Journal ArticleDOI
Compact linear lead/lag metamaterial phase shifters for broadband applications
TLDR
In this article, a compact one-dimensional phase shifter is proposed using alternating sections of negative refractive index (NRI) metamaterials and printed transmission lines (TL).Abstract:
A compact one-dimensional phase shifter is proposed using alternating sections of negative refractive index (NRI) metamaterials and printed transmission lines (TL). The NRI metamaterial sections consist of lumped element capacitors and inductors, arranged in a dual TL (high-pass) configuration. By adjusting the NRI-medium lumped element values, the phase shift can be tailored to a given specification. Periodic analysis is applied to the structure and design equations are presented for the determination of the lumped element parameters for any arbitrary phase shift. To validate the design, various phase shifters are simulated and tested in coplanar waveguide (CPW) technology. It is demonstrated that small variations in the NRI-medium lumped element values can produce positive, negative or 0/spl deg/ phase shifts while maintaining the same short overall length. Thus, the new phase shifter offers some significant advantages over conventional delay lines: it is more compact in size, it exhibits a linear phase response around the design frequency, it can incur a phase lead or lag which is independent of the length of the structure and it exhibits shorter group delays.read more
Citations
More filters
Journal ArticleDOI
Composite right/left-handed transmission line based compact resonant antennas for RF module integration
TL;DR: In this article, several electrically small resonant antennas employing the composite right/left-handed transmission line (CRLH-TL) are presented for integration with portable RF modules.
Journal ArticleDOI
Micromachined tunable metamaterials: a review
TL;DR: In this article, the feasibility of the realization of micromachined tunable metamaterials via structure reconfiguration and the current state of the art in the fabrication technologies of structurally reconfigurable metammaterial elements are reviewed.
Journal ArticleDOI
A compact and low-profile metamaterial ring antenna with vertical polarization
TL;DR: In this article, a low-profile metamaterial ring antenna using two MCU cells is proposed using negative-refractive-index (NRI) microstrip transmission lines (TL) designed to incur a zero insertion phase at the antenna design frequency.
Journal ArticleDOI
A broadband series power divider using zero-degree metamaterial phase-shifting lines
TL;DR: In this paper, a metamaterial 1:4 series power divider that provides equal power split to all four output ports over a large bandwidth is presented, which can be extended to an arbitrary number of output ports.
Journal ArticleDOI
Analysis of directive radiation from a line source in a metamaterial slab with low permittivity
TL;DR: In this paper, the authors investigated the effect of a leaky mode supported by a homogeneous metamaterial medium with a plasma-like dispersive permittivity on the frequency bandwidth and directivity.
References
More filters
Journal ArticleDOI
The Electrodynamics of Substances with Simultaneously Negative Values of ∊ and μ
Journal ArticleDOI
Experimental Verification of a Negative Index of Refraction
TL;DR: These experiments directly confirm the predictions of Maxwell's equations that n is given by the negative square root ofɛ·μ for the frequencies where both the permittivity and the permeability are negative.
Journal ArticleDOI
Composite Medium with Simultaneously Negative Permeability and Permittivity
TL;DR: A composite medium, based on a periodic array of interspaced conducting nonmagnetic split ring resonators and continuous wires, that exhibits a frequency region in the microwave regime with simultaneously negative values of effective permeability and permittivity varepsilon(eff)(omega).
Journal ArticleDOI
Planar negative refractive index media using periodically L-C loaded transmission lines
TL;DR: In this article, the authors proposed an alternate perspective on the design and function of such materials that exploits the well-known L-C distributed network representation of homogeneous dielectrics.
Journal ArticleDOI
An idea for thin subwavelength cavity resonators using metamaterials with negative permittivity and permeability
TL;DR: In this article, it is shown that a slab of metamaterial with negative permittivity and permeability can act as a phase compensator/conjugator and, by combining such a slab with another slab made of a conventional dielectric material, one can, in principle, have a 1D cavity resonator whose dispersion relation may not depend on the sum of thicknesses of the interior materials filling this cavity, but instead it depends on the ratio of these thicknesses.