Helical antenna

Abstract

The utility model discloses a helical antenna, which comprises a microwave dielectric body, a first radiation arm, a second radiation arm, a third radiation arm, a fourth radiation arm, a feed network and a mounting plate, the first radiation arm, the second radiation arm, the third radiation arm and the fourth radiation arm are sequentially installed on the microwave dielectric body in a surrounding mode with the difference of 90 degrees. The first radiation arm is provided with a first radiation main body and a first radiation secondary body which are integrally formed, the first radiation main body is installed on the side face of the microwave dielectric body, and the first radiation secondary body is installed on the first bottom face of the microwave dielectric body. The utility model discloses a helical antenna, and provides a helical antenna which is simple to process and manufacture, low in cost, resistant to overload impact and high and low temperature impact, light in weight and small in size, and conforms to special use scenes.

Description

Technical Field

[0001] The utility model belongs to the technical field of antennas, and in particular relates to a helical antenna. Background Art

[0002] The helical antenna was proposed by Dr. Kilgus of the Applied Physics Laboratory of Johns Hopkins University in the United States in 1968. The antenna has a heart-shaped radiation pattern, a good front-to-back ratio and excellent circular polarization characteristics. Therefore, it is widely used in the Beidou satellite navigation and communication system and is considered to be an ideal satellite receiving antenna. At present, the positioning system technology is booming in the civilian field, especially in vehicle navigation and personal mobile terminal positioning.

[0003] The helical antennas used in today's navigation and communication systems are generally made of FPC materials, which can basically meet the requirements of civilian use. However, they cannot work in some special military use scenarios that require resistance to overload shock, high and low temperature shock, lightweight, and miniaturization. Utility Model Content

[0004] The main purpose of the utility model is to provide a helical antenna, which is simple to manufacture, low in cost, resistant to overload impact, high and low temperature impact, lightweight, miniaturized, and suitable for special usage scenarios.

[0005] To achieve the above purpose, the utility model provides a helical antenna, including a microwave dielectric body, a first radiating arm, a second radiating arm, a third radiating arm, a fourth radiating arm, a feeding network and a mounting plate, wherein:

[0006] The microwave dielectric body is cylindrical, and the first radiation arm, the second radiation arm, the third radiation arm and the fourth radiation arm are sequentially installed around the microwave dielectric body at a difference of 90°;

[0007] The first radiation arm is provided with an integrally formed first radiation body and a first radiation sub-body, the first radiation body is installed on the side of the microwave dielectric body and the first radiation sub-body is installed on the first bottom surface of the microwave dielectric body; the second radiation arm is provided with an integrally formed second radiation body and a second radiation sub-body, the second radiation body is installed on the side of the microwave dielectric body and the second radiation sub-body is installed on the first bottom surface of the microwave dielectric body; the third radiation arm is provided with an integrally formed third radiation body and a third radiation sub-body, the third radiation body is installed on the side of the microwave dielectric body and the third radiation sub-body is installed on the first bottom surface of the microwave dielectric body; the fourth radiation arm is provided with an integrally formed fourth radiation body and a fourth radiation sub-body, the fourth radiation body is installed on the side of the microwave dielectric body and the fourth radiation sub-body is installed on the first bottom surface of the microwave dielectric body;

[0008] The mounting plate is mounted on the second bottom surface of the microwave dielectric body, the mounting plate surrounds the feeding network, and the feeding network is connected to the microwave dielectric body.

[0009] As a further preferred technical solution of the above technical solution, the installation plate is provided with a plurality of installation positioning holes (for installing the entire antenna at a desired position).

[0010] As a further preferred technical solution of the above technical solution, the microwave dielectric body has a dielectric constant of 2.65, a diameter of 18 mm, and a height of 18 mm.

[0011] As a further preferred technical solution of the above technical solution, the first radiating arm, the second radiating arm, the third radiating arm and the fourth radiating arm are all provided with a grounding branch at one end close to the second bottom surface of the microwave dielectric body.

[0012] As a further preferred technical solution of the above technical solution, the mounting plate is in a circular ring shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a structural schematic diagram of a helical antenna.

[0014] Figure 2 The utility model is a structural schematic diagram of a helical antenna.

[0015] Figure 3 The utility model discloses an antenna E-plane radiation diagram of a helical antenna.

[0016] Figure 4 It is a 3D radiation diagram of a helical antenna of the utility model.

[0017] The reference numerals include: 10, microwave dielectric body; 20, first radiator; 21, first radiating body; 22, first radiating sub-body; 30, second radiator; 31, second radiating body; 32, second radiating sub-body; 40, third radiator; 41, third radiating body; 42, third radiating sub-body; 50, fourth radiator; 51, fourth radiating body; 52, fourth radiating sub-body; 60, feeding network; 70, mounting plate; 71, mounting positioning hole; 80, grounding branch. DETAILED DESCRIPTION

[0018] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0019] The utility model discloses a helical antenna. The specific embodiments of the utility model are further described below in conjunction with preferred embodiments.

[0020] In the embodiments of the present invention, those skilled in the art will note that the circular ring shape and the like involved in the present invention may be regarded as prior art.

[0021] Preferred embodiments.

