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Small-sized antenna of spread spectrum radio rescue system

A small antenna and radio technology, applied in the direction of antenna grounding device, radiation element structure, etc., can solve the problems of low antenna gain, inability to receive signals omnidirectionally, difficult system requirements, etc.

Inactive Publication Date: 2011-07-06
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, practical application experience shows that the existing antennas are mainly used in the 440MHz frequency band. If the above-mentioned antenna miniaturization method is used in the 248MHz frequency band, the size of the system receiving antenna still reaches 12.5cm, and at the same time, the antenna gain is low, and it cannot receive signals in all directions. problem, difficulty meeting system requirements

Method used

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  • Small-sized antenna of spread spectrum radio rescue system
  • Small-sized antenna of spread spectrum radio rescue system
  • Small-sized antenna of spread spectrum radio rescue system

Examples

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Embodiment Construction

[0066] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0067] The invention is a corner reflector antenna based on Hilbert fractal, and it is used as a receiving antenna in receiving equipment of a spread spectrum radio lifesaving system.

[0068] Figure 1 is the Hilbert fractal curve of order 1 to 3.

[0069] figure 2 It is the final structural diagram of the antenna in the present invention, by figure 2 It can be seen that the angular reflector antenna based on the Hilbert fractal is selected as 45 degrees, and the coaxial line is used for feeding. Vinyl fluoride, two Hilbert fractal baffles are fixed, and the feed point is the end of the fixed boundary.

[0070] image 3 For the actual measurement model of the antenna in the present invention, the material of the ground plate is selected as a metal with good conductivity.

[0071] The antenna structure data in the present invention are shown in the following...

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Abstract

The invention discloses a small-sized antenna of a spread spectrum radio rescue system. The small-sized antenna comprises a dielectric layer and two pieces of completely the same conductor layers, wherein the two pieces of conductor layers are laid and etched on the upper surface of the dielectric layer; the aperture angle between the conductor layers is 45 degrees; each piece consists of a plurality of bent conductor sections which are connected with one another end to end; the bent conductor sections have a third-order Hilbert fractal curve shape; conductors are vertically arranged at the corners to form a radiating antenna element; a covering surface of the conductor layer on the dielectric layer is rectangular; and the side length value of the covering surface is equal to the side length value of the conductor layer. Experimental data shows that the antenna can work at the frequency band of 248MHz, and has the characteristics of omnidirectional and multi-band working, high standing wave characteristic, high gain and low profile. The small-sized antenna can be used for the spread spectrum radio rescue system and can also be popularized to other related systems.

Description

technical field [0001] The invention relates to an antenna, in particular to a miniaturized antenna applicable to a spread spectrum radio rescue system. Background technique [0002] The spread spectrum radio lifesaving system works in the very high frequency band and relies on the satellite navigation and positioning system to provide positioning information. It has the characteristics of large working range, high positioning accuracy, good confidentiality, good real-time performance, stability and reliability, and is widely used in the field of search and rescue. Important auxiliary equipment in the field. The "AN / PRC" series products in the United States are typical representatives. [0003] In recent years, with the continuous development of the performance of electronic devices, people have higher and higher requirements for the integration of spread spectrum radio lifesaving equipment. Miniaturization and high performance are the main development directions of the cur...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/48
Inventor 刘洋赵琳王伟李洲李红红
Owner HARBIN ENG UNIV
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