Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
RING ANTENNA
Document Type and Number:
WIPO Patent Application WO/2013/132715
Kind Code:
A1
Abstract:
In order to obtain excellent electrical characteristics even when located in proximity to a conductor, a ring antenna (1) has a C-shaped loop element (22a) formed on the upper surface of a main body part (1a) comprising a ring-shaped dielectric material having a substantially square cross-sectional shape. A cut part (23a) is formed in a portion of this C-shaped loop element (22a), which is formed in the shape of a loop. In addition, an arc-shaped excitation element (21a) is formed on the inner circumferential surface of the main body part (1a) so as to be substantially concentric with the C-shaped loop element (22a), with a prescribed interval therebetween. The C-shaped loop element (22a) is excited by the excitation element (21a). The tip of a power supply conductor (16) is connected to a power supply unit that is connected to one end of the excitation element (21a) formed on the lower surface of main body part (1a), with power being supplied to the excitation element (21a) from the power supply conductor (16). Excellent electrical characteristics can be obtained with this ring antenna (1), even when housed in an exterior casing.

Inventors:
MAMURO AKIO (JP)
FUJISAWA TERUHIKO (JP)
Application Number:
PCT/JP2012/082197
Publication Date:
September 12, 2013
Filing Date:
December 12, 2012
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NIPPON ANTENNA KK (JP)
SEIKO EPSON CORP (JP)
International Classes:
H01Q7/00; H01Q1/38
Domestic Patent References:
WO2007088799A12007-08-09
Foreign References:
JP2003163531A2003-06-06
JP2008205531A2008-09-04
JP2006287369A2006-10-19
JP3982918B22007-09-26
Other References:
See also references of EP 2824763A4
Attorney, Agent or Firm:
ASAMI Yasuo et al. (JP)
Yasuo Asami (JP)
Download PDF:
Claims: