Reflective/Absorptive Surface and Design Method for Controlling Electrical Characteristics of Terminated Filter Circuit
A filter circuit and absorption surface technology, which is applied to the reflection/absorption surface of the terminal filter circuit to control the electrical characteristics and its design field, can solve the problems of steepness, difficult application, and high overall structural profile, and achieve the effect of increasing the degree of freedom
Active Publication Date: 2022-06-24
NANJING UNIV OF SCI & TECH
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Problems solved by technology
Moreover, in the frequency selective surface structure, in order to obtain steep out-of-band suppression characteristics, it is necessary to use a multi-layer structure, which makes the overall structure section higher and is not easy to apply
Method used
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[0055] This embodiment uses a dual-polarization, polarization angle-independent reflection / absorption surface that uses a termination filter circuit to control electrical characteristics as an example. The surface has a reflection frequency band and an absorption frequency band. When the incident wave is a line with any polarization angle When polarized waves, reflection / absorption effects can be achieved. When this surface is used as an antenna floor, the out-of-band radar cross section (RCS) can be effectively reduced. Below we combine figure 1 for further details.
[0056] Exemplarily, the receiving antenna array and the filter circuit used in this embodiment are only one of the present invention, and the reflection / absorption surfaces of other structures realized by using the principles of the present invention are all within the protection scope of this patent. For example, the receiving antenna array can use a magnetoelectric dipole antenna, and the filtering circuit c...
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Abstract
The invention discloses a dual-polarized reflective / absorbing surface controlled by a terminal filter circuit and a design method thereof. The surface includes: a dual-polarized receiving antenna array, a filter circuit and an absorbing resistor. The receiving antenna array It is used to transmit the received electromagnetic wave signal to the filter circuit, and the filter circuit is used to realize the adjustment and control of the amplitude, phase and frequency characteristics of the surface, and the absorbing resistor is connected to the terminal of the filter circuit. The present invention can be used as a dual-polarized absorbing frequency reflective surface. The reflective / absorbing surface has a reflection frequency band and one or several absorption frequency bands. When the incident wave is a linearly polarized wave with any polarization angle, reflection can be realized / Absorptive effect, which can effectively reduce the out-of-band radar cross section (RCS) when a reflective / absorbing surface is used as an antenna floor.
Description
technical field [0001] The invention belongs to the field of frequency reflection / absorption surfaces, in particular to a reflection / absorption surface for controlling electrical characteristics of a termination filter circuit and a design method thereof. Background technique [0002] A frequency selective surface is a one-dimensional or two-dimensional infinite periodic array composed of independent units, which is essentially a spatial filter circuit, which is used to select the frequency of transmission and reflection of incident electromagnetic waves to achieve band-pass or band-stop filtering characteristics. . With the development of wireless communication systems, frequency selective surfaces have important applications in spatial filtering, partially reflective surfaces, and radar stealth. [0003] In recent years, reducing radar out-of-band scattering by using absorbable frequency selective surfaces has become an effective method to reduce RCS. In the design of th...
Claims
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IPC IPC(8): H01Q15/00H01Q21/06
CPCH01Q15/0046H01Q21/061
Inventor 吴文王兵宗志园于银华郭欣司马博羽汪敏方大纲
Owner NANJING UNIV OF SCI & TECH