Tree-shaped antenna

An antenna and tree-shaped technology, applied in the field of miniaturized ultra-wideband antennas, can solve the problems of inability to achieve wide bandwidth angular scanning, unsuitable for airborne platform installation, large logarithmic period antenna unit size, etc. The effect of reducing floor space and lateral size reduction

Active Publication Date: 2014-01-08
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve problems such as the large size of the conventional log-periodic antenna unit, which is not suitable for installation on the airborne platform and cannot realize wide-bandwidth angular scanning, it is necessary to reduce the size of the conventional log-periodic antenna, especially the size in the width direction. The present invention provides An Improved Tree Log Periodic Antenna

Method used

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Embodiment 1

[0032] see Figure 4 , a preferred embodiment of the present invention is a first-order fractal log-periodic antenna. The antenna includes a first feeder rod 11, a second feeder rod 12 and six pairs of vibrators; the upper ends of the first feeder rod 11 and the second feeder rod 12 are connected to form a herringbone, and the gap between the two feeder rods is The angle 18 between the feed rods is 6 degrees; each pair of vibrators is one level, and the six pairs of vibrators increase step by step from top to bottom; the six pairs of vibrators are all first-order fractal vibrators, which are the first fractal vibrator 1 and the second fractal vibrator respectively. The vibrator 2, the third fractal vibrator 3, the fourth fractal vibrator 4, the fifth fractal vibrator 5 and the sixth fractal vibrator 6 are respectively symmetrically installed on two feeder rods; the structures of the six pairs of vibrators are the same, but the sizes are different. See the specific structure ...

Embodiment 2

[0037] see Figure 5 , another preferred embodiment of the present invention is a second-order fractal log-periodic antenna. The antenna includes a first feeder rod 11, a second feeder rod 12 and four pairs of second-order fractal oscillators, and each pair of second-order fractal oscillators in the four pairs of second-order fractal oscillators is the seventh fractal oscillator 7 and the eighth fractal oscillator respectively. Vibrator 8, ninth fractal vibrator 9, and tenth fractal vibrator 10; the upper ends of the two feed rods are connected to form a herringbone shape, and the angle 18 between the two feed rods is 6 degrees; each pair of two The first-order fractal oscillators are symmetrically installed on two feed rods; each pair of second-order fractal oscillators has the same structure, but different sizes, and the size increases gradually from top to bottom. See the specific structure image 3 , the second-order fractal oscillator includes three first-order fractal ...

Embodiment 3

[0043] see figure 1 , another preferred embodiment of the present invention is a logarithmic periodic antenna composed of a first-order fractal oscillator and a second-order fractal oscillator. The antenna includes a first feeder rod 11, a second feeder rod 12, six pairs of first-order fractal oscillators and four pairs of second-order fractal oscillators, and one group of six pairs of first-order fractal oscillators is the first fractal oscillator 1, the second Fractal oscillator 2, third fractal oscillator 3, fourth fractal oscillator 4, fifth fractal oscillator 5 and sixth fractal oscillator 6, one of the four pairs of second-order fractal oscillators is the seventh fractal oscillator 7, the eighth fractal oscillator 8, The ninth fractal vibrator 9 and the tenth fractal vibrator 10; the upper ends of the two feed rods are connected to form a herringbone shape, and the included angle is 18 between the feed rods; each pair of fractal vibrator is symmetrically installed on th...

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Abstract

The invention relates to a tree-shaped antenna, which comprises two feeding poles and more than three pairs of oscillators, wherein each pair of oscillators are in one step; the more than three pairs of oscillators are increased step by step from top to bottom; the upper ends of two feeding poles are connected to form a herringbone; each pair of oscillators are respectively and symmetrically installed on the two feeding poles; each pair of oscillators have the same structure but different sizes; the oscillators are one-stage fractons or two-stage fractons; each fracton comprises three fraction arms which are successively connected and are in the horizontal pole shape; the junction of adjacent fracton arms is provided with a vertically-upward fracton arm or a vertically-downward fracton arm; the lengths of the fracton arms are equal; one end of three successively-connected fracton arms is connected with one feeding pole, and the other end is connected with a one-stage loading metal bar. According to the tree-shaped antenna disclosed by the invention, the volume of the antenna is greatly reduced, the problem that the common metre wave log-periodic antenna can not be suitable to install on an airborne platform is solved, antenna cross coupling is lowered, and the electrical property can satisfy the system use requirement.

Description

technical field [0001] The invention belongs to the technical field of logarithmic periodic antennas for receiving or transmitting ultra-wideband meter-wave band electromagnetic waves, and in particular relates to a miniaturized ultra-wideband antenna. Background technique [0002] Electronic Support Measures (ESM) in the radar band are critical sensors for situational awareness, tactical intelligence, targeting support and threat warning. By intercepting, locating, classifying and identifying specific radar radiation sources, radar ESM can provide combatants with information on the enemy's electronic battle sequence and can effectively identify the enemy, providing details of its position and capabilities. The Electronic Support Measures (ESM) system is an important part of the airborne mission electronic system. Usually the main operational target of the electronic support system is to work at 2-18 GHz, and it has also been extended to 0.5-2 GHz and 18-40 GHz. With the vi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q1/50
Inventor 秦浩方佳曹锐臧永东
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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