Broadband helical antenna and design method thereof

A helical antenna and wide-band technology, which is applied in the field of broadband helical antenna and its design, can solve the problem that the helical antenna cannot meet the multi-frequency and broadband requirements, and achieve the effect of wide bandwidth

Active Publication Date: 2020-02-14
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the embodiment of the present application, a wide-band helical antenna and its design method are provided to help solve the problem that the helical antenna in the prior art cannot meet the multi-frequency and broadband requirements

Method used

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  • Broadband helical antenna and design method thereof
  • Broadband helical antenna and design method thereof
  • Broadband helical antenna and design method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] In this example, Figure 1a The specific parameters of the broadband helical antenna shown are as follows. For the convenience of description, the broadband helical antenna with the following parameters is named ANT1C41.

[0050]The specific parameters of ANT1C41 are: the inner radius of the hollow cylinder is a=6.5mm, the outer radius is b=7mm, and the height h is less than 25mm. ANT1C41 includes four helical metal wires, the starting end of each helical metal wire is located in the middle part of the cylinder, wherein the first helical metal wire 11 and the second helical metal wire 12 are wound side by side on the upper half of the hollow cylinder; the third The helical metal wire 13 and the fourth helical metal wire 14 are wound side by side on the lower half of the hollow cylinder, and the ends of each helical metal wire are open. The feeding points 3 are respectively connected to the starting ends of the four helical metal wires. The number of turns of each spira...

Embodiment 2

[0106] In this example, Figure 1a The specific parameters of the broadband helical antenna shown are as follows, for the convenience of description, the broadband helical antenna with the following parameters is named ANT2C6.

[0107] The specific parameters of ANT2C6 are: it contains four helical metal wires and a short circuit point, and the number of helical metal coils can be different.

[0108] Figure 10 The structural diagram of the antenna ANT2C6 provided for the embodiment of this application, in Figure 23 Among them, the number of turns of the first helical wire 21 is n1=12, the number of turns of the second helix 22 is n2=6, the number of turns of the third helix 23 is n3=12, and the number of turns of the fourth helix 24 For n4=8, the helix angle of the short-circuit point φ15=240°.

[0109] Table 4 is a comparison table of resonant frequency and bandwidth under different circumstances of antenna ANT2C6 helical turns provided by the embodiment of the present ap...

Embodiment 3

[0121] In this example, Figure 1a The specific parameters of the broadband helical antenna shown are as follows. For the convenience of description, the broadband helical antenna with the following parameters is named ANT3536.

[0122] Figure 14 The structural diagram of the antenna ANT3536 provided for the embodiment of the present application, the specific parameters of the ANT3536 are: it contains two short-circuit points and four spiral metal wires, and the two short-circuit points are respectively the first short-circuit point 35 and the second short-circuit point 36, The number of turns of the four helices is the same n=7.

[0123] In order to study the working principle of ANT3536, the embodiment of the present application provides three reference antennas, namely ANT35 (only the first short-circuit point 35 does not have the second short-circuit point 36), ANT36 (only the second short-circuit point 36 does not have the first short-circuit point 35), ANT30 (does not ...

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Abstract

The embodiment of the invention discloses a broadband helical antenna and a design method thereof. The antenna comprises a hollow cylinder and a spiral metal wire, wherein the inner layer of the hollow cylinder is a metal ground, the outer layer of the hollow cylinder is a magnetic material, the spiral metal wire is wound on the outer side of the magnetic material, the spiral metal wire is furtherprovided with a feeding point and a short circuit point, and the short circuit point is used for conducting the spiral metal wire and the metal ground. According to the broadband helical antenna provided by the embodiment of the invention, the short circuit point is added, the helical metal wire and the metal ground are connected, the current distribution can be changed, a new current path is formed to form a new radiation oscillator, a plurality of resonance modes are excited in a frequency band of 10-80MHz, a multi-band and broadband antenna is formed, and the broadband helical antenna hasa wide bandwidth. The antenna provided by the embodiment of the invention further comprises a radio frequency switch which is used for adjusting the disconnection or connection state of the short circuit metal sheet and the disconnection or connection state of the spiral metal wire so as to adjust the resonant frequency.

Description

technical field [0001] The present application relates to the technical field of antennas, in particular to a broadband helical antenna and a design method thereof. Background technique [0002] The antenna is a component used to transmit or receive electromagnetic waves in radio equipment. It transforms the guided wave propagating on the transmission line into electromagnetic waves propagating in free space, or performs the opposite transformation. It is widely used in radio communication, broadcasting, and television. , radar, navigation, electronic countermeasures, remote sensing, radio astronomy and other engineering systems. [0003] In many wireless communication systems, antennas are required to be small, multi-frequency, and wide-band, such as antennas in capsule endoscopes. In the prior art, in order to reduce the size of the antenna in the capsule endoscope, the antenna is usually made into a helical structure. Since the main part of the capsule endoscope is cylin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q1/48H01Q1/50H01Q9/27
CPCH01Q1/36H01Q1/48H01Q1/50H01Q9/27
Inventor 宗卫华刘路路李洪飞王建青李山东
Owner QINGDAO UNIV
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