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:
May. 23, 1989
Filed:
Jul. 12, 1988
Donald R Newcomb, Lockhart, TX (US);
Butternut Electronics Company, Lockhart, TX (US);
Abstract
A ten-band vertical antenna includes completely automatic band switching for the amateur radio frequencies of eighty, seventy-five meters, forty meters, thirty meters, twenty meters, seventeen meters, fifteen meters, twelve meters, ten meters and six meters. The vertical antenna has a low angle of radiation and a low standing wave ratio on all frequencies which provides for direct coaxial cable transmission line feed. The seventy-five-meter, a switchable eighty-meter, and forty-meter inductor-capacitors are in parallel, while the thirty-meter inductor-capacitor is in series with a portion of the forty-meter circuit thereby providing inductive reactance for operation on eighty meters, seventy-five meters, forty meters, and thirty meters with a series inductor-capacitor connected between an upper vertical radiating element and the forty-meter inductor while permitting simultaneous resonance on each of the three higher frequencies of twenty, fifteen and ten meters. The entire radiator length of the vertical antenna is acitve on all frequencies except for fifteen and six meters where the upper portion of the antenna is decoupled above an end of a fifteen or six-meter quarter-wave decoupling stub. The seventeen- and twelve-meter circuits provide for decoupling so that the entire radiator length of the vertical antenna below these circuits is active. A coaxial relay can be switched to change between seventy-five meters and eighty meters operation by switching in an inductor-capacitor circuit for eighty meter operation. A six meter stub connects about the vertical section adjacent the fifteen meter stub connection.