Publication

Modularity of Locally Resonant Metamaterial Topologies for Electrical Performance, Multipactor Threshold, and Time-Domain Behavior

2026

Abstract

Based on a locally resonant metamaterial (LRM) topology, we investigate how the waveguide width Wfilter and the spacing between resonators a can be used as design knobs to control cutoff frequency, RF volume, group delay, and multipactor (MP)-limited power handling (PH), while keeping the same operating frequency and relative bandwidth. Three two-pole X-band meta-filters (“x”, “y” and “z”) are designed to share f0=10.72GHz,w=8.64% and 20 dB return loss, but with different (Wfilter ,a) pairs. Full-wave simulations show that these variants exhibit distinct group-delay profiles and RF volumes. SPARK3D simulation models predict PH capabilities ranging from 75 W to 97.9 kW, highlighting the strong impact of volume and field distribution. One filter is fabricated in aluminum using Computer Numerical Control (CNC) machining and experimentally validated. The results demonstrate that (Wfilter ,a) provide powerful degrees of freedom to tailor the time-domain response and PH capabilities without changing the electrical specifications (in terms of f0 and relative bandwidth).

Official source

https://infoscience.epfl.ch/entities/publication/6fc9ae57-cda1-41c1-93a9-9fce5d91033b

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2026

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/6fc9ae57-cda1-41c1-93a9-9fce5d91033b

About this result

Related concepts (32)

Frequency domain

In mathematics, physics, electronics, control systems engineering, and statistics, the frequency domain refers to the analysis of mathematical functions or signals with respect to frequency, rather than time. Put simply, a time-domain graph shows how a signal changes over time, whereas a frequency-domain graph shows how the signal is distributed within different frequency bands over a range of frequencies. A frequency-domain representation consists of both the magnitude and the phase of a set of sinusoids (or other basis waveforms) at the frequency components of the signal.

Frequency response

In signal processing and electronics, the frequency response of a system is the quantitative measure of the magnitude and phase of the output as a function of input frequency. The frequency response is widely used in the design and analysis of systems, such as audio and control systems, where they simplify mathematical analysis by converting governing differential equations into algebraic equations.

Impulse response

In signal processing and control theory, the impulse response, or impulse response function (IRF), of a dynamic system is its output when presented with a brief input signal, called an impulse (δ(t)). More generally, an impulse response is the reaction of any dynamic system in response to some external change. In both cases, the impulse response describes the reaction of the system as a function of time (or possibly as a function of some other independent variable that parameterizes the dynamic behavior of the system).

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Modularity of Locally Resonant Metamaterial Topologies for Electrical Performance, Multipactor Threshold, and Time-Domain Behavior

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