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The experimental demonstration of the insensitivity to losses and size of the composite right/left- handed (CRLH) zeroth order resonator (ZOR) is reported for the first time. The prototypes used for this demonstration are implemented in metal-insulator-metal (MIM) technology, which exhibits simplicity of design, high compactness and immunity to spurious resonances.
A novel extended composite right/left-handed (E-CRLH) transmission line (TL) metamaterial structure, constituted by the combination of the conventional CRLH (C- CRLH) and the recently introduced dual CRLH (D-CRLH) prototypes, is proposed. This E-CRLH metamaterial is characterized by eight LC parameters (four C-CRLH and four D-CRLH parameters), which allow unprecedented diversity in the manipulation...
In this paper, a free space power combining oscillator antenna array using a metamaterial based injection locking coupling network is described and demonstrated. The unique metamaterial series coupling network utilizes the infinite wavelength phenomenon which allows it to support an infinitely long wave at a non-zero frequency. It is demonstrated that equal phase/amplitude oscillator synchronization...
This paper presents an alternative, new approach to the design of power divider based on composite right/left-handed transmission line (CRLH TL), where stopband propagation characteristics are employed. Two theoretical methods, namely, use of Floquet theorem analyzing CRLH TL of infinite length and scattering analyses of CRLH TL of finite length, lead to nearly identical complex modes and characteristics...
Based on the composite right/left-handed transmission line (CRLH-TL) theory, a novel unit of planar distributed structure with double negative material (DNM) is proposed. The present unit cell implemented with microstrip structure has composite structure on single-layer but not two layers as did before. By using interdigital capacitor instead of the former mushroom structure with caps, the structure...
This paper aims to give a unified characterization of various periodically loaded transmission line media/materials with infinite extent on coplanar waveguide (CPW) in terms of two fundamental per-unit-length (PUL) transmission parameters, i.e., frequency-dispersive/complex characteristic impedance and propagation constant. Regardless of varied periodic loading elements, a self-calibrated method of...
Slotted composite right/left-handed (CRLH) strip lines (SLs) are proposed for leaky wave antenna (LWA) applications in which their radiation patterns are required to be controlled with beam steering function. The dependence of the leakage power from a slot on one of the ground planes of the CRLH SL is studied numerically for a balanced slotted CRLH SL and a possibility of achieving the optimum slot...
In this paper we investigate the propagation behavior of a square shaped planar meta-material guiding structure comprised of left-handed and right handed square unit cells each of the same size and arranged in a checker-board tessellation. The size of the planar structure is 19 cells by 19 cells and each cell is 8 mm by 8 mm. At 1 GHz, the left-handed unit cells have an insertion phase of 11deg and...
In this paper, a novel compact microstrip bandstop filter using complimentary split ring resonators (CSRRs) is proposed. The bandstop is produced by an array of CSRRs etched on the center line of a microstrip. This behavior is due to the presence of negative effective permittivity and positive permeability near resonant frequency which prevent the wave propagation. We have achieved controllable resonance...
A quasi-TEM approximation of the coupled mode theory generalized to conventional/CRLH-metamaterial contradirectional coupled-line couplers is presented and demonstrated experimentally.
This paper presents a left-handed material microstrip transmission line on Si CMOS chip using wafer level package (WLP) process. The left- handed materials (LHM) of the novel structure extend from 0.01 GHz to 20 GHz, performing in much wider bandwidth than those reported so far. Composite right/left-handed material (CRLH TL) microstrip line consists of metal-insulator-metal (MIM) capacitors, microstrip...
An 8-element planar composite right/left-handed (CRLH) leaky wave antenna (LWA) array fed by an 8 times 8 Butler matrix feeding network is designed and its 2-D beam steering characteristics are demonstrated numerically. The 2-D beam steering is expected in one plane by changing frequency and also in the other orthogonal plane by switching the input port of the BM. The CRLH LWA element and the BM are...
In this paper, we describe a novel microwave oscillator incorporating a CPW-based split ring resonator (SRR) as a resonant component of the circuit. The high-quality (Q) factor and spurious-free SRR contribute to phase noise reduction as well as the harmonic tuning of the oscillator circuit in a very small chip area. The fabricated 5.5-GHz oscillator showed an output power of 2.774 dBm with a second...
Left-handed wave propagation in metamaterials comprised of an array of metallic rods thinned at their centers is discussed. It is shown that the rod media support left-handed waves when the density of the rods is large, whereas they support right-handed waves and work as artificial dielectrics when the density is small. The wave propagation of the media is discussed in terms of dispersion relation...
Transmission line metamaterials on CPW with unsymmetrical unit cells, loaded by series- C and shunt-L elements, are studied to demonstrate the distinctive characteristics of incident and reflected guided-waves. Two sets of per-unit-length transmission parameters, i.e., propagation constant and Bloch-wave impedance, are numerically extracted using our self-calibrated method of moments and they are...
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