Compact waveguide bandpass and bandstop filters using negative index material concepts

Abstract

Split ring resonators (SRR) and complementary SRRs (CSRR) are used to design bandstop and bandpass filters in waveguides. These filters are more compact than existing waveguide filters and have no appreciable weight of their own. They have been fabricated and tested showing good agreement between simulations and experiments. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2336–2339, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25482

Experimental Study of Transmission and Reflection Characteristics of a Gradient Array of Metamaterial Split-Ring Resonators

“…In contrast to the uniform array, the gradient structure distinguishes itself by the presence of a wider transmission band [20] below the cutoff frequency of the empty waveguide, a band that extends from Fig. 10 (a).…”

Substrate Integrated Waveguide based dual‐band bandpass filter using split ring resonator and defected ground structure for SFCW Radar applications

“…This structure works as bandstop filter providing high out of band rejection due to negative permeability of the SRRs. 11,12 Later, combination of SIW structure and SRRs etched on the top metal surface forms a bandpass filter. In addition, to achieve the dual-band bandpass filter single split SRR and double split SRRs are etched on the top metal surface.…”

“…In order to achieve the band pass response, SRRs are etched on the top metal plane. This structure works as bandstop filter providing high out of band rejection due to negative permeability of the SRRs . Later, combination of SIW structure and SRRs etched on the top metal surface forms a bandpass filter.…”

Thermally tunable metamaterial based on thermochromic effect

“…In the past decade, the negative refraction phenomenon has attracted tremendous attention, largely being attributed to its remarkable novel physical properties, such as reversal of Snell's law, anomalous Doppler shift, reversed Cerenkov radiation, and the amplification of evanescent wave [1]. By using these properties, scientists studied the possible focusing applications in perfect lens [2], filter [3], sensor [4], invisible cloaking [5], and antenna [6]. A series of artificial composite metamaterials have been developed to achieve negative index materials (NIMs) [2–6].…”

“…By using these properties, scientists studied the possible focusing applications in perfect lens [2], filter [3], sensor [4], invisible cloaking [5], and antenna [6]. A series of artificial composite metamaterials have been developed to achieve negative index materials (NIMs) [2–6].…”