Theoretical Study and Experimental Realization of a Low-Loss Metamaterial Operating at the Millimeter-Wave Regime: Demonstrations of Flat- and Prism-Shaped Samples

Abstract

Abstract-We designed a low-loss double-negative composite metamaterial that operates at the millimeter-wave regime. A negative passband with a peak transmission value of -2.7 dB was obtained experimentally at 100 GHz. We performed transmissionbased qualitative effective medium theory analysis numerically and experimentally to prove the double-negative nature of the metamaterial. These results were supported by the standard retrieval analysis method and the study was extended by reporting the fractional bandwidth and loss of the metamaterial as the number of layers in the propagation direction increased. We numerically calculated 2-D field map and experimentally confirmed far-field radiation response of horn antenna and metamaterial lens composite. Finally, we demonstrated that the effective index of the metamaterial was negative by performing far-field angular scanning measurements for a metamaterial prism. We simulated the prism by using the Drude-Lorentz model and obtained the scattered field map in two dimensions at millimeter-wavelengths.Index Terms-Metamaterials, metaprism, millimeter wave, negative refraction.

Dual-Band Polarization Independent Metamaterial Absorber Based on Omega Resoanator and Octa-Star Strip Configuration

“…For the second resonance, the related parameters are ∆f = 0.182, f 0 = 5.64 GHz, and FBW ≈ 3.23% from the simulation and ∆f = 0.31, f 0 = 5.6 GHz, and FBW ≈ 5.53% from the experiment. These computations signify that the proposed structure has good quality character [34][35][36]. Moreover, reflection (correspondingly absorption) performances of Ω resonator and OSS structure separately are shown in the right side of Figure 3.…”

“…After that, the first experimental study on MTMs at microwave frequencies was performed by Smith and Kroll in 2000 [18]. Since then, MTM topology continues to be of great interest and practical importance owing to a variety of potential applications due to the common/special needs in science and technology [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. In this sense, many research groups have studied the EM response of MTMs in order to understand their fundamental features and investigated their variations to be used in many applications such as lenses, antennas, sensors, absorbers, and so on.…”

Photonic magnetic metamaterial basics

“…Artificially constructed periodic metamaterials that exhibit unusual properties such as simultaneous negative permeability and negative permittivity that are not present in nature have attracted considerable interest [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. The first feasible example of negative permeability medium was composed of microstructures built from nonmagnetic conducting sheets [1].…”

“…The unit cell geometry can be optimized to miniaturize metamaterial elements yielding small and strongly resonant inclusions [4,14]. Negative index of metamaterials can be tested by measuring flat and prism shaped metamaterial media with oblique and normal incidence transmission measurements respectively [5]. Planar double negative metamaterials were also demonstrated for normal incidence and oblique incidence at the millimeter-wave frequencies [6,15].…”

“…Metamaterials are shown to operate at microwave [10], millimeter-wave [5,6], THz [7], mid-IR [9], IR and visible [8] regimes of electromagnetic spectrum. Utilization of metamaterials at the optical regime could lead to high performance and novel photonic devices in information and communication technologies (ICT).…”