Topic
Reflector (antenna)
About: Reflector (antenna) is a research topic. Over the lifetime, 28730 publications have been published within this topic receiving 212618 citations.
Papers published on a yearly basis
Papers
More filters
Patent•
18 Jul 1984
TL;DR: In this article, a liquid-filled coupling member is connected to the reflector block in a liquidtight manner, and the coupling member can be placed in contact with the skin of the body, and by axial shifting can be adjusted to the correct depth in the body.
Abstract: Apparatus for the non-contact disintegration of concrements present in a body by means of sound shockwaves generated in one focus of at least one liquid-filled reflector formed in a reflector block wherein the reflector exhibits rotary symmetry in the form of a semi-ellipsoid (or in the focal line of a toroidal reflector having a semi-elliptical cross-section configuration) and wherein the reflector focuses the sound shockwaves to a second focus and wherein the apparatus further comprises a liquid-filled coupling member connected to the reflector block in a liquid-tight manner. The liquid-filled coupling member is relatively movable to the reflector and can be placed in contact with the skin of the body. The coupling member is of a construction co-axial with the reflector and by axial shifting can be adjusted to the correct depth in the body, and then, in a second adjustment position, the angular position of the reflector can be adjusted so that the reflector axis is caused to coincide with the concrement to be disintegrated.
54 citations
TL;DR: In this paper, a modulated one-dimensional photonic-crystal (PC) structure is introduced as a back reflector for thin-film solar cells, which consists of two PC parts, each consisting of layers of different thicknesses.
Abstract: A concept of a modulated one-dimensional photonic-crystal (PC) structure is introduced as a back reflector for thin-film solar cells. The structure comprises two PC parts, each consisting of layers of different thicknesses. Using layers of amorphous silicon and amorphous silicon nitride a reflectance close to 100% is achieved over a broad wavelength region (700–1300 nm). Based on this concept, a back reflector was designed for thin-film microcrystalline silicon solar cells, using n-doped amorphous silicon and ZnO:Al. Simulations show that the short-circuit current of the cell with a modulated PC back reflector closely resembles that of a cell with an ideal reflector.
53 citations
Patent•
22 Dec 1988
TL;DR: In this article, the authors present an arrangement for coaction with a distance measuring instrument in the setting out of boundaries or like demarcations, which includes an electronic distance meter, a vertical angle meter, and a horizontal angle meter.
Abstract: The present invention relates to an arrangement for coaction with a distance measuring instrument in the setting out of boundaries or like demarcations. The distance measuring instrument includes an electronic distance meter, a vertical angle meter (18) and a horizontal angle meter (19), a signal processing and computer unit (16, 16') which computes the position of a measuring reflector (12) in relation to the instrument, and an input means (17) for input of desired setting-out data for an area of land into a memory location in the computer prior to a setting-out operation. The distance measuring instrument is held directed towards the measuring reflector and repeatedly makes measurements thereon. With each measuring occasion, the computer unit (16) ascertains whether or not the data obtained lies within a predetermined, acceptable tolerance range in relation to the setting-out data. If the measured data lies outside this range, the computer establishes how the reflector should be moved in order to be located within the tolerance range. An indicator is controlled by the movement signals produced by the computer unit and in response to these signals continuously gives to a person positioned adjacent the reflector a clear, discernible indication of whether the reflector shall be moved, and if so, in which direction or directions, or if the reflector should be left as it is.
53 citations
TL;DR: In this paper, the degradation of the reflector materials by simulating accelerated aging, caused by several ambient parameters and the effect of concentrated radiation, was analyzed in both cooled and uncooled secondary concentrators.
53 citations
TL;DR: An antenna consisting of a flat printed reflector and a feed horn was investigated at mm-wave frequencies in this paper, where the dielectric material is fully metal covered at the side opposite to the feed, whereas the side facing the feed is provided with a number of metallic annular rings forming a Fresnel zone plate.
Abstract: An antenna consisting of a flat printed reflector and a feed horn was investigated at mm-wave frequencies. The dielectric material is fully metal covered at the side opposite to the feed, whereas the side facing the feed is provided with a number of metallic annular rings forming a Fresnel zone plate. >
53 citations