Topic
Reflector (antenna)
About: Reflector (antenna) is a research topic. Over the lifetime, 28730 publications have been published within this topic receiving 212618 citations.
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TL;DR: In this paper, the problem of designing a two-reflector system transforming a plane wave front with given in-tensity into an output plane front with prescribed output in- tensity was formulated and solved as the Monge-Kantorovich mass transfer problem.
Abstract: It is shown that the problem of designing a two- reflector system transforming a plane wave front with given in- tensity into an output plane front with prescribed output in- tensity can be formulated and solved as the Monge-Kantorovich mass transfer problem.
76 citations
TL;DR: In this article, a cavity-backed bowtie antenna with stable radiation pattern is proposed, which is differentially fed by a parallel strip line via a transition from a microstrip line.
Abstract: A wide-band unidirectional cavity-backed bowtie antenna with stable radiation patterns is proposed in this paper. It is differentially fed by a parallel strip line via a transition from a microstrip line. The corners of the conventional triangular bowtie dipole are rounded to achieve a larger impedance bandwidth. A circular ring, acting as a special reflector, is placed within the cavity, between the ground plane and the bowtie dipole, for stabilizing the broadside radiation patterns over the whole operating band. Numerical simulations and parametric studies are performed to verify the effectiveness of the ring reflector for radiation pattern improvement when it is electrically close to the bowtie dipole. The final design is fabricated and measured. Measured results indicate that the proposed antenna features an impedance bandwidth of 91.4% for SWR les 2, a 7.3-9.5 dBi broadside gain, a total size of 1.56 times 0.325lambda0 2 (lambda0 is the free-space wavelength at the center frequency) and stable radiation patterns over the whole band.
76 citations
TL;DR: A review of various antenna technologies suitable for satellite communications and applicable to fixed satellite, broadcast satellite, mobile communications, and personal communications services is presented.
Abstract: A review of various antenna technologies suitable for satellite communications and applicable to fixed satellite, broadcast satellite, mobile communications, and personal communications services is presented. Antenna technologies suitable for generating contoured beam and multiple-beam antennas are reviewed. Design considerations for reflector antennas and feed assemblies and antenna performance in terms of coverage gain, sidelobe isolation, and cross-polar isolation are discussed. Current and future technological trends are presented in the above areas.
76 citations
01 Oct 1977
TL;DR: A review of microwave reflector antennas with particular regard to those antennas which produce pencil-beam radiation patterns is provided in this article, where the design of dual-reflector systems is considered in depth and different computer optimisation techniques are reviewed.
Abstract: The paper provides a review of current research on microwave reflector antennas with particular regard to those antennas which produce pencil-beam radiation patterns. After a preliminary examination of microwave antennas of different types attention is focused on circularly symmetric antennas with axially symmetric feed systems. This class of antenna accounts for the largest number of applications which include microwave point-to-point communication, satellite communication, and radio astronomy. The choice of optimum feed is considered in more detail and it is demonstrated that metallic feeds with corrugated walls represent the best choice in most cases. Brief reference is also made to dielectric cone feeds which may find a place in future systems. The design of dual-reflector systems is considered in depth and different computer optimisation techniques are reviewed. These include the latest methods of diffraction optimization in which more than one of the antenna specifications is involved. An example is given where efficiency and VSWR are simultaneously optimized.
76 citations
Patent•
18 Jan 2007
TL;DR: In this paper, a reflector is made by forming a reflective coating on a thin substantially flat glass substrate (the thin glass substrate may or may not be pre-bent prior to the coating being applied thereto), and if the glass substrate in (a) was not prebent, then cold-bending the glass substrates with the reflective coating thereon; and (b) applying a plate or frame member to the thin bent glass substrate with the coating from (a), and/or (b), the plate/frame member (which may be another thicker prebent glass sheet,
Abstract: A reflector (e.g., mirror) for use in a solar collector or the like is provided. In certain example embodiments of this invention, a reflector is made by (a) forming a reflective coating on a thin substantially flat glass substrate (the thin glass substrate may or may not be pre-bent prior to the coating being applied thereto), (b) optionally, if the glass substrate in (a) was not prebent, then cold-bending the glass substrate with the reflective coating thereon; and (c) applying a plate or frame member to the thin bent glass substrate with the coating thereon from (a) and/or (b), the plate or frame member (which may be another thicker pre-bent glass sheet, for example) for maintaining the thin glass substrate and coating thereon in a desired bent orientation in a final product which may be used as parabolic trough or dish type reflector in a concentrating solar power apparatus or the like.
76 citations