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Broadband microwave absorber based on folded dipole

A folded dipole and microwave absorption technology, applied to antennas, electrical components, etc., can solve problems such as difficult implementation, low-profile characteristics, and complex implementation methods, and achieve the effects of low cost, small weight, and simple structure

Inactive Publication Date: 2013-12-04
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] It can be seen from the above that the implementation method of the prior art is relatively complicated, and it is difficult to realize a microwave absorber with a wide operating bandwidth and a low profile

Method used

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  • Broadband microwave absorber based on folded dipole
  • Broadband microwave absorber based on folded dipole
  • Broadband microwave absorber based on folded dipole

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Embodiment Construction

[0012] combine figure 1 , figure 2 and image 3 , a broadband microwave absorber based on folded dipoles of the present invention uses the folded dipole structure as the basic structure to form an array, and uses four centrally symmetrical half folded dipole structures as a periodic unit for two-dimensional Arrangement, the angle between two adjacent folded dipole structures is 90 degrees, and all incomplete folded dipole structures in the periodic unit at the boundary are supplemented by half folded dipole structures symmetrical to it respectively, The above structure is printed on the dielectric substrate 7, the metal plate 9 is arranged under the dielectric substrate 7, and the polystyrene foam board 8 is filled between the dielectric substrate 7 and the metal plate 9 to support the dielectric substrate 7, and each folded dipole structure It includes interconnected non-feed metal arm 1 and feed metal arm 2 with the same length. The two are parallel to each other and thei...

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Abstract

The invention relates to a microwave absorber with broadband absorption characteristics, in particular to a broadband microwave absorber based on a folded dipole. According to the broadband microwave absorber, a folded dipole antenna serves as a design starting point, an antenna array with a broadband is designed based on a smith chart impedance adjustment method, furthermore, a feed source is replaced by a load resistor based on the reciprocity principle of the antenna, and therefore the microwave absorber with the broadband absorption characteristics is obtained. A dielectric layer of the absorber is of a double-layer structure, the upper layer is a common dielectric substrate, and the lower layer is common polystyrene foam materials (the dielectric constant is approximately 1.07). Although double-layer dielectric materials are adopted, a single-layer metal SMD circuit is adopted to be used in cooperation with a thin film SMD resistor. The broadband microwave absorber based on the folded dipole is simpler in structure, easier to process, low in cost and light in weight, and therefore mass production can be achieved.

Description

technical field [0001] The invention relates to an electromagnetic wave absorbing circuit for electromagnetic compatibility design and radar absorbing material, in particular to a broadband microwave absorber based on folded dipoles. Background technique [0002] The research on the safety of electronic equipment in the electromagnetic environment originated from the research on the prevention of electromagnetic information leakage of military equipment, which is called TEMPEST technology (electromagnetic information leakage protection technology). With the wide application and rapid replacement of civilian electronic information products, the electromagnetic environment safety of electronic equipment has also attracted attention. Unlike TEMPEST technology, civilian electronic information products mainly consider not only their own information leakage, but external Whether the electromagnetic field will affect the normal operation of its own equipment and whether the electro...

Claims

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Application Information

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IPC IPC(8): H01Q17/00
Inventor 车文荃常玉梅周雍韩叶熊瑛
Owner NANJING UNIV OF SCI & TECH
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