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:
Jan. 14, 1997
Filed:
Apr. 21, 1995
Donald E Wingo, Lincoln, NE (US);
Centurion International, Inc., Lincoln, NE (US);
Abstract
A retractable antenna for use with portable communication equipment comprising two electrically independent electromagnetic radiators in a single package with two modes of operation, retracted and extended. When the antenna is in its retracted position, a short normal-mode monofilar helical radiator is functional. When the antenna is in its extended position, a thin linear radiating element is functional. A switch is provided which connects the internal circuitry of the device to the linear radiating element when the antenna is in its extended position and which connects the internal circuitry of the device to the helical radiator when the antenna is in its retracted position. In each of the extended and retracted positions, the linear radiator and the helical radiator are isolated from one another. A modified form of the antenna is also disclosed.