摘要:
A lens (300, 500) is disclosed for steering the exit direction (Ω) of an incident electromagnetic wave. The lens comprises a main body (210, 510) of a ferroelectric material with a first main surface (207, 507) and a first transformer (220, 222). The electromagnetic wave enters and exits the lens through the transformer, and the lens comprises means (370, 380) for creating a DC-field in a first direction in the main body. The main body (210, 510) of ferroelectric material comprises a plurality (21011-210NN, 51011-510NN) of slabs of the ferroelectric material, each slab also comprising a first (403, 603) and a second electrode of a conducting material. The means for creating a DC-field can create a gradient DC-field in the first direction using the first and second electrodes, so that the dielectric constant in the main body will also be a gradient in the first direction, thus enabling steering of the existing electromagnetic wave.
摘要:
A dielectric ceramic substrate is obtained exclusively from aluminum oxide, magnesium oxide and titanium oxide, the respective amounts of said magnesium oxide and said titanium oxide being so selected as to represent substantially equivalent molar proportions. The novel substrate is adapted to be used in electronics in the fields of thin layer and thick layer technology, as well for producing microprocessor protection cases, multilayer substrates and the like.