Results 291 to 300 of about 66,927 (344)
Some of the next articles are maybe not open access.
Pressurized antennas for space radars
Sensor Systems for the 80's Conference, 1980The 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
openaire +1 more source
76GHz Radar Antenna Alignment System
2000 30th European Microwave Conference, 2000In 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 +3 more
openaire +1 more source
Antenna for 3D radar demonstrator
2015 European Radar Conference (EuRAD), 2015The 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
openaire +1 more source
Near Field Radar Antenna Testing
13th European Microwave Conference, 1983, 2006The 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
openaire +1 more source
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.
openaire +1 more source
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.
openaire +1 more source
W-band monopulse radar antenna
2013 IEEE INTERNATIONAL CONFERENCE ON MICROWAVE TECHNOLOGY & COMPUTATIONAL ELECTROMAGNETICS, 2013In 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 +3 more
openaire +1 more source
Mechanical scanners for radar antennas
Transactions of the IRE Professional Group on Antennas and Propagation, 1952The 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
openaire +1 more source
Directional borehole radar antenna calibration
2010 IEEE Instrumentation & Measurement Technology Conference Proceedings, 2010A 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 +2 more
openaire +1 more source
Helicopter Rotor Blade Radar Antenna
Journal of the American Helicopter Society, 1966The helicopter main rotor blade can be used as a scanning radar antenna. Its large aperture gives a narrow azimuth beam‐width and the natural rotor scanning motion provides a fast scan. It is much lighter than conventional antennas and since it is integral with the rotor blade, it induces no additional drag.
openaire +1 more source
Journal of the Franklin Institute, 1995
Abstract This paper reviews some of the current interests in radar antennas, including work conducted at the U.S. Naval Research Laboratory. Almost all types of antennas have been used in radar, but it is the phased array which has received the most attention in recent years, especially for military applications. Methods for making phased arrays more
openaire +1 more source
Abstract This paper reviews some of the current interests in radar antennas, including work conducted at the U.S. Naval Research Laboratory. Almost all types of antennas have been used in radar, but it is the phased array which has received the most attention in recent years, especially for military applications. Methods for making phased arrays more
openaire +1 more source