Cavity-Excited Switched-Beam Metagrating Antennas

Fengming Hu, Ariel Epstein

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


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.

Original languageEnglish
Title of host publication17th European Conference on Antennas and Propagation, EuCAP 2023
ISBN (Electronic)9788831299077
StatePublished - 2023
Event17th European Conference on Antennas and Propagation, EuCAP 2023 - Florence, Italy
Duration: 26 Mar 202331 Mar 2023

Publication series

Name17th European Conference on Antennas and Propagation, EuCAP 2023


Conference17th European Conference on Antennas and Propagation, EuCAP 2023


  • aperture illumination efficiency
  • metagrating
  • multifunctionality
  • switched-beam antennas

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Hardware and Architecture
  • Computer Networks and Communications


Dive into the research topics of 'Cavity-Excited Switched-Beam Metagrating Antennas'. Together they form a unique fingerprint.

Cite this