Kenji Kakemizu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: A shared antenna communicates radio waves with different frequencies or different polarization characteristics, and has a simple configuration that can be placed in a small device. The antenna includes a plurality of loops of the shape of a cross in a spiral fashion and includes a gap provided at a certain midpoint in the spiral loops and a power supply portion provided in a central portion. The distance of the gap is set such that electromagnetic coupling is caused at a first frequency and no electromagnetic coupling is caused at a second frequency different from the first frequency.
Type:
Grant
Filed:
August 26, 2011
Date of Patent:
March 8, 2016
Assignee:
NATIONAL UNIVERSITY CORPORATION EHIME UNIVERSITY
Abstract: It is an object of the present invention to provide a shared antenna capable of communicating radio waves with different frequencies or different polarization characteristics, having a simple configuration, and capable of being placed in a small device. An antenna 1 according to the invention includes a plurality of loops of the shape of a cross in a spiral fashion and includes a gap 5 provided at a certain midpoint in the spiral loops and a power supply portion 4 provided in a central portion. The distance of the gap 5 is set such that electromagnetic coupling is caused at a first frequency and no electromagnetic coupling is caused at a second frequency different from the first frequency.
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