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. 15, 1991
Filed:
Dec. 11, 1989
Horst Dorrie, Berlin, DE;
Uwe Militz, Berlin, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
To provide a single antenna suitable both for VHF as well as UHF television (TV) reception, without changing the length of the antenna, a core support rod (11) of, for example, flexible plastic material is resiliently coupled at one end to a connection terminal (29). Wound on the rod are two connected windings (12, 13), one of them being spiralled with wide spiral turns about the core support rod (11) throughout the major length of the antenna, the other winding (13) being wound closely or tightly thereabout. The two windings are capacitatively coupled by a turn or loop (17) of a third winding (18), pushed between the two last turns (15, 16) of the third winding (13) and electrically connected to the connection terminal (29). The distance (1.sub.1) between the third winding (18) and the connection terminal (29) is .lambda..sub.U /4, the distance between the end of the first winding (12) and the terminal is .lambda..sub.U /4, and which .lambda..sub.U and .lambda..sub. V are, respectively, the average or median wave lengths of the respective UHF and VHF TV signal bands.