Directive bar-type antenna

Details Directive bar-type antenna Directive bar-type antenna

2009-04-03

2011-12-13

Nguyen, Hoang V (Department: 2821)

Communications: radio wave antennas

Antennas

Including magnetic material

C343S787000

Reexamination Certificate

active

08077105

ABSTRACT:
Disclosed is a directional bar-type antenna which comprising a plurality of bar-shaped antenna elements including a core and a coil wound around the core. The first bar-shaped antenna element is disposed at a position of a mirror image of the second bar-shaped antenna element with respect to the core of the third bar-shaped antenna element. The first and second bar-shaped antenna elements is positioned such that one end of each of the first and second bar-shaped antenna elements is close to the third bar-shaped antenna element, and the other end is far from the third bar-shaped antenna element. In the present invention, a winding direction of the coil of the first bar-shaped antenna element is preferably identical to that of the coil of the second bar-shaped antenna element, and is opposite to that of the coil of the third bar-shaped antenna element. The directional bar-type antenna of present invention can meet a need for providing asymmetrical directionality in a forward-rearward direction of an antenna for use in a specific system, such as a keyless entry system, and solve a problem in terms of cost and external appearance, in a technique of partially surrounding a bar-type antenna by a shielding member, in view of difficulty in freely controlling directionality of an antenna in an induced electromagnetic field domain, and a need to allow the bar-type antenna to have a difference between respective receiving sensitivities in forward and rearward directions in the induced electromagnetic field domain (while facilitating a reduction in size and cost).

REFERENCES:
patent: 3623116 (1971-11-01), Green et al.
patent: 4879570 (1989-11-01), Takizawa et al.
patent: 7068223 (2006-06-01), Yoshida et al.
patent: 07-221526 (1995-08-01), None
patent: 2002-217635 (2002-08-01), None
patent: 2007-065881 (2007-03-01), None

Affiliated with

Also associated with

Rating

Directive bar-type antenna does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Directive bar-type antenna, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Directive bar-type antenna will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4311211