Experimental investigation of mu negative of Bragg gap in one-dimensional composite right/left-handed transmission line

Abstract

Development of solitons in composite right-and left-handed transmission lines periodically loaded with Schottky varactors J. Appl. Phys. 102, 024501 (2007); 10.1063/1.2753568 Direct observation of negative phase velocity and positive group velocity in time domain for composite right/lefthanded transmission linesAn experimental demonstration of mu negative of the Bragg gap in a one-dimensional composite right/left-handed transmission line ͑CRLH-TL͒ is presented. In this structure, a band gap which is independent of the scale length and is insensitive to disorder may be mu negative ͑MNG͒ or epsilon negative, depending on the value of loading lumped-element components. Another band gap, which is induced by Bragg scattering, depends on the scale length and is sensitive to disorder of the structure of transmission line. As far as CRLH-TL is concerned, it is shown that the Bragg gap can be considered as a single negative gap, furthermore, it is always a MNG gap no matter what the gap between left-handed passband and right-handed passband is a mu-negative gap or an epsilon-negative gap.

Tunable omnidirectional multichannel filters based on dual-defective photonic crystals containing negative-index materials

“…It can be seen from figure 6(a) that, when θ increases from 0 • to 30 • , the defect modes inside the zero-n gap remain nearly invariant, whereas the defect modes inside the equivalent transmission lines modes [18], PIMs can be viewed as distributed series inductors and shunt capacitors (right-handed) while NIMs can be viewed as distributed series capacitors and shunt inductors (left-handed). For 1D PIM-NIM periodic structures, the equivalent transmission lines can be viewed as a composite right/left-handed transmission line [19][20][21][22]. By adjusting the circuit parameters of the transmission line, dual-defective PC structures can be realized.…”

A variable refractive index sensor based on epsilon-near-zero spatial selection structure and its potential in biological detection

“…By adjusting the electronic plasma frequency, the epsilon-near-zero (ENZ) frequency can be flexibly tuned. Thanks to the jump phenomenon of transmission characteristics near the ENZ frequency, unparalleled characteristics are displayed, furnishing new ideas for the study of high-transmission devices [27][28][29][30]. As far as we know, most of the research currently stays in the frequency domain, and no scholars have employed the ENZ characteristics to form an effective adjustment to the spatial domain, actually, which is a quite efficient method to achieve angle modulation.…”

Broadband microwave frequency doubler based on left-handed nonlinear transmission lines

“…[13] The performances of composite right/lefthanded nonlinear transmission lines (CRLH NLTLs), such as nonlinearity and bandpass response, can be used to effectively generate harmonics in the radio frequency and millimeter frequency. [4] The CRLH NLTLs have been proved to be a typical planar transmission line implementation of metamaterial, [3,14] compatible with the standard GaAs monolithic microwave integrated circuit (MMIC) technology, Si technology, and printed circuit board designs, [15] which show low-loss and broad-bandwidth performances and widely obtain microwave applications. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] Some attempts have been made to design the MMIC harmonic generator.…”

“…[4] The CRLH NLTLs have been proved to be a typical planar transmission line implementation of metamaterial, [3,14] compatible with the standard GaAs monolithic microwave integrated circuit (MMIC) technology, Si technology, and printed circuit board designs, [15] which show low-loss and broad-bandwidth performances and widely obtain microwave applications. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] Some attempts have been made to design the MMIC harmonic generator. [16,17] When compared with a frequency multiplier based on an FET, [19,20] one based on CRLH NLTLs is self-matched over a much wider frequency range and no additional matching network and filter are needed.…”