Omnidirectional acoustic absorber with a porous core and a metamaterial matching layer

Omnidirectional acoustic absorber with a porous core and a metamaterial matching layera)

Articles you may be interested in Analysis of feedback control of piezoelectric transducersa) Sound absorption of a finite micro-perforated panel backed by a shunted loudspeakera) Thermal boundary layer effects on the acoustical impedance of enclosures and consequences for acoustical sensing devicesa) Modal decomposition method for acoustic impedance testing in square ductsa) Near field acousti...

An Omnidirectional Polarization Detector Based on a Metamaterial Absorber

The theory, design, simulation, fabrication, and performance of an omnidirectional polarization detector (PD) with two resonances located in the X and Ka ranges based on a metamaterial absorber (MMA) are presented in this paper. The sandwich structure of PD is composed of 0.1 μm periodic "I" shaped patches on the metasurface, a dielectric of 200 μm FR-4 on the interlayer, and a 0.3 μm copper fi...

Single-Layer Metamaterial Absorber for Radar Application

A Planar, Layered Ultra-wideband Metamaterial Absorber for Microwave Frequencies

In this paper, an ultra-wideband metamaterial absorber is designed and simulated. The proposed absorber is planar and low profile. It is made of a copper sheet coated with two dielectric layers. Each unit cell of the metamaterial structure is composed of multiple metallic split rings, which are patterned on the top and middle boundaries of the dielectrics. The designed absorber utilizes differe...

A Six-Fold Symmetric Metamaterial Absorber

A novel microwave metamaterial absorber design is introduced along with its manufacturing and characterization. Significant results considering both bandwidth and angular stability are achieved. Parametric analysis and simplified equivalent circuit are provided to give an insight on the key elements influencing the absorber performance. In addition, the constitutive parameters of the effective ...