Line-fed phase controlled antenna

US4754286A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Anton Brunner · Starnberg, DE
• Wolfgang Koethmann

Key dates

• Filing date: Oct 7, 1985
• Grant date: Jun 28, 1988
• Expiry date: Oct 7, 2005

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01Q25/02
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

In order to achieve an improved monopulse difference pattern, a transition zone is created between the antiphase-excited halves of a phase-controlled antenna composed of a plurality of individual radiators, being created therein along a line of symmetry which separates the halves of the antenna and which comprises individual radiator strips, for example vertical columns or horizontal rows, extending next to one another and parallel to the line of symmetry, in which transition zone, extending from each edge up to the line of symmetry and the center of the transition zone, the number of individual radiators respectively excited antiphase increases in the same manner in comparison to the number of all individual radiators lying in a strip from 0% at each edge up to 50% at the line of symmetry. This principle also particularly applies to a monopulse antenna which is to generate a differential path both for the azimuth and for the elevation and which is composed of four quadrants which are respectively excited antiphase in pairs.