TY - GEN
T1 - Cavity-Excited Switched-Beam Metagrating Antennas
AU - Hu, Fengming
AU - Epstein, Ariel
N1 - Publisher Copyright:
© 2023 European Association for Antennas and Propagation.
PY - 2023
Y1 - 2023
N2 - We present a semianalytical scheme to design cavityexcited switched-beam antennas based on printed-circuit-board (PCB) metagratings (MGs), sparse arrays of subwavelength scatterrers (meta-atoms) synthesized via accurate tailoring of mutual coupling. Multiple simple sources embedded in the cavity serve as excitations for a passive multilayered multielement MG superstrate, designed to generate different radiation patterns in response to each of the source ports. The developed synthesis approach utilizes the cavity eigenmode expansion of the source and radiation fields to realize the desired aperture field distribution (and consequently the target radiation patterns). To validate our model and methodology, a switched-beam antenna with three sources is designed and verified in full-wave simulations, exhibiting aperture illumination efficiencies superseding 90% for all three radiation states. This work offers effective and versatile means to implement high-directivity steerable antennas without nonlinear components, especially useful for high-frequency regimes expected in future communication systems.
AB - We present a semianalytical scheme to design cavityexcited switched-beam antennas based on printed-circuit-board (PCB) metagratings (MGs), sparse arrays of subwavelength scatterrers (meta-atoms) synthesized via accurate tailoring of mutual coupling. Multiple simple sources embedded in the cavity serve as excitations for a passive multilayered multielement MG superstrate, designed to generate different radiation patterns in response to each of the source ports. The developed synthesis approach utilizes the cavity eigenmode expansion of the source and radiation fields to realize the desired aperture field distribution (and consequently the target radiation patterns). To validate our model and methodology, a switched-beam antenna with three sources is designed and verified in full-wave simulations, exhibiting aperture illumination efficiencies superseding 90% for all three radiation states. This work offers effective and versatile means to implement high-directivity steerable antennas without nonlinear components, especially useful for high-frequency regimes expected in future communication systems.
KW - aperture illumination efficiency
KW - metagrating
KW - multifunctionality
KW - switched-beam antennas
UR - http://www.scopus.com/inward/record.url?scp=85162245600&partnerID=8YFLogxK
U2 - 10.23919/EuCAP57121.2023.10133070
DO - 10.23919/EuCAP57121.2023.10133070
M3 - ???researchoutput.researchoutputtypes.contributiontobookanthology.conference???
AN - SCOPUS:85162245600
T3 - 17th European Conference on Antennas and Propagation, EuCAP 2023
BT - 17th European Conference on Antennas and Propagation, EuCAP 2023
T2 - 17th European Conference on Antennas and Propagation, EuCAP 2023
Y2 - 26 March 2023 through 31 March 2023
ER -