Abstract
The actual source of the “feed image lobe” in fixed-beam single-layer offset-fed reflectarrays composed of variable-size patch or dipole elements is diagnosed using a novel technique based on determining the individual contributions of the conduction currents on the reflectarray elements and the groundplane, to the reflectarray scattered fields. The behavior of the feed image lobe is studied over a range of frequencies about the center frequency, and this is used to establish the fact that both the elements and the groundplane are responsible for the presence of the feed image lobe. We show how to reduce or eliminate the feed image lobe at off-center frequencies in offset-fed reflectarrays through use of sub-wavelength reflectarrays instead of conventional reflectarrays with half-wavelength inter-element spacing. Measured and full-wave predicted results are used in all discussions.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
