Results 81 to 90 of about 132 (115)

Fast response Retrodirective Radar

2010 IEEE MTT-S International Microwave Symposium, 2010
This paper shows the ability of an all analogue Retrodirective Radar, the first of its type, to provide continuous surveillance and near instantaneous target acquisition while automatically beam steering in real time onto a target which is presented to it.
N. B. Buchanan, V. Fusco, P. Sundaralingam   +2 more
openaire   +1 more source

Response analysis of monopulse radar under retrodirective and non-retrodirective cross-eye jamming

2016 CIE International Conference on Radar (RADAR), 2016
With the development of the ECM technology, cross-eye jamming technique becomes more and more practical. In order to study ECCM method for this jamming, retrodirective cross-eye and non-retrodirective cross-eye were studied and analyzed. The mathematical model of monopulse radar's sum signal and difference signal under cross-eye jamming is established ...
Wang Jianlu, Zhang Yang, Dai Huanyao, Cui Jianling   +3 more
openaire   +1 more source

Retrodirective arrays for wireless communications

IEEE Microwave Magazine, 2002
This article reports the recent progress in active and passive retrodirective arrays using phase-conjugation techniques. The arrays presented here are designed for wireless communications in microwave bands and have other features in addition to self-phasing aspects such that they can be applied to practical communication systems.
R.Y. Miyamoto, T. Itoh
openaire   +1 more source

Retrodirective airborne radar for urban surveillance

2008 42nd Asilomar Conference on Signals, Systems and Computers, 2008
Urban surveillance with airborne radar systems is very challenging due to blockage of line-of-sight caused by buildings. To overcome this limitation, it is very likely that the radar will be mounted on a small, inexpensive unmanned aerial vehicle (UAV) that can fly directly over an urban area of interest. Unfortunately, such systems provide very little
openaire   +2 more sources

Redirective and retrodirective antenna arrays

IEEE Transactions on Antennas and Propagation, 1969
The problem considered is the redirection of a time-varying signal from one specified point to another by a set of arbitrarily spaced antenna array elements. The necessary and sufficient condition for signal redirection is determined without restricting the analysis to a monochromatic signal.
E. Putzer, R. Ghose
openaire   +1 more source

A Sparsely Designed Retrodirective Transponder

IEEE Antennas and Wireless Propagation Letters, 2006
Retrodirective arrays have shown great potential for use as wireless transponders due to their automatic source tracking ability. A retrodirective transponder based on a sparse array is presented. The architecture uses a sparse array design to reduce the amount of elements, and thus circuitry required.
D. S. Goshi, K. M. K. H. Leong, T. Itoh
openaire   +1 more source

A study of retrodirective array performance in the presence of multipath

Proceedings. Second Annual Conference on Communication Networks and Services Research, 2004., 2004
The paper attempts to analyze the performance of a heterodyne phase conjugate retrodirective transceiver for full duplex communications in the presence of multipath signals and amplitude and phase perturbations across a four element antenna array. Simulation results are given and it is shown that the retrodirective array improves multipath fading in a ...
Chris Loadman, Zhizhang Chen
openaire   +1 more source

Retrodirective Radar Calibration Nanosatellite

2013
Abstract : For more than eight years, the DMSP F-15 and RADCAL satellites have been operating past their operational lifetimes and are facing imminent failure, leaving the US military without a reliable means for C-Band radar calibration and performance monitoring.
Nicholas G. Fisher, Larry K. Martin, Wayne A. Shiroma   +2 more
openaire   +1 more source

Error estimation in retrodirective channel implementation

2017 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS), 2017
Cross-eye (CE) jamming is a technique of electronic attack that can provide self-protection of aircraft against guided missiles using monopulse type radar. Implementation of a CE jammer using a retrodirective channel in a non-reciprocal electronic warfare system requires an appropriate system design and a correction process to achieve reciprocity. This
openaire   +1 more source

New shield structure for retrodirective and invisible applications

Microwave and Optical Technology Letters, 2016
Antonio Tazón, Tomáš Fernández
exaly