[0022] like Figure 1-4 As shown, the utility model discloses a helical antenna, comprising a microwave dielectric body 10, a first radiating arm 20, a second radiating arm 30, a third radiating arm 40, a fourth radiating arm 50, a feeding network 60 and a mounting plate 70, wherein:

[0023] The microwave dielectric body 10 is cylindrical, and the first radiation arm 20, the second radiation arm 30, the third radiation arm 40 and the fourth radiation arm 50 are sequentially installed around the microwave dielectric body 10 at a difference of 90 degrees;

[0024] The first radiation arm 20 is provided with an integrally formed first radiation body 21 and a first radiation sub-body 22, the first radiation body 21 is installed on the side of the microwave dielectric body 10 and the first radiation sub-body 22 is installed on the first bottom surface of the microwave dielectric body 10; the second radiation arm 30 is provided with an integrally formed second radiation body 31 and a second radiation sub-body 32, the second radiation body 31 is installed on the side of the microwave dielectric body 10 and the second radiation sub-body 32 is installed on the first bottom surface of the microwave dielectric body 10; the third radiation arm 40 is provided with an integrally formed third radiation body 41 and a third radiation sub-body 42, the third radiation body 41 is installed on the side of the microwave dielectric body 10 and the third radiation sub-body 42 is installed on the first bottom surface of the microwave dielectric body 10; the fourth radiation arm 50 is provided with an integrally formed fourth radiation body 51 and a fourth radiation sub-body 52, the fourth radiation body 51 is installed on the side of the microwave dielectric body 10 and the fourth radiation sub-body 52 is installed on the first bottom surface of the microwave dielectric body 10;

[0025] The mounting plate 70 is mounted on the second bottom surface of the microwave dielectric body 10 . The mounting plate 70 surrounds the feeding network 60 , and the feeding network 60 is connected to the microwave dielectric body 10 .

[0026] Specifically, the installation plate 70 is provided with a plurality of installation positioning holes 71 (used to install the entire antenna at a desired position).

[0027] More specifically, the microwave dielectric body 10 has a dielectric constant of 2.65, a diameter of 18 mm, and a height of 18 mm.

[0028] Furthermore, one end of the first radiation arm 20 , the second radiation arm 30 , the third radiation arm 40 and the fourth radiation arm 50 close to the second bottom surface of the microwave dielectric body 10 is provided with a grounding branch 80 .

[0029] Furthermore, the mounting plate 70 is in a ring shape.

[0030] Preferably, the lengths and widths of the first to fourth radiation arms are adjustable, and the feeding network is arranged in a groove at the bottom of the microwave dielectric body.

[0031] By adjusting the length of the radiation arm, the frequency can be adjusted to 1.2Ghz-1.65Ghz, covering the satellite navigation system frequency band of BD.

[0032] The four groups of radiation arms in the feeding network are connected to the groove feeding network at the bottom of the microwave dielectric body, and the grounding branches in the four groups of radiation arms are grounded.

[0033] Preferably, the mounting plate and the microwave dielectric body are integrally formed.

[0034] The helical antenna of the utility model is simple to manufacture and has low cost. The total weight is only 9.1g and the diameter is only 18mm. It can withstand a 200G overload test and can meet the requirements of special usage scenarios.

[0035] It is worth mentioning that the technical features such as the circular shape involved in this utility model patent application should be regarded as the prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected by conventional methods in the field, and should not be regarded as the invention point of this utility model patent. This utility model patent will not be further elaborated.

[0036] For those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A helical antenna, characterized in that: The invention comprises a microwave dielectric body, a first radiation arm, a second radiation arm, a third radiation arm, a fourth radiation arm, a feeding network and a mounting plate, wherein: The microwave dielectric body is cylindrical, and the first radiation arm, the second radiation arm, the third radiation arm and the fourth radiation arm are sequentially installed around the microwave dielectric body at a difference of 90°; The first radiation arm is provided with an integrally formed first radiation body and a first radiation sub-body, the first radiation body is installed on the side of the microwave dielectric body and the first radiation sub-body is installed on the first bottom surface of the microwave dielectric body; the second radiation arm is provided with an integrally formed second radiation body and a second radiation sub-body, the second radiation body is installed on the side of the microwave dielectric body and the second radiation sub-body is installed on the first bottom surface of the microwave dielectric body; the third radiation arm is provided with an integrally formed third radiation body and a third radiation sub-body, the third radiation body is installed on the side of the microwave dielectric body and the third radiation sub-body is installed on the first bottom surface of the microwave dielectric body; the fourth radiation arm is provided with an integrally formed fourth radiation body and a fourth radiation sub-body, the fourth radiation body is installed on the side of the microwave dielectric body and the fourth radiation sub-body is installed on the first bottom surface of the microwave dielectric body; The mounting plate is mounted on the second bottom surface of the microwave dielectric body, the mounting plate surrounds the feeding network, and the feeding network is connected to the microwave dielectric body.

2. A helical antenna according to claim 1, characterized in that: The installation plate is provided with a plurality of installation positioning holes.

3. A helical antenna according to claim 2, characterized in that: The microwave dielectric body has a dielectric constant of 2.65, a diameter of 18 mm, and a height of 18 mm.

4. A helical antenna according to claim 3, characterized in that: The first radiation arm, the second radiation arm, the third radiation arm and the fourth radiation arm are all provided with a grounding branch at one end close to the second bottom surface of the microwave dielectric body.

5. A helical antenna according to claim 4, characterized in that: The mounting plate is in a circular ring shape.

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