FSS-loaded ultra-wideband angle-stable Salisbury wave absorbing screen
An ultra-broadband and stable technology, applied in the microwave field, can solve the problems of poor stability of the absorbing screen and achieve the effect of improving the stability of the incident angle
Inactive Publication Date: 2018-11-23
XIDIAN UNIV
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Problems solved by technology
[0005] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, and propose an ultra-wideband angle-stabilized Salisbury wave-absorbing screen loaded with FSS, which is used to solve the poor stability of the wave-absorbing screen in the case of electromagnetic waves incident at various angles in the prior art. question
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[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0020] refer to figure 1 , the overall structure includes a first dielectric board 1 , a second dielectric board 2 and a third dielectric board 3 stacked sequentially from top to bottom.
[0021] The upper surface of the first dielectric plate 1 is printed with a high-resistance surface 4, and the high-resistance surface uses a thin film resistor of 377Ω / square, because the resistance value of the thin film resistance is the same as the resistance value of the space wave impedance, so that the electromagnetic wave can be almost without loss. into the absorbing structure.
[0022] The upper surface of the second dielectric plate 2 is printed with M×N reflective units 5 periodically arranged, wherein, M=N=10, and the distance between each reflective unit is 0.4 mm, refer to figure 2 , the reflection unit 5 adopts a back-shaped struct...
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The invention provides an FSS-loaded ultra-wideband angle-stable Salisbury wave absorbing screen. The FSS-loaded ultra-wideband angle-stable Salisbury wave absorbing screen is used for solving the technical problem that in the prior art, under the condition of incidence of various angles of electromagnetic waves, a wave absorbing screen is poor in stability. The FSS-loaded ultra-wideband angle-stable Salisbury wave absorbing screen comprises three layers of dielectric plates which are sequentially stacked from top to bottom; the upper surface of the first layer of dielectric plate is printed with a high-resistance surface; the upper surface of the second layer of dielectric plate is printed with M*N reflection units which are periodically arranged; the lower surface of the third layer of dielectric plate is printed with a metal floor; the reflection units adopt concentric-square-shaped structures constituted by first square ring patches and second square ring patches embedded in the first square ring patches; a rectangular gap is formed in each edge of the first square ring patches and the second square ring patches, and first patch resistors and second patch resistors are loaded on the gaps correspondingly; and a plurality of pairs or one or more pairs of metal branches which are symmetrical with respect to the first patch resistors and the second patch resistors are arrangedon the inner sides or the outer sides of the edges of the first square ring patches and the second square ring patches correspondingly.
Description
technical field [0001] The invention belongs to the field of microwave technology, and relates to an ultra-wideband angle-stabilized Salisbury wave-absorbing screen loaded with FSS, which can be applied to electromagnetic protection fields such as electromagnetic interference and electromagnetic radiation. Background technique [0002] In 1952, W.W.Salisbury of the MIT Radiation Laboratory invented the physical absorbing structure named after himself, and then Jaumann absorbers and circuit analog absorbers appeared one after another. At present, researchers are mostly studying the Salisbury wave-absorbing screen. The Salisbury wave-absorbing screen is mainly composed of a high-resistance surface, a dielectric, and a metal floor. Its thickness is roughly a quarter of the wavelength corresponding to the center frequency. Salisbury absorbing screen has the characteristics of simple structure and narrow absorbing bandwidth. [0003] Frequency selective surface (FSS) is a two-di...
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IPC IPC(8): H01Q17/00H01Q15/00
CPCH01Q15/0013H01Q17/00
Inventor 相征冯利晶任鹏李毅
Owner XIDIAN UNIV