Smooth-walled feedhorn

US9373891B2 · kind B2 · utility

Assignees

• THE JOHNS HOPKINS UNIVERSITY · US
• THE UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATION OF THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION · US

Inventors

• Charles L. Bennett · Livermore, US
• Lingzhen Zeng · Baltimore, US
• Edward J. Wollack · Glenn Dale, US
• David T. Chuss · Bowie, US

Key dates

• Filing date: Aug 6, 2015
• Grant date: Jun 21, 2016
• Expiry date: Aug 6, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49018
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A device for at least one of receiving and transmitting electromagnetic radiation includes a feedhorn having a substantially smooth, electrically conducting inner surface extending from an open end to a feed end, the inner surface being substantially rotationally symmetrical about a longitudinal axis, wherein an orthogonal distance from a point on the longitudinal axis to the substantially smooth, electrically conducting inner surface increases monotonically as the point on the longitudinal axis is selected at successively greater distances from the feed end of the feedhorn towards the open end of the feedhorn such that a profile of the substantially smooth, electrically conducting inner surface of the feedhorn is monotonically increasing. The feedhorn has an operating bandwidth and the feedhorn provides a maximum of −30 dB cross polarization response over at least 15% of the operating bandwidth. A method of producing a feedhorn for receiving or transmitting electromagnetic radiation includes determining a profile of an inner surface of the feedhorn based on constraints required to achieve a plurality of operating parameters, providing a pre-machined feedhorn having an initial inne…