The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2011
Filed:
Aug. 23, 2007
Cheng-jung Lee, Los Angeles, CA (US);
Kevin M. K. H. Leong, Los Angeles, CA (US);
Tatsuo Itoh, Rolling Hills, CA (US);
Cheng-Jung Lee, Los Angeles, CA (US);
Kevin M. K. H. Leong, Los Angeles, CA (US);
Tatsuo Itoh, Rolling Hills, CA (US);
The Regents of the University of California, Oakland, CA (US);
Abstract
A dual-band resonator with compact size, such as a resonant type dual-band antenna, which uses an anisotropic metamaterial is described. The artificial anisotropic medium is implemented by employing a composite right/left-handed transmission line. The dispersion relation and the antenna physical size only depend on the composition of the unit cell and the number of cells used. By engineering the characteristics of the unit cells to be different in two orthogonal directions, the corresponding propagation constants can be controlled, thus enabling dual-band antenna resonances. In addition, the antenna dimensions can be markedly minimized by maximally reducing the unit cell size. A dual-band antenna is also described which is designed for operation at frequencies for PCS/Bluetooth applications, and which has a physical size of 1/18λ× 1/18λ× 1/19λ, where λis the free space wavelength at 2.37 GHz.