Results 241 to 250 of about 59,812 (299)

Weather Forecasting Radar Antenna: An Application of Active Microstrip Antennas

22nd European Microwave Conference, 1992, 1992
In this paper we propose an original antenna structure which may be used in weather forecasting radars. It is composed of microstrip radiating elements, active circuits and microstrip power splitters. This antenna may take place of the heavy and expensive existing parabolic structures which are used in satellite communications or radar applications. We'
Razban, T., Robert, B.
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Pressurized antennas for space radars

Sensor Systems for the 80's Conference, 1980
The low weight and packaged volume of inflatables relative to mechanical systems has long been known. A 700-meter diameter inflated reflector could be carried in a single shuttle payload. Surface tolerances were demonstrated resulting in acceptable gains for microwave wavelengths greater than 1 cm.
M. THOMAS, G. FRIESE
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76GHz Radar Antenna Alignment System

2000 30th European Microwave Conference, 2000
In this paper we describe a system that can be used to accurately align automotive radars to a desired reference on an automobile. The system uses a 76 GHz low-cost amplitude-only interferometer to achieve alignment accuracy to within ±0.25 degrees. A detailed description of the system and its performance is given, and a comparison of the system to ...
M. Grace, R. Abou-Jaoude, K. Noujeim, D. Bradley   +3 more
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Antenna for 3D radar demonstrator

2015 European Radar Conference (EuRAD), 2015
The paper describes an antenna demonstrator for 3D radar at s-band. It is composed as monopulse two-dimensional antenna array with dipoles printed on a dielectric substrate. The monopulse comparator is integrated at the horizontal feeding network. The antenna array operates in S-band with a beam-width of 2.2 degrees in the H-plane and 15 degrees in the
Vadim Zavodny, Petr Kopecky
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Near Field Radar Antenna Testing

13th European Microwave Conference, 1983, 2006
The practical description and theoretical basis of an outdoor, transportable, cylindrical near field antenna test facility is presented. The fully automated system makes small demands upon overall test time, computer storage and processing time. Its prime purpose is for radiation pattern testing of large L-Band radar antennas.
J.R. Brain, P.A. Langsford
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MIMO Radar with Colocated Antennas

IEEE Signal Processing Magazine, 2007
We have provided a review of some recent results on the emerging technology of MIMO radar with colocated antennas. We have shown that the waveform diversity offered by such a MIMO radar system enables significant superiority over its phased-array counterpart, including much improved parameter identifiability, direct applicability of adaptive techniques
Jian Li, Petre Stoica
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Modeling radar antenna in NEC

2006 International Conference on Software in Telecommunications and Computer Networks, 2006
The paper deals with the radar antenna modelling using NEC Win package. Obtaining radar antenna radiation model was necessary so one can later use it for calculation of radiation strength and estimation if there is any potential radiation damage to instruments that should be used for measuring radar antenna radiation.
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W-band monopulse radar antenna

2013 IEEE INTERNATIONAL CONFERENCE ON MICROWAVE TECHNOLOGY & COMPUTATIONAL ELECTROMAGNETICS, 2013
In this paper, the method for formatting sequential rotation subarray and the far field function are studied. Simulate a formatting sequential rotation subarray with four microstip antenna subarrays at 93GHz. The impendance bandwith determined from a 1.5 VSWR is 3.3GHz. The gain was approximately 24dB, and null depth is over 40dB.
null Caitao Jiang, null Guoqiang Zhao, null Houjun Sun, null Xin Lv   +3 more
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Mechanical scanners for radar antennas

Transactions of the IRE Professional Group on Antennas and Propagation, 1952
The mechanical scanner is the most versatile and widely used antenna system for airborne radar application. In general, its radiation characteristics are superior to those of electrical scanned systems. There are three basic types of scanners: The wigwag, spiral, and helical.
G. Walters, J. Damonte
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Directional borehole radar antenna calibration

2010 IEEE Instrumentation & Measurement Technology Conference Proceedings, 2010
A directional borehole radar system was developed and tested to assess its directional accuracy. The radar probe employs an Adcock dipole array as its receiving antenna. It is well known that the directional accuracy of the radar probe deteriorates significantly with increased antenna eccentricity.
Kibreab Behaimanot, Matthias Boeger, Albrecht Glasmachers   +2 more
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