Abstract

Passive backscattering links in scattering sensor arrays suffer from mutual coupling among closely spaced neighbor antennas. This effect results in an unmatched circuitry at input ports of antennas causing poor power harvesting, weak backscattering, overall low read rates. In this paper, a model for mutual coupling in a $N$ by $N$ scattering antenna arrays is discussed. We show by simulations and measurements that in a two-scatterer system (one target and one neighbor antennas) the mutual coupling effect from the neighbor to the target varies depending on its load and also its location with respect to the target and the incident wave. We show that by load switching at neighbor antenna mutual coupling effect can be controlled to produce constructive interference at target antenna. Next, cooperative interference control by load switching is examined in a scattering antenna array. Simulation results show that by load switching at neighboring scatterers in a 3 by 3 scattering array the signal of a target antenna-which is proportional to its induced current-in the back row can be improved by 21 dB.

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

antenna scattering; backscattering; interference; mutual coupling; RFID

International Standard Serial Number (ISSN)

2469-7281

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 Institute of Electrical and Electronics Engineers, All rights reserved.

Publication Date

01 Sep 2018

Share

 
COinS