Results 81 to 90 of about 716,699 (142)

Retrodirective arrays interrogated by nonuniform wavefronts [PDF]

open access: yes, 2010
This thesis presents innovative retrodirective array technology based on inter-element phase-and amplitude detection and amplitude compensation, to increase the performance of RF front-end systems.
Zamora, Alexis
core  

Circular Retrodirective Arrays for Launch Vehicles

open access: yes, 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.
openaire   +1 more source

Retrodirective phased array antenna for nanosatellites [PDF]

open access: yes, 2019
Thesis (M.S.) University of Alaska Fairbanks, 2019This thesis presents a S-band phased array antenna for CubeSat applications. Existing state-of the-art high gain antenna systems are not well suited to the majority of CubeSats, those that fall within the
Long, Justin W.
core  

NOMA-based retrodirective frequency diverse array for multi-user communication

open access: yes
Frequency Diverse Array (FDA) and retrodirective array have found applications in wireless communication networks, offering cost-effective and efficient beamforming capabilities.
Ahmed, Haroon   +3 more
core   +1 more source

The Impact of Array Size on Fading in Retrodirective Backscatter Channels: Modelling and Simulation

open access: yes
4649This paper investigates how the number of antenna elements in retrodirective arrays of transponders affects the robustness of backscatter systems like radio-frequency identification (RFID) systems against fading.
Grenter, Thorben, Böller, Sebastian
core   +1 more source

Time Modulated Arrays: From their Origin to Their Utilization in Wireless Communication Systems. [PDF]

open access: yesSensors (Basel), 2017
Maneiro-Catoira R   +3 more
europepmc   +1 more source

Time Modulation-Based Multi-User Covert Communication. [PDF]

open access: yesEntropy (Basel)
Jiang L   +5 more
europepmc   +1 more source

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