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:
Feb. 01, 2005
Filed:
Jun. 11, 2003
Applicants:
I-fong Chen, Tao-Yuan, TW;
Chia-mei Peng, Pingchun, TW;
Inventors:
I-Fong Chen, Tao-Yuan, TW;
Chia-Mei Peng, Pingchun, TW;
Assignee:
Auden Techno Corp., Tao-Yuan Hsien, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01Q 124 ;
U.S. Cl.
CPC ...
Abstract
A U-shaped multi-frequency antenna of high efficiency, the antenna has a common feed line connected with an inner and an outer U-shaped wire in symmetrical forms respectively to decide impedance bandwidths of frequency bands selected, and has a balanced circuit of the structure of a Balun circuit having a gradually tapered microstrip to harmonize the impedance bandwidths. Thereby such an omni-directional multi-frequency antenna with a high gain and a bandwidth can be conveniently manufactured.