Beam-Steerable Transponder Based on Antenna Array and Phased Modulators

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Journal Title
Journal ISSN
Volume Title
Letter
Date
2021-03
Major/Subject
Mcode
Degree programme
Language
en
Pages
5
356-360
Series
IEEE Antennas and Wireless Propagation Letters, Volume 20, issue 3
Abstract
This letter presents a novel concept of beam-steerable transponder based on antenna array and phased modulators. The steerability of the beam is achieved by optimally delaying the modulated reflected signal at each antenna element (i.e., changing the phase in frequency domain) with load modulation technique. In this manner, the reflected backscattered signal power can be maximized at one particular direction. The approach makes transponder to collect ambient waves from any direction and further modulate and redirect it to any other direction. The results obtained through experimentation proves the feasibility of omnidirectional transponder and pave way for future lower-power smart devices. The transponder functions in the Wi-Fi frequency band of 2.4GHz.
Description
Keywords
Ambient signals, antenna array, Antenna arrays, backscatter, beam-steering, Delays, IoTs, load modulation, Phase modulation, Phased arrays, Radio frequency, rescatter, retrodirectivity, Switches, Transponders, WSNs
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Citation
Siddiqui , T A , Holopainen , J & Viikari , V 2021 , ' Beam-Steerable Transponder Based on Antenna Array and Phased Modulators ' , IEEE Antennas and Wireless Propagation Letters , vol. 20 , no. 3 , 9316800 , pp. 356-360 . https://doi.org/10.1109/LAWP.2021.3049972