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:
Oct. 26, 1982
Filed:
Mar. 23, 1981
Harry J Gould, Mesa, AZ (US);
Keiji Kawaguchi, Mountain View, CA (US);
Ford Aerospace & Communications Corp., Detroit, MI (US);
Abstract
A septum polarizer offering an exceptionally low axial ratio over a wide frequency band. A first trapped mode resonator or resonator pair is inserted in the circularly polarizing waveguide within the same plane as the septum and tuning screws to create a desired resonant response at a frequency lower than the cutoff frequency of the polarizer. Optionally, a second pair of trapped mode resonators is inserted in two opposing waveguide walls that are orthogonal to the septum, to create a desired resonant response at a higher frequency than the upper frequency limit of the polarizer. The resonators serve to flatten the phase response of the polarizer throughout its passband, thereby maximizing the purity of circularly polarized radiation produced thereby.