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. 24, 2005
Filed:
Jul. 03, 2003
Jung Bin Bae, Gwangju, KR;
Jong Kyu Kim, Gyeonggi-do, KR;
Jae Gun Lee, Gyeonggi-do, KR;
Antenna Tech, Inc., Gwangju, KR;
Abstract
A multi-band helical antenna of the present invention includes a dielectric body including a plurality of dielectric sheets stacked in a predetermined order and a first and a second metallic pattern sections provided in the dielectric body. The first metallic pattern includes a plurality of first partially opened metallic loop patterns and a plurality of first connection elements connecting the respective adjacent first partially opened metallic loop patterns to form a first spiral structure. The second metallic pattern section includes a plurality of second partially opened metallic loop patterns and a plurality of second connection elements connecting the respective adjacent second partially opened metallic loop patterns to form a second spiral structure. The first and the second metallic pattern sections having different entire lengths. Accordingly, the multi-band helical antenna of the present invention has a dual resonant frequency characteristic and operates in different frequency bands.