Figure 5 and Figure 6 shown.

[0029] The copper bushing 3 is riveted onto the PTFE sheet 4, the PTFE sheet 4 is riveted onto the copper tube 5, and the copper bushing 3, the PTFE sheet 4 and the copper tube 5 are connected into one by riveting in sequence, and the contact surface of the copper tube 5 and the connector 1 is welded and fixed at the welding position 3 10.

[0030] The length of the copper tube 5 is 18 mm and the diameter is 10 mm. By adjusting the diameter and length of the copper tube 5, the inductive reactance component in the antenna circuit can be effectively reduced.

[0031] The spring 6 and the inner conductor 7 of the connector are welded and fixed at welding position one 8 , and the spring 6 and the copper bushing 3 are welded and fixed at welding position two 9 .

[0032] The radome 2 is threadedly connected to the connector 1 .

[0033] The omnidirectional antenna provided by the utility model is capable of reliably connecting the spring 6 to the connector 1 by riveting and fixing the copper bushing 3, the polytetrafluoroethylene sheet 4 and the copper tube 5 in sequence, welding the spring 6 to the copper bushing 3, and welding the connector inner conductor 7 to the spring 6, so as to ensure that the antenna will not be repeatedly connected and disassembled with the communication equipment during the later application process, causing the connector inner conductor 7 to loosen or shrink and produce unstable performance.

[0034] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An omnidirectional antenna, characterized in that: include: Connectors; A radome fixedly connected to the connector, wherein the radome is detachable; A copper bushing, a polytetrafluoroethylene sheet and a copper tube are located inside the antenna cover and are fixedly connected in sequence from top to bottom, and the copper tube is fixedly connected to the connector; And a spring located inside the antenna cover and capable of sequentially passing through the copper bushing, the polytetrafluoroethylene sheet and the copper tube and fixedly connected to the inner conductor of the connector, wherein the spring is fixedly connected to the copper bushing, and the inner conductor of the connector can extend into the connector.

2. An omnidirectional antenna according to claim 1, characterized in that: The spring is wound from a copper wire with a diameter of 1 mm.

3. An omnidirectional antenna according to claim 2, characterized in that: The spring has 16 turns with a turn pitch of 3 mm. The spring is 73 mm long and has a diameter of 10 mm.

4. The omnidirectional antenna according to claim 1, characterized in that: The copper bushing, the polytetrafluoroethylene sheet and the copper tube are fixedly connected by riveting, and the copper tube and the connector are fixedly connected by welding.

5. The omnidirectional antenna according to claim 4, characterized in that: The copper tube has a length of 18 mm and a diameter of 10 mm.

6. The omnidirectional antenna according to claim 4, characterized in that: The spring is fixedly connected to the inner conductor of the connector by welding, and the spring is fixedly connected to the copper bushing by welding.

7. The omnidirectional antenna according to claim 1, characterized in that: The radome is threadedly connected to the connector.

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