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Updated: Jan 8, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

高選択性透過パスバンド2つと広帯域RCS低減を実現する周波数選択的バイナリメタサーフェス

Yuchen Yan, Weiwei Wu, Yuhong Ma

|December 19, 2025

Abstract:

The integration of multiband transmission channels with broadband radar cross-section (RCS) reduction is a pivotal yet challenging goal for advanced stealth radomes. This paper proposes a frequency-selective binary metasurface (FSBM) that synergizes a binary coding metasurface with a frequency-selective surface (FSS) to simultaneously achieve high-selectivity dual-passband transmission and wideband RCS suppression. The top-layer binary metasurface, composed of two artificial magnetic conductors (AMC) units arranged in an optimized sequence, facilitates destructive interference for broadband backscattering suppression. The bottom-layer FSS, functioning as a second-order dual-band filter with aperture-coupled resonators, provides the desired passbands and acts as a near-perfect electric conductor (PEC) reflector in the stopband to enable AMC operation. A prototype is fabricated and measured, demonstrating two transmission bands at 5.14 GHz and 7.61 GHz with low insertion loss (IL) and steep roll-off, alongside a fractional bandwidth exceeding 76.3% for -10 dB RCS reduction. This work presents a viable path forward for developing low-scattering platforms for multiband radar and communication systems.

キーワード:

メタサーフェス周波数選択性レーダー断面積ステルスレドームデュアルバンドバイナリコーディング

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関連する概念動画

Passive Filters

Passive Filters

Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...

Parallel Resonance

Parallel Resonance

The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:

Bandpass Sampling

Bandpass Sampling

In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....

Active Filters

Active Filters

Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:

Design Example

Design Example

The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...