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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
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Proceedings ArticleDOI
09 Jul 2001
TL;DR: In this article, two dipole antennas are set in a borehole as receivers, and a transmitter is located 0.9 m apart from the borehole, and the 2-D MUSIC algorithm modified for array type radar in a Borehole is applied to the measured data to estimate the location.
Abstract: Dipole array antennas with optical modulators are applied to directional borehole radar. Experimental results of 2-D source location are shown. In the experiments, two dipole antennas are set in a borehole as receivers, and a transmitter is located 0.9 m apart from the borehole. The 2-D MUSIC algorithm modified for array type radar in a borehole is applied to the measured data to estimate the location. Method of moment was used to model the antenna.

14 citations

Proceedings Article
12 Apr 2010
TL;DR: In this article, the authors used a low loss thermoplastic polymer substrate material ER182 for the design and verification of high gain microstrip patch antennas at the mm-wave.
Abstract: Electromagnetic waves are severely attenuated at the 60 GHz band and therefore high gain antennas are mandatory to assure medium as well as long distance communication. Efficient antennas like dish and waveguide antennas might be used for outdoor applications, however, their big size and/or high cost is an obstacle for cost-efficient and low profile indoor systems. The investigation of highly directional microstrip patch antennas at the mm-wave is done employing the new low loss thermoplastic polymer substrate material ER182. The antennas are designed and solved using a frequency domain solver. Then, the results are numerically verified by re-solving the designed antennas with a time domain solver that yields a good agreement. In addition, a prototype set of 7 different antennas, starting with a single patch antenna and up to a 32×32 planar antenna array, are fabricated and measured. The measurements show a gain of up to 23 dBi, an impedance bandwidth that exceeds 3 GHz, and a realizable HPBW of 2°. The use of ER182 substrate material enhances the antenna efficiency, compared to other well known materials, however the realization of high gain antennas is still very limited compared to waveguide antennas.

14 citations

Journal ArticleDOI
TL;DR: Directivity curves of a uniform broadside array of isotropic sources were shown to illustrate that gain increases almost linearly with aperture size until an optimum source spacing of approximately 0.9 λ is reached.
Abstract: Directivity curves, of a uniform broadside array of isotropic sources, are shown to illustrate that gain increases almost linearly with aperture size until an optimum source spacing of approximately 0.9 \lambda is reached.

14 citations

Journal ArticleDOI
TL;DR: In this article, an experimental comer reflector was erected at the Table Mesa antenna range near Boulder, and the aperture angle of this antenna was made adjustable to any value between 20 and 180 degrees.
Abstract: An experimental comer reflector was erected at the Table Mesa antenna range near Boulder. The aperture angle of this antenna was made adjustable to any value between 20 and 180 degrees. The widths and lengths of the reflecting surfaces were each adjustable from 0.4 to 5.0 wavelengths. Measurements of gain were made for numerous combinations of lengths and widths of reflecting surfaces. These measurements were made with a half-wave dipole in the first, second and third maximum positions. The aperture angle was adjusted to maximize the gain. The principal results are presented in the form of contours of constant gain plotted for a range of widths and lengths of reflecting surfaces from 0.4 to 5.0 wavelengths. These graphs should be useful to a designer of corner-reflector antennas.

14 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20238
202222
20211
20209
20199
201816