Passband-controllable double-side frequency bandwidth wave-absorbing body
A kind of absorber, bilateral technology, applied in the direction of antenna, electrical components, etc., to achieve the effect of small passband insertion loss, wide absorption bandwidth and high absorption rate
Active Publication Date: 2018-01-19
NAT UNIV OF DEFENSE TECH
View PDF10 Cites 22 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] Aiming at the problems of stealth and electromagnetic compatibility in complex electromagnetic environments, the present invention proposes a double-band frequency broadband absorber with controllable passband
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0032] In order to make the technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0033] The embodiment of the present invention proposes a double-band frequency broadband absorber with controllable passband. The absorber is composed of a plurality of periodic unit structures arranged in an array. refer to figure 1 , is a structural schematic diagram of a periodic cell structure according to a specific embodiment of the present invention, where k is the incoming wave incident direction. The periodic unit structure includes an electric control switch screen 1 , a periodic resistance layer 2 and a polymethacrylimide (PMI) foam layer 3 . The periodic impedance layer 2 and the electric ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
Aiming at problems of hiding and electromagnetic compatibility in a complex electromagnetic environment, the invention proposes a passband-controllable double-side frequency bandwidth wave-absorbing body. The wave-absorbing body consists of a plurality of periodic unit structures in an array. Each periodic unit structure comprises an electric control switch screen, a periodic impedance layer and afoaming layer, wherein the periodic impedance layer and the electric control switch screen are respectively disposed at the upper and lower sides of the foaming layer. The foaming layer is supportedbetween the electric control switch screen and the periodic impedance layer, and enables the electric control switch screen and the periodic impedance layer to be separated. According to the invention, a feed network at the back of the electric control switch screen is used for controlling the working state of a diode, thereby changing the structure of the electric control switch screen, and achieving the switching between band-pass and total reflection. The wave-absorbing body can achieve the detection of two sides of a working band and the absorbing of an interference signal, achieves the electric control of a transmission window in the working band, does not affect the receiving and transmitting of the signal when the window is opened in a normal environment, and closes the window in the complex electromagnetic environment.
Description
technical field [0001] The invention relates to the technical field of electromagnetic stealth and electromagnetic protection, in particular to a double-band frequency broadband absorber with controllable passband, which is mainly used for the reduction of single / double-station radar cross-sectional area (RCS) and communication systems in complex electromagnetic environments Front-end immunity and protection. Background technique [0002] With its advantages of all-weather, all-time, strong anti-interference ability and high detection accuracy, radar occupies an important position in the detection equipment of modern warfare. Effectively avoid enemy radar detection, reduce the accuracy and completeness of the enemy's information on our military targets, and improve the penetration capabilities of our important military targets such as bombers and fighter jets, which is to ensure that our military tasks can be successfully completed premise. Stealth and strong electromagnet...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H01Q17/00
Inventor 周奇辉刘培国卞立安刘晨曦王轲刘翰青陈更辉
Owner NAT UNIV OF DEFENSE TECH