Mechanically Tunable Wire Medium Metamaterial in the Millimeter Wave Band

Abstract

Abstract-The paper is devoted to experimental and theoretical study of spectra zone characteristics of the wire medium metamaterial with mechanically tunable unit cell. We experimentally demonstrated the effective control possibility of the spectral characteristics of wire medium metamaterial by varying its elementary unit-cell geometry. We established conditions under which the experimental implementation of the wire medium metamaterial at microwaves possesses the properties of a plasma-like medium and the properties band gap structure. A good agreement between the experiment and theory is demonstrated.

Defect Mode Tuning in Two-Dimensional Band-Gap Wire Structure in the Millimeter Waveband

“…This method is well applicable to recording and analyzing the spatial distribution of the EM field. According to [14], the amplitude distribution of the EM field is recorded by changing the transmission spectra, when a probe is introduced into the required part of the space within the wire structure [19]. To detect the spatial field distribution, we applied a well-known perturbation technique.…”

“…In the wire structure, TE modes propagate along the OY -axis (15-23 GHz) under the conditions λ/b = 3 as shown in [14]. Above this value, part of the wave will be reflected, i.e., a stationary wave is formed.…”

“…In our case, we consider the microwave analog of PC (2D wire mesh photonic crystal [5,15]) formed by the periodic wire array with rectangular unit cell [14,15]. It is necessary to note that such metamaterial could be attributed also to plasma-like medium, under conditions when wire size and periods are much smaller than the wavelength [16,17].…”

Defect modes in the spectrum of the wire medium in the microwave range

“…Данное явление подробно описано в работе [19]. В настоящей работе экспе-риментальные исследования проводились в рабо-чем частотном диапазоне 22…40 ГГц, в котором наблюдается ЗЗ-1, где рассматриваемому нами АПМ свойственны электромагнитные свойства ФК.…”

“…1). Векторный анализатор цепей Agilent PNA-L Network Analyzer (N5230А) генерирует электромагнитную волну, которая проходит через всю систему [19]. Вектор электрического поля E  направлен вдоль прово-лочек.…”