Dual frequency band inverted-F antenna

Details Dual frequency band inverted-F antenna Dual frequency band inverted-F antenna

2005-08-16

2005-08-16

Ho, Tan (Department: 2821)

Communications: radio wave antennas

Antennas

Microstrip

C343S895000

Reexamination Certificate

active

06930640

ABSTRACT:
A dual frequency band inverted-F antenna used for communicating a low frequency signal and a high frequency signal includes a substrate, a ground metal, a vortical metal structure, a short circuit leg, a feeding leg, and a terminal micro strip. The ground metal and the terminal micro strip are formed on the lower surface of the substrate. The vortical metal structure, formed on the upper surface of the substrate, further has a short circuit end and an open circuit end. The short circuit leg connects electrically the short circuit end of the vortical metal structure with the ground metal. The feeding leg extends along a predetermined direction of the vortical metal structure to couple with a feeding circuit on the substrate. The terminal micro strip connects electrically to the open circuit end through a first conductive aperture. By increasing the encircling number of the vortical metal structure, the coupling effect is generated so that the equivalent wavelength of the high frequency signal can be longer, thus the resonance frequency thereof can be reduced, and so a first frequency can be still kept communicating at a lower frequency band and a second frequency can also be added for communicating at a higher frequency band.

REFERENCES:
patent: 5929825 (1999-07-01), Niu et al.
patent: 6295029 (2001-09-01), Chen et al.
patent: 6353443 (2002-03-01), Ying
patent: 6424315 (2002-07-01), Glenn et al.
patent: 6535172 (2003-03-01), Hirabayashi
patent: 6552686 (2003-04-01), Ollikainen et al.

Affiliated with

Also associated with

Rating

Dual frequency band inverted-F 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 Dual frequency band inverted-F antenna, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual frequency band inverted-F antenna will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3452588