Results 111 to 120 of about 777 (161)
Wideband circularly polarized leaky wave rectenna. [PDF]
Sci RepMohamed N +4 more
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5G-enabled, battery-less smart skins for self-monitoring megastructures and digital twin applications. [PDF]
Sci RepLynch C +9 more
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Towards net zero: A technological review on the potential of space-based solar power and wireless power transmission. [PDF]
HeliyonAlam KS +13 more
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Circular Retrodirective Arrays for Launch Vehicles
, 2019 This paper will present recent findings relating to the feasibility of a circular self-tracking (retrodirective) antenna array for launch vehicle applications. Circular retrodirective arrays (RDAs), are comprised of a single ring of elements placed on a cylindrical ground plane. A breadboard of a circular RDA has already been built and measured at QUB.
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Designing a Passive Retrodirective Wireless Sensor
IEEE Antennas and Wireless Propagation Letters, 2017This letter presents a wireless sensing approach implemented using a fully passive sensor element and a retrodirective antenna array. The utilized sensor is based on frequency modulation, and the proposed concept is investigated both theoretically and experimentally.
Kimmo Rasilainen +2 more
exaly +2 more sources
Implementation and Testing of a Retrodirective Cross-Eye Jammer [PDF]
IEEE Transactions on Aerospace and Electronic Systems, 2022 One of the few electronic attack techniques that can deceive radars in angle is cross-eye jamming, which mimics the naturally-occurring phenomenon glint. The extreme tolerance requirements of cross-eye jamming mean that a retrodirective implementation is required, but published measurements of cross-eye jamming either ignore the retrodirective ...
Frans-Paul Pieterse +1 more
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Response analysis of monopulse radar under retrodirective and non-retrodirective cross-eye jamming
2016 CIE International Conference on Radar (RADAR), 2016With 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 +3 more
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Retrodirective arrays for wireless communications
IEEE Microwave Magazine, 2002This 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
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Phase‐conjugating retrodirective cross‐eye jamming [PDF]
Electronics Letters, 2020 A cross‐eye jammer based on a phase‐conjugating (PC) retrodirective array is proposed. Such PC cross‐eye jammers eliminate the delay inherent in traditional Van‐Atta (VA) cross‐eye jammers and induce errors in radars that use the same antenna beam for ...
Warren du Plessis
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Retrodirective Array Performance in the Presence of Near Field Obstructions
IEEE Transactions on Antennas and Propagation, 2010 We investigate the situation where there are obstructing elements present in the near field of a retrodirective array. We describe three scattering cases, (1) by an array of straight wires, (2) by low loss medium density fibre board partially obscuring ...
Vincent Fusco, Neil Buchanan
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