Wide stopband compact microstrip lowpass filter using circular ring resonator and split ring resonators

2011 ◽  
Vol 53 (9) ◽  
pp. 1961-1964 ◽  
Author(s):  
Mahdi Naghshvarian Jahromi
Keyword(s):  
Ring Resonator ◽  
Circular Ring ◽  
Ring Resonators ◽  
Lowpass Filter ◽  
Split Ring ◽  
Split Ring Resonators

scholarly journals Coupling Schemes in Terahertz Planar Metamaterials

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Dibakar Roy Chowdhury ◽  
Ranjan Singh ◽  
Antoinette J. Taylor ◽  
Hou-Tong Chen ◽  
Weili Zhang ◽  
...  
Keyword(s):  
Resonance Line ◽  
Ring Resonator ◽  
Near Field ◽  
Split Ring Resonator ◽  
Higher Order ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Sensing Applications ◽  
Lattice Mode

We present a review of the different coupling schemes in a planar array of terahertz metamaterials. The gap-to-gap near-field capacitive coupling between split-ring resonators in a unit cell leads to either blue shift or red shift of the fundamental inductive-capacitive (LC) resonance, depending on the position of the split gap. The inductive coupling is enhanced by decreasing the inter resonator distance resulting in strong blue shifts of theLCresonance. We observe theLCresonance tuning only when the split-ring resonators are in close proximity of each other; otherwise, they appear to be uncoupled. Conversely, the higher-order resonances are sensitive to the smallest change in the inter particle distance or split-ring resonator orientation and undergo tremendous resonance line reshaping giving rise to a sharp subradiant resonance mode which produces hot spots useful for sensing applications. Most of the coupling schemes in a metamaterial are based on a near-field effect, though there also exists a mechanism to couple the resonators through the excitation of lowest-order lattice mode which facilitates the long-range radiative or diffractive coupling in the split-ring resonator plane leading to resonance line narrowing of the fundamental as well as the higher order resonance modes.

scholarly journals Effects of Microstructure Variations on Macroscopic Terahertz Metafilm Properties

2007 ◽  
Vol 2007 ◽  
pp. 1-10 ◽  
Author(s):  
John F. O'Hara ◽  
Evgenya Smirnova ◽  
Abul K. Azad ◽  
Hou-Tong Chen ◽  
Antoinette J. Taylor
Keyword(s):  
Ring Resonator ◽  
Single Layer ◽  
Split Ring Resonator ◽  
Ring Resonators ◽  
Terahertz Frequency ◽  
Structural Components ◽  
Frequency Range ◽  
Terahertz Frequency Range ◽  
Split Ring ◽  
Split Ring Resonators

The properties of planar, single-layer metamaterials, or metafilms, are studied by varying the structural components of the split-ring resonators used to comprise the overall medium. Measurements and simulations reveal how minor design variations in split-ring resonator structures can result in significant changes in the macroscopic properties of the metafilm. A transmission-line/circuit model is also used to clarify some of the behavior and design limitations of the metafilms. Though our results are illustrated in the terahertz frequency range, the work has broader implications, particularly with respect to filtering, modulation, and switching devices.

Coupled ring resonator for microwave characterization of dielectric materials

2012 ◽  
Vol 4 (2) ◽  
pp. 241-246 ◽  
Author(s):  
Mahima Kapoor ◽  
K. S. Daya ◽  
G. S. Tyagi
Keyword(s):  
Dielectric Constant ◽  
Spirulina Platensis ◽  
Ring Resonator ◽  
Dielectric Materials ◽  
Split Ring Resonator ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Closed Ring

In this paper characterization of dielectric materials in liquid and powder phase using concentric closed and split ring resonators of length λ, λ/2, and λ/4 is reported. Experimental results have been validated by simulations and theoretically modeling. Sensitivity of the resonator with closed rings was maximum. Experimentally extracted values of dielectric constant of ferrite ranged from 14.05 to 15.1 with closed ring resonators and from 13.6 to 14.02 with split ring resonator, respectively. For spirulina platensis the dielectric constant was lying in the range 1.78–1.93 and 1.74–2.04 with closed ring and split ring resonators, respectively. The values extracted experimentally are in good agreement with simulation and theoretically found values. However, the values obtained from closed ring resonator were in agreement with the dielectric constant values of ferrite and spirulina platensis.

scholarly journals Modeling of Split Ring Resonators loaded microstrip line with different orientations

2015 ◽  
Vol 5 (6) ◽  
pp. 1363
Author(s):  
Rajni Rajni ◽  
Gurwinder Singh ◽  
Anupma Marwaha
Keyword(s):  
Reflection Coefficient ◽  
Microstrip Line ◽  
Ring Resonator ◽  
Magnetic Interaction ◽  
Split Ring Resonator ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
High Frequency Structure Simulator ◽  
Equivalent Circuit Parameters

<p>This paper presents the different circuit approaches of the electric and magnetic interaction of Single Split Ring Resonator (SRR) loaded microstrip line. We loaded the microstrip line with planar square split ring resonator in different configurations and orientations. The modeling behavior of metamaterials-based microstrip lines loaded with single and two-mirrored split ring resonators is analyzed numerically in two orientations (with gap of SRR parallel and perpendicular to the line). The full wave simulations are performed for the single and two-mirrored split ring resonators loaded microstrip inside a waveguide with ‘High Frequency Structure Simulator’ software.<strong> </strong>The equivalent circuit parameters are obtained for the single split ring resonator loaded with microstrip line with the gap parallel and near to the line from transmission line theory  that make use of just the resonance frequency and minimum of the reflection coefficient.<strong> </strong>The simulation of different orientations of split ring resonator gives better reflection coefficient and wider frequency.</p>

Sign in / Sign up

Export Citation Format

Share Document