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Reflector (antenna)

About: Reflector (antenna) is a research topic. Over the lifetime, 28730 publications have been published within this topic receiving 212618 citations.


Papers
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Patent
06 Feb 2001
TL;DR: An electrodeless microwave discharge lamp as mentioned in this paper includes a source of microwave energy, a microwave cavity, a structure configured to transmit the microwave energy from the source to the microwave cavity and a light emitting aperture which extends from a position closely spaced to the bulb to a light transmissive end of the cavity.
Abstract: An electrodeless microwave discharge lamp includes a source of microwave energy, a microwave cavity, a structure configured to transmit the microwave energy from the source to the microwave cavity, a bulb disposed within the microwave cavity, the bulb including a discharge forming fill which emits light when excited by the microwave energy, and a reflector disposed within the microwave cavity, wherein the reflector defines a reflective cavity which encompasses the bulb within its volume and has an inside surface area which is sufficiently less than an inside surface area of the microwave cavity. A portion of the reflector may define a light emitting aperture which extends from a position closely spaced to the bulb to a light transmissive end of the microwave cavity. Preferably, at least a portion of the reflector is spaced from a wall of the microwave cavity. The lamp may be substantially sealed from environmental contamination. The cavity may include a dielectric material is a sufficient amount to require a reduction in the size of the cavity to support the desired resonant mode.

88 citations

Patent
28 Dec 2005
TL;DR: In this article, a dual polarized antenna with at least one dual polarized radiator device comprises a reflector (3) and longitudinal or transverse webs (9, 11) provided at least on its longitudinal side and/or on its transverse side.
Abstract: A dual polarized antenna with at least one dual polarized radiator device comprises a reflector (3) and longitudinal or transverse webs (9, 11) provided at least on its longitudinal side and/or on its transverse side. The improvement is distinguished by the following features: at least one longitudinal web (9) and/or at least two longitudinal webs (9) provided with respect to the radiator device (1, 1′) located in between and/or at least one transverse web (11) and/or at least two transverse webs (11) provided with respect to the radiator device (1, 1′) located in between are positionally changeable directly or at least indirectly by pivoting and/or bending and/or deforming and curving.

88 citations

Journal ArticleDOI
TL;DR: In this paper, a procedure based upon vector analysis methods is outlined for the tracing of optical rays through triple-mirror and tetrahedral prism retrodirective reflectors, which is used to determine the light deviation errors of such reflectors in terms of the errors in the three dihedral angles between the reflecting surfaces.
Abstract: In this study, a procedure based upon vector analysis methods is outlined for the tracing of optical rays through triple-mirror and tetrahedral prism retrodirective reflectors. This procedure is utilized to determine the light deviation errors of such reflectors in terms of the errors in the three dihedral angles between the reflecting surfaces. It is shown that if the dihedral angles of a given reflector are in error by a tolerance amount ±θ, the resulting deviation errors of that reflector will not exceed 3.26θ for a triple mirror or 3.26 Nθ for a tetrahedral prism of refractive index N.Experimental verifications of the theoretical relationships developed in this study are described. The procedures which are used in this verification are applicable to “in-process” and final inspection operations during the manufacture of prismatic retrodirective reflectors of moderate precision.

88 citations

Patent
25 Nov 1998
TL;DR: In a multilayer dielectric reflector, different portions of the surface have different coupling efficiencies for coupling light having a high propagation angle into the multi-layer reflector.
Abstract: In a multilayer dielectric reflector, treating the surface of the reflector selectively increases the amount of light transmitted through the reflector. Various surface treatments can be used to permit light to transmit through the reflector that would otherwise be reflected by the reflector. In one such reflector, different portions of the surface have different coupling efficiencies for coupling light having a high propagation angle into the multilayer reflector. Those portions having higher coupling efficiencies on each side of the reflector have a higher degree of transmission.

88 citations

Journal ArticleDOI
TL;DR: In this article, a method for transferring energy from the top of a tower to the power plant at the bottom of the tower by using a reflector is proposed, and preliminary estimates appear favorable, and it is recommended that detailed systems analysis be performed comparing the tower reflector with the power tower.

88 citations


Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20224
2021567
2020948
20191,159
20181,092
2017977