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. 07, 2002
Filed:
Jan. 11, 2001
Shigekazu Ito, Sagamihara, JP;
Kazunari Kawahata, Machida, JP;
Abstract
A patch type radiation electrode is formed in the central area of the upper face of a dielectric substrate. First and second microstrip type radiation electrodes are formed on respective right and left sides of the patch type radiation electrode so as to sandwich the patch type radiation electrode. The first and second microstrip type radiation electrodes are symmetrical with respect to the patch type radiation electrode. If a microstrip type radiation electrode is formed on either one of the right and left sides of the patch type radiation electrode, the directivity of radio waves of the patch type radiation electrode become unsymmetrical, due to effects of the microstrip type radiation electrode. On the other hand, the directivity of radio waves of the patch type radiation electrode can be made symmetrical by forming the microstrip type radiation electrodes on both of the right and left sides of the patch type radiation electrode.