Ultra wideband wave absorber based on resistance loading

Abstract

The invention discloses an ultra wideband wave absorber based on resistance loading. The ultra wideband wave absorber comprises a dipole array antenna, patch resistors, a metal floor and four plastic screws, wherein the four plastic screws are used for locating and fixing the dipole array antenna and the metal floor, the dipole array antenna is formed by periodically arranging a plurality of same dipoles similar to butterfly wings, two welding points of a single patch resistor are separately welded at the two ends of a dipole arm so as to further achieve perfect matching with a single dipole, and an electromagnetic wave can be absorbed by the dipole array antenna and is consumed by the patch resistors so as to achieve the purpose of wave absorption. The ultra wideband wave absorber can be applied to a microwave / millimeter-wave anti-interference system and has the advantages of simplicity in structure, light weight, low cost, unit miniaturization and short processing period; and moreover, the electromagnetic wave absorption within different frequency ranges can be achieved by designing dipole antennas in different frequency ranges.

Description

technical field [0001] The invention belongs to the technical field of microwave absorbing materials, and relates to an ultra-broadband absorber. Background technique [0002] With the rapid development of modern communication, more and more electromagnetic waves in space are becoming more and more complex, which will inevitably cause interference to other systems and make the system unable to work normally, and wave absorption also plays a vital role in the stealth of the antenna. It can reduce the radar cross-sectional area of ​​the antenna, which is exactly what the stealth antenna pursues. With the development of electronic countermeasures technology, higher requirements are put forward for the absorbing structure. The direction of the planarization of the absorbing structure is developing. Therefore, the ultra-broadband research of absorbing structures is still a hotspot in the industry and academia. [0003] In order to test the broadband characteristics of absorbing...

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Problems solved by technology

It’s just that the unit size of the double-ring structure is larger than that of the unit structure of the present invention, and the number of resistors is too large. In the microwave and millimeter wave frequency band, the size of the chip resistors is very small. It is necessary to weld such a large number of micro-resistors to the double-ring. It is very time-consuming and labor-intensive. In addition, the height of the double-ring structure from the metal floor is too large, which does not meet the requirements of low profile

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