Results 251 to 260 of about 5,339 (296)

Radar imaging based on rotating antenna

ICASSP-88., International Conference on Acoustics, Speech, and Signal Processing, 2003
A radar imaging method for terrain is introduced in which the radar is suspended in the air, but the radar antenna is rotating. The relation between echo signals and the terrain image (the absolute value of terrain reflectivity) is examined. An imaging method called equal-range projection deconvolution is the derived, and an algorithm reconstructing ...
Deng Wenbiao, Zheng Bao 0001
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The influence of radome on radar antennas system

2012 9th International Conference on Communications (COMM), 2012
This paper aim is to study the influence of a radome on the air surveillance radar systems. The study was performed using numerical methods, due to the problem complexity. It is very hard to accomplish a complete realistic study because of huge electrical dimensions but we can get some conclusions to improve the radar-radome assembly.
Mihaita Arhip, Gheorghe Gavrila
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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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Radar with separated subarray antennas

2003 Proceedings of the International Conference on Radar (IEEE Cat. No.03EX695), 2004
In the work reported in this paper, we have investigated the possibilities of using separated subarray apertures in various radar applications based on the next generation technology for active electronically scanned arrays, (AESA). We have looked at the possible benefits of using separated subarray apertures and have adapted sidelobe- and main lobe ...
J.-E. Nilsson, H. Warston
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Radar Antennas

D.V. Nezlin
exaly   +2 more sources

Compact Slotted Antenna for Wideband Radar Applications

2013
A new type of slotted microstrip antenna, suitable for wideband radar applications, is proposed in this work. The standard U-slot shape, usually adopted to enlarge the operating bandwidth of a microstrip patch, is properly modified to reduce the undesired cross-polar effects, while providing also a significant size reduction.
COSTANZO, Sandra, COSTANZO A.
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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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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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Antenna for automobile radar

1997
The authors have developed a planar antenna for an automobile radar of 76-77 GHz range. The effect of transformation of slow surface waves into space ones by means of a diffraction grating has been used.
Yevdokymov, Anatoliy P., Krizhanovsky, Volodymyr V.   +1 more
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Torque requirements of a radar antenna

Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics, 1954
Results of wind tunnel tests on an experimental radar antenna are discussed. The torque required to rotate the antenna was seen to vary with the azimuth position, the elevation angle, the pivot location, the rotating speed, and the wind velocity. A correlation of the data based on dimensionless parameters was found.
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