Topic
Reflective array antenna
About: Reflective array antenna is a research topic. Over the lifetime, 4366 publications have been published within this topic receiving 57884 citations.
Papers published on a yearly basis
Papers
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09 Jun 2006TL;DR: In this paper, a front-end device for a phased array system is described, which includes an array of horn antennas, a first set of transmission lines coupled to the horn antenna array for a first polarization, a second set of transmissions coupled to a second polarization orthogonal to the first polarization and a plurality of L-shaped excitation elements.
Abstract: Disclosed herein is a front-end device for a phased array system. The front-end device includes an array of horn antennas, a first set of transmission lines coupled to the horn antenna array for a first polarization, a second set of transmission lines coupled to the horn antenna array for a second polarization orthogonal to the first polarization, and a plurality of L-shaped excitation elements. Each L-shaped excitation element of the plurality of L-shaped excitation elements couples a transmission line from each of the first and second sets of transmission lines to a respective horn antenna of the horn antenna array.
198 citations
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06 Mar 2012TL;DR: General antenna concepts, partly including some system aspects, as well as three realized antenna configurations will be described in detail in this contribution.
Abstract: Automotive radars are on the market since 1999, both in the frequency range around 24 GHz as well as 76.5 GHz, with a new frequency band ranging from 77 to 81 GHz intended for medium and short-range sensors. The choice and design of the respective sensor antennas are determined by the requirement for high gain and low loss combined with small size and depth for vehicle integration, the challenges by the millimeter-wave frequency range, and a great cost pressure for this commercial application. Consequently, planar antennas are dominating in the lower frequency range, while lens and reflector antennas had been the first choice at 76.5 GHz, partly in folded configurations. With increasing requirements towards a much more detailed observation of the scenery in front or around the vehicle, multibeam antennas or scanning antennas have been designed, and solutions based on (digital) beamforming with a number of integrated antennas are in use or under development. General antenna concepts, partly including some system aspects, as well as three realized antenna configurations will be described in detail in this contribution.
198 citations
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TL;DR: The design of antennas consisting of two strip dipoles the arms of which are printed on opposite sides of an electrically thin dielectric substrate and connected through a parallel stripline is presented, allowing them to be readily manufactured as printed circuits.
Abstract: The design of antennas consisting of two strip dipoles the arms of which are printed on opposite sides of an electrically thin dielectric substrate and connected through a parallel stripline is presented. The antennas are designed to have broad-band or dual-band capability suitable for application in base stations of wireless communication systems. An important advantage of these antennas is their simple structure, allowing them to be readily manufactured as printed circuits. Broad-band antennas with bandwidths greater than 30% for VSWR /spl les/1.5 operating near 2.0 GHz and dual-frequency antennas operating at 0.9 GHz/1.5 GHz and 0.9 GHz/1.8 GHz bands are presented.
191 citations
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01 Aug 1980TL;DR: In this paper, a method for doubling the bandwidth of rectangular microstrip patch antennas by locating capacitively excited λ m ��/4 short circuit parasitic elements at their radiating edges is described.
Abstract: A method is described of doubling the bandwidth of rectangular microstrip patch antennas by locating capacitively excited λ
m
/4 short circuit parasitic elements at their radiating edges. The antenna characteristics are explained in terms of an antiphase mode of a pair of coupled resonators, and it is shown that the bandwidth improvement is independent of the coupling capacitance. Experimental results are presented for both linearly and circularly polarised antennas which support the theoretical predictions.
183 citations
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16 Nov 2003
TL;DR: In this paper, a method for creating frequency notches in an otherwise ultra-wideband (UWB) antenna element is described, by deliberately introducing a narrow band resonant structure, an antenna may be made insensitive to particular frequencies.
Abstract: This paper describes a method for creating frequency notches in an otherwise ultra-wideband (UWB) antenna element. By deliberately introducing a narrow band resonant structure, an antenna may be made insensitive to particular frequencies. This technique is useful for creating UWB antennas with narrow frequency notches, or for creating multi-band antennas.
183 citations