The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 29, 2026
Filed:
Jul. 06, 2023
California Institute of Technology, Pasadena, CA (US);
Nacer E. Chahat, Altadena, CA (US);
Gaurangi Gupta, Pasadena, CA (US);
John L. Wolff, Pasadena, CA (US);
Adrian J. Tang, Pasadena, CA (US);
Goutam Chattopadhyay, Pasadena, CA (US);
CALIFORNIA INSTITUTE OF TECHNOLOGY, Pasadena, CA (US);
Abstract
A metal-only flat metasurface antenna is described. The antenna includes a pillbox beamformer combined with a metasurface structure provided by an array of non-resonant subwavelength unit elements having opening sizes that are strictly smaller than half of the guided-mode wavelength. The pillbox beamformer includes bottom and top parallel plate waveguides (PWPs) forming respective bottom and top cavities for propagation of the guided-mode. Bottom, middle and top metal plates form the two PWPs. Arranged at one end of the bottom and top PWPs is a respective parabolic structure. An all-metal horn structure is centrally arranged at a second end of the bottom PWP opposite the parabolic structure. According to one aspect, the horn structure includes a single feed port arranged at a focal point of the parabolic structure. According to another aspect, the horn structure includes two feed ports arranged at an offset of the focal point.