Title:
LOOP ANTENNA
Document Type and Number:
Japanese Patent JP2013223117
Kind Code:
A
Abstract:
To provide a loop antenna that achieves high performance space limitation by securing stable communication quality by achieving high magnetic flux density in a particular space, and by limiting information conveyance by notably and quickly attenuating the magnetic flux density in a space other than the particular space.
A loop antenna comprises N (more than 1) current loops placed on the same plane and having the same center. When k is an integer of 1 or more and N or less, and about the kth current loop, Ik is flowing current, Mk is the number of turns of the loop, and rk is a radius, the following condition is satisfied.
Inventors:
OGASAWARA TAKAYUKI
SASAKI AIICHIRO
MORIMURA HIROKI
SASAKI AIICHIRO
MORIMURA HIROKI
Application Number:
JP2012093815A
Publication Date:
October 28, 2013
Filing Date:
April 17, 2012
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE
International Classes:
H01Q7/00
Domestic Patent References:
| JPH08330840A | 1996-12-13 | |||
| JPH08293724A | 1996-11-05 | |||
| JPH04248704A | 1992-09-04 | |||
| JPH11313017A | 1999-11-09 |
Attorney, Agent or Firm:
Hidekazu Miyoshi
Rie Kudo
Rie Kudo