Publication

Compact Tunable (Generic) Sub-λ Meta-Filter for X/Ku Band: Control and Reconfigurability of Central Frequency, Bandwidth and Order

2026

Abstract

A compact tunable X/Ku-band waveguide meta-filter based on locally resonant metamaterials (LRMs) is presented. The structure uses a composite pin–pipe waveguide in which the heights and number of resonant pins are mechanically adjusted to jointly control the central frequency f0, bandwidth w, and filter order n. True order reconfigurability from three to two to one pole is obtained on the same hardware, while a meta-port provides independent tuning of the external quality factor Qe for proper matching in each state. Full-wave simulations and measurements validate the concept and demonstrate one-octave tuning in the single-resonator case with low insertion loss.

Official source

https://infoscience.epfl.ch/entities/publication/cd0319ff-4fa5-413b-ad69-cf41b443c804

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2026

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/cd0319ff-4fa5-413b-ad69-cf41b443c804

About this result

Related concepts (32)

Acoustic metamaterial

An acoustic metamaterial, sonic crystal, or phononic crystal is a material designed to control, direct, and manipulate sound waves or phonons in gases, liquids, and solids (crystal lattices). Sound wave control is accomplished through manipulating parameters such as the bulk modulus β, density ρ, and chirality. They can be engineered to either transmit, or trap and amplify sound waves at certain frequencies. In the latter case, the material is an acoustic resonator.

Waveguide filter

A waveguide filter is an electronic filter constructed with waveguide technology. Waveguides are hollow metal conduits inside which an electromagnetic wave may be transmitted. Filters are devices used to allow signals at some frequencies to pass (the passband), while others are rejected (the stopband). Filters are a basic component of electronic engineering designs and have numerous applications. These include selection of signals and limitation of noise.

Rainbow matching

In the mathematical discipline of graph theory, a rainbow matching in an edge-colored graph is a matching in which all the edges have distinct colors. Given an edge-colored graph G = (V,E), a rainbow matching M in G is a set of pairwise non-adjacent edges, that is, no two edges share a common vertex, such that all the edges in the set have distinct colors. A maximum rainbow matching is a rainbow matching that contains the largest possible number of edges. Rainbow matchings are of particular interest given their connection to transversals of Latin squares.